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In article . net,
says...

"Karl Townsend" remove .NOT wrote in
message ink.net...
VFDs would replace the phase converter need. As a rule of thumb you can
run a VFD up to twice the motor rated RPM. I've done it on several motors
and nevere has a problem. Yes, power goes down porportional to RPM.

BTW, you'd LOVE a VFD on that mill also.

So does this mean that a 1140 motor becomes 2280 RPM motor? At twice the
power?

No, if the drive is set to match the motor's nameplate, the motor will
deliver constant torque up to nameplate speed and constant HP above.

Ned Simmons