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wrong amps reading (realtime data)

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flez1966
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Joined: 2024-03-16 14:49
Posts: 7
wrong amps reading (realtime data)

finally off the bench and on the street, pulled away slowly all good, decided to try a little faster, and yes a little faster.....a very little...

vesc app shows 70-90 amps, watts shows 5-600, battery is about 75v....even the math doesnt work... 

Bms app shows about 7a, and 500w, it doesnt even match acceleration to the 350w folding but I guess its 4x as heavy.

makerbase new 84200hp v1/a, 20s/84v, mxus 3k turbo

 

TheFox
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Last seen: 6 months 2 days ago
VESC Free
Joined: 2024-01-06 08:36
Posts: 4

I have a similar problem.
System voltage is 72V. The VESC app shows about 350W power at 29A current. Since one of the values cannot be correct, I put my clamp ammeter in the line to check and measured a current of approx. 5A, which matches the power of 350W.

I would suggest an incorrect setting, but then I wonder why VESC does not record the actual measured data. So a hardware error after all?

 

B1996
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Last seen: 1 week 6 days ago
VESC Platinum
Joined: 2022-10-07 15:44
Posts: 3

To both of you, that is motor side/phase amps

When your motor is running below 100% duty cycle, (always), your battery current is Motor amps x Duty cycle (0.5 for 50%)

the MXUS 3K turbo is known to like a Lot of current, up that to 150 or 200 on the motor current and it will become alive

that is because these controllers are basically smart 3 phase inverters and buck converters in one, at lower speeds your motor voltage is lower aswell