Speed Control of DC Motors | GATE Notes & Videos for Electrical Engineering - Electrical Engineering (EE) PDF Download

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1. What is speed control of DC motors and why is it important?
Ans. Speed control of DC motors refers to the ability to vary the speed of a DC motor based on the application requirements. It is important because it allows for the motor to operate at different speeds to meet the specific needs of the system it is a part of.
2. What are the different methods used for speed control of DC motors?
Ans. Some common methods used for speed control of DC motors include armature voltage control, field control, and pulse-width modulation (PWM) control.
3. How does armature voltage control work in speed control of DC motors?
Ans. Armature voltage control involves varying the voltage applied to the armature of the DC motor to change its speed. By increasing or decreasing the voltage, the speed of the motor can be adjusted accordingly.
4. What is field control in the context of speed control of DC motors?
Ans. Field control involves varying the magnetic field strength within the motor to control its speed. By adjusting the field current, the speed of the motor can be changed.
5. How does pulse-width modulation (PWM) control contribute to the speed control of DC motors?
Ans. PWM control involves rapidly switching the voltage on and off to the motor in varying duty cycles. By adjusting the duty cycle, the average voltage applied to the motor can be controlled, thus affecting its speed.
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