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post #42 of (permalink) Old 04-29-2009, 10:15 PM
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Yep, motors generate electricity while they are running too. Thatís what keeps them from burning up. Itís back EMF, a current in the opposite direction to the current applied. That reduces the net current.

From your description, I expect that was a permanent magnet motor but it didnít have to be to act as a generator. There would be enough residual magnetism from hysteresis to start generating current then it would start providing itís own field current.

I didnít address this in my previous post
Originally Posted by RRich View Post
Black as ground - Not just battery operated devices, TVs, radios, computers, aircraft, spacecraft, industrial machines, etc. often use black to signify a ground or return.
Henceforth, please make it clear if you are referring to earth ground , chassis ground , signal ground , or some other kind of ground. It can be confusing otherwise.

There are 10 kinds of people in the world.
Those who understand binary and those who don't.
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