motor speed controler

iam a trainee and i hope u can help me to develope and improve my information in electrical &electronics.
can we control the motor speed(single phase) by using dimmer switch & whow.

Posted by hamam on 28/05/2003, at 12:43 GMT

re Motor speed control

The answer is No - a dimmer operates by chopping up the a.c. waveform to allow less power through to the light. This still leaves the 50Hz frequency component of the waveform. Since the speed of an standard a.c. motor is governed by the frequency - the action of the dimmer will not affect the speed. There are a.c. motor speed control circuits but these use different techniques.

Posted by interak on 12/07/2003, at 11:40 GMT