ac is to powerful, need help asap!!!!!!!!!!!1

i bought a dimmer switch for a 110v motor. i hooked it up and turned it on, it went to fast for what i need it to and it was on the lowest setting. it is a 600w slide dimmer switch. is there any way i could make it slower?

NachoMahma9 years ago
. You need to supply a variable frequency to the motor. Your wall dimmer doesn't do that. Search for Variable Frequency Drive (VFD).
If it's short term solution that the electronics are likely to survive for a bit then grab some gears and just gear it down a bit, also if it's for a van de graaf then is the speed that important, also it may go much slower once under load...
Goodhart9 years ago
it is the old problem that it isn't a good idea to run anything using inductance off of a straight potentiometer.

The reason: a resistor (and a pot is a variable resistor) alter current, not voltage. The task is to generate a variable voltage and frequency power supply from a fixed voltage and frequency power supply (such as a wall-outlet power supply).

If you are going to vary the voltage, and thus the speed you need more electronics, not more resistance.

Here is a straight-forward link to an explanation of three ways to do this.