No. PROJECT TITLES YEAR ABSTRACT

IEEE 2016 PROJECTS

001 Front-End Isolated Quasi-Z-

Source DC-DC Converter

Modules in Series for

Photovoltaic High- Voltage DC

Applications

IEEE 2016

A quasi-Z-source modular cascaded converter (qZS-

MCC) is proposed for high-voltage (HV) dc

integration of photovoltaic (PV) power. The qZS-MCC

comprises frontend isolated qZS half-bridge (HB) dc-

dc converter sub modules (SMs) in series. By the qZS-

HB handling PV voltage and power variations, a

unified duty cycle is applicable for the front-end

isolation converter of all SMs. Resultantly, the

proposed system improves the quasi-Z-source

cascaded multilevel inverter and the modular

multilevel converter based PV counterparts in terms of

no double-line-frequency pulsating power so as to low

qZS impedance, HV dc collection of PV power thus to

reduce conversion stages for dc transmission, and

overcoming the limit of series-output voltage with

simple galvanic isolation. Operating principle and

power loss evaluation of the qZS-MCC are presented.

Parameter design guidelines and simulation are

addressed based on a 60- kW SM; experimental results

are carried out on a downscaled prototype as a proof-

of-concept, demonstrating the validity of the proposed

system.

002 A Single-Phase PV Quasi-Z-

Source Inverter With Reduced

Capacitance Using Modified

Modulation and Double-

Frequency Ripple Suppression

Control

IEEE 2016

In single-phase photovoltaic (PV) system, there is

Double-frequency power mismatch existed between

the dc input and ac output. The double-frequency

ripple (DFR) energy needs to be buffered by passive

network. Otherwise, the ripple energy will flow into

the input side and adversely affect the PV energy

harvest. In a conventional PV system, electrolytic

capacitors are usually used for this purpose due to

their high capacitance. However, electrolytic

capacitors are considered to be one of the most failure

prone components in a PV inverter. In this paper, a

capacitance reduction control strategy is proposed to

buffer the DFR energy in single-phase Z-source/quasi-

Z-source inverter applications. Without using any

extra hardware components, the proposed control

Strategy can significantly reduce the capacitance

requirement and achieve low input voltage DFR.

Consequently, highly reliable film capacitors can be

used. The increased switching device voltage stress and

power loss due to the proposed control strategy will

also be discussed. A 1-kW quasi-Z-source PV inverter

using gallium nitride (GaN) devices is built in the lab.

Experimental results are provided to verify the

effectiveness of the proposed method.

003 High-Gain Single-Stage Boosting

Inverter for Photovoltaic

Applications

IEEE 2016

This paper introduces a high-gain single-stage

boosting inverter (SSBI) for alternative energy

generation. As compared to the traditional two-stage

approach, the SSBI has a simpler topology and a lower

component count. One cycle control was employed to

generate ac voltage output. This paper presents

theoretical analysis,simulation and experimental

results obtained from a 200 W prototype. The

experimental results reveal that the proposed SSBI

can achieve high dc input voltage boosting, good dc–ac

power decoupling,good quality of ac output waveform,

and good conversionefficiency.

004 Highly Efficient Asymmetrical

PWM Full-Bridge Converter for

Renewable Energy Sources

IEEE 2016

This paper presents a highly efficient

asymmetrical pulse-width modulated (APWM) full-

bridgeconverter for renewable energy sources. The

proposed converter adopts full-bridge topology and

asymmetric control scheme to achieve the zero-voltage

switching (ZVS) turn-on of the power switches of the

primary side and to reduce the circulating current

loss. Moreover, the resonant circuit composed of the

leakage inductance of the transformer and the

blocking capacitor provides the zero-current switching

(ZCS) turn-off for the output diode without the help of

any auxiliary circuits. Thus, the reverse recovery

problem of the output diode is eliminated. In addition,

voltage stresses of the power switches are clamped

to the input voltage. Due to these characteristics, the

proposed converter has the structure to minimize

power losses. It is especially beneficial to the renewable

energy conversion systems. To confirm the theoretical

analysis and validity of the proposed converter, a 400

W prototype isimplemented with the input voltage

range from 40 to 80 V.

005 A High-Efficiency Flyback

Micro-inverter With a New

Adaptive Snubber for

Photovoltaic Applications

IEEE 2016

Based on the hybrid operation of interleaved flyback

micro-inverter in discontinuous and boundary

conduction modes (DCM and BCM), a novel adaptive

snubber is proposed in this paper. The proposed

snubber limits the drain-to-source voltage

overshoot of the flyback’s main switch during the

turn-off process,enabling the use of lower voltage

MOSFETs. It also recovers the stored energy in the

leakage inductance of the flyback transformer

and provides soft switching for the main flyback

switch by limiting the rising slope of the MOSFET

voltage during the turn-off process resulting in higher

efficiency. Exploiting the natural resonant of the

flyback converter in BCM, the adopted controller

provides ZVS and ZCS for the main switch during the

BCM operation. The operation of the flyback micro-

inverter with associated controllers is analytically

studied, and considerations for an optimum design

aiming to higher efficiency are presented. Performance

ofthe flybackmicro-inverter with the proposed

adaptive snubber and the corresponding controllers is

experimentally verified based on a 250W interleaved

flyback micro-inverter hardware setup.

006 An Optimal Method to Design a

Trap-CL Filter for a PV AC-

Module Based on Flyback

Inverter

IEEE 2016

The power factor and total harmonic distortion

(THD) are important considerations when designing

an output filter.In the case of the photovoltaic (PV) ac-

module, the size and weight also have to be taken into

consideration. This paper proposes an output filter to

reduce size and weight, and provides the optimal

design method for a PV ac-module. The proposed

output filter consists mainly of a conventional CL filter

with a trap filter.The trap filter is used to eliminate the

harmonic at the switching frequency that contains

most of the harmonics. Therefore, total inductance and

the size of the filter can be reduced although the

output filter components are increased. This paper

presents analysis of the proposed filter characteristics

in detail. Also, an optimal design method reducing the

size of the output filter components including the

damping resistor is proposed. The proposed methods

are verified on the experimental prototype rated at

320Wwith an ac-module based on the interleaved

flyback inverter. The total filter inductance and

volume are, respectively, reduced to 9.54% and

26.62% with the same performance.

007 Highly Reliable Transformerless

Photovoltaic Inverters With

Leakage Current and Pulsating

Power Elimination

IEEE 2016

This paper presents a transformerless inverter

topology, which is capable of simultaneously solving

leakage current and pulsating power issues in grid-

connected photovoltaic (PV) systems. Without adding

any additional components to the system, the leakage

current caused by the PV-to-ground parasitic

capacitance can be bypassed

by introducing a common-mode (CM) conducting path

to the inverter. The resulting ground leakage current

is therefore well controlled to be below the regulation

limit.Furthermore, the proposed inverter can also

eliminate the well-known double-line-frequency

pulsating power that is inherent in single-phase PV

systems. By properly injecting CM voltages to the

output filter capacitors, the pulsating power can be

decoupled from the dc-link. Therefore, it is possible to

use long-lifetime film capacitors instead of electrolytic

capacitors to improve the reliability of the PV

system. The mechanism of leakage current suppression

and the closed-loop control of pulsating power

decoupling are discussed in this paper in detail. A 500-

W prototypewas also built and tested in the

laboratory, and both simulation and experimental

results are finally presented to show the excellent

performance of the proposed PV inverter.

008 Transformerless Photovoltaic

Inverter Based on Interleaving

High-Frequency Legs Having

Bidirectional Capability

IEEE 2016

A novel bidirectional transformerless photovoltaic

(PV) inverter based on the high-frequency leg (HFL)

technique is proposed which can work on

discontinuous current mode/continuous current mode

having greatly enhanced reliability. With the high-

frequency leg, the smooth ac current is achieved

as the higher equivalent switching frequency can

reduce the inductor current ripple decreasing the

passive components’ volume. There is no dead time

issue which can push the duty cycle to the

theoretical limit and fully transfer the energy to grid

through total pulse widthmodulation. And the capacity

of the PV inverter can be expanded easily by

increasing the number of high-frequency

legs.Additionally, the proposed topology can work

under the rectifier mode having the bidirectional

power capability, which is attractive for the PV

application. In the end, the experimental results of 8-

kW laboratory prototype have verified the feasibility

and effectiveness of the proposed transformerless PV

inverter under standalone mode.

009 Design and Analysis of a High-

Efficiency DC–DC Converter

With Soft Switching Capability

for Renewable Energy

Applications Requiring High

IEEE 2016

Renewable sources like solar photovoltaic (PV) and

fuel cell stack are preferred to be operated at low

voltages. For applications such as grid-tied systems,

this necessitates high voltage boosting resulting in

efficiency reduction. To handle this issue, this paper

Voltage Gain proposes a novel high voltage gain, high-efficiency dc–

dc converter based on coupled inductor, intermediate

capacitor, and leakage energy recovery scheme. The

input energy acquired from the source is first stored in

the magnetic field of coupled inductor and

intermediate capacitor in a lossless manner.In

subsequent stages, it is passed on to the output section

for load consumption. A passive clamp network

around the primary inductor ensures the recovery of

energy trapped in the leakage inductance, leading to

drastic improvement in the voltage gain and efficiency

of the system. Exorbitant duty cycle values are not

required for high voltage gain, which prevents

problems such as diode reverse recovery.Presence of a

passive clamp network causes reduced voltage stress

on the switch. This enables the use of low voltage

rating switch (with low “ON-state” resistance),

improving the overall efficiency of the system.

Analyticaldetails of the proposed converter and its

hardware results are included.

010 Efficient Single Phase

Transformerless Inverter for

Grid-Tied PVG System With

Reactive Power Control

IEEE 2016

There has been an increasing interest in

transformerless inverter for grid-tied photovoltaic

(PV) system due to low cost, high efficiency, light

weight, etc. Therefore, many transformerless

topologies have been proposed and verified with real

power injection only. Recently, almost every

international regulation has imposed that a definite

amount of reactive power should be handled by the

grid-tied PV inverter. According to the standard

VDEAR-N 4105, grid-tied PV inverter of power rating

below 3.68KVA, should attain power factor (PF) from

0.95 leading to 0.95 lagging. IN this paper, a new high

efficiency transformerless topology is proposed for

grid-tied PV system with reactive power control.

The new topology structure and detail operation

principle with reactive power flow is described. The

high frequency commonmode (CM) model and the

control of the proposed topology are analyzed. The

inherent circuit structure of the proposed topology

does not lead itself to the reverse recovery issues even

when inject reactive power which allow utilizing

MOSFET switches to boost the overall efficiency. The

CM voltage is kept constant at midpoint of dc input

voltage, results low leakage current. Finally, to

validate the proposed topology, a 1 kW laboratory

prototype is built and tested. The experimental results

show that the proposed topology can inject reactive

power into the utility grid without any additional

current distortion and leakage current. The maximum

efficiency and European efficiency of the proposed

topology are measured and found to be 98.54% and

98.29%, respectively.

011 Single Phase Cascaded H5

Inverter with Leakage Current

Elimination for Transformerless

Photovoltaic System

IEEE 2016

Leakage current reduction is one of the important

issues for the transformelress PV systems. In this

Paper, the transformerless single-phase cascaded H-

bridge PV inverter is investigated. The common mode

model for the cascaded H4 inverter is analyzed. And

the reason why the conventional cascade H4 inverter

fails to reduce the leakage current is clarified. In order

to solve the problem, a new cascaded H5 inverter is

proposed to solve the leakage current issue. Finally,

the experimental results are presented to verify the

effectiveness of the proposed topology with the leakage

current reduction for the single phase transformerless

PV systems.

012 Bus Voltage Control With Zero

Distortion and High Bandwidth

for Single-Phase Solar Inverters

IEEE 2016

Single-phase inverters must include an energy storage

device, typically a high-voltage bus capacitor, to match

the inverter constant input power to its pulsating

output power. Because of its increased cost, the size of

this bus capacitor must be minimized. However, when

the bus capacitor is small, the bus voltage includes a

High ripple at the ac line second harmonic frequency,

which causes harmonic distortion. The bus voltage

controller must filter this ripple, while regulating the

bus voltage efficiently during transients, and must

therefore balance a tradeoff between two conflicting

constraints, low-harmonic distortion and high

bandwidth. This paper analyzes this tradeoff, and

proposes a new control method for solving it without

using addition hardware. Instead of reducing the

Distortion by lowering the loop gain, the new

controller employs a digital FIR filter that samples the

bus voltage at an integer multiple of the second

harmonic frequency. The filter presents a notch that

removes the second harmonic ripple, enabling a design

that operates with zero distortion and high bandwidth

simultaneously, and is suitable for inverters with small

bus capacitors. The proposed controller is tested on a

micro inverter prototype with a 300-W photovoltaic

panel and a 20-μF bus capacitor.

013 A Medium Frequency

Transformer-Based Wind

Offshore wind farms with series-interconnected

structures are promising configurations because bulky

Energy Conversion System Used

for Current Source Converter

Based Offshore Wind Farm

IEEE 2016

and costly offshore substations can be eliminated. In

this work, a medium-frequency transformer (MFT)-

based wind energy conversion system is proposed for

such wind farms based on current source converters.

The presented configuration consists of a medium-

voltage permanent magnet synchronous generator that

is connected to a low-cost passive rectifier, an MFT-

based cascaded converter, and an onshore current

source inverter. Apart from fulfilling traditional

control objectives (maximum power point tracking,

dc-link current control, and reactive power

regulation), this work endeavors to ensure evenly

distributed power and voltage sharing among the

constituent modules given the cascaded structure of

the MFT-based converter. In addition, this paper

thoroughly discusses the characteristic of decoupling

between the voltage/power balancing of the modular

converter and the other control objectives. Finally,

both simulation and experimental results are provided

to reflect the performance of the proposed system.

014 Sliding Mode Control of PMSG

Wind Turbine Based on

Enhanced Exponential Reaching

Law

IEEE 2016

This paper proposes a Sliding Mode Control (SMC)

based scheme for a variable speed, direct-driven

Wind Energy Conversion Systems (WECS) equipped

with Permanent Magnet Synchronous Generator

(PMSG) connected to the grid. In this work, diode

rectifier, boost converter, Neutral Point Clamped

(NPC) inverter and L filter are used as the interface

between the wind turbine and grid. This topology has

abundant features such as simplicity for low and

medium power wind turbine applications. It is also less

costly than back-to-back two-level converters in

medium power applications. SMC approach

demonstrates great performance in complicated

nonlinear systems control such as WECS. The

proposed control strategy modifies Reaching Law

(RL) of sliding mode technique to reduce chattering

issue and to improve THD property compared to

Conventional reaching law SMC. The effectiveness of

the proposed control strategy is explored by simulation

study on a 4 kW wind turbine, and then verified by

experimental tests for a 2 kW set-up.

015 Control and Operation of a DC

Grid-Based Wind Power

Generation System in a

This paper presents the design of a dc grid-based wind

Power generation system in a poultry farm. The

proposed system allows flexible operation of multiple

Microgrid

IEEE 2016

parallel-connected wind generators by eliminating the

need for voltage and frequency synchronization.

