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Given zero speed, the motor still rotates

user4708725
Expert 1030 points

Evaluation board:  drv8301-hc-evm revd

Lab 10a Overmodulation

When CTRL_setSpd_ref_krpm(ctrlHandle,_IQ(0.0));the motor still rotates,

I can't improve the effect by adjusting PI parameters. Please give a solution. Thank you.

  • 0
    TI__Guru** 116920 points

    That's right since the sensorless FOC is difficult to estimate the position and speed during the zero or very low speed, so the feedback will be always vibrated. You may disable the speed close loop if you want to keep the motor at zero speed, or you should use sensored-FOC if you want to achieve a good performance at zero or low speed.