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Power converter and controller using such power converter for electric rolling stock

  • US 7,977,819 B2
  • Filed: 08/09/2006
  • Issued: 07/12/2011
  • Est. Priority Date: 08/09/2006
  • Status: Expired due to Fees
First Claim
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1. A power converter comprising:

  • an inverter that supplies a load with electric power;

    a capacitor connected between DC terminals of the inverter;

    a power supply switch provided between one terminal of the capacitor and a power collector;

    a power storage unit that stores DC power;

    a DC-to-DC converter having a reactor and at least one pair of switching elements connected in series for charging the power storage unit with electric power and discharging electric power from the power storage unit, the DC-to-DC converter being connected in parallel with the capacitor; and

    a bypass switch that connects the power storage unit in parallel with the capacitor, without the intermediary of the at least one pair of switching elements of the converter.

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