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MOTOR DRIVE APPARATUS AND POWER STEERING APPARATUS USING THE SAME

  • US 20110156623A1
  • Filed: 12/23/2010
  • Published: 06/30/2011
  • Est. Priority Date: 12/25/2009
  • Status: Abandoned Application
First Claim
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1. A motor drive apparatus for driving a three-phase AC motor by DC power of a DC power source, the motor drive apparatus comprising:

  • a plurality of inverters for converting the DC power of the DC power source into AC power and supplying the AC power to the three-phase AC motor;

    a phase current detection section configured to detect three-phase currents supplied from the plurality of inverters to the three-phase AC motor;

    a 3-2 phase conversion section configured to convert phase current detection values of each phase detected by the phase current detection section into a d-axis current and a q-axis current;

    a current control calculation section configured to generate representative two-phase voltage command values based on detection values of the d-axis current and the q-axis current outputted from the 3-2 phase current conversion section and command values of the d-axis current and the q-axis current; and

    a 2-3 phase conversion section configured to generate three-phase voltage command values from the representative two-phase voltage command values,wherein numbers of the 3-2 phase conversion section and the 2-3 phase conversion section are less than that of the inverters.

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