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MOTOR CONTROLLER

  • US 20130110334A1
  • Filed: 10/26/2011
  • Published: 05/02/2013
  • Est. Priority Date: 10/26/2011
  • Status: Active Grant
First Claim
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1. A motor controller for an electric vehicle including a battery, a converter circuit that boosts a DC power obtained from the battery, an inverter circuit that converts the DC power obtained from the converter circuit into an AC power, a smoothing capacitor provided between the converter circuit and the inverter circuit, and a motor driven by the AC power obtained from the inverter circuit, the motor controller configured to control a drive of the motor by controlling an operation of the inverter circuit,wherein an operating region of the motor that causes a resonance of an LC circuit configured by a reactor of the converter circuit and the smoothing capacitor is set as a resonance region, andwherein the motor controller permits execution of square-wave control of the motor only over a predetermined time period in a case where the converter circuit is not boosting the DC power and an operating point of the motor is included in the resonance region.

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