Quote:
Originally Posted by Bill_B
My surgery on one of our two dead motors was done in a similar fashion. A wire replaces the inductor now. Incidentally, the burned hulk must have iron in it somewhere because it was attracted to the motor's permanent magnet as I cut it loose. When you reinsert the armature and brush-bearing end plate, you have to be careful that the magnets don't just snatch the armature away from you. It will separate the two pieces quickly. I devised an alternate re-assembly method, but that's another story.
After reassembly, a power test had the motor spinning for about 10 seconds before it blew a 5A fuse. Current measurement with another fuse in place showed over 7A current for the free-running motor. The armature coil wires looked OK or I wouldn't have attempted reassembly. My theory is that wires on the armature deep inside have cooked off their insulation making this motor useless for testing even in its "repaired" condition. siiiiigh.  Maybe the other motor will be repairable while I await replacements from pitsco.
At least I now have gears to play with.  |
Bill,
We have smoked 3 motors, but they all have partial power still. I measured one with a 4.5 volt input and measured the torque. It scales to about a 45% torque of a new motor. So I suspect that we cooked some windings.
Will a burnt inductor possibly allow partial torque or is the motor a brick with this condition?
If we do have partial torque, then is is likely any repair can be effected?