final report ppt
TRANSCRIPT
Bengal College Of Engineering &
Technology
Prepared By: Saurav Kumar Singh
Santanu Dhara Kaustav Halder
Jyoti Kumari
Mentor:Mr.Saradindu MondalAsst. Professor,
Dept. of EEE, BCET
Final Year Project Presentation
Dept. of Electrical & Electronics Engg.
TopicSpeed Control of Three Phase Induction Motor
using‘variable frequency
drive’ (VFD)And
Its Applications
PROJECT OVERVIEW
Variable Frequency
Drive
ProgrammableLogic
Control(PLC)
SCADA
What’s VFD.. an Overview !! A system for controlling the speed an Alternating Current (AC) electric motor.
By controlling the frequency of the electric power supplied to the electric motor.
It provides the starting torque control, gradually ramps the motor up to the operating speed to lessen mechanical and electrical stresses, thereby reducing maintenance and repair costs resulting in the increase of instrument life.
Wiring Diagram of VFD
Different Parts of VFD
Rectifier
Soft Charge Circuit
Intermediate Circuit (DC link)
Brake Circuit
Inverter
Pulse Width Modulator
Control And Regulation Section
Rectifier Section
This section is used to change the incoming power from AC to DC.
Soft Charge Circuit
A Part of Rectifier Section. Used to power up the Variable Frequency Drive.
Intermediate Circuit
Acts as a power storage facility for the next section, the INVERTER
section.
Inverter Section
Takes the voltage from the DC bus and using PWM sends a signal which
appears to motor as AC.
Brake Circuit
Used as Dynamic Braking with devices that need to stop or change direction
quickly.
Pulse Width Modulator
The waveform that goes to the motor shows the switching frequency of IGBTs. This switching pattern is known as Pulse Width Modulation.
Control & Regulation
Coordinates and regulates signals
inside the drive.
Monitors AC motor Current.
Input & Display Panel
Input Parameters
High Speed
Low Speed
Forward Motion
Reverse Motion Accelerating Time
Deceleration Time
Block Diagram of Model
Contactor 1 VFD Contactor 2
Motor
Star-DeltaStarter
PLC controlled VFD A device invented to replace the necessary sequential relay circuits for the machine control.
The user enters the program, usually via a software, that gives the desired results.
Saves money and time, so almost any application that needs some type of electrical control has a need of PLC.
PLC operation
PLC capabilities
SCADA overview Enables user to collect data and send
control information to the central server.
Employs both data acquisition and telemetry.
consists of collecting Information, transferring it to the central site, carrying out necessary control & analysis, and then displaying the data on a number of operator screens.
Industrial Application
Experimental Setup
End of presentation
# SMEClabs, Kerala # Dept. of EEE, BCET, Durgapur