Torque ripple cancellation algorithm involving supply voltage limit constraint

  • US 10,135,368 B2
  • Filed: 10/01/2016
  • Issued: 11/20/2018
  • Est. Priority Date: 10/01/2016
  • Status: Active Grant
First Claim
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1. A system for reducing a torque ripple cancellation command, the system comprising:

  • a current regulator that provides motor voltage commands to a motor;

    a torque ripple cancellation module that generates a torque ripple cancellation command based on input currents to the current regulator;

    a ramp-down command generator module that provides a ramp-down command to the torque ripple cancellation module, the ramp-down command is based on a voltage saturation indicator; and

    a voltage saturation indicator generation module that generates a voltage saturation indicator signal, the voltage saturation indicator is based on a supply voltage signal and a motor voltage command;

    wherein the ramp-down command is dependent on a first threshold and a second threshold and the ramp-down scale factor is linearly reduced as a function of a voltage saturation indicator signal.

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