Download FOUR-QUADRANT CHOPPER DRIVE

DESIGN AND IMPLEMENTATION OF FOUR QUADRANT DC
DRIVE USING CHOPPER
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AIM:
The main aim of the project is to develop a speed control system for DC motor using fourquadrant chopper. Using four-quadrant chopper it is possible to demonstrate forward &reverse
motoring and braking.
PURPOSE:
The purpose of the project is to implement a simple and cost effective process to control the
speed of DC motors using the most popular technique four-quadrant chopper method.
METHODOLOGY:
BLOCK DIAGRAM:
LCD DISPLAY
Power
supply
IGBT
Driver
circuit
AT89C51
Microcontroller
Unit
KEY PAD
1-p AC
Rectifier
IGBT Chopper
MOTOR
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POWER SUPPLY:
Step Down
Transformer
Bridge
Rectifier
Filter
Circuit
Regulator
section
DESCRIPTION:
In this project armature is excited by a variable dc supply obtained from four-quadrant chopper. The
system is provided with various control keys, such as START, STOP, REVERSE MOTORING,
REVERSE BRAKE, FORWARD MOTORING, FORWARD BRAKE, INCREMENT and
DECREMENT. Using these keys, the user can set the motor to run in any one of the following modes,
namely Forward motoring, Reverse motoring, Forward braking and reverse braking. The speed can be
varied by varying the voltage given to the PWM converter (using keypad).
Moreover, the system is provided with Soft start facility i.e., starting the motor without
allowing the armature current to exceed the full load current. The Hardware of this system
includes uncontrolled rectifier using diodes, chopper using IGBT’S, control keys, speed adjust
potentiometer and other logical circuits.
TECHNOLOGY:
There are several applications with dc motors in our daily life. We require different speeds
at different instants depending on the applications. There are several techniques to control the
speed of dc motor; PWM technique is one in those. PWM stands for pulse width modulation.
Pulse width modulation (PWM) is a powerful technique for controlling analog circuits with a
processor’s digital outputs.
SOFTWARE USED:
1. Embedded C
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2. Keil IDE
3. Uc-Flash or ISP
4. Express PCB
HARDWARE USED:
1.
8051
2.
power supply
3.
Keypad
4.
LCD Display
5.
Embedded controller
6.
IGBT Driver circuit
7.
IGBT Chopper
8.
DC Motor
9.
Rectifier circuit
Applications:
1. Motor speed regulation
2. In manufacturing industries
3. Speed control of DC motor
Advantages:
1. Reliable operations at large currents
2. Controls the process
3. Ease of operation
RESULT:
Hence, by using this project we can effectively control the speed of DC motor by using fourquadrant chopper method.
1ST FLOOR, ABOVE ANDHRABANK ATM, OPOSITE TO CHANDANA BROTHERS DILSUKHNAGAR, HYDERABAD-500060
WWW.LOTUSLIVEPROJECTS.COM , EMAIL: [email protected] CONTACT: 040- 40023300, 9700345745
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