Re: Solving the Oil Pump Problem - Packard V8

Posted by HH56 On 2009/3/15 13:49:56

Unless you have a universal motor you are not going to be able to regulate the speed of a standard 2 wire AC synchronous motor without some kind of inverter to modulate pulse width and frequency. Even then it may be difficult because most inverters work usually with 3 phase motors. Your best bet would be to find a different motor.

Synchronous AC motors are designed around 50/60hz for their speed (usually 1725 or 3600 in US). Those that vary speed like 2 or 3 speed air conditioner have selectable or multiple windings which vary the number of stator poles. While lowering the voltage may reduce speed on the type you have, it does this by reducing power and efficiency and increasing heat to the point motor may give up. There are small inverters available but usually not that cheaply and usually limited to not much more than a ceiling fan type motor.

Universal motors have brushes and can vary speed by varying voltage. Drills, vacuum cleaners, sewing machine or DC motors are usually universal.