G310 + Grinfinoon controller problems

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alfy22   1 µW

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Posts: 4
Joined: Nov 23 2018 4:37pm

G310 + Grinfinoon controller problems

Post by alfy22 » May 20 2021 3:43am

Im having issues with my e-bike build and G310 motor. I have a Grinfinion 20A controller and my build is set up with pedal assist. I use my ebike as a daily commuter and everything had been working great going on 3 years, but now when I pedal, the motor just shudders and then I lose all power. I have ruled out battery and PAS issues. Checked controller mosfets for shorts and that all seems ok although the resistance on one phase wire was less than the others, around 2kohm. I assumed this was ok or could this be an issue?
I disassembled the motor and noticed what looked like a bit of corrosion on the stator and coils - nothing major, see pictures - a bit of white oxidation on the outside and rust on the inside of the coil casing. otherwise everything looked ok including hall sensors.

Could water have damaged the motor - any way I can confirm the motor is fried and its nothing else? Could this be the issue and is it fixable/replaceable or do I need to replace the entire motor? I live in Norway and use the bike year round in pretty harsh conditions- rain, snow, salted roads etc so it would not surprise me but expected it to last longer…

Thanks for any help
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pwd   10 kW

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Posts: 528
Joined: Oct 11 2011 12:01pm
Location: Ontario, Canada

Re: G310 + Grinfinoon controller problems

Post by pwd » May 20 2021 8:01am

Have you tested the motor's hall sensors? Do you have a throttle you can test the motor + controller with?
2WD Commuter/Street Build viewtopic.php?f=6&t=98286:
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Magic Pie 4 front w/ Infineon 4 Clone @ 70A phase + Leafmotor 1500 rear w/ Infineon 4 Clone @ 200A phase
Samsung 40T 14S7P

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2019 Rocky Mountain Blizzard 20
Cyclone "3kw" 13T motor to 36T chain ring then 32T chain ring to 11T-46T Cassette @ 100A phase
Molicel P42A 21S3P

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TommyCat   10 kW

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Posts: 520
Joined: Jan 22 2018 8:05pm
Location: North-west Illinois, USA

Re: G310 + Grinfinoon controller problems

Post by TommyCat » May 20 2021 8:52am

You may find this thread on how to check your BLDC motor's windings and hall sensors helpful...

Testing BLDC motor's Phase Wiring - Hall Sensors and Wiring.

See my completed Magic Pie V5 rear hub E-Bike build Here!

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