A year ago, my electric scooter with 8Kw 13" hubmotor cought fire during the night while charging.
To make a long story short: all is lost, exept the hubmotor.
Now i found the courage to test it, and the windings seem to be o.k.
The halls act really erratic, couldn't explain it...
So, i opened up the motor, and discovered something curious: About 3 quarter of the magnets seem to have lost its magnetism...
Now, i know when heating a magnet it loses its magnetism, but the wires were still o.k (up to 3 inches from the axle, the rest is molten)
I figure: when the halls are okay, how hot can the motor have been??
I sometimes see here coils of hubmotors that are burnt coffee-brown... How hot must that have been?
Are there any other tests that i can do to check magnetism?
Can i replace the magnets? (where to buy, its a chinese alibaba motor...)
Can i get them out? (anyone here tried?)
All questions, i know...