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Old 11-01-2007, 05:22 AM
oldred oldred is offline
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On an AC motor it is not as simple as cutting down the voltage and if you do that it will cause the motor to overheat. A DC motor will run fine on lower voltage and that is why DC is used when a variable speed motor is called for on most machinery. An AC motor speed controller, although fairly simple, is quite a bit more than just a light dimmer which is nothing more than a rheostat and a light dimmer should never be used to control the speed on an AC motor, it can cause damage to the motor. I have one of those HF motor controllers and although it will reduce speed it also reduces the power a LOT.
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