Obsolete media (was: Whats the screwiest thing you

From: Allison J Parent <allisonp_at_world.std.com>
Date: Sun Nov 28 21:58:27 1999

<There's always the well-known kludge method. You get a 3-phase motor
<somewhat larger than the one you want to run (any such induction motor
<should work). You energise one winding from single-phase mains, using a
<capacitor to generate enough phase shift to another motor winding for it
<to start and run. Then use all the motor terminals as a 3-phase output to
<the motor you want to run. Effectively this new motor becomes a rotary
<converter.
<
<I assume the motors in disk drives are not that large, so this may well
<work. It's certainly been done for (small) lathe motors.

I've seen this done for motors in the 3-5HP range!

Allison
Received on Sun Nov 28 1999 - 21:58:27 GMT