View single post by Samurai Appliance Repair Man
 Posted: Wed Apr 6th, 2005 09:45 pm
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Samurai Appliance Repair Man

Joined: Mon Mar 21st, 2005
Location: Otterville, New Hampshire USA
Posts: 16083
It's overheating under load; in other words, when the motor is having to actually do some work, rather than just freewheel.  That's a typical failure mode for motors.  As for why, it's due to loss of magnetic flux (hysterisis loss) and excessive current draw from insulation breakdown on the aramture winding-- both contribute to overheating.  Some excellent background on electric motor theory here, if you're interested.

Last edited on Wed Apr 6th, 2005 09:45 pm by Samurai Appliance Repair Man

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