A model predictive control algorithm that offers better

Transient response with respect to the changes in the

operating conditions is proposed for the control of the

inverters. The design concept is verified through

various test scenarios to demonstrate the operational

capability of the proposed micro grid when it operates

Connected to and islanded from the distribution grid,

and the results obtained are discussed.

016 An Offshore Wind Generation

Scheme With a High-Voltage

Hybrid Generator, HVDC

Interconnections,and

Transmission

IEEE 2016

A new offshore high-voltage dc (HVDC) wind

generation scheme is proposed in this paper. The

scheme implements a high-voltage hybrid generator

(HG) as well as HVDC interconnection and

transmission systems. The turbine power train of the

Proposed system is compared with a typical system

installed in a commercial wind farm. The analyses

demonstrate improvements in system losses and,

hence, efficiency, power-train hardware, including

Cable system mass and, importantly, a reduction in

major component count and installed power

electronics in the nacelle and turbine tower, features

that lead to reduced capital cost and maintenance. The

resulting power conversion system is more simplified

and more amenable to higher voltage implementation

Since it is not constrained by existing state-of-art

power-electronic voltage–source converter structures.

Voltage control is facilitated via dc/dc converters

located away from the turbine tower. To demonstrate

the HG operational concept, measured results from

a low-power laboratory prototype HG system are

compared with analytical results and show good

agreement.

017 Grid-Connected PV-Wind

Battery based Multi-Input

Transformer Coupled

Bidirectional DC-DC Converter

for household Applications

IEEE 2016

In this paper, a control strategy for power flow

Management of a grid-connected hybrid PV-wind-

battery based system with an efficient multi-input

transformer coupled bidirectional dc-dc converter is

presented. The proposed system aims to satisfy the

load demand, manage the power flow from different

sources, inject surplus power into the grid and charge

the battery from grid as and when required. A

transformer coupled boost half-bridge converter is

used to harness power from wind, while bidirectional

buck-boost converter is used to harness power from

PV along with battery charging/discharging control. A

single-phase full-bridge bidirectional converter is used

For feeding ac loads and interaction with grid. The

proposed converter architecture has reduced number

of power conversion stages with less component count,

and reduced losses compared to existing grid

connected hybrid systems. This improves the

Efficiency and reliability of the system. Simulation

results obtained using MATLAB/Simulink show the

performance of the proposed control strategy for

power flow management under various modes

Of operation. The effectiveness of the topology and

efficacy ofthe proposed control strategy are validated

through detailed experimental studies, to demonstrate

the capability of the system

Operation in different modes.

018 Design and Real-Time

Controller Implementation for a

Battery-Ultracapacitor Hybrid

Energy Storage System

IEEE 2016

In this work, two real-time energy management

strategies have been investigated for optimal current

split between batteries and ultra capacitors (UCs) in

electric vehicle (EV) applications. In the first strategy,

an optimization problem is formulated and solved

using Karush-Kuhn-Tucker (KKT) conditions to

obtain the real-time operation points of current split

for the hybrid energy storage system (HESS). In the

second strategy, a neural network based strategy is

implemented as an intelligent controller for the

proposed system. To evaluate the performance of these

two real-time strategies, a performance metric based

on the battery state-of-health (SoH) is developed to

reveal the relative impact of instantaneous battery

currents on the battery degradation. A 38V-385Wh

battery and a 32V-4.12Wh UC HESS hardware

prototype has been developed and a real-time

experimental platform has been built for energy

management controller validation, using xPC Target

and National Instrument data acquisition system

(DAQ). Both the simulation and real-time experiment

results have successfully validated the real-time

implementation feasibility and effectiveness of the two

real-time controller designs. It is shown that under a

high speed, high acceleration, aggressive drive cycle

US06, the two real-time energy management strategies

can greatly reduce the battery peak current and

consequently decreases the battery SoH reduction by

31% and 38% in comparison to a battery-only energy

storage system.

019 Control and Implementation of

a Standalone Solar Photo-

Voltaic Hybrid System

IEEE 2016

A control algorithm for a standalone solar

photovoltaic (PV)-diesel-battery hybrid system is

implemented in this paper. The proposed system deals

with the intermittent nature of the energy generated

by the PV array and it also provides power quality

improvement. The PV array is integrated through a

DC-DC boost converter and controlled using a

maximum power point tracking (MPPT) algorithm to

obtain the maximum power under varying operating

conditions. The battery energy storage system (BESS)

is integrated to the diesel engine generator (DG) set for

the coordinated load management and power flow

within the system. The admittance based control

algorithm is used for load balancing, harmonics

elimination and reactive power compensation under

three phase four-wire linear and nonlinear loads. A

four-leg voltage source converter (VSC) with BESS

also provides neutral current compensation. The

performance of proposed standalone hybrid system is

studied under different loading co

020 Ultracapacitor-Battery Hybrid

Energy Storage System Based on

the Asymmetric Bidirectional

Z-Source Topology for EV

IEEE 2016

This paper proposes an ultra capacitor (UC)-battery

Hybrid energy storage system (HESS) for electric

vehicle based on asymmetric bidirectional Z-source

topology. Compared with the conventional two-stage

design, the HESS can be incorporated into the traction

inverter system, leading to better performance and

Lower cost. The UC energy can be effectively utilized

due to the buck/boost characteristic in the Z-source

converter; meanwhile, the battery converter gets

eliminated in this case. The assumption about the

symmetry in the Z-source topology impendence

network states for the conventional analysis no longer

applies to the proposed HESS configuration. The

asymmetric characteristic related with the uneven

power distribution of UCs and battery is

mathematically excavated in detail. The frequency

dividing coordinated control is proposed to exploit the

advantages of UCs and battery. The battery peak

current estimation is then investigated. Finally,

The steady performance and transient response in

both traction and regenerative modes are verified by

simulation and experimental results.

021 Development of DC/DC

Converter for Battery Energy

Storage Supporting Railway

DC Feeder Systems

IEEE 2016

This paper describes the development of a bilateral

DC/DC converter rated at 1500 V with a peak

power of 500 kW for battery energy storage systems

Supporting railway DC feeder systems. The DC/DC

Converter converts regenerated power from a braking

train and charges the batteries. The DC/DC converter

discharges the stored energy to feed the train during

powering. The converter main circuit and the control

system are described, and successful test results

obtained at the factory are reported. For the main

circuit test, a special test method was applied. For the

control system test, a real-time digital simulator was

used for hardware-in-loop tests. In addition to the

converter tests, the results from DC feeder system

tests with an actual rectifier and battery bank are also

Presented.

022 High Efficiency Bi-Directional

Converter for Flywheel Energy

Storage Application

IEEE 2016

A bidirectional converter (BDC) is essential in

applications where energy storage devices are

involved. Such applications include transportation,

battery less UPS, Flywheel Energy Storage (FES)

systems etc. Bidirectional power flow through buck

and boost mode operation along with high power

Density and efficiency are important requirements of

such systems. This paper presents a new BDC topology

using a combination of fast turn off SCR and IGBT

with a novel control logic implementation to achieve

zero switching losses through Zero Voltage Transition

(ZVT) and Zero Current Transition (ZCT) techniques.

The proposed scheme ensures Zero Switching

Power Loss (ZSPL) for both buck and boost modes of

operation of the BDC. The scheme is simple and

achieves ZSPL during both turn-on and turn-off of the

devices resulting in improved efficiency and reduced

EMI problems. The basic principle of operation,

analysis, and design procedure are presented for both

Voltage buck and boost modes of operation of the

proposed BDC topology. A design example is

presented. Limitations of the system are highlighted.

Experimental and simulation results obtained on a

4kW, 340V input prototype with a switching frequency

of 15.4 kHz are presented to verify the design.

023 Series-Parallel Connection of

Low-Voltage Sources for

Integration of Galvanically

Isolated Energy Storage Systems

This work explores the Series-Parallel Connection of a

Low Voltage Super capacitor Module to obtain Hybrid

Energy Storage System for grid support applications.

The Hybrid System is formed by the Super capacitor

IEEE 2016

Module itself, intended to ensure fast performance

upon peak power requirements, together with a

battery that provides the energy requirements. In the

full system, the front end converter and the load

interfacing converter share a common DC link. The

battery is connected to the DC link by means of a Full-

Bridge Current- Source bidirectional DC-DC

converter. The Super capacitor Module is connected to

the system using a Series-Parallel Configuration,

which overcomes the main problems that arise with

the most common topologies found in the literature.

The full

Operation of the system has been demonstrated

theoretically and by simulations. A demonstration of

such connection is shown experimentally, in a

converter operating at reduced power levels,

in order to validate the feasibility of

thesystem.Conclusions show how this scheme can be

used in Hybrid Storage Systems

024 An Interleaved Half-Bridge

Three-Port Converter With

Enhanced Power Transfer

Capability Using Three-Leg

Rectifier for Renewable Energy

Applications

IEEE 2016

In this paper, an interleaved half-bridge (IHB) three-

port converter (TPC) is proposed for a renewable

power system. The IHB-TPC is used to interface three

power ports: 1) one source port; 2) one battery port;

and 3) one isolated load port. The proposed IHB-TPC

is derived by integrating two half bridge TPC modules.

A parallel configuration is adopted for the primary

side of the two half-bridge modules, while a parallel–

Series configuration is adopted for the secondary side

of the two modules. The power can be transferred

from the source and the battery to the load within the

whole switching cycle with the proposed IHB-TPC. It

means there are no additional conduction losses caused

by the circulating current or the free-wheeling

operation stage. Hence, the voltage gain can be

extended, and the output filter can be reduced. Zero-

voltage switching is realized for all the four main

switches to reduce the switching losses. Two of

the three ports can be tightly regulated by adopting

pulse width modulation plus phase-shift control, while

the third port is left unregulated to maintain power

balance for the system. The operation principles and

the performances of the proposed converter are

analyzed in detail. The experimental results are

Given to verify the feasibility and the effectiveness of

the proposed converter.

025 Secondary-Side-Regulated Soft-

Switching Full-Bridge Three-

Port Converter Based on

Bridgeless Boost Rectifier and

Bidirectional Converter for

Multiple Energy Interface

IEEE 2016

A systematic method for deriving soft-switching

Three-port converters (TPCs), which can interface

multiple energy, is proposed in this paper. Novel full-

bridge (FB) TPCs featuring single-stage power

conversion, reduced conduction loss, and low voltage

Stress are derived. Two no isolated bidirectional

power ports and one isolated unidirectional load port

are provided by integrating an interleaved

bidirectional Buck/Boost converter and a bridgeless

Boost rectifier via a high-frequency transformer. The

Switching bridges on the primary side are shared;

hence, the number of active switches is reduced.

Primary-side pulse widthmodulation and secondary-

side phase shift control strategy are employed

To provide two control freedoms. Voltage and power

regulations over two of the three power ports are

achieved. Furthermore, the current/voltage ripples on

the primary-side power ports are reduced due to the

interleaving operation. Zero-voltage switching

And zero-current switching are realized for the active

switches and diodes, respectively. A typical FB-TPC

with voltage-double rectifier developed by the

proposed method is analyzed in detail. Operation

principles, control strategy, and characteristics of the

FB-TPC are presented. Experiments have been carried

out to demonstrate the feasibility and effectiveness of

the proposed topology derivation method.

026 Analysis, Design, Modelling and

Control of an Interleaved-Boost

Full-Bridge Three-Port

Converter for Hybrid

Renewable Energy Systems

IEEE 2016

This paper presents the design, modelling and control

of a three-port (TPC) isolated dc-dc converter based

on interleaved-boost-full-bridge with pulse-width-

modulation and phase-shift control for hybrid

renewable energy systems. In the proposed topology,

the switches are driven by phase-shifted PWM signals,

where both phase angle and duty cycle are controlled

variables. The power flow between the two inputs is

Controlled through the duty cycle, whereas the output

voltage can be regulated effectively through the phase-

shift. The primary side MOSFETs can achieve zero-

voltage switching (ZVS) operation without additional

circuitry. Additionally, due to the ac output inductor,

the secondary side diodes can operate under zero

current switching (ZCS) conditions. In this work, the

operation principles of the converter are analyzed and

the critical design considerations are discussed. The

dynamic behavior of the proposed ac inductor based

TPC is investigated by performing state-space

modelling. Moreover, the derived mathematical

Models are validated by simulation and

measurements. In order to verify the validity of the

theoretical analysis, design and power decoupling

control scheme, a prototype is constructed and tested

under the various modes, depending on the availability

of the Renewable energy source and the load

consumption. The experimental results show that the

two decoupled controlvariables achieve effective

regulation of the power flow among the three ports.

027 A Triple Active Bridge DC-DC

Converter Capable of Achieving

Full-Range ZVS

IEEE 2016

In this paper, a triple active bridge converter is

Proposed. The topology is capable of achieving ZVS

across the full load range with wide input voltage while

minimizing heavy load conduction losses to increase

overall efficiency. This topology comprises three full

bridges coupled by a three-winding transformer. At

light load, by adjusting the phase shift between

two input bridges, all switching devices can maintain

ZVS due to a controlled circulating current. At heavy

load, the two input bridges work in parallel to reduce

conduction loss. The operation principles of this

topology are introduced and the ZVS boundaries are

derived. Based on analytical models of power loss, a

200Wlaboratory prototype has been built to verify

theoretical considerations.

028 A Family of Isolated Buck-Boost

Converters Based on Semiactive

Rectifiers for High-Output

Voltage Applications

IEEE 2016

A systematic method for developing isolated buck

boost (IBB) converters is proposed in this paper, and

single-stage power conversion, soft-switching

operation, and high-efficiency performance can be

achieved with the proposed family of converters. On

the basis of a nonisolated two-switch buck-boost

converter, the proposed IBB converters are generated

by replacing the dc buck-cell and boost-cell in the non-

IBB converter with the ac buck-cell and boost-cell,

respectively. Furthermore, a family of semi active

rectifiers (SARs) is proposed to serve as the secondary

Rectification circuit for the IBB converters, which

helps to extend the converter voltage gain and reduce

the voltage stresses on the devices in the rectification

circuit. Hence, the efficiency is improved by employing

a transformer with a smaller turns ratio and reduced

Parasitic parameters, by using low-voltage rating

MOSFETs and diodes with better switching and

conduction performances. A full bridge IBB converter

is proposed and analyzed in detail as an example. The

phase-shift modulation strategy is applied to the

Full-bridge IBB converter to achieve IBB conversion.

Moreover, soft-switching performance of all active

switches and diodes can be achieved over a wide load

and voltage range by the proposed converter and

control strategy. A 380-V-output prototype is

fabricated to verify the effectiveness of the proposed

family of IBB converters, the SARs, and the control

strategies.

029 Flying-Capacitor-Based Hybrid

LLC Converters With Input

Voltage Autobalance Ability for

High Voltage Applications

IEEE 2016

An advanced hybrid LLC series resonant converter

With integrated flying-capacitor cell is proposed in

this paper to enable the high step-down conversion in

the high input voltage applications. The inherent

flying-capacitor branch in the primary side can

effectively halve the primary switch voltage stress

compared with the half-bridge LLC converters. And

the input voltage can be shared equally and

automatically between the two series half-bridge

modules without additional balance circuit or control

strategies due to the built-in flying-capacitor cell.

