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From: mlevin@jade.tufts.edu
Newsgroups: sci.physics,sci.electronics
Subject: does a motor's magnet get re-charged when the moror is running??
Message-ID: <1991May7.204905.13057@athena.mit.edu>
Date: 7 May 91 20:49:05 GMT
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   I have just picked up my CD player from the repair shop, and the
repairman said the motor was bad. His exact words were that "the
motor's magnetic field had collapsed" and he said that this can come
from low use of the machine, and that when the motor is running, the
magnets inside of it get "re-charged". This sounds rather odd to me.
Is this really true? Do the permanent magnets inside a small motor get
stronger as the motor is run, and, can they de-magnetize spontaneously
over a period of 2 years?

I'd appreciate any replies and explanations, to mlevin@jade.tufts.edu.

Mike Levin