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Vesc draw less current that it shows

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vic1234
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Vesc draw less current that it shows

Hi just connect vesc firmware based controller to my ebike

I setup my battery amps to 40a as maximum that it can handle 

And vesc rt shows that I draw 40a

But my bms shows that the amps that are been used is like 1a-5a

And of course  the ebike is slow

What I can do to fix it? 

Or what I'm doing wrong

I run the motor configurator

And the input

Is and ebike adc tbrottle

GetItFixed
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Dear All,

I have exactly the same problem with the following conditions:

Custom hardware/firmware using  a modified hw_A200s_v2 header file.
FOC detection parameters done.
10 poles motor at no load running very well up to 60000 ERPM in FOC mode.
ADC Throttle as input.
14s battery and 1.20 A drawn from battery but more that 15 Amps displayed on the motor !
About less that 2 amps really measured on motor phase using a current clamp multimeter.

Current_Test.png

Any explanation will be welcome !

 

vadicus
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Phase and battery amps are not the same thing. 15A phase current at 1-2A battery current is not an unusual situation because that's what buck controllers do, they convert voltage to current. As to why you are pulling only a few amps from the battery is a different question that can't be answered because you provided no details about the hardware, settings, etc. It's like me asking at the forum why I just burped without proving a single clue such as what I ate or drank.

 

 

NextGen FOC High voltage 144v/34s, 30kw (https://vesc-project.com/node/1477)

GetItFixed
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Problem solved: Shunt resistor were 3.3 mOhm instead of 0.33 mOhm
Thanks for answering.