This is the guts of a 16″ 750W brushless hub motor from an X-Treme scooter that I’m pulling apart to see if I can get it rolling again. The motor first chattered, with little or no power, then stopped altogether. I was thinking the Hall sensors got cooked when the wires feeding into the axle got mashed, since I was told the frayed wires were repaired but once I got it opened up I saw that some wires were bare, and shorting to the axle.
The first order of business will be to repair the wires. After that, I think I should test the Hall sensors to figure out if they are indeed fried, or if it was just the wiring. In any case, it should be pretty straighforward, and a chance to beef up the input wiring a bit.
This is the rim, and the magnets around the inner hub, which is the outer ring of the motor itself. Here is a closeup of the magnets.
Here’s the inside with the windings. you can see the Hall sensors in the upper right.
The Hall assembly, and the hold-downs:
A detail of the Hall sensors:
Finally the back side showing the cabling snaking through the axle, then through the rotor to the sensor side: