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Motorola Embedded Motion Control

3-PhaseSwitched Reluctance

High-VoltagePower Stage

User’s Manual

For More Information On This Product,

Go to: www.freescale.com

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Important Notice to Users

While every effort has been made to ensure the accuracy of all information in this document, Motorola assumes no liability to any party for any loss or damage caused by errors or omissions or by statements of any kind in this document, its updates, supplements, or special editions, whether such errors are omissions or statements resulting from negligence, accident, or any other cause. Motorola further assumes no liability arising out of the application or use of any information, product, or system described herein: nor any liability for incidental or consequential damages arising from the use of this document. Motorola disclaims all warranties regarding the information contained herein, whether expressed, implied, or statutory, including implied warranties of merchantability or fitness for a particular purpose. Motorola makes no representation that the interconnection of products in the manner described herein will not infringe on existing or future patent rights, nor do the descriptions contained herein imply the granting or license to make, use or sell equipment constructed in accordance with this description.

Trademarks

This document includes these trademarks:

Motorola and the Motorola logo are registered trademarks of Motorola, Inc.

Motorola, Inc., is an Equal Opportunity / Affirmative Action Employer.

© Motorola, Inc., 2000; All Rights Reserved

User’s Manual 3-Phase Switched Reluctance High-Voltage Power Stage

2 MOTOROLA For More Information On This Product,


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User’s Manual — 3-Phase Switched Reluctance High-Voltage Power Stage

List of Sections

Section 1. Introduction and Setup. . . . . . . . . . . . . . . . . .11

Section 2. Operational Description . . . . . . . . . . . . . . . . .19

Section 3. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . .25

Section 4. Schematics and Parts List . . . . . . . . . . . . . . .31

Section 5. Design Considerations . . . . . . . . . . . . . . . . . .45

3-Phase Switched Reluctance High-Voltage Power Stage User’s Manual

MOTOROLA List of Sections 3 For More Information On This Product,


List of Sections

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4 List of Sections MOTOROLA For More Information On This Product,


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Table of Contents

Section 1. Introduction and Setup

1.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.3 About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.4 Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.5 Setup Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Section 2. Operational Description

2.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.4 Modification for 1/2 and 3/4 Horsepower . . . . . . . . . . . . . . . . . . . . . 22

2.5 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Section 3. Pin Descriptions

3.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3 Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.1 40-Pin Ribbon Connector J14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.2 Power Connectors J11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.3 External Brake Connectors J12 . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.4 Motor Output Connector J13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30


MOTOROLA Table of Contents 5 For More Information On This Product,


Table of Contents

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Section 4. Schematics and Parts List

4.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.2 Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.3 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.4 Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Section 5. Design Considerations

5.1 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.2 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.3 Phase Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.4 Bus Voltage and Current Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.5 Cycle-by-Cycle Current Limiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.6 Temperature Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.7 Phase Current Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

5.8 Brake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

5.9 Power Factor Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55


6 Table of Contents MOTOROLA For More Information On This Product,


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List of Figures

Figure Title Page

1-1 Systems’ Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121-2 3-Phase Switched Reluctance High-Voltage Power Stage . . . . . . . . . 131-3 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151-4 PFC Jumper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2-1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3-1 40-Pin Ribbon Connector J14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4-1 3-Phase HR High-Voltage Power Stage Overview . . . . . . . . . . . . . . 334-2 Gate Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344-3 3-Phase Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354-4 Current and Temperature Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . 364-5 Power Factor Correction and Brake Gage Drive . . . . . . . . . . . . . . . . 374-6 Identification Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 384-7 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5-1 Phase A Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 465-2 Bus Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495-3 Cycle-by-Cycle Current Limiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 505-4 Temperature Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515-5 Phase A Current Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535-6 Brake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 545-7 PFC Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555-8 PFC Zero Crossing Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56


MOTOROLA List of Figures 7 For More Information On This Product,


List of Figures

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List of Tables

Table Title Page

2-1 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212-2 Resistor Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222-3 JP801 Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222-4 Fuse Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3-1 Connector J14 Signal Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4-1 Power Substrate Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404-2 Printed Circuit Board Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40


MOTOROLA List of Tables 9 For More Information On This Product,


List of Tables

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10 List of Tables MOTOROLA For More Information On This Product,


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Section 1. Introduction and Setup

1.1 Contents

1.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.3 About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.4 Warnings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.5 Setup Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.2 Introduction

Motorola’s 3-phase, switched reluctance high-voltage power stage (HV SR power stage) is a 115/230 volt, 180 watt (1/4 horsepower), off-line power stage that is an integral part of Motorola’s embedded motion control series of development tools. The HV SR power stage is supplied in kit number ECPWRHiVSR.

In combination with one of the Embedded Motion Control series control boards and an Embedded Motion Control series optoisolation board, it provides a ready made software development platform for fractional horsepower off-line switched reluctance motors. Feedback signals are provided that allow control with a wide variety of algorithms. In addition, the HV SR power stage includes an active power factor correction (PFC) circuit that facilitates development of power factor correction algorithms.

An illustration of the systems architecture is shown in Figure 1-1. A line drawing appears in Figure 1-2.


MOTOROLA Introduction and Setup 11 For More Information On This Product,


Introduction and Setup

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Features of the HV SR power stage are:

• 1-phase bridge rectifier

• Power factor switch and diode

• dc-bus brake IGBT and brake resistors

• 3-phase bridge inverter (6-IGBT’s)

• Individual phase and dc bus current sensing shunts with Kelvin connections

• Power stage temperature sensing diodes

• IGBT gate drivers

• Current and temperature signal conditioning

• Board identification processor (MC68HC705JJ7)

• Low voltage on-board power supplies

• Cooling fans

Figure 1-1. Systems’ Configurations

CONTROL BOARD

MOTOR

WORKSTATION

EMULATOR DSP EVM BOARD

MOTOR

WORKSTATION

b) 56800 DSPa) MICROCONTROLLER

OPTOISOLATIONBOARD

HIGH-VOLTAGEPOWER STAGE

HIGH-VOLTAGEPOWER STAGE

OPTOISOLATIONBOARD


12 Introduction and Setup MOTOROLA For More Information On This Product,


Introduction and SetupAbout this Manual

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Figure 1-2. 3-Phase Switched ReluctanceHigh-Voltage Power Stage

1.3 About this Manual

Key items can be found in the following locations in this manual:

• Setup instructions are found in 1.5 Setup Guide.

• Schematics are found in Section 4. Schematics and Parts List.

• Pin assignments for 40-pin connector J14 are shown in Figure 3-1.

• A pin-by-pin description of input and output signals is contained in 3.3 Signal Descriptions.

• For those interested in the reference design aspects of the board’s circuitry, a description is provided in Section 5. Design Considerations.





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1.4 Warnings

This development tool set operates in an environment that includes dangerous voltages and rotating machinery. To facilitate safe operation, input power for the HV AC power stage should come from a DC laboratory power supply, unless power factor correction is specifically being investigated.

An isolation transformer should be used when operating off an ac power line. If an isolation transformer is not used, power stage grounds and oscilloscope grounds are at different potentials, unless the oscilloscope is floating.

NOTE: Because the probe grounds, it is subjected to dangerous voltages in the case of a floated oscilloscope.

The user should be aware that:

• Before moving scope probes, making connections, etc., it is generally advisable to power down the motor supply.

• When high voltage is applied, using only one hand for operating the test setup minimizes the possibility of electrical shock.

• Operation in lab setups that have grounded tables and/or chairs should be avoided.

• Wearing safety glasses, avoiding ties and jewelry, using shields, and operation by personnel trained in high voltage lab techniques are advisable.

• Power transistors, the PFC coil, and motor can reach temperatures hot enough to cause burns.

• When powering down; due to storage in the bus capacitors, dangerous voltages are present until the power-on LED is off.




Introduction and SetupSetup Guide

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1.5 Setup Guide

Setup and connections are very straightforward. The HV SR power stage connects to an embedded motion control optoisolation board via a 40-pin ribbon cable and can be powered either by a 140-volt to 230-volt dc power supply or with line voltage. For both safety reasons and ease of making measurements, it is strongly recommended that a dc supply is used, unless power factor correction is specifically being investigated. The power supply should be current limited to under 4 amps. Figure 1-3 depicts a completed setup.

A step-by-step setup procedure is described as:

1. Plug one end of the 40-pin ribbon cable that comes with the optoisolator kit into input connector J14. The other end of this cable goes to the optoisolation board’s 40-pin output connector.

2. Connect motor leads to output connector J13 located along the back edge of the top board. Phase A, phase B, and phase C are labeled Ph. A, Ph. B, and Ph. C. There are two connections for each phase, to accommodate the independent phase coil configuration that is used in switched reluctance motors.

