I have a 1 HP 3 ph motor that I don't want & nobody else does either. I
also have a VFD that will go to 400 Hz. The recent discussion about the
rpm limits of motors prompts me to see what happens.

So I'm gonna' hook up the motor, crank the VFD to 400 Hz & stand back!
But I thought that I'd give you guys a chance to make predictions. What
do you think will happen?

Bob

Oh - the motor is 1755 rpm @ 60 Hz = 10500 @ 400. It is older & dirty
inside. The bearings? I dunno - it spins pretty easily.