Moreover, the Inherent soft switching performance

during wide load range that exists in the LLC

converters is still kept to reduce the switching losses,

which ensures the high efficiency. Besides, the

proposed converter can be extended to further

decrease the switch voltage Stress by employing

stacked connection. Finally, 500∼640 V input 48 V-

output 1 kW prototype is built and tested to verify the

effectiveness of the proposed converter. The results

prove that the proposed converter is an excellent

candidate for the high input Voltage and high step-

down dc/dc conversion systems.

030 A DC–DC Converter With High

Voltage Gain and Two Input

Boost Stages

IEEE 2016

A family of nonisolated high-voltage-gain dc–dc

Power electronic converters is proposed. The

suggested topologies can be used as multiport

converters and draw continuous current from two

input sources. They can also draw continuous current

from a single source in an interleaved manner. This

versatility makes them appealing in renewable

applications such as solar farms. The proposed

converters can easily achieve a gain of 20 while

benefiting from a continuous input current. Such a

converter can individually link a PV panel to a 400-V

dc bus. The design and component selection

procedures are presented. A 400-W prototype

Of the proposed converter with Vin = 20 and V out =

400 V has been developed to validate the analytical

results.

031 High Gain DC–DC Converter

Based on the Cockcroft–Walton

Multiplier

IEEE 2016

Recent advancements in renewable energy have

created a need for both high step-up and high-

efficiency dc–dc converters. These needs have typically

been addressed with converters using high-frequency

transformers to achieve the desired gain. The

transformer design, however, is challenging. This

paper presents a high step-up current fed converter

based on the classical Cockcroft–Walton (CW)

multiplier. The capacitor ladder allows for high

voltage gains without a transformer. The cascaded

structure limits the voltage stresses in the converter

stages, even for high gains. Being current-fed, the

converter (unlike traditional CW multipliers) allows

the output voltage to be efficiently controlled. In

Addition, the converter supports multiple input

operation without modifying the topology. This makes

the converter especially suitable for photovoltaic

applications where high gain, high efficiency, small

converter size, and maximum power point tracking

are required. Design equations, a dynamic model, and

possible control algorithms are presented. The

converter operation was verified using digital

simulation and a 450-W prototype converter.

032 A Three-State Switching Boost

Converter Mixed With Magnetic

Coupling and Voltage Multiplier

Techniques for High Gain

Conversion

IEEE 2016

An asymmetrical three-state switching boost

converter, combining the benefits of magnetic coupling

and voltage multiplier techniques, is presented in this

paper. The derivation procedure for the proposed

topology is depicted. The new converter can achieve a

very high-voltage gain and a very low-voltage

Stress on the power devices without high turn ratio

and extreme duty cycles. Thus, the low-voltage-rated

MOSFETs with low resistancerDS (ON) can be

selected to reduce the switching losses and cost.

Moreover, the usage of voltage multiplier technique

not only raises the voltage gain but also offers lossless

passive clamp

Performance, so the voltage spikes across the main

switches are alleviated and the leakage-inductor

energy of the coupled inductors can be recycled. In

addition, the interleaved structure is employed in the

input side, which not only reduces the current stress

through each power switch, but also constrains the

input current ripple. In addition, the reverse-recovery

problem of the diodes is alleviated, and the efficiency

can be further improved. The operating principles

And the steady-state analysis of the presented

converter are discussed in detail. Finally, a prototype

circuit with 400-W nominal rating is implemented in

the laboratory to verify the performance of the

proposed converter.

033 A Low-Volume Hybrid Step-

Down Dc-Dc Converter Based

on the Dual Use of Flying

Capacitor

IEEE 2016

This paper introduces a hybrid step-down dc-dc

converter, targeted for battery powered portable

applications where low-volume implementation is the

key priority. The introduced architecture, combining

switched-capacitor (SC) and inductor based circuits,

requires low-volume for implementation by reducing

the size of the filer inductor by 4 times and the output

capacitor by 2 times. In addition to supporting wide

input-output range for step down voltage conversions,

the introduced architecture demonstrates up to 15 %

power processing efficiency improvement compared to

conventional buck converter and faster dynamic

response. These advantages are obtained by a dual use

of the flying capacitor usually existing in SC

converters. The flying capacitor is used for both

balancing of the front-end stage and reducing voltage

swing/stress of the components. Experimental results

from a 5 V, 25 W, 500 kHz prototype verify

advantages of the introduced converter.

034 A Novel Transformer-less

Interleaved Four-Phase Step-

Down DC Converter With Low

Switch Voltage Stress and

Automatic Uniform Current-

Sharing Characteristics

IEEE 2016

In this paper, we propose a novel transformer-less

direct current (dc) converter that features low switch

voltage stress and automatic uniform current sharing.

An interleaved four-phase voltage divider operating

from a 400 V dc bus is used to achieve a high step-

down conversion ratio with a moderate duty ratio.

Based on the capacitive voltage division, the proposed

converter achieves two major objectives, i.e., increased

voltage conversion ratio, due to energy storage in the

blocking capacitors, and reduced voltage stress of

active switches and diodes. As a result, the proposed

converter permits the use of lower voltage rating

MOSFETs to reduce both switching and conduction

losses, thereby improving the overall efficiency. In

addition, due to the charge balance of the capacitors,

the proposed converter enables automatic uniform

current sharing of the interleaved phases without

adding extra circuitry or complex control methods.

The operation principles and performance analyses of

the proposed converter are presented, and its

Effectiveness is verified by a 500Woutput power

prototype circuit that converts 400 V input voltage

into 24 V output voltage.

035 Morphing Switched-Capacitor

Step-Down DC–DC Converters

with Variable Conversion Ratio

IEEE 2016

High-voltage-gain and wide-input-range DC–DC

Converters are widely used in various electronics and

industrial products such as portable devices,

telecommunication, automotive, and aerospace

systems. The two-stage converter is a widely adopted

architecture for such applications, and it is proven to

have a higher efficiency as compared with that of the

single-stage

Converter. This paper presents a modular-cell-based

morphing switched-capacitor (SC) converter for

application as a front-end converter of the two-stage

converter. The conversion ratio of this converter is

flexible and can be freely extended by increasing more

SC modules. The varying conversion ratio is achieved

through the morphing of the converter’s structure

corresponding to the amplitude of the input voltage.

This converter is light and compact, and is highly

efficient over a very wide range of input voltage and

load conditions. Experimental results show that the

efficiency of a single SC module is higher than 98%.

036 High-Efficiency Coupled-

Inductor-Based Step-Down

Converter

IEEE 2016

This study mainly investigates a high-efficiency single-

input multiple-output (SIMO) step-down converter.

The proposed converter can step down the voltage of a

high-voltage dc bus generated by the rectifier of an ac

utility power to a controllable low-voltage output

terminal and middle-voltage output terminals. In this

study, a coupled-inductor-based SIMO step-down

Converter utilizes two power switches with the

properties of voltage clamping for the middle-voltage

switch, and soft switching for all power switches due to

the appropriate choice of the corresponding device

specifications. As a result, the leakage inductor energy

of the coupled inductor can be recycled, and the

voltage spikes on power switches can be alleviated.

Moreover, the switching losses can be significantly

decreased because of all power switches with

Zero-voltage-switching features. Therefore, the

objectives of high efficiency power conversion, high

step-down ratio, and various output voltage with

different levels can be obtained. The effectiveness

Of the proposed SIMO step-down converter is verified

by experimental results of a converter prototype in

practical applications.

037 Isolated Double Step-down DC-

DC Converter with Improved

ZVS Range and No Transformer

Saturation Problem

IEEE 2016

In this paper, an isolated double step-down DC-DC

converter with high efficiency and high step-down

function is proposed. The proposed converter employs

an additional capacitor in the primary side. Compared

to the conventional full-bridge converters, the

proposed converter has a double step-down feature

with reduced voltage stress at the primary side of the

transformer. Moreover, voltage stress of three

primary side switches reduces to half of the input

voltage and zero voltage switching (ZVS) is naturally

achieved for all switches with lower output capacitor

energy of the switches. Therefore, the proposed

converter requires smaller leakage inductance than

the conventional full-bridge converter. Without adding

complexity to the hardware and control, the proposed

converter inherently prevents transformer saturation

problem caused by the DC component of the

transformer. A 3-kW experimental prototype is

constructed to verify the performance of the proposed

converter.

038 A New Compact and High

Efficiency Resonant Converter

IEEE 2016

This paper explores a new resonant converter which

features compact size, high efficiency, and

compatibility with self-driven synchronous rectifiers.

The proposed resonant converter and the LLC series

resonant converter (LLC-SRC) are in the same three-

element resonant converter category and these two

converters both consist of 2 inductors and one

capacitor in their resonant tanks. While the LLC-SRC

converter has all of its resonant elements on the input

side, the proposed resonant converter has one of its

resonant inductors on the output side. Utilizing the

output resonant inductor allows the proposed resonant

converter to implement self-driven synchronous

rectifiers. When comparing the series resonant

inductor in the LLC-SRC, the output inductor in the

proposed resonant converter generally has lower cost

and smaller size in voltage step down applications.

Operational analysis of the proposed resonant

converter is made through sinusoidal approximation.

A 250W prototype of the proposed resonant converter

is built to verify the analysis made in this paper and

evaluate its performance. With the same soft-switching

characteristics as the LLC-SRC has, the proposed

resonant converter can achieve 95.7% efficiency in a

430V to 27.5V/9A conversion even with diode

rectifiers.

039 A Sensitivity-Improved PFM

LLC Resonant Full-Bridge DC-

DC Converter with LC Anti-

Resonant Circuitry

IEEE 2016

An LLC resonant circuit-based full-bridge dc-dc

converter with an LC anti-resonant tank for

improving the performance of pulse-frequency-

modulation (PFM) is proposed in this paper. The

proposed resonant dc-dc converter, named as LLC-LC

converter can extend a voltage regulation area below

the unity gain with a smaller frequency variation

ofPFM by the effect of the anti-resonant tank. This

advantageous property contributes for protecting

over-current in the case of The short-circuit load

condition as well as the start-up interval in the

designed band of switching frequency. The circuit

topology and operating principle of the proposed

converter is described, after which the design

procedure of the operating frequency and circuit

parameters is presented. The performances on the soft

switching and the steady-state PFM characteristics of

the LLC-LC converter are evaluated under the open-

loop control in experiment of a 2.5kW prototype, and

its actual efficiency is compared with a LLC converter

prototype. For revealing

the effectiveness of the LLC-LC resonant circuitry,

voltages and currents of the series and anti-resonant

tanks are analyzed respectively with state-plane

trajectories based on calculation and experiment,

whereby the power and energy of each resonant tank

are demonstrated. Finally, the feasibility of the

proposed converter is evaluated from the practical

point of view.

040 High-Efficiency LLC Resonant

Converter With High Voltage

Gain Using an Auxiliary LC

Resonant Circuit

To design an LLC resonant converter optimally in the

wide input voltage range, the LLC resonant converter

with high efficiency and high voltage gain using an

auxiliary LC resonant circuit is proposed. In this

paper, the auxiliary LC resonant circuit operates as a

variable inductor according to the change of the

switching frequency, and it is presented as an effective

magnetizing inductance. In the nominal state, since the

effective magnetizing inductance increases, the

primary circulating current is decreased. Thus, the

turn-off switching loss of the primary switches and the

Primary conduction loss are minimized. During the

hold-up time, the effective magnetizing inductance

IEEE 2016 decreases so that the proposed converter has a high

voltage gain. As a result, an optimal design of the LLC

resonant converter over the wide input voltage range

is possible. The proposed converter is verified by

experimental results with a 330–390 V input and 350

W (56 V/6.25 A) output prototype.

041 Hybrid Bridgeless DCM SEPIC

Rectifier Integrated with a

Modified Switched Capacitor

Cell

IEEE 2016

In this paper is proposed a novel single-phase PWM

bridgeless rectifier, based on SEPIC converter

topology, integrated with a modified switched

capacitor cell. The structure has the absence of the

diode bridge at the input port reducing the number of

components and conduction losses. Besides, it has the

Presence of a switched capacitor cell, providing double

gain at the output voltage. A comparison with the

conventional SEPIC shows that the proposed

converter has lower voltage stress on the

Semiconductors when both converters are designed for

the same output voltage, and the same voltage stress

across the semiconductors when the output voltage of

the proposed converter is twice bigger than the

conventional SEPIC. Therefore, the proposed

structure can be applied in DCM SEPIC rectifiers

improving the converter static gain, making it suitable

For higher voltage applications. The paper also

proposes a modified switched capacitor cell, which

does not change the storage capacitor operation mode

of the SEPIC rectifier. To validate the theoretical

analyses a prototype of 500 W was built considering an

input and an output voltage of 220 V and 400 V,

Respectively, and a switching frequency of 50 kHz.

042 Multi-input Step-Up Converters

Based on the Switched-Diode-

Capacitor Voltage Accumulator

IEEE 2016

This paper introduces the application of switched

diode- capacitor voltage accumulator (SDCVA) on

conventional boost converter. This study aims to

obtain two different kinds ofmulti-input step-up

converters with high voltage gains, low component

Stresses, low ripples, simple control, and high

conversion efficiencies: one is based on the parallel

SDCVA and the other based on the serial SDCVA. The

double-input step-up converter based on the parallel

SDCVA and the double-input step-up converter

Based on the serial SDCVA are, respectively, taken as

an example to do theoretical analysis, including

operating principles and performance analyses when

they work individually and simultaneously. The two

proposed converters are implemented with a voltage

closed-loop control at the switching frequency of 30

kHz. Experimental results obtained from the

implemented prototypes are provided to validate the

feasibility and effectiveness of the proposed converters.

043 Split-Phase Control: Achieving

Complete Soft-Charging

Operation of a Dickson

Switched-Capacitor Converter

IEEE 2016

Switched-capacitor (SC) converters are gaining

popularity due to their high power density and

suitability for on-chip integration. Soft-charging and

resonant techniques can be used to eliminate the

current transient during the switching instances, and

Improve the power density and efficiency of SC

converters. In this paper, we propose a split-phase

control scheme that enables the Dickson converter to

achieve complete soft-charging (or resonant)

operation, which is not possible using the conventional

two-phase control. An analytical method is extended to

help in the analysis and design of split-phase

controlled Dickson converters. The proposed

technique and analysis are verified by both simulation

and experimental results. An 8-to-1 step-down Dickson

converter with an input voltage of 150 V and rated

power of 36 W is built using GaN FETs. The converter

prototype demonstrated a fivefold reduction in the

output impedance (which corresponds to conduction

Power loss) compared to a conventional Dickson

converter, as a result of the split-phase controlled soft-

charging operation.

044 A Bridgeless Totem-pole

Interleaved PFC Converter for

Plug-In Electric Vehicles

IEEE 2016

This paper proposes a bidirectional bridgeless totem-

pole interleaved power-factor-correction (PFC)

converter using SiC MOSFETs as the front-end stage

of an onboard charger for plug-in electric vehicles

(PEVs). The proposed converter provides bidirectional

operation enabling both grid-to-vehicle (G2V)

charging and vehicle-to-grid (V2G)Ancillary services.

The converter is suitable for efficient G2V V2G

onboard charging due to its superiorities in terms of

bidirectional operation, smaller current ripple, lower

EMI, lower conduction losses and switching losses. A

3.3kW PFC converter is designed and developed, using

Silicon-Carbide MOSFETs with fast recovery body

diodes, for validation of and V2G operating modes.

