Speed control of dc motor using pulse width modulation
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Transcript of Speed control of dc motor using pulse width modulation
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