Figure 1-3. Setup

Figure 1-3. Setup

ControlBoard

+12 VDC

40 Pin Ribbon

Standoffs

Standoffs

40 Pin RibbonPower Stage

Optoisolator

M

Mot orola

Dav e’sControlCent er

High VoltageMotor Supply

- + -- ++

Ph A

Ph B

Ph C

1

High VoltageMotor Supply

Standoffs

Standoffs

+12 Vdc

40 PinRibbon

40 PinRibbon





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3. Connect earth ground to the earth ground terminals on the top board and on the heat sink. The top board’s ground terminal is located in the front left-hand corner, and is marked with a ground symbol. The heat sink has a screw on its front edge that is also marked with a ground symbol.

4. Connect an isolated line, current limited dc power supply to connector J11 located on the front edge of the top board. The input voltage range is 140 Vdc to 230 Vdc. Current limit should be set for less than 4 amps. The dc supply’s polarity does not matter.

Either a 110-volt or 220-volt ac line that is coupled through an isolation transformer may be used in place of a dc supply to provide input power. The connection is made on connector J11. Bias voltages are developed by internal power supplies. One power input is all that is required.

CAUTION: Operation from an ac power line is significantly more hazardous than operation from a line isolated and current limited dc power supply.

An isolation transformer should be used when operating from an ac power line.

5. Setup the optoisolation and control boards.

6. The HV SR power stage is shipped with power factor correction (PFC) disabled. If power factor correction is desired, it is necessary to remove and re-solder power jumper JP201 from the no PFC position to the PFC position. This jumper is found on the left side of the top board, between the dc bus capacitor and PFC inductor. Circuit connections are illustrated in Figure 1-4. For first time setups, operation without power factor correction is recommended.

7. Apply power first to the optoisolator and then to the power stage. The green power-on LED in the upper right-hand corner lights, and both fans run when power is present.

NOTE: The optoisolation board powers the control board. The optoisolation board is not fully powered until power is applied to the power stage.

WARNING: Hazardous voltages are present. Please re-read all of the warnings in 1.4 Warnings carefully.




Introduction and SetupSetup Guide

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Figure 1-4. PFC Jumper





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Section 2. Operational Description

2.1 Contents

2.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.3 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2.4 Modification for 1/2 and 3/4 Horsepower . . . . . . . . . . . . . . . . . . . . . 22

2.5 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2.2 Description

Motorola’s embedded motion control series high-voltage (HV) switched reluctance (SR) power stage is a 180 watt (1/4 horsepower), 3-phase power stage that will operate off of dc input voltages from 140 volts to 230 volts and ac line voltages from 100 volts to 240 volts. In combination with one of Motorola’s Embedded Motion Control Series control boards and an optoisolation board, it provides a software development platform that allows algorithms to be written and tested, without the need to design and build a power stage. It supports a wide variety of algorithms for controlling switched reluctance motors.

Input connections are made via 40-pin ribbon cable connector J14. Pin assignments for the input connector are shown in Figure 3-1. 40-Pin Ribbon Connector J14. Power connections to the motor are made on output connector J13. Phase A, phase B, and phase C are labeled Ph. A, Ph. B, Ph. C on the board. Power requirements are met with a single external 140-volt to 230-volt dc power supply or an ac line voltage. Either input is supplied through connector J11. Current measuring circuitry is set up for 2.93 amps full scale. Both bus and phase leg currents are measured. A cycle-by-cycle overcurrent trip point is set at 2.69 amps.


MOTOROLA Operational Description 19 For More Information On This Product,


Operational Description

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The HV SR power stage has both a printed circuit board and a power substrate. The printed circuit board contains IGBT gate drive circuits, analog signal conditioning, low-voltage power supplies, power factor control circuitry, and some of the large passive power components. This board also has a MC68HC705JJ7 microcontroller used for board configuration and identification. All of the power electronics that need to dissipate heat are mounted on the power substrate. This substrate includes the power IGBTs, brake resistors, current-sensing resistors, a power factor correction MOSFET, and temperature sensing diodes. Figure 2-1 shows a block diagram.

Figure 2-1. Block Diagram

HV POWERINPUT SWITCH MODE

POWER SUPPLYPFC CONTROL

3-PHASE IGBT

GATE

PHASE CURRENTPHASE VOLTAGE

BUS CURRENTMONITOR

BOARDID BLOCK

SIGNALSTO/FROMCONTROL

BOARD

POWER MODULE

DRIVERS

SR MOTORTO 3-PHASE

DC BUS BRAKE


20 Operational Description MOTOROLA For More Information On This Product,


Operational DescriptionElectrical Characteristics

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2.3 Electrical Characteristics

The electrical characteristics in Table 2-1 apply to operation at 25°C with a 160-Vdc supply voltage.

Table 2-1. Electrical Characteristics

Characteristic Symbol Min Typ Max Units

DC input voltage Vdc 140 160 230 V

AC input voltage Vac 100 208 240 V

Quiescent current ICC — 70 — mA

Min logic 1 input voltage VIH 2.0 — — V

Max logic 0 input voltage VIL — — 0.8 V

Analog output range VOut 0 — 3.3 V

Bus current sense voltage ISense — 563 — mV/A

Bus voltage sense voltage VBus — 8.09 — mV/V

Peak output current IPK — — 2.7 A

Brake resistor dissipation (continuous) PBK — — 50 W

Brake resistor dissipation (15 sec pk) PBK(Pk) — — 100 W

Total power dissipation Pdiss — — 85 W





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2.4 Modification for 1/2 and 3/4 Horsepower

The HV SR power stage can be modified to drive either 1/2 or 3/4 horsepower motors. To change maximum output power these steps apply:

1. Remove power and wait until the power-on LED is off.

2. If PFC jumper JP201 is in the PFC position, remove and resolder it into the no PFC position.

3. Make the resistor value changes shown in Table 2-2. These resistors set current amplifier gains. For 1/2 and 3/4 horsepower motors, lower gains allow for higher measured currents, and higher overcurrent trip points.

4. Configure identification coding jumper JP801 with the settings that are indicated in Table 2-3. This procedure allows software to interpret the new analog values correctly.

5. For 3/4 horsepower motors it is also necessary to add an additional 470-µF/400-volt bus capacitor. To install the capacitor, it is first necessary to remove PFC inductor L201. Mounting holes for the additional capacitor are located within L201’s footprint. Note that it is essential to orient the capacitor such that polarity is correct. Positive and negative connections are indicated by + and – silk screened labels on the board. In addition, the pad for the capacitor’s positive lead is square, and the pad for its negative lead is round.

Table 2-2. Resistor Value

Resistors1/4 HP(180 W)

1/2 HP(370 W)

3/4 HP(550 W)

R303, R305, R307, R314,R315, R318, R319, R322

75 kΩ 62 kΩ 56 kΩ

R301, R304, R311, R313,R316, R317, R320, R321

10 kΩ 15 kΩ 16 kΩ

Table 2-3. JP801 Settings

Position1/4 HP(180 W)

1/2 HP(370 W)

3/4 HP(550 W)

1-2 Open Short Open

3-4 Open Open Short

5-6 Open Open Open

7-8 Open Open Open




Operational DescriptionFuse Replacement

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Once these changes have been made, configuration for either 1/2 or 3/4 horsepower is complete.

2.5 Fuse Replacement

A fast-blow fuse is located on the front right-hand corner of the top board. If this fuse has to be replaced these steps apply:

1. Remove power and wait until the power-on LED is off.

2. Remove the fuse’s protective case.

3. Replace the fuse with one of the selections shown in Table 2-4.

4. Replace the protective case.

5. Set the controller’s speed control input to 0 RPM.

6. Apply power and resume operation.

Table 2-4. Fuse Ratings

MotorHorsepower

RMSInput Current

(Amps)

FuseCurrent Rating

(Amps)

FuseVoltage Rating

(Volts)

FuseType

1/4 2.3 2.5 250 Fast blow

1/2 4.8 6.3 250 Fast blow

3/4 7.1 8 250 Fast blow





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Section 3. Pin Descriptions

3.1 Contents

3.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3 Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.1 40-Pin Ribbon Connector J14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.2 Power Connectors J11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.3 External Brake Connectors J12 . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3.4 Motor Output Connector J13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3.2 Introduction

There are four connectors on the top board for making input and output connections. They are:

• J11 — Power input connector

• J12 — Brake connector

• J13 — Motor output connector

• J14 — 40-pin ribbon cable connector

Pin descriptions for each of these connectors are identified in this subsection. Pin assignments for the 40-pin ribbon connector, J14, are shown in Figure 3-1. In this figure, a schematic representation appears on the left, and a physical layout of the connector appears on the right. The physical view assumes that the board is oriented such that its title is read from left to right. Signal descriptions are provided in Table 3-1.


