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Unread 15-03-2011, 17:38
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Join Date: Feb 2011
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Re: Fixing Burnt Motors

Lots of smoke suggested that this motor would never make full torque again, so I didn't mind trying something different when repairing it. I picked a higher-current rated 3.9uH inductor, J.W.Miller (now Bourns) p/n 5800-3R9-RC, got it from Digi-Key, their number is M8276-ND. Its rated current is 1.28A, at which it will heat up 35C. Physically this part is larger than the original, but there is just enough room if you mill the groove/divot in the plastic, make the groove a bit longer. I got the motor to run again, but sure enough it uses a lot more current than a new motor even with no load. So this motor won't be going on any bots again.