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Current became not stable over time

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Mon, 2022-07-25 23:21
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AnthonyFR
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Current became not stable over time

Hi,

I am user an older original 4.12 hardware on a ebike with BionX rear motor and 48V battery.

It works pretty well, but after 15 to 20 minutes the motor seems bugging a little bit, current is not stable anymore.

Any idea to investigate this issue ?

Thanks

Anthony

 

Image : https://ibb.co/zVPyDR0

 

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Wed, 2022-07-27 20:35
frank
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Joined: 2016-12-27 20:19
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Motor is getting warm, resistance changes and is out of the 5% accuracy needed to drive FOC. You can increase the resistance value a bit to the top side (add 2% resistance). Or add a temp probe and activate temp compensation.

 

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