In article , Robert Swinney says...

It seems to me you may be describing an idler driven by a pony motor,
similar to systems in which the pony is disconnected after the idler has
come up to speed. Could this be the case you're describing, except that the
pony motor is not disconnected after the starting interval?

Dan's comments there are about deliberatly driving the idler motor
at above slip speed. It will behave like an alternator at that point
and deliver the mechanical power that is entering the shaft to the
electrical load.

Jim


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