MOTOROLA Pin Descriptions 25 For More Information On This Product,


Pin Descriptions

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3.3 Signal Descriptions

This subsection describes the signals.

3.3.1 40-Pin Ribbon Connector J14

Signal inputs are grouped together on a 40-pin ribbon cable connector, J14, located on the right side of the board. Pin assignments are shown in Figure 3-1. Signal descriptions are listed in Table 3-1.

3.3.2 Power Connectors J11

The power input connector, labeled J11, is located on the front edge of the board. It will accept dc voltages from 140 to 230 volts, or an isolated ac line input from 100 to 240 volts. In either case, the power source should be capable of supplying at least 200 watts.

3.3.3 External Brake Connectors J12

An optional external brake resistor can be connected to external brake connector J12, labeled Ext. Brake. The external resistor allows power dissipation to be increased beyond the 50 watts that brake resistors R6–R9 provide.


26 Pin Descriptions MOTOROLA For More Information On This Product,


Pin DescriptionsSignal Descriptions

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Figure 3-1. 40-Pin Ribbon Connector J14

40

3938

3736

3534

3332

3130

2928

2726

2524

2322

2120

1918

1716

1514

1312

1110

98

76

54

32

1

Shielding

PFC_z_cPFC_inhibit

PFC_PWMSerial_Con

Brake_controlShielding

Temp_sense

I_sense_CI_sense_B

I_sense_AI_sense_DCB

V_sense_DCB–15V_A

+15V_AGNDA

GNDA+3.3V_A

+5V_A+5V_A

GNDGND

PWM_CBShielding

PWM_CTShielding

PWM_BBShielding

PWM_BTShielding

PWM_ABShielding

PWM_AT

SCHEMATIC VIEW

J14

2

46

810

1214

1618

2022

2426

2830

3234

3638

40

1

35

79

1113

1517

1921

2325

2729

3133

3537

39

Shielding

ShieldingShielding

ShieldingShielding

GND+5V_D

+3.3V_AGNDA

–15V_AI_sense_DCB

I_sense_BTemp_sense

ShieldingSerial_Con

PFC_inhibit

PWM_AT

PWM_ABPWM_BT

PWM_BBPWM_CT

PWM_CBGND_PS

+5V_DGNDA

+15_AV_sense_DCB

I_sense_AI_sense_C

Brake_control

PFC_PWMPFC_z_c

Shielding

PHYSICAL VIEW




Pin Descriptions

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Table 3-1. Connector J14 Signal Descriptions

Pin No.

Signal Name Description

1 PWM_ATPWM_AT is the gate drive signal for the top half-bridge of phase A. A logic high turns phase A’s top switch on.

2 Shielding Pin 2 is connected to a shield wire in the ribbon cable and ground on the board.

3 PWM_ABPWM_AB is the gate drive signal for the bottom half-bridge of phase A. A logic high turns phase A’s bottom switch on.


5 PWM_BTPWM_BT is the gate drive signal for the top half-bridge of phase B. A logic high turns phase B’s top switch on.


7 PWM_BBPWM_BB is the gate drive signal for the bottom half-bridge of phase B. A logic high turns phase B’s bottom switch on.


9 PWM_CTPWM_CT is the gate drive signal for the top half-bridge of phase C. A logic high turns phase C’s top switch on.


11 PWM_CBPWM_CB is the gate drive signal for the bottom half-bridge of phase C. A logic high turns phase C’s bottom switch on.

12 GND Digital and power ground

13 GND Digital and power ground, redundant connection

14 +5V digital Digital +5-volt power supply

15 +5V digital Digital +5-volt power supply, redundant connection

16 +3.3V analog Analog +3.3-volt power supply

17 GNDA Analog power supply ground

18 GNDA Analog power supply ground, redundant connection

19 +15V_A Analog +15-volt power supply

20 –15V_A Analog –15-volt power supply

21 V_sense_DCBV_sense_DCB is an analog sense signal that measures dc bus voltage. It is scaled at 8.09 mV per volt of dc bus voltage.

22 I_sense_DCBI_sense_DCB is an analog sense signal that measures dc bus current. It is scaled at 0.563 V per amp of dc bus current.




Pin DescriptionsSignal Descriptions

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23 I_sense_AI_sense_A is an analog sense signal that measures current in phase A. It is scaled at 0.563 V per amp of dc bus current.

24 I_sense_BI_sense_B is an analog sense signal that measures current in phase B. It is scaled at 0.563 V per amp of dc bus current.

25 I_sense_CI_sense_C is an analog sense signal that measures current in phase C. It is scaled at 0.563 V per amp of dc bus current.

26 Temp_sense Temp_sense is an analog sense signal that measures power module temperature.

27 No connection

28 ShieldingPin 28 is connected to a shield wire in the ribbon cable and analog ground on the board.

29 Brake_control Brake_control is the gate drive signal for the brake IGBT.

30 Serial_Con Serial_Con is an identification signal that lets the controller know which power stage is present.

31 PFC_PWMPFC_PWM is a digital signal that controls the power factor correction circuit’s switch.

32 PFC_inhibitPFC_inhibit is a digital signal that is used to enable or disable the power factor correction circuit.

33 PFC_z_cPFC_z_c is a digital signal and its edges represent power line voltage 0 crossing events.

34 No connection

35 No connection

36 No connection

37 Shielding Pin 37 is connected to a shield wire in the ribbon cable and analog ground on the board.

38 No connection

39 No connection

40 No connection

Table 3-1. Connector J14 Signal Descriptions (Continued)

Pin No.

Signal Name Description




Pin Descriptions

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3.3.4 Motor Output Connector J13

Power outputs to the motor are located on connector J13. Phase outputs are labeled Ph. A, Ph. B, and Ph. C. Pin assignments are:

• Pin 1: Ph. A — Pin 1 supplies power to motor Phase A. It is connected to bottom switch output signal Phase_AB. Either of the two phase A motor leads may be connected here.

• Pin 2: Ph. A — Pin 2 supplies power to motor Phase A. It is connected to top switch output signal Phase_AT. Either of the two phase A motor leads may be connected here.

• Pin 3: Ph. B — Pin 3 supplies power to motor Phase B. It is connected to bottom switch output signal Phase_BB. Either of the two phase B motor leads may be connected here.

• Pin 4: Ph. B — Pin 4 supplies power to motor Phase B. It is connected to top switch output signal Phase_BT. Either of the two phase B motor leads may be connected here.

• Pin 5: Ph. C — Pin 5 supplies power to motor Phase C. It is connected to bottom switch output signal Phase_CB. Either of the two phase C motor leads may be connected here.

• Pin 6: Ph. C — Pin 6 supplies power to motor Phase C. It is connected to top switch output signal Phase_CT. Either of the two phase C motor leads may be connected here.




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Section 4. Schematics and Parts List

4.1 Contents

4.2 Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.3 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.4 Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.2 Mechanical Characteristics

Mechanically, the HV SR power stage consists of an FR-4 circuit board, a 3.2-mm aluminum circuit board, two fans, a fan bracket, a heat sink, inter-board connectors, and standoffs. Construction is depicted in Figure 1-2. 3-Phase Switched Reluctance High-Voltage Power Stage. The aluminum circuit board, fans, and heat sink provide the thermal capability surface mounted power components. The FR-4 board contains control circuitry and through-hole mounted power components. The two boards plug together via 10 vertical connectors to, in effect, form a discrete power module.

Four holes on the top board are spaced to allow mounting standoffs such that a control board can be placed on top of the power stage. This configuration allows mounting control and power functions in one compact mechanical assembly.


MOTOROLA Schematics and Parts List 31 For More Information On This Product,


Schematics and Parts List

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4.3 Schematics

A set of schematics for the HV SR power stage appears in Figure 4-1 through Figure 4-7.

• An overview appears in Figure 4-1.

• Output transistor gate drive is shown in Figure 4-2.

• The 3-phase output stage appears in Figure 4-3.

• Current and temperature feedback circuits are shown in Figure 4-4.

• Power factor correction and brake gate drives are shown in Figure 4-5.

• The identification block is shown in Figure 4-6.

• The on-board power supply is shown in Figure 4-7.

Unless otherwise specified, resistors are 1/8 watt, have a ±5% tolerance, and have values shown in ohms. Interrupted lines coded with the same letters are electrically connected. Parts lists for the power substrate and printed circuit board appear in Table 4-1 and Table 4-2.


