harry wrote in news:50012bf3-948b-4018-96d0-
:

As some-one else has said with such limited technical knowledge as
you have, you are on to a no-goer. There is no such thing as a DC
motor/generator, they all run on AC.

I think you're wrong. I've seen a treadmill motor that was definitely a DC
motor. Sure, you plug the treadmill onto the AC mains, but the motor is a
DC motor. It said so on the spec plate.

Al