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My ebike motor powers down randomly
(lemmy.ca)
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this post was submitted on 07 Aug 2023
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I'm definitely no expert but I've owned a mid drive for a few years. It could possibly be the nylon gears transferring power from the motor to the bike's gears- that happened to me early on. I'd go full throttle from a dead stop and eventually the gears sheared and binded.
Otherwise, depending on the actual sound it could be the driver fets or the motor itself. Can you post a short video or audio clip of it happening? Also does it only happen under load or can you trigger it with the back wheel off the ground?
The bike is in the shop for a separate reason but when it’s back I’ll test it out. What would it mean if it only happens under load or not?
If it only happens under load, that would make me suspect the motor driver. It sounds like the circuitry isn't able to handle much current anymore, which would cause it to basically lock itself out for safety, until it's power cycled. Most likely such a scenario isn't communicated to the display.
Under load would refer to when you're on the bike and activating the motor vs lifting the rear wheel of the bike off the ground and activating the motor.