Greg Postma wrote:

Looking at VDFs available on Ebay, it appears that the input on some of
them are single phase and some are 3 phase, but all VDFs have a 3 phase
output.It appears to me that one could use (a properly rated) VDF
instead of a phase converter to convert 230v single phase to 3phase at
230v or 460v. Am I correct?

The VDFs listed on Ebay are for fractional horsepower all the way up to
50 hp and higher. Does the VDF rating have to match the HP rating of the
motor, or could one use a VDF rated at 3 hp to drive a smaller motor
like a 1 hp motor? I know that it would not be a good thing to use a VDF
rated at 3hp to run a 25 hp motor.
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