Induction motor speed control


Thread Starter

David Young


I'm hoping someone here who has experience in the induction motor motor speed control can help me with a circuit. I need to reduce the speed of a motor in an EIKE 16mm film projector from it's standard 24fps to 16fps. The motor appears to be an induction motor with 300V/4 micro farad capacitor attached. No nameplate or other markings.

Any ideas?

Please respond via this list, or directly to [email protected]

Many thanks for any and all help.

Hi! Circuitry for the induction motor speed control is complicated. Basically it controls the frequency supplied to the motor. It may be worth considering replacement of the motor with a DC motor where the speed can be controlled by varying the voltage.