32 Schematics and Parts List MOTOROLA For More Information On This Product,


Schematics and Parts ListSchematics

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Fig

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4-1.

3-P

has

e H

R H

igh

-Vo

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e P

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tag

e O

verv

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PWM_CB

+F

AN

J15

PWM_AT

GN

D

J14 12345678910111213141516171819202122232425262728293031323334353637383940

Sheilding

GN

D

Shielding

J11

12

Phase_CT

Ear

thG

roun

d

GN

D

+15

V_A

J10

CO

N/B

1

3456

2

Phase_BT

Temp_sense

J9 CO

N/E

1234

Shielding

GN

DA

+5V

_D

J4 CO

N/C

1

456

PWM_BB

HV

_Driv

ers

Gate_AT

Gat

e_A

BGate_BT

Gat

e_B

B

Gate_CT

Gat

e_C

B

PW

M_A

TP

WM

_AB

PW

M_B

TP

WM

_BB

PW

M_C

TP

WM

_CB

GND

+15V_D

Sou

rce_

CB

Sou

rce_

BB

Sou

rce_

AB

Source_BT+5V_D

Shut_DownSource_CT

Source_AT

+5V

_D

Tem

p_se

nse_

2

+5V

_D

FAN

12

Tem

p_se

nse_

2

C1

100n

F

Mot

orTe

rmin

als

+F

AN

GN

DA

J1 CO

N/A

1234

9101112

17181920

J5 CO

N/D

123

6

8910

+15

V_D

GN

D

PFC_PWM

-15V

_A

Serial_Con

D1

V14

E25

0

SMPS

GN

D

GN

DA

+5V_D

+15V_D

+3.3V_A

+15V_A-15V_A

Power_pos

Power_neg

-FAN+FAN

PWM_BT

+3.

3V_A

GN

DA

-FA

N

Bra

ke

+5V

_D

J2 CO

N/A

1234

9101112

17181920

+15

V_D

Shielding

Phase_AB

I_sense_C

PFC_inhibit

Line

Inpu

t

+15

V_D

F1

2.5A

/250

V

GN

DA

J12

1 2

I_T

_Pro

cess

ing

I_sense_DCB1I_sense_DCB2

I_sense_A1I_sense_A2

I_sense_B1I_sense_B2

I_sense_C1I_sense_C2

GN

DA

I_se

nse_

DC

BI_

sens

e_A

I_se

nse_

BI_

sens

e_C

Tem

p_se

nse_

1T

emp_

sens

e_2

Tem

p_se

nse

+3.

3V_A

Shu

t_D

own_

Ope

n C

.+

15V

_D

GN

D

Sheilding

PWM_CT

GN

D

iR

1R

/ivar

SG

-190

J6 CO

N/D

123

6

8910

+3.

3V_A

I_sense_B

+5V

_D

GN

D

Phase_CB

PFC_DC_BUS_BRAKE

PFC_PWM

PFC_z_cPFC_enable

PFC_I_sense_1

DCB_PFC_1DCB_PFC_2

GND

+15V_D+5V_D

+15V_A

GNDA

PFC_Source

Brake_control

DCB_Cap_neg

Brake_gate

V_sense_DCB_5V_sense_DCB_half_15

DCB_Cap_pos

PFC_gate

Ear

th_G

ND

I_sense_DCB

GN

DA

PWM_AB

+3.

3V_A

Phase_BB

+15

V_D

C2

100n

F

POWER

MODULE

GN

DA

Fas

t-B

low

GN

DA

+15

V_A

Shielding

PFC_z_c

FAN

12

V_sense_DCB

J7 CO

N/D

123

6

8910

Shielding

-15V

_A

J13

1 2 3 4 5 6

Phase_AT

+15

V_A

Brake_control

Iden

tific

atio

n

+5V

_D GN

D

Identification

-FA

N

J8 CO

N/E

1234

J3 CO

N/B

1

3456

2

I_sense_A





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4-2.

Gat

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+

C40

64.

7uF

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U40

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IR21

12S

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10 11 12 13 14 15 16LO

CO

MV

CC

n/c

n/c

VS

VB

HO

n/c

n/c

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DH

INS

DLI

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SS

n/c

R41

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100

C42

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CC

n/c

n/c

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VB

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n/c

n/c

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INS

DLI

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SS

n/c

C41

48.

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R41

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0

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C41

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PW

M_B

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GN

DGN

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ALS

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n/c

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n/c

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416

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F

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MS

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MS

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k

PW

M_A

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MS

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3-P

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Gate_PFC

Gate_AB

Gat

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rake

DC

B_C

ap_N

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I_S

ense

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B1

J2S

M/C

ON

/MC

RD

_SR

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_A -

mal

e

1234

9101112

17181920

Sou

rce_

BB

Gat

e_C

B

J1S

M/C

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/MC

RD

_SR

_500

_A -

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e

1234

9101112

17181920

Temp_sense2

Q1

SG

B10

N60

Q7

SG

B10

N60

Gat

e_B

T

Source_PFC

DC

_BU

S_I

N

J6S

M/C

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/MC

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mal

e

123

6

89

10

Gate_BT

AC

_IN

_L2

Pha

se_C

T

sense

sense

R1

0.07

5 1

%

I_S

ense

_PF

C1

I_se

nse_

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Pha

se_B

B

Brake_Res

R8

250

Temp_sense1

DCB_Cap_Pos

I_sense_C1

Gat

e_B

B

D12

HF

A08

TB

60S

I_se

nse_

C2

Pha

se_C

B

Gat

e_A

T

Sou

rce_

CB

Source_CB

Tem

p_se

nse2

sense

sense

R3

0.07

5 1

%

D14

BA

V99

LT1

I_se

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J7S

M/C

ON

/MC

RD

_SR

_500

_D -

mal

e

123

6

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10

DC

_BU

S_O

UT

R9

250

Bra

ke_R

es

Gate_CB

J5S

M/C

ON

/MC

RD

_SR

_500

_D -

mal

e

123

6

89

10

sense

sense

R4

0.07

5 1

%

D6

HF

A16

TA

60C

S

AC_IN_L2

D8

10E

TS

08S

Sou

rce_

AB

I_Sense_PFC1

D4

HF

A16

TA

60C

S

I_se

nse_

B2

Phase_CB

AC

_IN

_L1

Sou

rce_

PF

C

Gate_Brake

sense

sense

R2 0.07

5 1

%

Phase_AT

I_Sense_DCB1

Gat

e_A

B

I_sense_C2

AC_IN_L1

I_S

ense

_DC

B2

Q8

MT

B8N

50E

I_Sense_PFC2

R6

250

DC_BUS_IN

Gate_CT

J4S

M/C

ON

/MC

RD

_SR

_500

_C -

mal

e

1

456

DC

B_C

ap_P

os

I_sense_B2

Gat

e_C

T

I_Sense_DCB2

Gate_AT

Phase_CT

I_se

nse_

B1

J8S

M/C

ON

/MC

RD

_SR

_500

_E -

mal

e

1234

Gat

e_P

FC

J9S

M/C

ON

/MC

RD

_SR

_500

_E -

mal

e

1234

Phase_BT

Tem

p_se

nse1

D3

HF

A16

TA

60C

SQ

4S

GB

10N

60D

5H

FA

16T

A60

CS

Pha

se_A

T

Phase_BB

DC_BUS_OUT

D7

10E

TS

08S

I_se

nse_

C1

Source_BB

I_sense_B1

D10

10E

TS

08S

I_sense_A2

I_S

ense

_PF

C2

Q5

SG

B10

N60

I_sense_A1

R7

250

J3S

M/C

ON

/MC

RD

_SR

_500

_B -

mal

e

1

3456

2

D9

10E

TS

08S

Source_AB

Q3

SG

B10

N60

Pha

se_B

T

J10

SM

/CO

N/M

CR

D_S

R_5

00_B

- m

ale

1

3456

2

D2

HF

A16

TA

60C

S

Q2

SG

B10

N60

sense

sense

R5

0.07

5 1

%

Q6

SG

B10

N60

D13

BA

V99

LT1

D11

HF

A08

TB

60S

Gate_BB

Phase_AB

Pha

se_A

BD

1H

FA

16T

A60

CS

DCB_Cap_Neg





F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

Fig

ure

4-4.

Cu

rren

t an

d T

emp

erat

ure

Fee

db

ack

I_se

nse_

BG

ND

AR

312

10k

Tem

p_se

nse_

2

+3.

