Speed Control of Induction Motor - AC Motor Speed Control Methods

An induction motor is basically a constant speed motor, that means, for the entire loading range, change in speed of the motor is quite small. Speed of a DC shunt motor can be varied very easily with good efficiency, but in case of Induction motors, speed reduction is accompanied by a corresponding loss of efficiency and poor power factor. As induction motors are widely being used, their speed control may be required in many applications.

Different speed control methods of induction motor are explained below.
Following are the May two type of controlling arrangement which need to consider by controlling Induction motors.

Speed control with respect to stator side of the induction motor.
Speed control with respect to rotor side of the induction motor.

The speed control of induction motor by considering to control on stator side can also subdivide into several speed controlling methods such as.

By changing the supply voltage of the motor.
Changing the stator pole numbers of the motor.
Changing the frequency of the supply side of the motor.

The speed control of induction motor by considering to control on rotor side can subdivide into several speed controlling methods such as.

Adding an external resistant into rotor side circuit.
Applying cascade connection.
Injecting emf into rotor side circuit of the motor.

If you want to learn about Speed Control of DC Motor,
checkout my another video:- https://www.youtube.com/watch?v=BXMtnP-gf5s

More Detail:- http://www.learningengnr.com/speed-control-induction-motor-ac-motor-speed-control-methods/

https://learningengineering1994.blogspot.com/2017/12/speed-control-of-induction-motor-ac.html

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