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High Current Sampling Mode True 80% current

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Sun, 2017-09-24 21:14
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antonchromjak
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High Current Sampling Mode True 80% current

Hi,

I tried FOC - Advanced option - High Current Sampling Mode - True and for the same speed and motor setup I get different I Batt and I Motor.

 

High Current Sampling Mode - False

ERPM : 46768.0

I Motor: 2.33 A

 

High Current Sampling Mode - True

ERPM: 46699.0

I Motor: 1.85 A

 

Can you replicate this on VESC6 or is it only issue with my custom board?

Thanks in Advance

 

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Wed, 2017-09-27 17:45
RSR
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So the deviation (as fraction of range) is only (2.33-1.85)/180, that is less 0.3% -- next to nothing!  

Idle currents are anyway less important.  Current under load can be more difficult to test in a reliable way.  E.g.: use foc_openloop combined with realtime-log and preferably also external amperemeter connected to oscilloscope.

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Wed, 2017-09-27 19:59
antonchromjak
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I got two motors connected with shaft. One shorted same test at 1500erpm. 

 

High Current Sampling Mode - False

ERPM : 1496.0

I Motor: 15.09 A

 

High Current Sampling Mode - True

ERPM: 1501.0

I Motor: 14.76 A

 

So you are right.

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