Utilizing SiC MOSFETs enables continuous current

mode (CCM) operation of the totem-pole PFC

converter in high-power applications. The converter is

capable of converting 85Vac-265Vac line voltages into

a Regulated dc voltage in the range of 300V to 600V.

The Maximum efficiency of converter reaches up to

99.2% with 0.99 power factor.

045 Full-Range Soft-Switching-

Isolated Buck-Boost Converters

With Integrated Interleaved

Boost Converter and Phase-

Shifted Control

IEEE 2016

A new method for deriving isolated buck-boost (IBB)

Converter with single-stage power conversion is

proposed in this paper and novel IBB converters based

on high-frequency bridgeless interleaved boost

rectifiers are presented. The semiconductors,

conduction losses, and switching losses are reduced

significantly by integrating the interleaved boost

converters into the full-bridge diode-rectifier. Various

high-frequency bridgeless boost rectifiers

Are harvested based on different types of interleaved

boost converters, including the conventional boost

converter and high step-up boost converters with

voltage multiplier and coupled inductor. The

Full-bridge IBB converter with voltage multiplier is

analyzed in detail. The voltage multiplier helps to

enhance the voltage gain and reduce the voltage

stresses of the semiconductors in the rectification

circuit. Hence, a transformer with reduced turns ratio

and parasitic parameters, and low-voltage

ratedMOSFETs and diodes with better switching and

conduction performances can be applied to improve

the efficiency. Moreover, optimized phase-shift

modulation strategy is applied to the full-bridge IBB

converter to achieve isolated buck and boost

conversion. What’s more, soft-switching performance

of all of the active switches and diodes within the

Whole operating range is achieved. A 380-V output

prototype is fabricated to verify the effectiveness of the

proposed IBB converters and its control strategies.

046 A PWM Plus Phase-Shift

Controlled Interleaved Isolated

Boost Converter Based on

Semiactive Quadrupler Rectifier

for High Step-Up Applications

IEEE 2016

Semi active quadruple rectifiers (SAQRs) are

proposed in this paper to serve as the secondary

rectification circuits, which make the secondary-side

voltages to be controllable and help reduce current

stress and conduction losses. An interleaved isolated

boost converter is developed based on the proposed

SAQRs. By utilizing the pulse-width modulation

(PWM) plus phase-shift (PPS) control strategy, the

primary- and secondary-side voltages are well

matched to reduce the current values and circulating

Conduction losses. With the proposed SAQRs, the

voltage gain is extended and the voltage stresses on

power devices and passive components used in

rectification circuits are reduced to the half of the high

output voltage. Hence, the efficiency is improved by

using a transformer with a smaller turn’s ratio and

reduced parasitic parameters, and by employing low-

voltage rating devices with better switching and

conduction performance. With optimal design, lower

voltage, and current stresses on the primary-side

switches, minimized input current ripple can

Be realized. Moreover, the zero-voltage turn on

switching of the active switches and the zero-current

turn off switching of the diodes can be achieved over a

wide load and voltage range by the proposed SAQR-

based converter and the control strategy. Meanwhile,

the higher voltage gain, the lower voltage, and the

current stresses on power devices can be obtained with

the proposed SAQR-based converter compared

with passive quadruple rectifier-based converter.

The feasibility and effectiveness of the proposed

SAQRs and the derived converter are verified by a

380-V output prototype.

047 A Power Quality Improved

Bridgeless Converter Based

Computer Power Supply

IEEE 2016

Poor power quality, slow dynamic response, high

device stress, harmonic rich, periodically dense, peaky,

distorted input current are the major problems which

are frequently encountered in conventional switched

mode power supplies (SMPSs) used in computers. To

mitigate these problems, it is proposed here to use a

non-isolated bridgeless buck-boost single ended

primary inductance converter (SEPIC) in

discontinuous conduction mode (DCM) at the front

end of an SMPS. The bridgeless SEPIC at the front

end provides stiffly regulated output dc voltage even

under frequent input voltage and load variations. The

output of the front end converter is connected to a half

bridge dc-dc converter for isolation and also for

obtaining different dc voltage levels at the load end

that are needed in a personal computer. Controlling a

single output voltage is able to regulate all the other dc

output voltages as well. The design and simulation of

the proposed power supply are carried out for

obtaining an improved power quality which is verified

through the experimental results.

048 Design and Implementation of a

High Efficiency Multiple Output

Multiple output converters (MOCs) are widely applied

to applications requiring various levels of output

Charger based on the Time

Division Multiple Control

Technique

IEEE 2016

voltages due to their advantages in terms of cost,

volume, and efficiency. However, most of the

conventional MOCs cannot regulate multiple outputs

tightly and they can barely avoid the cross regulation

problem. In this paper, the recently developed Time

Division Multiple Control (TDMC) method, which can

regulate all of the outputs with a high accuracy, is used

for a multiple output battery charger based on the

phase shift full bridge topology to simultaneously

charge three batteries. The proposed charger is able to

charge three different kinds of batteries or three of the

same kind of battery in different state of charges

(SOCs) independently and accurately with the

constant current/constant voltage (CC/CV) charge

method. As a result, the strict ripple specification of a

battery can be satisfied for multiple battery charges

without difficulty. In addition, the proposed charger

exhibits a high efficiency since the soft switching of all

of the switches during the entire charge process can be

guaranteed. The operating principle of the converter

and the design of the controller, including the state-

space average modeling, will be detailed and the

validity of the proposed method is verified through

experiments.

049 Single-Stage AC/DC Single-

Inductor Multiple-Output LED

Drivers

2015 Various ac/dc LED driver topologies have been

proposed to meet the challenges of achieving a

compact, efficient, low-cost, and robust multistring

LED lighting system. These LED drivers typically

employ a two-stage topology to realize the functions

Of ac/dc rectification and independent current control

of each LED string. The choice of having two stage

conversions involves additional hardware components

and a more complicated controller design process.

Such two-stage topologies suffer from a higher system

Cost, increased power loss, and large form factor. In

this paper, a single-stage ac/dc single-inductor

multiple-output LED driver is proposed. It uses only

one single inductor and N + 1 active power switches (N

being the number of LED strings) with reduced

Component count and smaller form factor. The

proposed driver can achieve both functions of ac/dc

rectification with a high power factor and precise

independent current control of each individual

LED string simultaneously. A prototype of an arc/dc

single-inductor triple-output LED driver is

constructed for verification. Experimental

Results corroborate that precise and independent

current regulation of each individual LED string is

achievable with the proposed driver. A power factor of

above 0.99 and a peak efficiency of 89% at 30-W rated

output power are attainable.

050 A Wide Load Range ZVS Push-

Pull DC/DC Converter with

Active-Clamped

IEEE 2016

A new active-clamped zero-voltage-switching (ZVS)

push-pull converter is proposed in this paper.

Compared with the conventional push-pull converter,

one auxiliary switch Q3

and a clamping capacitor Ca

is

added in the primary side of the transformer to recycle

the energy stored in the leakage inductors and clamp

the voltage spike. Owing to the proposed converter

which maintains ZVS of all the three switches from

full load to very light load condition, switching losses

are reduced significantly. The voltage stresses on

switches that can be clamped at the input voltage plus

the clamping capacitor voltage i.e., Vin

+VCa

, are much

less than those of a conventional push-pull converter

that enabling the use of low-voltage, low-performance

and lower cost devices. In addition, the proposed

topology can eliminate the problems of flux-imbalance

existing in the conventional one. Detailed operation,

analysis, design, comparative study and experimental

results for the proposed converter are presented in this

paper. An 800 W prototype was developed in the

laboratory to evaluate and demonstrate the validity of

the converter.

051 A ZVS Pulsewidth Modulation

Full-Bridge Converter With a

Low-RMS-Current Resonant

Auxiliary Circuit

IEEE 2016

This paper presents the description and analysis of

a phase-shift-modulated full-bridge converter with a

novel robust passive low-rms-current resonant

auxiliary circuit for zero-voltage

Switching (ZVS) operation of both the leading and

lagging switch legs. Detailed time-domain analysis

describes the steady-state behavior of the auxiliary

circuit in different operating conditions. An in-depth

comparative study between a fully specified baseline

Converter and the equivalent converter using the

proposed resonant auxiliary circuit is presented. For a

similar peak auxiliary current to ensure ZVS

operation, a minimum of 20% reduction in rms

current is obtained, which decreases the conduction

losses. Key characteristics and design considerations

are also fully discussed. Experimental results from a

750-W prototype confirm the predicted enhancements

using the proposed resonant auxiliary circuit.

052 A ZV-ZCS Electrolytic

Capacitor-LessAC/DC

Isolated LED Driver with

Continous Energy Regulation

IEEE 2016

Conventional AC/DC LED drivers require a large

Energy storage capacitor at the output to provide a

constant current to the LEDs. In order to minimize the

size and cost of the driver circuit, electrolytic

capacitors are conventionally used due to its high

energy density and low cost. However, electrolytic

Capacitors are sensitive to operating temperature and

have much shorter lifetime than the LED

semiconductor devices, which significantly reduces the

overall life time of the LED system. Another drawback

with the current LED drivers is that the presence of

the switching power losses restricts the use of high

Frequency operation, which results in using bulky

passive circuit components in the drivers and

significantly reduces the circuit power efficiency. This

paper proposes a single-stage high power factor LED

driver with almost zero switching losses and without

The electrolytic capacitor. In the proposed circuit,

discontinuous conduction mode (DCM) boost

converter was utilized as a power factor correction

(PFC) circuit, where it was integrated with an

Asymmetrical pulse width modulated (APWM) series

resonant converter to form a single stage power

conversion unit to drive the LEDs. The proposed

circuit is able to achieve zero turn-on and turn-off

switching operation and is able to eliminate the

Conventionally needed electrolytic capacitors by

continuously regulating the DC-link voltage. The

proposed LED driver was simulated and tested on a

12W design example to confirm that an almost unity

power factor and an efficiency of 95% can be achieved

053 Wide ZVS Range Asymmetric

Half-Bridge Converter With

Clamp Switch and Diode

for High Conversion Efficiency

A conventional asymmetrical half-bridge

(AHB) converter is widely used for dc–dc stage in low-

to medium power system. However, since the

asymmetric operation of AHB converter causes the

low efficiency over entire load condition, the

conventional AHB converter is not usually considered

for the candidate of server power system. In order to

overcome the problems of the conventional AHB

converter, a wide zero-voltage-switching (ZVS) range

AHB converter with a clamp switch and a clamp diode

IEEE 2016 is proposed in this paper. The proposed AHB

converter (PAHBC) replaces a low-side clamp diode

with a MOSFET switch and adds an auxiliary

winding, which changes the transformer turns-ratio.

From these modifications and the pulse width-

modulation (PWM) control of clamp switch, the

PAHBC can be designed optimally at nominal input

condition and obtains additional dc gain at hold-up

time condition. These advantages achieve the high

conversion efficiency over the entire load condition.

The operational principle and analysis of the PAHBC

are presented in this paper and verified by a 340–400

V input and 50 V/500 W output laboratory prototype

054 ZVS-ZCS High Voltage Gain

Integrated Boost Converter For

DC Microgrid

IEEE 2016

A non-isolated soft switched integrated boost

converter having high voltage gain is proposed for the

module integrated PV systems, fuel cells and other low

Voltage energy sources. Here a bidirectional boost

converter is integrated with a resonant voltage

quadrupler cell to obtain higher voltage gain. The

auxiliary switch of the converter, which is connected to

the output port acts as an active clamp circuit. Hence

ZVS (zero voltage switching) turn on of the MOSFET

switches are achieved. Coupled inductor’s leakage

energy is recycled to the output port through this

auxiliary switch. In the proposed converter,

all the diodes of the quadrupler cell are turned off with

ZCS (zero current switching). This considerably

reduces the high frequency turn off losses and reverse

recovery losses of the diodes. ZCS turn off of the

diodes also remove the diode voltage ringing caused

due to the interaction of the parasitic capacitance of

the diodes and the leakage inductance of the coupled

inductor. Hence to protect the diodes from the voltage

spikes, snubbers are not required. The voltage stress

on all the MOSFETs and diodes are lower. This helps

to choose switches of low voltage rating (low

RDS(ON)) and thus improve the efficiency. Design and

mathematical analysis of the proposed converter are

made.A 250W prototype of the converter is built to

verify the

performance

055 A CLCL Resonant DC/DC

Converter for Two-Stage LED

Driver System

A CLCL resonant dc/dc converter has been proposed

and analyzed in this paper for two-stage light-emitting

diode (LED) drivers. The circuit performs zero

voltage-switching (ZVS) turn-on and quasi zero

current- switching (ZCS) turn-off. Then, a two-stage

IEEE 2016 system has been designed using a power factor

correction circuit before the proposed converter.

Optimum input impedance angle, dead time, and

components parameters have been achieved after

thoughtful design, thus obtaining good soft-switching

performance and reduced voltage stress. A 100-W

prototype has been realized and tested demonstrating

Its high feasibility and efficiency at full load and

during dimming operations.

056 A Novel LED Drive System

Based on Matrix Rectifier

IEEE 2016

This paper presents a novel LED drive system based

On matrix rectifier. Matrix rectifier is applied to the

LED drive system for the first time as to our

knowledge. The novel LED drive system is composed

of two stages. The first stage is the matrix rectifier,

and the second stage is the multi-port two transistor

Forward converters (TTFC) that share a leg. The

space

Vector modulation strategy of matrix rectifier and the

modulation strategy of multi-port TTFC matched with

rectifier stage are fully studied. In order to maintain

the stability of output current, current PI closed-loop

control is adopted for LED strings. Both simulation

and experiment are carried out to verify the topology

And modulation strategy of the proposed LED drive

system.

057 Three phase converter with

galvanic isolation based on loss-

free resistors for HB-LED

lighting applications

IEEE 2016

This work presents a driver for High-Brightness

Light-Emitting Diodes (HB-LED) in three-phase grids,

which complies with IEC 1000-3-2 Class C

requirements, achieves high Power Factor (PF), low

Total Harmonic Distortion (THD), as well as, the

capability to achieve full dimming while disposing of

the bulk capacitor and having galvanic isolation. The

HB-LED driver is based on the use of six four-port

cells with their inputs connected to the three-phase

network and their outputs connected in parallel. Each

one of these cells is a DC/DC converter operating as a

Loss-Free Resistor (LFR) based on the concept of a

flyback operating in Discontinuous Conduction Mode

(DCM). Moreover, it operates in the full range of the

European three-phase line voltage, which varies

between 380V and 420V, and it supplies an output

voltage of 48V with maximum power of 90W.

058 A Bidirectional Three-Level

LLC Resonant Converter

With PWAM Control

IEEE 2016

This paper proposes a bidirectional three-level LLC

Resonant converter with a new pulse width and

amplitude modulation control method. With different

control signals, it has three different operation modes

with different voltage gains. Therefore, it can achieve

wide voltage gain range by switching among these

Three modes, which is attractive for energy storage

system applications needing wide voltage variation.

