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ELECTRIC VEHICLE POWER CONVERSION SYSTEM

  • US 20150097426A1
  • Filed: 09/04/2014
  • Published: 04/09/2015
  • Est. Priority Date: 10/04/2013
  • Status: Active Grant
First Claim
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1. An electric vehicle power conversion system, comprising:

  • a motor driving power system to output a DC voltage from a DC main power supply to a motor generator through an inverter circuit; and

    a control circuit to control the motor driving power system, wherein;

    the motor driving power system is to connect a smoothing condenser for smoothing the DC voltage, a resistor, and a semiconductor switch element in series,the motor driving power system includes an exclusive discharge circuit to discharge stored charge from the smoothing condenser,the control circuit includes a discharge controller to simultaneously turn on a first set of upper and lower arms when a failure of the exclusive discharge circuit is detected, the upper and lower arms including power semiconductors of the inverter circuit, andthe discharge controller to discharge the stored charge from the smoothing condenser through parasitic resistance components of the upper and lower arms.

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