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Variable frequency drive circuit

B

Ben

Is there anyone able to obtain the schematic for variable frequency drive on
single phase motor?
 
I

Ian Stirling

Ben said:
Is there anyone able to obtain the schematic for variable frequency drive on
single phase motor?

It's decidedly non-trivial, and probably not doable for what you can
buy one for on enbay.

The basic idea is to rectify the incoming line, and then use PWM to
synthesise a sine wave at the desired frequency.
It would be quite likely that you'll exceed the cost of a suitable unit
in only the driver transistors you go through finding a circuit that
won't blow them.
 
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