The proposed topology operates with constant

switching frequency, which is easy to implement

With digital control, and it can achieve soft switching

for all the switches and diodes in the circuit as a

conventional LLC resonant converter. The

performance of the proposed converter is validated by

the experimental results from a 1-kW prototype with

20 A maximum output current.

059 A New Family of Zero-Voltage-

Transition Nonisolated

Bidirectional Converters With

Simple Auxiliary Circuit

IEEE 2016

In this paper, a new family of zero-voltage transition

(ZVT) bidirectional converters are introduced.

In the proposed converters, soft-switching condition

for all semiconductor elements is provided regardless

of the power flow direction and without any extra

voltage and current stress on the main switches. The

auxiliary circuit is composed of a coupled inductor

with the converter main inductor and two auxiliary

switches. The auxiliary switches benefit from

significantly reduced voltage stress and without

Requiring floating gate drive circuit. Also, by applying

the synchronous rectification to the auxiliary switches

Body diodes, conduction losses of the auxiliary circuit

are reduced. In the auxiliary circuit, the leakage

inductor is used as the resonant inductor and all the

magnetic components are implemented on a single

core which has resulted in significant reduction of the

converter volume. In the proposed converters, the

reverse recovery losses of the converter-rectifying

diodes are completely eliminated and hence, using the

low-speed body diode of the power switch as the

converter-rectifying diode is feasible. The theoretical

analysis for a bidirectional buck and boost converter is

Presented in detail and the validity of the theoretical

analysis is justified using the experimental results of a

250-W prototype converter.

060 Bidirectional Resonant DC–DC

Step-Up Converters for Driving

High-Voltage Actuators in

Mobile Microrobots

Electro active polymer (EAP) actuators have been

investigated to convert electrical energy

intomechanical deformation in autonomous

microrobots. The use of dielectric EAP actuators

IEEE 2016

comes with several challenges to address requirements

such as high excitation voltages, explicit driving

signals, and low conversion efficiency. External bulky

and heavy power sources are used to generate and

provide required excitation voltages. The development

Of a miniature, high voltage gain, and highly efficient

power electronic interface is required to overcome

such challenges and enable autonomous operation of

miniature robots. In this paper, a bidirectional single-

stage resonant dc–dc step-up converter is introduced

and developed to efficiently drive high-voltage EAP

actuators in mobile microrobots. The converter utilizes

resonant capacitors and a coupled inductor as a soft-

switched LC network to step up low input voltage.

High-frequency soft-switching operation owing to LC

resonance allows small footprint of the circuit without

suffering from switching losses, which in turn

increases the efficiency. The circuit is capable of

generating explicit high-voltage actuation signals, with

capability of recovering unused energy from

EAP actuators. A 4-mm × 8-mm, 100-mg, and 600-

mW prototype has been designed and fabricated to

drive an in-plane gap-closing electrostatic inchworm

motor. Experimental validations have been carried out

to verify the circuit’s ability to step up voltage from 2

To 100 V and generate two 1-kHz, 100-V driving

voltages at 2-nF capacitive loads.

061 Bidirectional Single Power-

Conversion DC-AC Converter

with Non-Complementary

Active-Clamp Circuits

IEEE 2016

This paper presents a bidirectional single power-

conversion dc-ac converter with non-complementary

Active-clamp circuits. The proposed converter

comprises a bidirectional flyback converter and an

unfolding bridge. In order to interface the grid with a

low voltage energy storage through only single power-

conversion, the bidirectional flyback converter

transforms the low voltage directly into the folded grid

voltage and regulates the folded grid current. The

proposed converter adopts noncomplementary

operation strategy for the active-clamp circuits. By

using this strategy, the bidrectional flyback converter

not only avoids the voltage spike but also minimizes

the power losses by the circulating energy. Thus,

with single power-conversion and non-complementary

active-clamp circuits, the proposed converter obtains

high power efficiency. To facilitate the bidirectional

single power-conversion, a novel control algorithm is

developed. With this control algorithm, the proposed

converter ensures high grid power quality and

seamless mode transition .The proposed bidirectional

dc-ac converter is theoretically analyzed in detail. The

experimental results based on a 250W prototype are

provided to evaluate its performance

062 High Step-Up/Step-Down Soft-

Switching Bidirectional DC–DC

Converter With Coupled-

Inductor and Voltage Matching

Control for Energy Storage

Systems

IEEE 2016

A soft-switching bidirectional dc–dc converter (BDC)

with a coupled-inductor and a voltage doubler cell

Is proposed for high step-up/step-down voltage

conversion applications. A dual-active half-bridge

(DAHB) converter is integrated into a conventional

buck-boost BDC to extend the voltage gain

dramatically and decrease switch voltage stresses

effectively. The coupled inductor operates not

only as a filter inductor of the buck-boost BDC, but

also as a transformer of the DAHB converter. The

input voltage of the DAHB converter is shared with

the output of the buck-boost BDC. So, PWM control

can be adopted to the buck-boost BDC to ensure that

the voltage on the two sides of the DAHB converter is

always matched. As a result, the circulating current

and conduction losses can be lowered to improve

efficiency. Phase-shift control is adopted to the DAHB

converter to regulate the power flows of the proposed

BDC. Moreover, zero-voltage switching (ZVS) is

achieved for all the active switches to reduce the

switching losses. The operational principles and

characteristics of the proposed BDC are presented in

detail. The analysis and performance have been fully

validated experimentally on a 40–60 V/400 V 1-kW

hardware prototype.

063 A BIDIRECTIONAL SINGLE-

STAGE THREEPHASE

RECTIFIER WITH HIGH-

FREQUENCY

ISOLATION AND POWER

FACTOR

CORRECTION

IEEE 2016

This paper proposes a single-stage three-phase

rectifier with high-frequency isolation, power factor

correction, and bidirectional power flow. The

presented topology is adequate for dc grids (or smart-

grids), telecommunications (telecom) power supplies,

and more recent applications such as electric vehicles.

The converter is based on the three-phase version of

the dual active bridge (DAB) associated with the three-

stateswitching cell (3SSC), whose power flow between

the primary and secondary sides is controlled by the

phase-shift angle. A theoretical analysis is presented

and validated through simulation and experimental.

064 A High-Voltage SiC-Based Boost

PFC for LED Applications

This paper reports a single-stage grid-supplied boost

converter with power factor correction for light-

emitting diode (LED)-applications using Silicon-

Carbide (SiC) and operating at the boundary between

IEEE 2016

continuous and discontinuous conduction modes to

reduce switching losses. The converter is supplied by

a 230 VRMS grid voltage, and attains 1200-V dc at the

output port, where a-spot of 320 LEDs connected in

series is supplied at constant current. The sliding-

mode control theory is employed to analyze the

switching regulator dynamics, assuring the system

stability. The controller is easily implemented by

means of a hysteretic comparator avoiding the risk of

modulator saturation. The converter can operate in a

normal mode, in which all the input current semicycles

are employed, and in a burst mode where only

a fraction of all the current semicycles is used. The

power switch is realized with silicon carbide (SiC)

devices to improve the performance of low-power -grid

-supplied LED-based lighting systems. The

experimental results are in perfect agreement with the

theoretical predictions and demonstrate the feasibility

of the proposed approach.

065 Bumpless Control for Reduced

THD in Power Factor

Correction Circuits

2015 It is well known that power factor correction (PFC)

circuits suffer from two fundamentally different

operating modes over a given AC input cycle. These

two modes, continuous conduction mode (CCM) and

discontinuous conduction mode (DCM), have very

different frequency-response characteristics that can

make control design for PFC circuits challenging. The

problem is exacerbated by attempts to improve

efficiency by dynamically adjusting the PWM

switching frequency based on the load. Adjusting the

PWM frequency based on the load limits controller

bandwidth and restricts dynamic performance. Prior

work has made use of multiple controllers, however,

they have not addressed the discontinuity (bump) that

exists when switching between controllers. In this

paper, bumpless controllers will be synthesized for a

750 watt, semi-bridgeless PFC for the CCMDCM

operating modes.

066 Control of a Single-Stage Three-

Phase Boost Power Factor

Correction Rectifier

Advances in power electronics are enabling More

Electric Aircrafts (MEAs) to replace pneumatic

systems with electrical systems. Active power factor

correction (PFC) rectifiers are used in MEAs to rectify

the output voltage of the three-phase AC-DC boost

converter, while maintaining a unity input power

factor. Many existing control strategies implement

PI compensators, with slow response times, in their

IEEE 2016

voltage and current loops. Alternatively,

computationally expensive nonlinear controllers can

be chosen to generate input currents with high power

factor and low total harmonic distortion (THD), but

they may need to be operated at high switching

frequencies due to relatively slower execution of

control loop. In this work, a novel control strategy is

proposed for a three-phase, singlestage boost-type

rectifier that is capable of tight and fast regulation of

the output voltage, while simultaneously achieving

unity input power factor, without constraining the

operating switching frequency. The proposed control

strategy is implemented, using one voltage-loop PI

controller and a linearized transfer function of duty-

ratio to input current, for inner loop current control.

A 1.5 kW three-phase boost PFC prototype is designed

and developed to validate the proposed control

algorithm. The experimental results show that an

input power factor of 0.992 and a tightly regulated DC

link voltage with 3% ripple can be achieved.

067 Interleaved Digital Power Factor

Correction Based on the Sliding-

Mode Approach

IEEE 2016

This study describes a digitally controlled power

factor correction (PFC) system based on two

interleaved boost converters operating with pulsewidth

modulation (PWM). Both converters are

independently controlled by an inner control loop

Based on a discrete-time sliding-mode (SM) approach

that imposes loss-free resistor (LFR) behavior on each

cell. The switching surface implements an average

current-mode controller so that the power factor (PF)

is high. The SM-based digital controller is designed

to operate at a constant switching frequency so that

the interleaving technique, which is recommended for

ac–dc powerconversion systems higher than 1 kW, can

be readily applied. Anouter loop regulates the output

voltage by means of a discrete-time proportional–

integral (PI) compensator directly obtained from a

discrete-time small-signal model of the ideal sliding

dynamics. The control law proposed has been

validated using numerical simulation and

experimental results in a 2-kW prototype.

068 LCL Filter Design for Three-

phase Two-level Power

Factor Correction using Line

Impedance Stabilization

Network

This paper presents LCL filter design method for

three-phase two-level power factor correction (PFC)

using line impedance stabilization network (LISN). A

straightforward LCL filter design along with variation

in grid impedance is not simply achievable and

inevitably lead to an iterative solution for filter.

IEEE 2016

By introducing of fast power switches for PFC

applications such as silicon-carbide, major current

harmonics around the switching frequency drops in

the region that LISN can actively provide well-defined

impedance for measuring the harmonics (i.e. 9 kHz-

30MHz). Therefore, LISN can be replaced with

unknown grid impedance at high frequency, simplify

the model of the filter, and provide repetitive

measurements. In this paper, all the filter parameters

are derived with analyzing the behavior of the

converter at high frequency with presence of LISN

impedance. The minimum required filter capacitor is

derived using the current ripple behavior of converter-

side inductor. The grid-side inductor is achieved as a

function of LISN impedance to fulfill the grid

regulation. To verify the analyses, an LCL filter is

designed for a 5 kW SiC-based PFC. The simulation

and experimental results support the validity of the

method.

069 New AC–DC Power Factor

Correction Architecture

Suitable for High-Frequency

Operation

IEEE 2016

This paper presents a novel ac–dc power factor

correction (PFC) power conversion architecture for a

singlephase grid interface. The proposed architecture

has significant advantages for achieving high

efficiency, good power factor, and converter

miniaturization, especially in low-to-medium power

applications. The architecture enables twice-line-

frequency energy to be buffered at high voltage with a

large voltage swing, enabling reduction in the energy

buffer capacitor size and the elimination of electrolytic

capacitors. While this architecture can be beneficial

With a variety of converter topologies, it is especially

suited for the system miniaturization by enabling

designs that operate at high frequency (HF, 3–30

MHz). Moreover, we introduce circuit

implementations that provide efficient operation in

this range. The proposed approach is demonstrated

for an LED driver converter operating at a (variable)

HF switching frequency (3–10 MHz) from 120 Vac ,

and supplying a 35Vdc output at up to 30 W. The

prototype converter achieves high efficiency (92%)

and power factor (0.89), and maintains a good

performance over a wide load range. Owing to the

architecture and HF operation, the prototype

achieves a high “box” power density of 50 W/in3

(“displacement” power density of 130 W/in3 ), with

miniaturized inductors, ceramic energy buffer

capacitors, and a small-volume EMI filter.

070 Bridgeless SEPIC PFC

Converter for Low Total

Harmonic Distortion and High

Power Factor

IEEE 2016

There is a need to improve the power quality of the

grid as well as the power factor implied on the grid

due to the nonlinear loads connected to it. A new single

phase bridgeless AC/DC power factor correction

(PFC) topology to improve the power factor as well as

the total harmonic distortion (THD) of the utility grid

is proposed in this research. By eliminating the

input bridge in conventional PFC converters, the

control circuit is simplified; the total harmonics

distortion THD and power factor PF are improved.

The controller operates in multi loop fashion as the

outer control loop calculates the reference current

through innovative filtering and signal processing.

Inner current loop generates PWM switching signals

through the PI controller. Analytical derivation of the

proposed converter is presented in detail. Performance

of the proposed PFC topology is verified for prototype

using PSIM circuit simulations. The experimental

system is developed, and the experimental results

agree with simulation results.

071 Interleaved SEPIC Power

Factor Pre-Regulator Using

Coupled Inductors in

Discontinuous Conduction Mode

with Wide Output Voltage

IEEE 2016

A power factor pre-regulator (PFP) usually serves as

the first stage of an active two-stage AC/DC converters

in a variety of applications including inductive heating

systems, wireless charging systems, and onboard

chargers for plug-in electric vehicles (PEVs).

Conventionally, boost-type PFPs are utilized to

regulate the DC-link voltage at a fixed voltage;

however, a variable DC-link voltage can enhance the

overall efficiency of the converters. In this paper, an

interleaved single-ended primary inductor converter

(SEPIC) with coupled inductors is proposed as the

PFP stage for two-stage AC/DC converters. The

converter is designed to operate in discontinuous

conduction mode (DCM) in order to achieve soft

switching for switches and diodes. The directly

coupled inductors are utilized to reduce the number of

magnetic components and decrease the input current

ripple. A 500W interleaved SEPIC PFP prototype is

designed to verify the benefits of this converter. The

experimental results show that the converter can

maintain high efficiency over a wide range of DC-link

voltage.

072 Reduced Current Stress

Bridgeless Cuk PFC

Converter with New Voltage

Multiplier Circuit

IEEE 2016

In this paper, a bridgeless Cuk derived AC/DC

converter is proposed. The present circuit topology

separates the input PFC current and output voltage-

regulation current, which reduces the switch current

stresses and improves system thermal management

compared to the conventional bridge and bridgeless

Cuk topologies. In addition, the proposed bridgeless

topology has semi-soft switching function of all active

switches to reduce converter switching losses.

Therefore, the switch conduction losses and switching

power losses all can be decreased due to the reduced

current stress and semi-soft switching function. To

understand the proposed Cuk derived converter, the

circuit operation is explained and the steady-state

behavior is analyzed. Finally a prototype system with

DSP TMS320F28335 controller is implemented. Some

simulation and experimental results are offered to

verify the validity of the proposed bridgeless Cuk

derived PFC converter.

