PMSM FOC control -inputcurrent fluctuation

Discussion in 'Automotive Electronics' started by Krzysztof Bieda, Jul 19, 2016.

  1. Krzysztof Bieda

    Thread Starter Member

    Jan 5, 2016
    32
    0
    Hello Everyone,

    I have difficulty that my BLDC controller, that my input current is fluctuating.
    Is it PI control fault of should I add any current filtration on input?

    My scope readings:
    20160719_154017.jpg

    My algorithm performance( from my PC program):
    PI control.PNG

    Best regards,
    Chris
     
  2. ci139

    Member

    Jul 11, 2016
    341
    38
    i only assume the ringings correspond to your transition edges ? drive has insufficient power to drive your load? secondary inductance from rotor?
    don't buy me - this is not something i'm familiar with (i don't like zero responces)
    the driver- & coilwiring- diagrams would tell the rest of the story here
     
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