AC Induction Motor Speed Control Methods.

The Speed of Induction Motor is changed from Both Stator and Rotor Side. The speed control of three phase induction motor from stator side are further classified as :
1. V / f control or frequency control.
2. Changing the number of stator poles.
3. Controlling supply voltage.
4. Adding rheostat in the stator circuit.
The speed controls of three phase induction motor from rotor side are further classified as:
1. Adding external resistance on rotor side.
2. Cascade control method.
3. Injecting slip frequency emf into rotor side.
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[@ishanmadushanka3709]

Please reply me its a very help .. i want to control speed of 0.75 HP water pump motor to make coconut scraper .
Can i use 220v 4000 W SCR voltage regular module ?
Please tell me ....

[@onlinetechnicalstudyforeng5503]

Yes
You can

[@gagankumarsinghal6222]

Singal phase half hp 220 v capacitor start induction motor me dimmer se speed control kar sakhe hai kya

[@onlinetechnicalstudyforeng5503]

You can do for a very short time.
You have to install a frequency controller to control the speed.

[@gauravbhaskar100]

Can I control speed of 1hp motor by scr voltage regulator?

[@onlinetechnicalstudyforeng5503]

Yes..