3V_A

GN

DA

R30

775

k-1%

R32

010

k-1%

R31

110

k-1%

+C

306

3.3u

F/1

0V

R32

275

k-1%

R30

668

0k

I_se

nse_

A2

Ove

rcur

rent

Det

ectio

n+

15V

_D

R31

047

0

GN

DA

Shu

t_D

own_

Ope

n C

.

I_se

nse_

DC

B1

I_se

nse_

B1

R31

610

k-1%

R30

575

k-1%

+15

V_D

R32

110

k-1%

I_se

nse_

C1

Tem

pera

ture

Sen

sing

+3.

3V_A

I_se

nse_

DC

B

(1.6

5V +

/- 1

.65V

@ +

/- Im

ax)

GN

D

+ -

U30

3B

LM39

3D

5 67

8 4

GN

DA

+-

U30

1BM

C33

502D

567

R32

410

0k-1

%

GN

DA

R32

533

.2k-

1%

C30

368

0pF

R32

339

0

GN

DA

I_se

nse_

C2

+3.

3V_A

I_se

nse_

DC

B

R31

710

k-1%

+15

V_D

+15

V_D

I_se

nse_

DC

B2

+3.

3V_A

+-

U30

1AM

C33

502D

321

84

C30

510

0nF

R30

375

k-1%

GN

D

(1.6

5V +

/- 1

.65V

@ +

/- Im

ax)

I_se

nse_

A

Pha

se C

urre

ntS

ensi

ng

R30

91.

2k

C30

710

0nF

GN

DA

+-

U30

2AM

C33

502D

321

84

C30

410

0nF

+-

U30

2BM

C33

502D

567

U30

4LM

285M

8

5

4

R31

975

k-1%

Tem

p_se

nse_

1

GN

DA R

313

10k-

1%

R30

81.

2k

+3.

3V_A

GN

DA

Over-curent

threshold =

3.15V

GN

DA

R31

475

k-1%

+ -

U30

3A

LM39

3D

3 21

8 4

R31

575

k-1%

GN

DA

GN

D

+3.

3V_A

I_se

nse_

B2

DC

Bus

Cur

rent

Sen

sing

GN

D

GN

D

C30

110

0nF

Tem

p_se

nse

I_se

nse_

A1

I_se

nse_

C(1

.65V

+/-

1.6

5V @

+/-

Imax

)

1.65

V r

ef+

3.3V

_A

R31

875

k-1%

R30

110

k-1%

GN

DA

I_se

nse_

DC

B

R30

410

k-1%

R30

2

2.21

k-1%

C30

210

nF





F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

Fig

ure

4-5.

Po

wer

Fac

tor

Co

rrec

tio

n a

nd

Bra

ke G

age

Dri

ve

R22

86.

81k-

1%

GN

D

R21

72.

7k

R20

23.

3k

R22

5

274k

-1%

GN

D

DC

B_P

FC

_2R

220

33k

U20

1A

MC

74V

HC

T00

AD

1 23

DC

B_C

ap_p

os

R22

1

33k

R22

6

4.87

k-1%

C20

310

0nF

R21

84.

7k

PF

C_g

ate

+

C20

947

0uF

/400

V

C20

722

nF

PF

C_S

ourc

e

GN

DA

R20

9

10k-

1%

U20

1B

MC

74V

HC

T00

AD

4 56

+15

V_A

U20

1D

MC

74V

HC

T00

AD

12 1311

R20

4

100

R21

510

k

C21

310

nF/3

000V

R22

925

5-1%

R21

627

0k

GN

D

L201

4.9m

H/2

.3A

R20

5

1k-1

%

+5V

_D

U20

1C

MC

74V

HC

T00

AD

9 108

GN

DA

Bu

s V

olt

age

Sen

sin

g

GN

D

GN

D

GN

D

PF

C_P

WM

R22

310

k

GN

D

R22

210

k

PF

C G

ate

Dri

ve

GN

DA

GN

D

VC

C

C21

21n

F

C20

5

22nF

R23

06.

81k-

1%

D20

2M

MS

Z52

51B

T1

ref_

h =

11.

76V

+15

V_D

+5V

_D

Out

BIn

B

GN

D

InA

NC

NC

Out

A

VC

CU

202

MC

3315

2D

2

3

5

6

781 4

R20

1

3.92

k-1%

R22

4

274k

-1%

DC

B_C

ap_n

eg

R21

0

33

R21

43.

3k

Bra

ke_c

ontr

ol

GN

DA

V_s

ense

_DC

B_h

alf_

15

+15

V_D

+15

V_A

(3.2

4V @

DC

-Bus

= 4

00V

)

PF

C O

pti

on

:

no

PF

C(d

efau

lt s

etti

ng

)

C20

410

nF

+ -

U20

3BLM

393D

5 67

8 4

C20

1

6.8n

F

+15

V_D

GN

D

R22

7

274k

-1%

GN

D

R21

310

k

R20

610

0k

D20

3S

M/1

N41

48

GN

D

+

C20

210

uF/3

5V

Zer

o C

ross

ing

Det

ecti

on

PF

C_e

nabl

e

C20

6 10nF

Bra

ke_g

ate

GN

D

PF

C_z

_c

C21

11n

F

+15

V_D

R20

810

k

+15

V_A

PF

C

+5V

_D

GN

D

JP20

1P

FC

Jum

per

1

2

3

R21

268

1-1%

+15

V_D

GN

D

C21

410

nF/3

000V

R21

9

33k

D20

1M

MS

Z52

51B

T1

+5V

_D

ref_

l = 1

1.72

V

R20

368

.1-1

%

GN

D

+15

V_D

C20

822

nF/6

30V

DC

+15

V_D

GN

DA

R20

712

.1k-

1%

Ear

th_G

ND

GN

DA

R21

110

k

+ -

U20

3ALM

393D

3 21

8 4

DC

B_P

FC

_1

Bra

ke G

ate

Dri

ve

V_s

ense

_DC

B

PF

C_I

_sen

se_1





F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

Fig

ure

4-6.

Iden

tifi

cati

on

Blo

ck

X80

1 4MH

zG

ND

+5V

_D

Coding bit #

7 6 5 4

U80

1

MC

68H

C70

5JJ7

DW

_MO

D

12345678910

20

1918 17161514131211

PB

1/A

N1

PB

2/A

N2

PB

3/T

CA

PP

B4/

TC

MP

PB

5P

B6

PB

7

PA

5P

A4

PA

3

PB

0

VC

CG

ND

OS

C1

OS

C2

RE

SE

TIR

Q

PA

0P

A1

PA

2

+5V

_D

GN

D

GN

D

Iden

tific

atio

n

R80

410

k

+5V

_D

DE

FAU

LT S

ETT

ING

S:

0 - P

TB0

= H

1 - P

TB1

= H

2 - P

TB2

= L

3 - P

TB3

= H

4 - P

TB4

= H

5 - P

TB5

= H

6 - P

TA6

= H

7 - P

TA7

= H

C80

210

nFR

803

10k

R80

110

k

+5V

_D

R80

510

k

+C

801

10uF

/6.3

V

GN

D

3 2 1 Coding bit #

JP80

1

SM

/JU

MP

ER

4x2

12

34

56

78

GN

D

+5V

_D

GN

D

+5V

_D

0 Coding bit #

R80

210

k

+5V

_D





F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

Fig

ure

4-7.

Po

wer

Su

pp

ly

U10

7M

C79

L15A

CD

5

21

367G

nd

Vin

Vou

tV

inV

inV

inR

106

2.21

k/1%

+15

V_D

GN

D

GN

D

R10

92.

21k/

1%

FB

U10

2T

OP

202Y

AI

3

1

2D

C

S

+5V

_D

+F

AN

D11

0M

BR

0530

T1

C11

210

0nF

R10

31.

0k

R10

0

1.0k

+

C10

8 33uF

/25V

R11

327

GN

DA

GN

DA

U10

0S

FH

6106

14

23

GN

D

D10

4

MB

RS

1100

T3

+

C10

222

0uF

/10V

Pow

er_p

os

+15

V_A

D11

1M

BR

0530

T1

U10

3T

NY

254P

7

4

8

5

2

3

1

6

SE

NS

Dra

in

S SBP

S

Pow

er_p

os+

15V

_A

D10

9M

BR

0530

T1

-15V

_A Pow

er_p

os

R11

227

-15V

_A

+

C12

933

uF/2

5V

U11

0M

C78

PC

33N

TR

1

2

3

5V

in

GND

-CE

Vou

t

+

C12

810

uF/6

.3V

+

C11

333

uF/2

5V

+15

V_D

+F

AN

D10

6M

BR

S11

00T

3

C11

010

0nF

GN

DA

+

C10

322

0uF

/10V

C10

9

100n

F

GN

D

U10

1T

L431

BC

D

1

8

23

76

R10

21.

