speed controller for a shaded pole motor

[indrajith]

please send the above titled circuit

 

[MikeMl]

Bad idea. Shaded pole motors are designed to run at just one speed which is synchronous with the 50Hz or 60Hz power line frequency.

 

[crutschow]

I have used a light dimmer circuit and also a series capacitor to reduce the voltage to shaded-pole fan motors to reduce their speed. (The dimmer circuit can genrate a buzz in the motor so for quiet speed reduction use a non-polarized capacitor in series with the line). The speed control is rather non-linear with voltage, but the motors operate fine under those conditions.

Shaded pole motors are induction motors and normally operate at near synchronous speed, but will continue to operate with a large slip at a lower speed if you reduce their voltage.