073 Single-Stage Bridgeless AC-DC

PFC Converter Using a Lossless

Passive Snubber and Valley-

Switching

IEEE 2016

A single-stag converter using a losslee ss

bripdagsesleivses sAnCub-DbCer PaFnCd

valley-switching is proposed. The proposed converter

is Ibna stehde opnr oap towsoe-ds tacgoen

vberridtegre, letshse bcooonsdt-ufclytbioanc kl

ocsosnevse rtaerre. reduced by removing an input full-

bridge diode rectifier. The boost inductor is designed

to be operated in the discontinuous- conduction mode

for achieving high power factor. In the flyback

module, the couple inductor that provides input-

output electrical isolation for safety is designed to be

operated in the critical- conduction mode for low RMS

current and low turn-on switching loss by using valley-

switching operation. Because of the lossless tshneu

blbeaekr acgirec uiint,d tuhcet voor lteangeer sgpyi

kies orf escwyictclehd i.s Tclhaem psendu,b abnedr

capacitor is used as a DC-bus capacitor, which is

divided idnitroe cttlwy oc ocnadpuacctietdo rtso. tIhne

oadudtpituiot,n a, nsdo tmhee reinmpauitn inpgo

wpeorw eisr is stored in DC-bus capacitor. So, low

voltage rating capacitors can be used as the DC-bus

capacitor and power tarnaanlsyfseirs eifsfi

civeenrcifyie ids iomnp raonv edo.u tTphuet p4r8e

se[Vn]t eda ntdh eo6r0e ti[cWa]l experimental

prototype.

074 A Coupled Inductor Based High

Boost Inverter with Sub–Unity

Voltage source inverter (VSI) cannot provide an

output voltage higher than its input and needs dead–

Turns–Ratio Range

IEEE 2016

time scheme for its switches to prevent DC–link short

circuit due to spurious turn-on of switches by electro–

magnetic interference (EMI). Impedance source

inverters have eliminated these disadvantages by

providing boost functionality with improved EMI

immunity. Coupled inductor based impedance source

inverters provided increased gain at the expense of

increased coupled inductor turns–ratio. In this paper,

a coupled inductor based high gain inverter is

proposed which achieves higher gain by increasing the

coupled inductor turns–ratio (n=n2/n1) within a very

narrow turns–ratio range of 0 ≤ n < 1 which is a major

improvement over the other coupled inductor based

high boost impedance source inverters. The proposed

inverter, named Improved Trans–Current–Fed

Switched Inverter, is described along with its

equivalent operating states and relation between its

input and output variables are derived. The steady–

state inverter waveforms are shown using PSpice

simulations. The operation of the inverter is validated

by the experimental results which show strong

correlation with the theoretical analysis. A 110 V RMS

AC output is obtained from 26 V DC input using a

coupled inductor with turns–ratio of 0.33 to

demonstrate its high boost operation

075 A High Power Density Single-

Phase Inverter Using Stacked

Switched Capacitor Energy

Buffer

IEEE 2016

This paper presents a high power density 2 kW single-

phase inverter, with greater than 50 W/in3 power

density and 90% line-cycle average efficiency. This

performance is achieved through innovations in twice-

line-frequency (120 Hz) energy buffering and high

frequency dc-ac power conversion. The energy

buffering function is performed using an advanced

implementation of the recently proposed stacked

switched capacitor (SSC) energy buffer architecture,

and the dc-ac power conversion is performed using a

soft-switching SiC-FET based converter, with a digital

implementation of variable frequency constant peak

current control.

076 A ZVS Grid-Connected Full-

Bridge Inverter With a Novel

ZVS SPWM Scheme

A zero-voltage switching (ZVS) grid-connected

fullbridge inverter and its modulation schemes are

investigated. A novel sinusoidal pulse width

IEEE 2016

modulation scheme for the ZVS fullbridge inverter

(ZVS SPWM) is proposed in this paper. The ZVS

SPWM is evolved from the double-frequency SPWM

by adding gate drive to the auxiliary switch. The ZVS

condition is analyzed and the circulation loss of the

resonant branch is optimized by adjusting the energy

storage in the resonant inductor. The reverse

recovery of the body-diode of MOSFET is relieved and

ZVS is realized for both main and auxiliary switches.

The filter inductors are significantly reduced with

higher switching frequency. The design guideline of

resonant parameters and the implementation of

ZVS SPWM in DSP controller are introduced. The

ZVS SPWM scheme is verified on a 3-kW inverter

prototype. According to the experimental result, peak

efficiency as 98.8% is achieved.

077 Dual Buck Inverter with Series

Connected Diodes and Single

Inductor

IEEE 2016

In a DC-AC system, some problems may threaten

the reliability of the whole system, such as the shoot

through issue and the failure of reverse recovery.

Some methods are proposed to improve the reliability

of the converters. The dual buck inverters can solve

the above problems without adding dead time but the

dual buck topology has a main drawback of low

magnetic utilization which increases the volume and

weight of the system. This paper firstly summarizes

the traditional dual buck topologies including a kind of

single inductor dual buck inverter which can make full

use of the inductance. Then a method to improve the

reliability of the MOSFET inverter is proposed. A

kind of novel dual buck inverter with series connected

diodes and single inductor is introduced. The novel

inverter retains the dual buck topologies’ advantage of

high reliability and can make full use of the

inductance. Also, compared to the traditional single

inductor dual buck topology, the controlling strategy

of the proposed inverter is simpler. Finally, the

simulation and experimental results verified the

theoretical analysis.

078 Three-Phase Split-Source

Inverter (SSI): Analysis and

Modulation

In several electrical dc–ac power conversions, the ac

output voltage is higher than the input voltage. If a

voltage-source inverter (VSI) is used, then an

additional dc–dc boosting stage is required to

overcome the step-down VSI limitations. Recently,

several impedance source converters are gaining

higher attentions [1], [2], as they are able to provide

buck-boost capability in a single conversion stage. This

IEEE 2016

paper proposes the merging of the boost stage and the

VSI stage in a single stage dc–ac power conversion,

denoted as split-source inverter (SSI). The proposed

topology requires the same number of active switches

of the VSI, three additional diodes, and the same eight

states of a conventional spacevector modulation. It also

shows some merits compared to Z-source inverters,

especially in terms of reduced switch voltage stress for

voltage gains higher than 1.15. This paper presents the

analysis of the SSI and compares different modulation

schemes. Moreover, it presents a modified modulation

scheme to eliminate the low frequency ripple in the

input current and the voltage across the inverter

bridge. The proposed analysis has been verified by

simulation and experimental results on a 2.0-kW

prototype.

079 A Pulsewidth Modulation

Technique for High-Voltage

Gain Operation of Three-Phase

Z-Source Inverters

IEEE 2016

Z-source inverter (ZSI) was recently proposed as

a single-stage buck–boost dc–ac power conversion

topology. It augments voltage boost capability to the

typical voltage buck operation of the conventional

voltage source inverter with enhanced reliability.

However, its boosting capability could be limited;

therefore, it may not suit applications requiring a

highvoltage boosting gain. To enhance the boosting

capability, this paper proposes a new pulsewidth

modulation (PWM) technique to control the

generation of the shoot-through intervals in three-

phase ZSIs. The proposed modulation technique

achieves a reliable high-voltage gain operation without

adding any extra hardware to the ZSI structure, which

preserves its single-stage buck–boost conversion

nature. In this paper, the principle of the proposed

modulation technique is analyzed in detail, and

the comparison of the ZSI performance under the

conventional and the proposed PWM techniques is

given. The simulation and experimental results are

shown to verify the analysis of the proposed concept.

080 Switched-Coupled-Inductor

Quasi-Z-Source Inverter

IEEE 2016

Z-source inverters have become a research hotspot

because of their single-stage buck–boost inversion

ability, and better immunity to EMI noises. However,

their boost gains are limited, because of higher

component-voltage stresses and poor output power

quality, which results from the tradeoff between the

shoot-through interval and the modulation index. To

overcome these drawbacks, a new high-voltage boost

impedance-source inverter called a switched-coupled-

inductor quasi-Z-source inverter (SCL-qZSI) is

proposed,which integrates a switched-capacitor and

a three-winding switched-coupled inductor (SCL) into

a conventional qZSI. The proposed SCL-qZSI adds

only one capacitor and two diodes to a classical qZSI,

and evenwith a turns ratio of 1, it has a stronger

voltage boost-inversion ability than existing high-

voltage boost (q)ZSI topologies. Therefore, compared

with other (q)ZSIs for the same input and output

voltages, the proposed SCL-qZSI utilizes higher

modulation index with lower component-voltage

stresses, has better spectral performance, and has a

lower input inductor current ripple and flux density

swing or, alternately, it can reduce the number of

turns or size of the input inductor. The size of the

coupled inductor and the total number of turns

required for three windings are comparable to those of

a single inductor in (q)ZSIs. To validate its

advantages, analytical, simulation, and experimental

results are also presented.

081 Bidirectional Single Power-

Conversion DC-AC Converter

with Non-Complementary

Active-Clamp Circuits

IEEE 2016

This paper presents a bidirectional single power-

conversion dc-ac converter with non-complementary

active-clamp circuits. The proposed converter

comprises a bidirectional flyback converter and an

unfolding bridge. In order to interface the grid with a

low voltage energy storage through only single power-

conversion, the bidirectional flyback converter

ransforms the low voltage directly into the folded grid

voltage and regulates the folded grid current. The

proposed converter adopts noncomplementary

operation strategy for the active-clamp circuits. By

using this strategy, the bidirectional flyback converter

not only avoids the voltage spike but also minimizes

the power losses by the circulating energy. Thus, with

single power-conversion and non-complementary

active-clamp circuits, the proposed converter obtains

high power efficiency. To facilitate the bidirectional

single power-conversion, a novel control algorithm is

developed. With this control algorithm, the proposed

converter ensures high grid power quality and

seamless mode transition. The proposed bidirectional

dc-ac converter is theoretically analyzed in detail. The

experimental results based on a 250W prototype are

provided to evaluate its performance.

082 High-Efficiency Bidirectional

DAB Inverter Using a Novel

This paper proposes a high-efficiency bidirectional

dual-active-bridge (DAB) inverter using a novel

Hybrid Modulation for Stand-

Alone Power Generating System

With Low Input Voltage

IEEE 2016

hybridmodulation for a stand-alone power generating

system with a lowinput voltage. The proposed DAB

inverter consists of a DAB dc–dc converter and

a synchronous rectifier (SR) for unfolding. The DAB

dc–dc converter transforms the low dc voltage into a

rectified sine wave that pulsates twice the grid

frequency. The rectified sine wave unfolds into the

grid voltage by SR. The proposed hybrid modulation

combines a phase shift control and a variable

frequency control. The variable frequency control

converts the nonlinear function of the phase shift angle

into a linear function and controls the output power.

This leads to a simple closed-loop control for the

sinusoidal current waveform, a low harmonic

distortion, and a high-voltage conversion ratio without

an increase of the transformer turn ratio. Since the

proposed DAB inverter has only a single power

conversion stage, it has a simple structure, high power

density, and low cost. It also has a high efficiency of

94.2% by a zero-voltage switching (ZVS) turn on of

the switches in two full bridges (FBs). The

operation principle of the proposed DAB inverter

using this hybrid modulation is analyzed and verified.

Experimental results for a 1-kW prototype are

obtained to show the performance.

083 Analysis and Design of Modified

Half-Bridge Series-Resonant

Inverter With DC-Link Neutral-

Point-Clamped Cell

IEEE 2016

In this paper, a modified half-bridge (HB) resonant

inverter topology with a dc-link neutral-point-clamped

cell is proposed. A pseudo asymmetrical voltage-

cancellation PWM method and a control strategy are

introduced. The proposed topology can maximize the

inverter output power factor, and minimize variations

in the switching frequency. In addition, most switches

are clamped to half of the dc input voltage at turn-off,

increasing the overall efficiency of the system for a

wide load range. The efficiency of the proposed

inverter is improved up to 7%at light-load conditions

compared with that of the conventional HB inverter.

Informative expressions for performance comparison

between the proposed inverter and its counterpart are

provided. In addition, the losses in the inverter

primary components are analytically analyzed in

detail. For validation, a 120-W prototype is

implemented,and experimental results are presented

084 Hybrid Modulation Scheme for

a High-Frequency AC-Link

Inverter

This paper describes a hybrid modulation scheme for

a high-frequency ac-link (HFACL) multistage inverter

comprising a front-end dc/ac converter, followed by

IEEE 2016

isolation transformers, an ac/pulsating-dc converter,

and a pulsating-dc/ac converter. The hybrid

modulation scheme enables 1) removal of the dc-link

filter evident in conventional fixed dc-link (FDCL)

inverters placed after the ac/pulsating-dc converter

stage and before an end stage voltage source inverter

and 2) significant reduction in switching loss of the

inverter by reducing the high-frequency switching

requirement of the pulsating-dc/ac converter by two-

third yielding higher efficiency, improved voltage

utilization, and reduced current stress. Unlike the

FDCL approach, in the HFACL approach, hybrid

modulation enables the retention of the sine-wave-

modulated switching information at the output of the

ac/pulsating-dc converter rather than filtering it to

yield a fixed dc thereby reducing the high-frequency

switching requirement for the pulsating-dc/ac

converter. Overall, the following is outlined: 1) hybrid

modulation scheme and its uniqueness, 2) operation of

the HFACL inverter using the hybrid modulation

scheme, 3) comparison of the efficiency and losses,

current stress, and harmonic distortion between the

hybrid-modulation-basedHFACL inverter and the

FDCL inverter, and 4) scaled experimental validation.

It is noted that the term hybrid modulation has no

similarity with themodulation scheme for a hybrid

converter (which are conjugation of two types of

converters based on a slowand fast device) reported in

the literature. The term hybrid modulation scheme is

simply chosen because at any giventime only one leg of

the inverter output stage (i.e., pulsating-dc/ac

converter) switch under high frequency, while the

other two legs do not switch. The outlined hybrid

modulation scheme is unlike all reported

discontinuous modulation schemes where the input is

a dc and not a pulsating modulated dc, and at most

only one leg stays on or off permanently in a 60° or

120° cycle.

085 A Family of Five-Level Dual-

Buck Full-Bridge Inverters for

Grid-Tied Applications

Dual-buck inverters feature some attractive merits,

such as no reverse recovery issues of the body diodes

and free of shoot-through. However, since the filter

inductors of dual-buck inverters operate at each half

cycle of the utility grid alternately, the inductor

capacity of dual-buck inverters is twice as much as

H-bridge inverters. Thus, the power density of dual-

buck converters needs to be improved, as well as the

IEEE 2016

conversion efficiency. In this paper, the detailed

derivation process of two five-level full-bridge

topology generation rules are presented and explained.

