variable speed

hi is it possible to add variable speed to a 240v ac single phase induction motor?

by ralucard
April 09, 2021

In general, no, it's more trouble than it's worth. I think you'll find commercial single phase variable speed induction motor controllers rectify the single phase to dc then invert the dc to 3 phase ac and use a 3 phase motor. A fundamental problem with the single phase motor is that it must use a starting winding which basically makes it 2 phase to get it moving then a centrifugal switch disconnects the starting winding so that it won't burn out. If you then reduce speed by lowering frequency and voltage the starting winding will be reconnected.

by Foxx
April 09, 2021

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