Invention Grant
US08098039B2 Generator motor driving device and method for discharging charges from capacitor of generator motor driving device 有权
发电机马达驱动装置及发电机驱动装置电容器放电的方法

  • Patent Title: Generator motor driving device and method for discharging charges from capacitor of generator motor driving device
  • Patent Title (中): 发电机马达驱动装置及发电机驱动装置电容器放电的方法
  • Application No.: US12450063
    Application Date: 2008-03-13
  • Publication No.: US08098039B2
    Publication Date: 2012-01-17
  • Inventor: Takayoshi EndoTomohisa Sato
  • Applicant: Takayoshi EndoTomohisa Sato
  • Applicant Address: JP Tokyo
  • Assignee: Komatsu Ltd.
  • Current Assignee: Komatsu Ltd.
  • Current Assignee Address: JP Tokyo
  • Agency: Edwards Wildman Palmer LLP
  • Priority: JP2007-063915 20070313
  • International Application: PCT/JP2008/054644 WO 20080313
  • International Announcement: WO2008/111649 WO 20080918
  • Main IPC: H02P1/46
  • IPC: H02P1/46 H02P3/18 H02P6/00
Generator motor driving device and method for discharging charges from capacitor of generator motor driving device
Abstract:
The present invention provides a generator motor driving device that can promptly perform discharging of charges from the capacitor during a maintenance operation, and a capacitor discharge method to be implemented in the generator motor driving device. Power is supplied from the capacitor to the generator motor being driven by the engine, and the generator motor is driven, with the engine as a load. Rated constant current control is performed on the generator motor, and rated constant voltage control is performed on the booster, until the capacitor voltage decreases to a first voltage. After the capacitor voltage decreases to the first voltage, the rated constant current control is performed on the generator motor, and voltage control is performed on the booster to maintain a predetermined ratio between the capacitor voltage and the booster output voltage to be output to the driver, until the capacitor voltage decreases to a second voltage that is lower than the first voltage.
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