Speed Control Of DC motor Using Pulse Width Modulation

Guided By:Ms.Hemlata Verma

Ajad kumar(1021521004)

ABSTRACT The project reveals the digital closed loop

control system for speed control of DC motor using PWM technique. In present days the power semiconductor devices have completely revolutionized the control of drives especially in the area of control usage of thyristors igbt’s power MOsFET etc., was increased

The digital circuit can be interfaced to microcontroller. So that the speed can be controlled by Microcontroller there by making speed control of DC motor even more easily. Pwm technique to the digital circuit drives the component correspondingly speed will change.

Introduction Of PWM Pulse - an electromagnetic wave

or modulation thereof of brief duration

Width Modulation - to adjust to or keep in proper measure or proportion the width of the pulse with respect to the frequency of the wave

Introduction of Pulse width modulation

Different types of waves: sine, square,

sawtooth, trianglePWM uses square

waves Discrete on / off

values

CLASSIFICATION OF DC MOTORS

1 POWER SEMICONDUCTOR DEVICES CLASSIFICATION

Diode symbol and V-I characteristics

DC motor speed control using PWM method

Block Diagram Of Power Supply

Block Diagram Of Speed Controller

Architecture of 89C52

BLOCK DIAGRAM

CIRCUIT OVERVIEW

Speed control of dc motor with PWMAdvantage:The motor consumes less powerSignificantly less energy loss due

to heatAllows finer motor controlDisadvantages:Shortens the life of the motor by

putting more stress on the fan bearings

and windings