One is the combination of a conventional three-level

full-bridge inverter, a two-level capacitive voltage

divider, and a neutral point clamped

branch. The other method is to combine a three-level

half-bridge inverter and a two-level half-bridge

inverter. Furthermore, in order to enhance the

reliability of existing five-level DBFBI topologies,

an extended five-level DBFBI topology generation

method is proposed. The two-level half-bridge inverter

is replaced by a two-leveldual-buck half-bridge

inverter; thus, a family of five-level DBFBI

topologies with high reliability is proposed. The

operation modes, modulation methods, and control

strategies of the series-switch five-level DBFBI

topology are analyzed in detail. The power device

losses of the three-level DBFBI topology and five-level

DBFBI topologies, with different switching

frequencies, are calculated and compared. Both the

relationship between the neutral point potential

self-balancing and the modulation index of inverters

are revealed. A universal prototype was built up for

the experimental tests of the three-level DBFBI

topology, the five-level H-bridge inverter topology, and

the existing three five-level DBFBI topologies.

Experimental results have shown that the five-level

DBFBI topologies exhibit higher efficiency than the

five-level H-bridge inverter topology and the three-

level DBFBI topology. As well, the higher power

density has been achieved by the five-level DBFBI

topologies compared with the three-level DBFBI

topology.

086 A New Cascaded Switched-

Capacitor Multilevel Inverter

Based on Improved Series–

Parallel Conversion With Less

Number of Components

IEEE 2016

The aim of this paper is to present a new

structure for switched-capacitor multilevel inverters

(SCMLIs) which can generate a great number of

voltage levels with optimum number of components

for both symmetric and asymmetric values of dc-

voltage sources. The proposed topology consists of a

new switched-capacitor dc/dc converter (SCC) that

has boost ability and can charge capacitors as self-

balancing by using the proposed binary asymmetrical

algorithm and series–parallel conversion of power

supply. The proposed SCC unit is used in new

configuration as a submultilevel inverter (SMLI) and

then, these proposed SMLIs are cascaded together and

create a new cascaded multilevel inverter (MLI)

topology that is able to increase the number of output

voltage levels remarkably without using any full H-

bridge cell and also can pass the reverse current for

inductive loads. In this case, two half-bridge modules

besides two additional switches are employed in each

of SMLI units instead of using a full H-bridge cell that

contribute to reduce the number of involve

components in the current path, value of blocked

voltage, the variety of isolated dc-voltage sources, and

as a result, the overall cost by less number of switches

in comparison with other presented topologies. The

validity of the proposed SCMLI has been carried out

by several simulation and experimental results.

087 A Single DC Source Cascaded

Seven-Level Inverter Integrating

Switched Capacitor Techniques

IEEE 2016

In this paper, a novel cascaded seven-level inverter

topology with a single input source integrating

switched capacitor techniques is presented. Compared

with the traditional cascade multilevel inverter (CMI),

the proposed topology replaces all the separate dc

sources with capacitors, leaving only one H-bridge cell

with a real dc voltage source and only adds two

charging switches. The capacitor charging circuit

contains only power switches, so that the capacitor

charging time is independent of the load. The

capacitor voltage can be controlled at a desired level

without complex voltage control algorithm and only

use the most common carrier phase-shifted sinusoidal

pulse width modulation (CPS-SPWM) strategy. The

operation principle and the charging-discharging

characteristic analysis are discussed in detail. A 1kW

experimental prototype is built and tested to verify the

feasibility and effectiveness of the proposed topology.

088 A Three Phase Hybrid Cascaded

Modular Multilevel Inverter for

Renewable Energy Environment

This paper presents a three phase hybrid cascaded

modular multilevel inverter topology which is derived

from a proposed modified H-bridge (MHB) module.

This topology results in the reduction of number of

power switches, losses, installation area, voltage stress

and converter cost. For renewable energy environment

such as Photovoltaic (PV) connected to the micro-grid

system, it enables the tranformerless operation and

enhances the power quality. This multilevel inverter is

an effective and efficient power electronic interface

IEEE 2016 strategy for renewable energy systems. The basic

operation of single module and the proposed cascaded

hybrid topology is explained. The ability to operate in

both symmetrical and asymmetrical modes is

analyzed. The comparative analysis is done with

classical cascaded H-bridge (CHB) and flying

capacitor (FC) multilevel inverters. The Nearest Level

Control (NLC) method is employed to generate the

gating signals for the power semiconductor switches.

To verify the applicability and performance of the

proposed structure in PV renewable energy

environment, simulation results are carried out by

MATLAB/SIMULINK under both steady state and

dynamic conditions. Experimental results are

presented to validate the simulation results.

089 An Enhanced Single Phase Step-

Up Five-Level Inverter

IEEE 2016

In this letter, an enhanced step-up five-level inverter

is proposed for photovoltaic (PV) systems. Compared

with conventional five-level inverters, the proposed

topology can realize the multilevel inversion with high

step-up output voltage, simple structure and reduced

number of power switches. The operating principle of

the proposed inverter has been analyzed and the

output voltage expression has been derived. In

addition, the comparison with existing topologies of

single phase five-level inverters is presented. Finally,

experimental results validate the performance of

the proposed topology.

090 Novel Three Phase Multi-Level

Inverter Topology with

Symmetrical DC-Voltage

Sources

IEEE 2016

In this paper, a novel three phase modular multilevel

inverter (MMLI) is proposed. The proposed inverter

consists of primary cell and repetitive modular cells

which are connected in series arrangement with the

primary cell. Therefore, the proposed topology is able

to get more output voltages levels number by adding

extra modular cells. Both the sinusoidal pulse width

modulation (SPWM) and staircases modulation are

effectively executed. The proposed inverter is

distinguished by several advantages such as: reduction

in the number of semiconductor power switches,

reduced Dc-voltage sources count, high utilization

factor of the used Dc-voltagem sources, and the control

execution simplicity. Accordingly, them installation

cost and size are reduced. It is simulated using

MATLAB software package-tool. In addition, a

prototype is developed and examined, to verify both

control techniques and performance of the topology.

Moreover, experimental results are provided to

authenticate the simulation results and it show high

similarity with it.

091 Design and Implementation of a

Novel Multilevel DC–AC

Inverter

IEEE 2016

In this paper, a novel multilevel dc–ac inverter is

proposed. The proposed multilevel inverter generates

seven-level ac output voltage with the appropriate gate

signals’ design. Also, the low-pass filter is used to

reduce the total harmonic distortion of the sinusoidal

output voltage. The switching losses and the voltage

stress of power devices can be reduced in the proposed

multilevel inverter. The operating principles of the

proposed inverter and the voltage balancing method of

input capacitors are discussed. Finally, a laboratory

prototype multilevel inverter with 400-V input voltage

and output 220 Vrms/2 kW is implemented. The

multilevel inverter is controlled with sinusoidal pulse-

width modulation (SPWM) by TMS320LF2407 digital

signal processor (DSP). Experimental results show that

the maximum efficiency is 96.9% and the full load

efficiency is 94.6%.

092 A Novel Nine-Level Inverter

Employing One Voltage Source

and Reduced Components

as High Frequency AC Power

Source

IEEE 2016

Increasing demands for power supplies have

contributed to the population of high frequency ac

(HFAC) power distribution system (PDS), and in

order to increase the power capacity, multilevel

inverters (MLIs) frequently serving as the

high-frequency (HF) source-stage have obtained a

prominent development. Existing MLIs commonly use

more than one voltage source or a great number of

power devices to enlarge the level numbers, and HF

modulation (HFM) methods are usually adopted to

decrease the total harmonic distortion (THD). All of

these have increased the complexity and decreased the

efficiency for the conversion from dc to HF ac. In this

paper, a nine-level inverter employing only one input

source and fewer components is proposed for HFAC

PDS. It makes full use of the conversion of series and

parallel connections of one voltage source and two

capacitors to realize nine output levels, thus lower

THD can be obtained without HFM methods. The

voltage stress on power devices is relatively relieved,

which has broadened its range of applications as well.

Moreover, proposed nine-level inverter is equipped

with the inherent self-voltage balancing ability, thus

the modulation algorithm gets simplified. The circuit

structure, modulation method, capacitor calculation,

loss analysis and performance comparisons are

presented in this paper, and all the superior

performances of proposed nine-level inverter are

verified by simulation and experimental prototypes

with rated output power of 200W. The accordance of

theoretical analysis, simulation and experimental

results confirms the feasibility of proposed nine-level

inverter.

093 A Performance Investigation of

a Four-Switch Three-Phase

Inverter-Fed IM Drives at Low

Speeds Using Fuzzy Logic and

PI Controllers

IEEE 2016

This paper presents a speed controller using a fuzzy-

logic controller (FLC) for indirect field oriented

control (IFOC) of induction motor (IM) drives fed by a

four-switch three-phase (FSTP) inverter. In the

proposed approach, the IM drive system is fed by

FSTP inverter instead of the traditional six-switch

three-phase (SSTP) inverter for a cost-effective low

power applications. The proposed FLC improves

dynamic responses and, it is also designed with

reduced computation burden. The complete IFOC

scheme incorporating the FLC for IM drives fed by

the proposed FSTP inverter is built in

Matlab/Simulink and, it is also experimentally

implemented in real-time using a DSP-DS1103 control

board for a prototype 1.1 kW IM. The dynamic

performance, robustness, and insensitivity of the

proposed FLC with FSTP inverter fed IM drive is

examined and compared to a traditional PI controller

under speed tracking, load disturbances, and

parameters variation, particularly at low speeds. It is

found that the proposed FLC is more robust than the

PI controller under load disturbances, and parameters

variation. Moreover, the proposed FSTP IM drive is

comparable with a traditional SSTP IM drive,

considering its good dynamic performance, cost

reduction and low THD.

094 A Systematic Power-Quality

Assessment and Harmonic Filter

Design Methodology for

Variable-Frequency Drive

Application in Marine Vessels

Inmaritime industry, high fuel costs encourage use of

variable-frequency drives (VFDs) for energy-saving

applications. However, introduction of such nonlinear

loads in the vessel’s power distribution network

induces harmonics, which can lead to potential risks if

are not predicted and controlled. In this paper, a

systematic power-quality assessment and monitoring

IEEE 2016

methodology is proposed to calculate VFD

contribution to voltage distortion at the point of

common coupling (PCC), considering the source

short-circuit capacity and the existing vessel’s power

system harmonics. According to voltage harmonic

distortion limits set by marine classification societies,

design and sizing of appropriate harmonic attenuation

filters is made, including ac and dc chokes and

frequency-tuned passive filter options. The

effectiveness of the proposed power-quality analyzing

procedure is evaluated through a real practical

example, which includes harmonic filter design

for VFD retrofit application to fan and pump motors

that operate constantly during sea-going operation in a

typical tanker vessel. Power-quality field

measurements obtained through a harmonic

monitoring platform implemented on board verify that

total voltage harmonic distortion and individual

voltage harmonics at PCC are maintained below 5%

and 3%, respectively, showing that design complies

with relevant marine harmonic standards even in

the worst operating case.

095 BLDC Motor Driven Solar PV

Array Fed Water Pumping

System Employing Zeta

Converter

IEEE 2016

This paper proposes a solar photovoltaic (SPV)

array fed water pumping system utilizing a zeta

converter as an intermediate DC-DC converter in

order to extract the maximum available power from

the SPV array. Controlling the zeta converter in an

intelligent manner through the incremental

conductance maximum power point tracking (INC-

MPPT) algorithm offers the soft starting of the

brushless DC (BLDC) motor employed to drive a

centrifugal water pump coupled to its shaft. Soft

starting i.e. the reduced current starting inhibits the

harmful effect of the high starting current on the

windings of the BLDC motor. A fundamental

frequency switching of the voltage source inverter

(VSI) is accomplished by the electronic commutation

of the BLDC motor, thereby avoiding the VSI

losses occurred owing to the high frequency switching.

A new design approach for the low valued DC link

capacitor of VSI is proposed. The proposed water

pumping system is designed and modeled such that the

performance is not affected even under the dynamic

conditions. Suitability of the proposed system under

dynamic conditions is demonstrated by the simulation

results using MATLAB/Simulink software.

096 Commutation Torque Ripple

Reduction Strategy of Z-Source

Inverter Fed Brushless DC

Motor

IEEE 2016

Based on the Z-source inverter, this paper proposes

a novel commutation torque ripple reduction strategy

for brushless DC motor (BLDCM). The proposed

strategy employs the same modulation mode in both

the normal conduction period and the commutation

period, and the commutation torque ripple is reduced

by regulating the shoot-through vector and active

vector duty cycles. The proposed detection method

acquires the end point of commutation by comparing

the clamped terminal voltages with reference zero

level, and the signal-noise-ratio of the detection is

improved by avoiding the attenuation of the terminal

voltages. Furthermore, a certain pulse width of the

shoot-through vector can not only reduce the

commutation torque ripple but also provide a new

opportunity to detect the end point of commutation.

Moreover, Z-source inverter provides the buck–boost

ability for BLDCM drive system, then the dc voltage

utilization can be improved, and the safety of the drive

system can also be improved. In addition, this paper

analyzes the terminal voltages during each vector. The

experimental results verify the correctness of the

theories and the effectiveness of the proposed

approach.

097 Position Sensorless Control

Without Phase Shifter for High-

Speed BLDC Motors With Low

Inductance and Nonideal Back

EMF

IEEE 2016

This paper presents a novel method for position

sensorless control of high-speed brushless DC motors

with low inductance and nonideal back electromotive

force (EMF) in order to improve the reliability of the

motor system of a magnetically suspended control

moment gyro for space application. The commutation

angle error of the traditional line-to-line voltage zero-

crossing points detection method is analyzed. Based on

the characteristics measurement of the nonideal back

EMF, a two-stage commutation error

compensationmethod is proposed to achieve the high-

reliable and high-accurate commutation in the

operating speed region of the proposed sensorless

control process. The commutation angle error is

compensated by the transformative line voltages, the

hysteresis comparators, and the appropriate design of

the low-pass filters in the low-speed and high-speed

region, respectively. Highprecision commutations are

achieved especially in the high-speed region to

decrease the motor loss in steady state. The simulated

and experimental results showthat the proposed

method can achieve an effective compensation effect in

the whole operating speed region.

098 Single-Phase Grid Connected

Motor Drive System with DC-

link Shunt Compensator and

Small DC-link Capacitor

IEEE 2016

The single-phase diode rectifier system with small

DC-link capacitor shows wide diode conduction time

and it improves the grid current harmonics. By

shaping the output power, the system meets the grid

current harmonics regulation without any power

factor corrector or grid filter inductor. However, the

system has torque ripple and suffers efficiency

degradation due to the insufficient DC-link voltage. To

solve this problem, this paper proposes the DC-link

shunt compensator (DSC) for small DC-link capacitor

systems. DSC is located on DC-node parallel and

operates as the voltage source, improving the system

performances. This circuit helps the grid current-

shaping control during grid-connection time, and

reduces the flux-weakening current by supplying the

energy to the motor during grid-disconnection time.

This paper presents a power control method and the

design guideline of DSC. The feasibility of DSC is

verified by simulation and experimental results.

099 Single-Phase Input Variable-

Speed AC Motor System

Based on an Electrolytic

Capacitor-Less Single-Stage

Boost Three-Phase Inverter

IEEE 2016

This paper presents a single-phase to three-phase

adjustable-speed drive (ASD) system, which consists of

a diode rectifier and a single-stage boost inverter

without electrolytic capacitors (E-caps). The system

has no shoot-through issues and gains high reliability

due to the shoot-through zero-state regulation method.

By using electrolytic capacitors-less topology, the

lifetime can be greatly increased. By properly

designing the tapping position of the inductor, the

system has a high boost-inversion gain and can ride

through grid voltage sags. By using the proposed

harmonic injection method, the system can realize

high input power factor and small dc-link ripple

voltage, simultaneously. Experimental results of the

electrolytic capacitors-less single-stage boost inverter

(E-caps-less SSBI) based single-phase to three-phase

ASD system are obtained to verify the actual

performances.

100 Switching-Gain Adaptation

Current Control for Brushless

DC Motors

In this paper, a current control scheme with

switching-gain adaptation is proposed for brushless

DC motors. The scheme includes two components,

namely a continuous control component and a

switching control component. The continuous control

component is employed with model reference adaptive

control (MRAC) to approximate the parametric

IEEE 2016

uncertainties, and the switching control component is

used with integral sliding-mode control (ISMC) to

eliminate the general disturbance caused by both the

approximation errors and the unstructured

uncertainties. Due to the variation in general

disturbance in different operating conditions, a

switching-gain adaptation method based on the

unknown disturbance estimation isproposed, which

improves the transient performance of the current

controller and eliminates the high-frequency noise

of current caused by chattering. Finally, the

effectiveness of the proposed method is verified by

experimental results.

IEEE 2015 PROJECTS

CODE. NO PROJECT TITLES YEAR

1.POWER SYSTEMS

POWER QUALITY IMPROVEMENT, REACTIVE & HARMONIC

COMPENSATION

001 New Control of PV Solar Farm as STATCOM (PV-STATCOM) for

Increasing Grid Power Transmission Limits During Night and Day

2015

002 An Adaptive Power Oscillation Damping Controller by STATCOM

With Energy Storage

2015

003 A New Control Strategy for Distributed Static Compensators

Considering Transmission Reactive Flow Constraints

2015

004 A Voltage-Controlled DSTATCOM for Power-Quality Improvement 2014

005 An Improved Hybrid DSTATCOM Topology to Compensate Reactive

and Nonlinear Loads

2014

006 The Transformerless Single-Phase Universal Active Power Filter for

Harmonic and Reactive Power Compensation

2014

007 An Enhanced Voltage Sag Compensation Scheme for Dynamic Voltage

Restorer

2015

008 An Improved iUPQC Controller to Provide Additional Grid-Voltage

Regulation as a STATCOM

2015

009 A Grid-Connected Dual Voltage Source Inverter With Power Quality

Improvement Features

2015

010 Transformerless Hybrid Power Filter Based on a Six Switch Two-Leg

Inverter for Improved Harmonic Compensation Performance

2015

011 A New Railway Power Flow Control System Coupled

With Asymmetric Double LC Branches

2015

012 Analysis of DC Link Operation Voltage of a Hybrid Railway Power

Quality Conditioner and its PQ Compensation Capability in High

Speed Co-phase Traction Power Supply

2015

013 A Systematic Approach to Hybrid Railway Power Conditioner Design

With Harmonic Compensation for High-Speed Railway

2015

2.RENEWABLE ENERGY

A) WIND ENERGY APPLICATION

014 High-Gain Resonant Switched-Capacitor Cell-Based DC/DC Converter

for Offshore Wind Energy Systems

2015

015 DC Microgrid for Wind and Solar Power Integration

2014

B) SOLAR ENERGY APPLICATION

016 A Novel High Step-up DC/DC Converter Based on Integrating Coupled

Inductor and Switched-Capacitor Techniques for Renewable Energy

Applications

2015

017 Hybrid Transformer ZVS/ZCS DC–DC Converter With Optimized

Magnetics and Improved Power Devices Utilization for Photovoltaic

Module Applications

2015

018 Performance of Medium-Voltage DC-Bus PV System Architecture

Utilizing High-Gain DC–DC Converter

2015

019 A Single Stage CCM Zeta Microinverter for Solar Photovoltaic AC

Module

2015

020 Topology Review and Derivation Methodology of Single-Phase

Transformerless Photovoltaic Inverters for Leakage Current

Suppression

2015

021 A High Efficiency Flyback Micro-inverter With a New Adaptive

Snubber for Photovoltaic Applications

2015

022 High Step-Up Converter With Three-Winding Coupled Inductor for

Fuel Cell Energy Source Applications

2015

023 Optimized Operation of Current-Fed Dual Active Bridge DC-DC

Converter for PV Applications

2015

024 Online Variable Topology-Type Photovoltaic Grid-Connected Inverter 2015

3.GRID CONNECTED SYSTEMS

025 An Enhanced Islanding Microgrid Reactive Power, Imbalance Power,

and Harmonic Power Sharing Scheme

2015

026 A Novel Integrated Power Quality Controller for Microgrid 2015

027 Power Control in AC Isolated Microgrids With Renewable Energy

Sources and Energy Storage Systems

2015

4.VEHICULAR APPLICATIONS

028 General Analysis and Design Guideline for a Battery Buffer System

With DC/DC Converter and EDLC for Electric Vehicles and its

Influence on Efficiency

2015

029 Dual Active Bridge-Based Battery Charger for Plug-in Hybrid Electric

Vehicle with Charging Current Containing Low Frequency Ripple

2015

030 Reduced-Capacity Smart Charger for Electric Vehicles on Single-Phase

Three-Wire Distribution Feeders With Reactive Power Control

2015

031 A Non isolated Multi input Multi output DC–DC Boost

Converter for Electric Vehicle Applications

2015

032 New Interleaved Current-Fed Resonant Converter With Significantly

Reduced High Current Side Output Filter for EV and HEV

Applications

2015

5.AC AND DC DRIVES

033 PFC Cuk Converter-Fed BLDC Motor Drive 2015

034 Variable-Form Carrier-Based PWM for Boost-Voltage Motor Driver

With a Charge-Pump Circuit

2015

035 Sensorless Drive for High-Speed Brushless DC Motor Based on the

Virtual Neutral Voltage

2015

036 Independent Control of Two Permanent-Magnet Synchronous Motors

Fed by a Four-Leg Inverter

2015

037 Online Inverter Fault Diagnosis of Buck-Converter BLDC Motor

Combinations

2015

038 A Unity Power Factor Bridgeless Isolated Cuk Converter-Fed Brushless

DC Motor Drive

2015

6.BIDIRECTIONAL CONVERTER

039 A Zero-Voltage-Transition Bidirectional DC/DC Converter 2015

040 Steady-State Analysis of a ZVS Bidirectional Isolated Three Phase DC-

DC Converter Using Dual Phase-Shift Control with Variable Duty

Cycle

2015

041 Novel High-Conversion-Ratio High-Efficiency Isolated Bidirectional

DC–DC Converter

2015

042 DC–DC Converter for Dual-Voltage Automotive Systems Based on

Bidirectional Hybrid Switched-Capacitor Architectures

2015

043 A Novel PWM High Voltage Conversion Ratio Bi-Directional Three-

Phase DC/DC Converter with Y-Δ Connected Transformer

2015

044 Performance Analysis of Bi-directional DC-DC Converters for Electric

Vehicles

2015

7.LED LIGHTING APPLICATIONS

045 Offline Soft-Switched LED Driver Based on an Integrated Bridgeless

Boost–Asymmetrical Half-Bridge Converter

2015

046 A Novel Control Scheme of Quasi-Resonant Valley-Switching for High-

Power-Factor AC-to-DC LED Drivers

2015

047 A Novel Wall-Switched Step-Dimming Concept in LED Lighting

Systems using PFC Zeta Converter

2015

048 Analysis and Design of Single-Switch Forward-Flyback Two-Channel

LED Driver with Resonant-Blocking Capacitor

2015

8.POWER FACTOR CORRECTION CONVERTER

049 Bridgeless PFC-Modified SEPIC Rectifier With Extended Gain for

Universal Input Voltage Applications

2015

050 A Three-Level Quasi-Two-Stage Single-Phase PFC Converter with

Flexible Output Voltage and Improved Conversion Efficiency

2015

051 Front-End Converter With Integrated PFC and DC–DC Functions for

a Fuel Cell UPS With DSP-Based Control

2015

052 Loss-Free Resistor-Based Power Factor Correction Using a Semi-

Bridgeless Boost Rectifier in Sliding-Mode Control

2015

053 Power Factor Corrected Zeta Converter Based Improved Power

Quality Switched Mode Power Supply

2015

054 A New Interleaved Three-Phase Single-Stage PFC AC–DC Converter

With Flying Capacitor

2015

9.RESONANT CONVERTER/INVERTER

055 Hybrid Phase-Shift-Controlled Three-Level and LLC DC–DC

Converter With Active Connection at the Secondary Side

2015

056 Analysis and Design of LLC Resonant Converters With Capacitor–

Diode Clamp Current Limiting

2015

057 A Secondary-Side Phase-Shift-Controlled LLC Resonant Converter

With Reduced Conduction Loss at Normal Operation for Hold-Up

Time Compensation Application

2015

058 Optimal Design Methodology for LLC Resonant Converter in Battery

Charging Applications Based on Time-Weighted Average Efficiency

2015

059 Analytical Model of the Half-Bridge Series Resonant

Inverter for Improved Power Conversion Efficiency and Performance

2015

060 Multi-MOSFET-Based Series Resonant Inverter for Improved

Efficiency and Power Density Induction Heating Applications

2014

10.HIGH VOLTAGE

A)INTERLEAVED CONVERTERS

061 A High Gain Input-Parallel Output-Series DC/DC Converter With

Dual Coupled Inductors

2015

062 Bidirectional PWM Converter Integrating Cell Voltage Equalizer Using

Series-Resonant Voltage Multiplier for Series-Connected Energy

Storage Cells

2015

063 Multicell Switched-Inductor/Switched-Capacitor Combined Active-

Network Converters

2015

064 Reliability Evaluation of Conventional and Interleaved DC–DC Boost

Converters

2015

B)SWITCHED CAPACITOR BASED CONVERTERS

065 A Novel Switched-Coupled-Inductor DC–DC Step-Up Converter and

Its Derivatives

2015

066 Ripple Minimization Through Harmonic Elimination in Asymmetric

Interleaved Multiphase dc-dc Converters

2015

067 Analysis of the Interleaved Isolated Boost Converter With Coupled

Inductors

2015

068 High Step-Up Interleaved Forward-Flyback Boost Converter With

Three-Winding Coupled Inductors

2015

069 A Novel Transformer-less Interleaved Four-Phase Step-down DC

Converter with Low Switch Voltage Stress and Automatic Uniform

Current Sharing Characteristics

2015

070 Nonisolated High Step-Up DC–DC Converters Adopting Switched-

Capacitor Cell

2015

071 A Family of High-Voltage Gain Single-Phase Hybrid

Switched-Capacitor PFC Rectifiers

2015

072 A High-Efficiency Resonant Switched Capacitor Converter With

Continuous Conversion Ratio

2015

073 A Cascade Point of Load DC-DC Converter with a Novel Phase Shifted

Switched Capacitor Converter Output Stage

2015

074 Modeling Approaches for DC–DC Converters With Switched

Capacitors

2015

11.ZVS, ZCS (SOFT SWITCHING) CONVERTERS

075 Resonance Analysis and Soft-Switching Design of Isolated Boost

Converter With Coupled Inductors for Vehicle Inverter Application

2015

076 An Adaptive ZVS Full-Bridge DC–DC Converter With Reduced

Conduction Losses and Frequency Variation Range

2015

077 An Integrated High-Power-Factor Converter with ZVS Transition 2015

078 A Novel Load Adaptive ZVS Auxiliary Circuit for PWM Three-Level

DC–DC Converters

2015

079 Hybrid Modulated Extended Secondary Universal Current-Fed ZVS

Converter for Wide Voltage Range: Analysis, Design, and Experimental

Results

2015

080 Two-Stage Power Conversion Architecture Suitable

for Wide Range Input Voltage

2015

081 Naturally Clamped Zero-Current Commutated Soft-Switching

Current-Fed Push–Pull DC/DC Converter: Analysis, Design, and

Experimental Results

2015

082 A Soft-Switched Asymmetric Flying Capacitor Boost Converter with

Synchronous Rectification

2015

12.MULTIPORT CONVERTER

083 A Nonisolated Three-Port DC–DC Converter and Three-Domain

Control Method for PV-Battery Power Systems

2015

084 A Power Decoupling Method Based on Four-Switch Three-Port

DC/DC/AC Converter in DC Microgrid

2015

085 Three-Port DC–DC Converter for Stand-Alone Photovoltaic Systems 2015

086 A Family of Multiport Buck–Boost Converters Based on DC-Link-

Inductors (DLIs)

2015

087 An Isolated Three-Port Bidirectional DC-DC Converter for

Photovoltaic Systems with Energy Storage

2015

13.MULTIPLE OUTPUT CONVERTER

088 A High Step-Down Multiple Output Converter With Wide Input

Voltage Range Based on Quasi Two-Stage Architecture and Dual-

Output LLC Resonant Converter

2015

089 Single-Inductor Dual-Output Buck–Boost Power Factor Correction

Converter

2015

14.AC TO AC CONVERTER

090 A Bridgeless BHB ZVS-PWM AC-AC Converter for High-Frequency

Induction Heating Applications

2015

091 Novel Single-Phase PWM AC–AC Converters Solving Commutation

Problem Using Switching Cell Structure and Coupled Inductor

2015

092 Soft-Switching AC-Link Three-Phase AC–AC Buck–Boost Converter 2015

093 Ultra sparse AC-Link Converters 2015

15.INVERTER & MULTILEVEL INVERTER

094 Discontinuous Modulation Scheme for a Differential-Mode Cuk

Inverter

2015

095 A High-Efficiency MOSFET Transformerless Inverter for Nonisolated

Microinverter Applications

2015

096 A Multilevel Energy Buffer and Voltage Modulator for Grid-Interfaced

Microinverters

2015

097 Extended Boost Active-Switched-Capacitor/ Switched-Inductor Quasi-

Z-Source Inverters

2015

098 Grid-Connected Forward Microinverter With Primary-Parallel

Secondary-Series Transformer

2015

099 Minimization of the DC Component in Transformerless Three-Phase

Grid-Connected Photovoltaic Inverters

2015

100 Single Inductor Dual Buck Full-Bridge Inverter 2015

101 A Single-Phase Cascaded Multilevel Inverter Based on a New Basic

Unit With Reduced Number of Power Switches

2015

TECHNICAL COURSE OFFERINGS

Courses Embedded System, PCB Designing, MATLAB (DSP ,DIP , SIMULINK ,DAP,DVP), Networking, Network Security, Android Application Development, Electronic Circuit Creation and Debugging

Classes Weekend and Holidays

Duration 6 Month (60 Hours) Fee (Others) Rs 8750

Offerings Complete Study Material, Training, Certifications,Journal Publication Support and Placement Support

Batch Starts 6th Sep 15 and 27th September 2015 (2 Batches)

Short Term Courses

Courses Embedded System, PCB Designing, MATLAB (DSP ,DIP , SIMULINK ,DAP,DVP), Networking, Network Security, Android Application Development, Electronic Circuit Creation and Debugging

Classes Weekend and Holidays

Duration 2 Month (20 Hours)

Fee (Others) Rs 6750.

Offerings Complete Study Material, Training, Certifications ,SDK,Journal Publication Support

Batch Starts 6th Sep 15 and 27th September 2015 (2 Batches)