Study of DC motor and its speed control by pulse width modulation (PWM)
Outlook
Objective
Introduction to DC motor
Operating principle of DC motor
Operating principle of dc motor by graphical method
Equivalent circuit diagram of DC motor
Construction of DC Motor
Why speed control of DC Motor is necessary
Literature survey
2. ARMATURE VOLTAGE CONTROL
3. SUPPLY VOLTAGE CONTROL
Pulse Width Modulation (PWM)
PWM generation
Speed Control by PWM
Benefit of Pulse Width Modulation (PWM)
Comparison of flux control, armature control & pulse width modulation(PWM)
Conclusion

3. SUPPLY VOLTAGE CONTROL
Pulse Width Modulation (PWM)

Both the above mentioned methods cannot provide speed control in the desirable range
Whereas the armature control method involves huge power loss due to its usage of resistor in series with the armature
Therefore, a different method is often desirable – the one that controls the supply voltage to control the motor speed is PWM