MarkJohnston
10 kW
- Joined
- Mar 25, 2021
- Messages
- 620
My hub motor was working great for about 5k miles. Then I suddenly started having problems. I will send input from the throttle and it will stall. Then it will spin in reverse. It was working fine until a couple days ago. IT feels like the phase sensors are having difficulty trying to figure out which is the proper way to spin. Also the halls no longer work but using a meter detects proper voltage. Halls are fine, just not being used. It might be that I have a little split in the hub axle wiring, but I looked and nothing is shorting. And it's been just like that for thousands of miles. I highly doubt it's that. The bike has been sitting. I have OVERHEATED THE MOTOR BEFORE. I got it REALLY REALLY HOT, burn your skin hot. So it might be that. I haven't tried to plug in different combinations of the phase wires. Not sure if that would help because these controllers don't require it I believe. They don't need to a wire to plug in to learn. It's the voilamart hub motor off ali express. It's a 9c clone.
Ok here is what I have done so far to trouble shoot.
1)shorted phase wires together without power. There is cogging in the wheel.
2) tested hall sensors. They all read correctly between 0 and 5v spinning backwards
3) tested with a known good controller. Still the same problem
4)tested with a model specific computer for error codes. An error code popped up.
5) check for loose connections. I jiggled everything. No dice.
6) Tested with a different throttle. Still problem
7) unplugged everything but throttle computer. Still having problems
This leads me to believe the motor has something going on inside it. I need to crack it open. This video looks like the best way to get it open. I will bang it on a 2x4.
I need to acess the wire side too, but I guess the wire side can just be unscrewed because it doesn't have magnetic force behind it. Like I said I got it really hot a few times. And then I let it sit.
Edit: I was able to switch rotation by unplugging hall sensor, and then switching the green and yellow phase wires. However, the motor still stalls sometimes, and sometimes it even switches back to reverse. Scary. Also the halls aren't working in reverse mode. I haven't tried to plug in the halls with the phase wires switched.
IS it possible that the yellow phase wire shorted on the axle? IT was touching it. There was a gouge in the wiring.
Ok here is what I have done so far to trouble shoot.
1)shorted phase wires together without power. There is cogging in the wheel.
2) tested hall sensors. They all read correctly between 0 and 5v spinning backwards
3) tested with a known good controller. Still the same problem
4)tested with a model specific computer for error codes. An error code popped up.
5) check for loose connections. I jiggled everything. No dice.
6) Tested with a different throttle. Still problem
7) unplugged everything but throttle computer. Still having problems
This leads me to believe the motor has something going on inside it. I need to crack it open. This video looks like the best way to get it open. I will bang it on a 2x4.
I need to acess the wire side too, but I guess the wire side can just be unscrewed because it doesn't have magnetic force behind it. Like I said I got it really hot a few times. And then I let it sit.
Edit: I was able to switch rotation by unplugging hall sensor, and then switching the green and yellow phase wires. However, the motor still stalls sometimes, and sometimes it even switches back to reverse. Scary. Also the halls aren't working in reverse mode. I haven't tried to plug in the halls with the phase wires switched.
IS it possible that the yellow phase wire shorted on the axle? IT was touching it. There was a gouge in the wiring.
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