speed controller for universal motor

Thread Starter


Joined May 22, 2013
I cant upload a copy of the diagram, so i will do my best to describe it. It is a universal motor with a speed controller. The controller has a potentiometet feeding a capacitor that is used to trigger a diac that turns on the triac. My question is if the rc circut is in series with the motor and parallel with triac, why doesn't the motor run even if triac is shorted open?