0k

D10

5

MB

RS

1100

T3

+5V

_D

-15V

_A

R11

027

R11

127

R10

5

820

C10

010

pF/5

00V

D10

7M

MS

Z52

42B

T1

C10

510

0nF

+C

117

47uF

/16V

U10

8M

C78

L15A

CD

81

VIN 2

VO

UT

36

7

+5V

_D

GN

D

D11

3

GR

EE

N L

ED

GC

101

Gro

und_

Con

nect

ion

D11

2M

BR

0530

T1

+3.

3V_A

U10

4S

FH

6106

14

23

C12

51n

F/1

kV

+5V

_D

U10

6M

C78

L15A

CD

81

VIN 2

VO

UT

36

7

GN

D

GN

D

R10

427

0

FB

GN

DA

GN

D

T10

1S

M/T

rafo

_EF

D15

/12P

IN1 2

10 89

53 4

76

1112

GN

DA

D10

3

MB

RS

1100

T3

-FA

N

GN

D

+3.

3V_A

R11

533

0

C11

410

0nF

R10

856

+

C11

133

uF/2

5V

D10

1M

BR

D66

0CT

3

4

1

GN

D

-FA

N

R11

41.

0k

R10

1

1.0k

C12

310

0nF

+

C10

7

33uF

/25V

+17

V_D

C12

710

0nF

+17

V_D

C12

610

0nF

+

C10

122

0uF

/10V

+C

122

100u

F/1

6V

D10

8M

MS

Z52

31B

T1

+15

V_D

GN

D

D10

0

P6S

MB

200A

T3

Pow

er_n

eg

C12

410

0pF

/500

V

+15

V_A

C11

6

100n

F

T10

0

SM

/Tra

fo_E

FD

20/1

2PIN

1 2

10 89

53 4

76

1112

+F

AN

-FA

N

+C

104

10uF

/6.3

V

GN

D

+3.

3V_A

D10

2

MU

RS

160T

3

Pow

er_p

os





F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

4.4 Parts Lists

The HV SR power stage’s parts content is described in Table 4-1 for the power substrate and in Table 4-2 for the printed circuit board.

Table 4-1. Power Substrate Parts List

Qty Reference Description Manufacturer Part #

6D1, D2, D3, D4, D5, D6

8A/600V Ultrafast Rectifier International Rectifier HFA08TB60S

4 D7, D8, D9, D10 10A/800V Rectifier International Rectifier 10ETS08S

2 D11, D12 8A/600V Ultrafast Rectifier International Rectifier HFA08TB60S

2 D14, D13 Dual Diode – Temp Sensing On Semiconductor BAV99LT1

2 J1, J2 SM/CON/MCRD_SR_500_A — male Fisher Elektronik SL 11 SMD 104 20Z

2 J3, J10 SM/CON/MCRD_SR_500_B — male Fisher Elektronik SL 10 SMD 104 6Z

1 J4 SM/CON/MCRD_SR_500_C — male Fisher Elektronik SL 10 SMD 104 6Z

3 J5, J6, J7 SM/CON/MCRD_SR_500_D — male Fisher Elektronik SL 10 SMD 104 10Z

2 J8, J9 SM/CON/MCRD_SR_500_E — male Fisher Elektronik SL 10 SMD 104 4Z

7Q1, Q2, Q3, Q4, Q5, Q6, Q7

10A/600V IGBT Infineon SGB10N60

1 Q8 8A/500V MOSFET On Semiconductor MTB8N50E

Table 4-2. Printed Circuit Board Parts List (Sheet 1 of 5)

Qty Reference Description Part # Manufacturer

19

C1, C2, C105, C109, C110, C112, C114, C116, C123, C126, C127, C203, C301, C304, C305, C307, C401, C405, C409

100nF/25V Vitramon VJ0805U104MXXA_

1 C100 10pF/500V Vishay Sprague Typ:5GAQ10, Serie: 562C

3 C101, C102, C103 220uF/10V AVX TPSE227K010R0100

3 C104, C128, C801 10uF/6.3V Sprague 293D106X_6R3B2_

8C107, C108, C111, C113, C129, C416, C417, C418

33uF/25V AVX TPSE336K025R0200




Schematics and Parts ListParts Lists

F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

1 C117 47uF/16V Any available

1 C122 100uF/16V AVX TPSE107K016R0100

5C204, C206, C302, C425, C802

10nF Vitramon VJ0805U103MXXA_

1 C124 100pF/500V Vishay Sprague Typ:5GAT10, Serie: 562C

1 C125 1nF/1kV muRata DE0505E102Z1K

1 C201 6.8nF Vitramon VJ0805A682JXA_

1 C202 10uF/35V Sprague 293D106X_035D2_

2 C207, C205 22nF Vitramon VJ0805A223JXA_

1 C208 22nF/630VDC WIMA MKP10

1 C209 470uF/400V Philips Components 15746471

8C211, C212, C419, C420, C421, C422, C423, C424

1nF Vitramon VJ0805A102JXA_

2 C213, C214 10nF/ 3000V Thomson 5ST410MCMCA

1 C303 680pF Vitramon VJ0805A681JXA_

1 C306 3.3uF/10V Sprague 293D335X_010A2_

3 C402, C406, C410 4.7uF/16V Sprague 293D475X_016B2_

6C403, C404, C407, C408, C411, C412

470nF/50V Vitramon VJ1206U474MXAA_

3 C413, C414, C415 8.2pF Vitramon VJ0805A8R2DXA_

1 D1 Disk Varistor EPCOS SOIV-S-10K250

1 D100 Transient Suppressor On Semiconductor P6SMB200AT3

1 D101 6A/60V Shottky On Semiconductor MBRD660CT

4D102, D401, D408, D413

1A/600V Ultrafast On Semiconductor MURS160T3

4D103, D104, D105, D106

1A/100V Schottky On Semiconductor MBRS1100T3

1 D107 12V Zener On Semiconductor MMSZ5242BT1

1 D108 5.1V Zener On Semiconductor MMSZ5231BT1

4D109, D110, D111, D112

.0.5A/30V Schottky On Semiconductor MBR0530T1

1 D113 Green LED Kingbright L-934GT







F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

8D201, D202, D403, D405, D407, D410, D412, D415

22V Zener On Semiconductor MMSZ5251BT1

1 D203 SMD/1N4148 FairChild 1N4148LL-34

6D402, D404, D406, D409, D411, D414

1A/30V Schottky On Semiconductor MBRS130LT3

1 F1 Fuse Holder MULTICOMP MCHTE15M

1 JP201 Power Jumper — Wire, D = 1.5mm, L = 12mm

1 JP801 4X2 Jumper Pads — —

2 J2, J1 20 Pin Female Header Fisher Elektronik BL 2 20Z


1 J4 6 Pin Female Header Fisher Elektronik BL 1 6Z

3 J5, J6, J7 10 Pin Female Header Fisher Elektronik BL 1 10Z


2 J11, J12 2 Pole Terminal Block Weidmuller LP 7.62/2/90

1 J13 3 Pole Terminal Block Weidmuller LP 7.62/3/90 — see note!

1 J1440 Pin Connector — male

Fischer Elektronik ASLG40G

1 L201 4.9mH/2.3A Thompson Television Compon. SMT4 ref G6982-01

1 R1 Inrush Limiter Rhopoint Components SG190

4R100, R101, R102, R103

1.0k Dale CRCW1206-102J

1 R104 270_ Dale CRCW0805-271J

1 R105 820_ Dale CRCW0805-821J

2 R106, R109 2.21k–1% Any available —

1 R108 56_ Any available —

4R110, R111, R112,R113

27_ Dale CRCW1206-270J

1 R114 1.0k Dale CRCW0805-102J

1 R115 330_ Dale CRCW0805-331J

1 R201 3.92k–1% Any available —






Schematics and Parts ListParts Lists

F

ree

sca

le S

em

ico

nd

uc

tor,

I


c..

.

