Quote:
|
Originally Posted by greenman100
you don't really want to do this.
Speed of AC fans are meant to depend on frequency, not voltage
|
Fans use shaded pole motors, they don't run at exactly the line frequency but have a certain amount of slip. The shaded pole design is a tradeoff of efficiency for easy startup and higher starting/ low rpm torque. There is no problem running AC fan motors undervoltage, it's done all the time. Ever seen a ceiling fan speed control? Using a transformer does the same thing, just gets rid of the buzz.