Motor Q100C CST broken?

[pcace]

Hi there,

i am very new to the whole ebike game, but i came across an ampler stout ebike for free with a seemingly broken controller.
now that i have kompletely gutted the bike, i have realized that the motor behaves odd (so i think):
- the motor can manually (no esc or hall sensors connectred) spin efortless in one direction. the other direction is quite hard and feels like an electronic break
- when i put 5V / GND on the hall sensor, there are readings, but only in the "hard" to turn direction. the other free spinning direction does not show any readings.

since i am really new to motors like this and i have never hat one in my hands before, i am not sure if this is expected or not. but i am guessing its not.
What could be the problem here and how could i try to fix it without just buying a new one?

Thanks a lot for help!!


PS: its the same motor like here:

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Factory changes for the Q100C .

One of the nice things about the "Cuties" is the ease one can swap different "cores" into one housing. It was with this in mind that I ordered a pair of "201"slow wind motors to replace the two 328 "fast winds" in my 2WD Rocky Mountain. Dropping the front Q100H 201 in place of the standard Q100...

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Cute Q100CST Smaller 42mm Flange Ver Open wt Vice Disc Rotor

I opened up my Cute 100 Q100CST to figure out the number of pole pairs so I could use it with the hall sensors properly with the ebikes.ca Phaserunner controller. This is the newer Black 42mm flange to flange version of this motor. There was a previous version of this out before this that was a...

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[amberwolf]

If it's a geared hubmotor, then from the sound of it it's the typical type with the freewheeling clutch in it. So if you spin it forwards by hand, it will easily rotate because you are not engaging the motor, and there will be ho hall signals.

Spinning it backwards by hand engages the motor and gears, and if there is someting wrong with either one (broken gears, shorted phases or windings, etc) then it will be hard or impossible to turn.

If you get normal hall signals, then the motor is spinning, so the gears are probably not broken, but there could be a phase or winding short. You can't test that with a regular multimeter, as even a working motor is practically a short to it. So you'd have to examine the wiring to the mtoro for any damage, especially at the axle entrance.

 

[pcace]

Hi there, thank you so much for your reply. i just took the whole motor apart to try to understand what is going on and came to exact the same conclusion as you told me! Thanks a lot. I have to admit, i thought something is wrong because i got fooled by chatgpt - it told me it should spin freely in both directions
but hey - the good thing is, that i have now a completely cleaned and re-greased motor
so now back to controller programming !

Thanks again!

 

[E-HP]

Thanks a lot. I have to admit, i thought something is wrong because i got fooled by chatgpt - it told me it should spin freely in both directions

For now artificial intelligence works great with artificial e-bikes. But for real e-bikes, it’s still best to stick with real intelligence.

 

[afzal]

When taking help from LLM's, better to keep in mind that they just do statistical auto complete on sentences

 

[neptronix]

We keep hearing from people here that chatGPT led them astray/
We got good Real Intelligence here, feel free to take advantage of the resource

 

[elias838]

It’s normal for it to spin easier in one direction because of the clutch, but the fact that it feels like braking and only gives Hall readings in that direction is a bit weird.

 

[E-HP]

...and only gives Hall readings in that direction is a bit weird.

This is normal. The hall signal will only toogle if the motor spins, and the motor isn't spinning when rotated in the forward direction because of the clutch.

 

[pcace]

yes - i just needed to understand how the cluch works. from there the behaviour was totally fine for me