18

R208, R211, R213, R215, R223, R312, R403, R404, R407, R408, R411, R412, R414, R801, R802, R803, R804, R805

10k Dale CRCW0805-103J

2 R202, R214 3.3k Dale CRCW0805-332J

1 R203 68.1–1% Any available

2 R204, R413 100_ Dale CRCW0805-101J

1 R206 100k Dale CRCW0805-104J

1 R207 12.1k–1% Any available

1 R210 33_ Dale CRCW0805-330J

1 R212 681_–1% Any available

1 R216 270k Dale CRCW0805-274J

1 R217 2.7k Dale CRCW0805-272J

1 R218 4.7k Dale CRCW0805-472J

1 R219 33k Dale CRCW0805-333J

2 R220, R221 33k Dale CRCW0805-333J

1 R222 10k Dale CRCW0805-103J

3 R224, R225, R227 274k–1% Any available —


2 R228, R230 6.81k–1% Any available —

1 R229 255_–1% Any available —

9R209, R301, R304, R311, R313, R316, R317, R320, R321

10k–1% Dale CRCW0805-103F

1 R302 2.21k–1% Any available

1 R205 1k–1% Dale CRCW0805-102F

8R303, R305, R307, R314, R315, R318, R319, R322

75k–1% Dale CRCW0805-753F

1 R306 680k Dale CRCW0805-684J

2 R308, R309 1.2k Dale CRCW0805-122J

1 R310 470_ Dale CRCW0805-471J

1 R323 390_ Dale CRCW0805-391J







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1 R324 100k–1% Dale CRCW0805-104F


6R401, R402, R405, R406, R409, R410

120_ Dale CRCW0805-121J

1 T100 SMPS Transformer Tronic Praha s.r.o TRONIC 99 060 09

1 T101 SMPS Transformer Tronic Praha s.r.o TRONIC 00 003 73

2 U100, U104 Optocoupler Infineon SFH6106-2

1 U101 Voltage Reference On Semiconductor TL431BCD

1 U102 SMPS Controller Power Integration TOP202YAI

1 U103 SMPS Controller Power Integration TNY254P

2 U108, U106 15V Voltage Regulator On Semiconductor MC78L15ACD

1 U107 –15V Voltage Regulator On Semiconductor MC79L15ACD

1 U110 3.3V Voltage Regulator On Semiconductor MC78PC33NTR

1 U201 Quad NAND Gate On Semiconductor MC74VHCT00AD

1 U202 Gate Driver On Semiconductor MC33152D

2 U203, U303 Dual Comparator On Semiconductor LM393D

2 U301, U302 Rail-to-Rail Op Amp On Semiconductor MC33502D

1 U304 Voltage Reference National Semiconductor LM285M

3 U401, U402, U403 Gate Driver International Rectifier IR2112S

1 U404 Hex Driver Fairchild DM74ALS1034M

1 U801 Programmed MCU Motorola MC68HC708JJ7CDW

1 X801 4MHz Resonator muRata CSTCC4.00MG

1 — Sticker —

0 R107 NOT POPULATED — —

0 C115, C210 NOT POPULATED — —






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Section 5. Design Considerations

5.1 Contents

5.2 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.3 Phase Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.4 Bus Voltage and Current Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.5 Cycle-by-Cycle Current Limiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.6 Temperature Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.7 Phase Current Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

5.8 Brake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

5.9 Power Factor Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

5.2 Overview

From a systems point of view, the HV SR power stage fits into an architecture that is designed for software development. In addition to the hardware that is needed to run a motor, a variety of feedback signals that facilitate control algorithm development and a PFC circuit are provided.

Circuit descriptions for the HV SR power stage appear in this subsection.

5.3 Phase Outputs

The output stage is configured as a dual output per phase, 3-phase, bridge with IGBT output transistors. It is simplified considerably by high-voltage integrated gate drivers that have a cycle-by-cycle current limit feature. A schematic that shows one phase is illustrated in Figure 5-1.


MOTOROLA Design Considerations 45 For More Information On This Product,


Design Considerations

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Fig

ure

5-1.

Ph

ase

A O

utp

utGN

D

U40

4AD

M74

ALS

1034

M

12

+15

V_D

Q2

SG

B10

N60

R40

310

k

R41

3

100

+C

416

33uF

/25V

C41

38.

2pF

U40

1

IR21

12S

123456789 10 11 12 13 14 15 16

LOC

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VC

Cn/

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0nF

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Pha

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401

100n

F

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4BD

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1034

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34

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91n

F

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os

sense

sense

R1

0.07

5 1

%

C42

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Q1

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B10

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M_A

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R41

410

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5M

MS

Z52

51B

T1


46 Design Considerations MOTOROLA For More Information On This Product,


Design ConsiderationsPhase Outputs

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At the input, pull down resistors, R403 and R404, set a logic low in the absence of a signal. Open input pull down is important, since it is desirable to keep the power transistors off in case of either a broken connection or absence of power on the control board. The drive signal is buffered by U404A and U404B. This part has a minimum logic 1 input voltage of 2.0 volts and maximum logic 0 input voltage of 0.8 volts, which allows for inputs from either 3.3-volt or 5-volt logic. Gate drive is supplied by an International Rectifier IR2112. Under-voltage lockout and cycle-by-cycle current limiting are also provided by the IR2112. Under-voltage lockout is set nominally at 8.4 volts. Current limiting is discussed further in 5.5 Cycle-by-Cycle Current Limiting.

One of the more important design decisions in a motor drive is selection of gate drive impedance for the output transistors. In Figure 5-1, resistor R402, diode D404, and the IR2112’s nominal 500-mA current sinking capability determine gate drive impedance for the lower half-bridge transistor. A similar network is used on the upper half-bridge. These networks set turn-on gate drive impedance at approximately 120 ohms, and turn-off gate drive to approximately 500 mA. These values produce transition times of approximately 200 ns.

Transition times of this length represent a carefully weighed compromise between power dissipation and noise generation. Generally speaking, transition times longer than 250 ns tend to get power hungry at non-audible PWM rates; and transition times under 50 ns create di/dt’s so large that proper operation is difficult to achieve. The HV SR power stage is designed with switching times at the higher end of this range to minimize noise.

Anti-parallel diode softness is also a first order design consideration. If the anti-parallel diodes in an off-line motor drive are allowed to snap, the resulting di/dt’s can cause noise management problems that are difficult to solve. In general, it is desirable to have peak to zero di/dt approximately equal the applied di/dt that is used to turn the anti-parallel diodes off. The HFA16TA60CS soft recovery rectifiers that are used in this design are targeted at this kind of reverse recovery characteristic.





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5.4 Bus Voltage and Current Feedback

Feedback signals proportional to bus voltage and bus current are provided by the circuitry shown in Figure 5-2. Bus voltage is scaled down by a voltage divider consisting of R224–R230. The values are chosen such that a 400-volt maximum bus voltage corresponds to 3.24 volts at output V_sense_DCB. An additional output, V_sense_DCB_half_15 provides a reference that is used in zero crossing detection.

Bus current is sampled by resistor R4 in Figure 4-3. 3-Phase Output and amplified by the circuit in Figure 5-2. This circuit provides a voltage output suitable for sampling with A/D inputs. An MC33502 is used for the differential amplifier. With R315 = R319 and R316 = R317, the gain is given by:

A = R315/R316

The output voltage is shifted up by 1.65 V to accommodate both positive and negative current swings. A ±3000 mV voltage drop across the sense resistor corresponds to a measured current range of ±2.93 amps. In addition to providing an A/D input, this signal is also used for cycle-by-cycle current limiting. A discussion of cycle-by-cycle current limiting follows in 5.5 Cycle-by-Cycle Current Limiting.

5.5 Cycle-by-Cycle Current Limiting

Cycle-by-cycle current limiting is provided by the circuitry illustrated in Figure 5-3. Bus current feedback signal I_sense_DCB is filtered with R308 and C303 to remove spikes, and then compared to a 3.15-volt reference in U303B. The open-collector output of U303B is pulled up by R414. Additional filtering is provided by C413, C414, and C415. The resulting signal is fed into the IR2112 gate driver’s shutdown input on all three phases. Therefore, when bus current exceeds 2.69 amps, all six output transistors are switched off.

The IR2112’s shutdown input is buffered by RS latches for both top and bottom gate drives. Once a shutdown signal is received, the latches hold the gate drive off for each output transistor, until that transistor’s gate drive signal is switched low, and then is turned on again. Hence, current limiting occurs on a cycle-by-cycle basis.




