PMSM FOC - coil current spikes

Discussion in 'Automotive Electronics' started by Krzysztof Bieda, Jul 25, 2016.

  1. Krzysztof Bieda

    Thread Starter Member

    Jan 5, 2016
    32
    0
    Hello Everyone,

    I have difficulty with motor FOC control.

    Motor nominal velocity is 90RPM.
    Up to 40RPM I observe clear sinewave on current clamp connected to mothor phase.
    When I increase velocity when it increases one spike in current waveform.
    It causes motor to shake.
    13833136_1151754858217702_1082687135_o.jpg 13833404_1151754934884361_1946328060_o.jpg

    Is it caused by PI control ?
    Or maybe it is something else wrong?

    My PI regulation is like that (I gather data by uart on PC):
    curr.png

    Best regards,
    Chris
     
  2. Krzysztof Bieda

    Thread Starter Member

    Jan 5, 2016
    32
    0
    SOLVED.

    Smaller capacitor on current sense
     
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