Design ConsiderationsCycle-by-Cycle Current Limiting

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Figure 5-2. Bus Feedback

V_sense_DCB

GNDAGNDA

R225274k-1%

R323 390

(1.65V +/- 1.65V @ +/- Imax)

+3.3V_A

R227274k-1% R228

6.81k-1%

R317 10k-1%

R324100k-1%

R2306.81k-1%

DC Bus CurrentSensing

C307100nF

R224274k-1%

I_sense_DCB

I_sense_DCB1

C305100nF

GNDA

I_sense_DCB2 +

-

U302AMC33502D

3

21

84

R229255-1%

GNDA

GNDA

GNDA

V_sense_DCB_half_15

I_sense_DCB

1.65V ref

U304LM285M

8

5

4

R315 75k-1%

Bus VoltageSensing

R316 10k-1%

DCB_Cap_pos

+C306

3.3uF/10V

(3.24V @ DC-Bus = 400V)

R32533.2k-1%

+3.3V_A

R2264.87k-1%

R31975k-1%





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Figure 5-3. Cycle-by-Cycle Current Limiting

A Top Out

R413

100

GNDA

PWM C Bottom

+5V_D

C413 8.2pF

R306 680k

PWM B Top

B Top Out

C415 8.2pF

R41410k +5V_D

C Bottom Out

PWM C Top

R3091.2k

U401

IR2112S

123456789

10111213141516

LOCOMVCC

n/cn/cVSVBHOn/c

n/cVDDHINSDLINVSSn/c

PWM B Bottom

+5V_D

B Bottom Out

R31210k

U403

IR2112S

123456789

10111213141516

LOCOMVCC

n/cn/cVSVBHOn/c


+3.3V_A

PWM A Top

+

-

U303B

LM393D

5

67

84

GNDA

+15V_D

A Bottom Out

PWM A Bottom

C Top Out

GND

+5V_D

R310470

C414 8.2pF

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I_sense_DCB

U402

IR2112S

123456789

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Design ConsiderationsTemperature Sensing

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5.6 Temperature Sensing

Cycle-by-cycle current limiting keeps average bus current within safe limits. Current limiting by itself, however, does not necessarily ensure that a power stage is operating within safe thermal limits. For thermal protection, the circuit in Figure 5-4 is used. It consists of four diodes connected in series, a bias resistor, and a noise suppression capacitor. The four diodes have a combined temperature coefficient of –8.8 mV/°C. The resulting signal, Temp_sense, is fed back to an A/D input where software can be used to set safe operating limits.

Due to unit-to-unit variations in diode forward voltage, it is highly desirable to calibrate this signal. To do so, a value for Temp_sense is read at a known temperature and then stored in non-volatile memory. The measured value, rather than the nominal value, is then used as a reference point for further readings.

Figure 5-4. Temperature Sensing

R3022.2 kΩ –1%

C301100 nF

BAV99LT1

D13

PIN 26, CONNECTOR J14

+3.3V_A

BAV99LT1

D14

Temp_sense

GNDA





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5.7 Phase Current Sensing

Sampling resistors provide phase current information for all three phases. These resistors sample current in the lower phase legs which in a switched reluctance output directly measures phase current. The circuitry for phase A is shown in Figure 5-5.

Referencing the sampling resistors to the negative motor rail makes the measurement circuitry straightforward and inexpensive. Current is sampled by resistor R1, and amplified by differential amplifier U302B. This circuit provides a voltage output suitable for use with A/D inputs. An MC33502 is again used for the differential amplifier. With R301 = R304 and R303 = R305, the gain is given by:

A = R303/R301

The output voltage is shifted up by 1.65 V to accommodate both positive and negative current swings. A ±300-mV voltage drop across the shunt resistor corresponds to a measured current range of ±2.93 amps.




Design ConsiderationsPhase Current Sensing

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Figure 5-5. Phase A Current Sensing

1.65V ref

C307100nF

+

-

U302BMC33502D

5

67

DCB_Cap_Pos

GNDA

R324100k-1%

D2HFA16TA60CS

D1HFA16TA60CS

R303 75k-1%

Q1SGB10N60

R30575k-1%

GNDA

I_sense_A

R304 10k-1%

Gate_AT

Q2SGB10N60

+3.3V_A

DCB_Cap_Neg

R32533.2k-1%

U304LM285M

8

5

4

+C306

3.3uF/10V

Phase_AT

Gate_AB

GNDA

sense

sense

R10.075 1%

Phase_AB

R323 390

R301 10k-1%





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5.8 Brake

A brake circuit is included to dissipate re-generative motor energy during periods of active deceleration or rapid reversal. Under these conditions, motor back EMF adds to the dc bus voltage. Without a means to dissipate excess energy, an overvoltage condition could easily occur.

The circuit shown in Figure 5-6 connects R6–R9 across the dc bus to dissipate energy. Q7 is turned on by software when the bus voltage sensing circuit in Figure 5-2 indicates that bus voltage could exceed safe levels. On-board power resistors R6–R9 will safely dissipate up to 50 watts continuously or up to 100 watts for 15 seconds. Additional power dissipation capability can be added externally via brake connector J12.

Figure 5-6. Brake




Design ConsiderationsPower Factor Correction

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5.9 Power Factor Correction

A power factor correction (PFC) circuit is included to facilitate development of software that includes PFC control features. The objective of the PFC hardware and software are to draw sinusoidal current from the ac line in an attempt to approach as closely as possible a unity power factor. Without PFC, current is drawn from the ac line at the peak of the sine wave, when the ac line voltage exceeds the dc bus voltage. PFC circuitry is illustrated in Figure 5-7.

Figure 5-7. PFC Circuitry

I_Sense_PFC2

R209

10k-1%

C21310nF/3000V

R205

1k-1%

C20722nF

D910ETS08S

R201

3.92k-1%

+15V_D

U201C

MC74VHCT00AD

9

108

C21410nF/3000V

GND

+15V_A

sense

sense

R50.075 1%

no PFC

GND

PFC_PWM

R20810kC201

6.8nFC205

22nF

PFC_enable

+15V_D

AC_IN_L2

R203

68.1-1%

R21510k

GND

+

-

U203ALM393D

3

21

84

R21033

JP201

PFC Jumper1

2

3

+5V_D

U201B

MC74VHCT00AD

4

56

Q8MTB8N50E

R2143.3k

GND

+C209

470uF/400V

C20610nF

D710ETS08S

OutBInB

GND

InA

NC NC

OutA

VCCU202

MC33152D

23

5

67

81

4

R21310k

GND

L201

4.9mH/2.3A

U201A

MC74VHCT00AD

1

23

R20712.1k-1%

GNDGND

GNDA

AC_IN_L1

D202MMSZ5251BT1

D1010ETS08S

D12

HFA08TB60SD810ETS08S

Earth_GND

PFC

I_Sense_PFC1

R206 100k

R212681-1%

R21110k

PFC_I_sense_1

C20822nF/630VDC





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Looking toward the top of Figure 5-7, Q8, L201, D12, and the bus capacitors form a boost power supply. The configuration allows current to be drawn from the ac line, when line voltage is lower than the dc bus voltage. Pulse width modulation is controlled by software, and augmented by the analog circuitry in the lower half of Figure 5-7. Voltage feedback is provided by the bus voltage sensing circuit in Figure 5-2. A zero cross feedback signal, PFC_z_c, is also used. PFC_z_c is produced by the circuit shown in Figure 5-8.

In this circuit, R219, R220, and R221 provide a relatively high impedance connection to the rectified line voltage, and form an 11:1 voltage divider with R222. D203 clamps the divided down voltage to approximately 15.7 volts. Comparator U203B then compares this signal to an 11.8-volt reference. Approximately 40 mV of hysteresis and a small reduction to the reference voltage are added by R216. The result is a logic high at output PFC_z_c when the comparator’s input voltage falls below 11.72 volts. This output remains high until 11.76 volts is reached on the next cycle.

Figure 5-8. PFC Zero Crossing Feedback

GNDA

C2111nF

R220

33k

sense

sense

R50.075 1%

+15V_D

GND

R221

33k

R2184.7k

D910ETS08S

R216 270k

+15V_D

+

-

U203BLM393D

5

67

84

I_Sense_PFC1

D203SM/1N4148

D710ETS08S

D1010ETS08S

PFC_z_c

AC_IN_L2

GNDA

+15V_D

D810ETS08S

R219

33k

R2172.7k

R22310k

R22210k

AC_IN_L1

+5V_D

GND

I_Sense_PFC2




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For More Information On This Product,


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MEMC3PSRHVPSUM/D

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of itsproducts for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in differentapplications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer’s technical experts.Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systemsintended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create asituation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and holdMotorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of,directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding thedesign or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.

© Motorola, Inc., 2000

How to reach us:USA/EUROPE/Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1-303-675-2140 or 1-800-441-2447

JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3-20-1, Minami-Azabu, Minato-ku, Tokyo 106-8573 Japan. 81-3-3440-3569

ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. 852-26668334

Technical Information Center: 1-800-521-6274

HOME PAGE: http://www.motorola.com/semiconductors/

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