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POWER CONVERSION DEVICE

  • US 20110121661A1
  • Filed: 07/23/2009
  • Published: 05/26/2011
  • Est. Priority Date: 07/24/2008
  • Status: Active Grant
First Claim
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1. A power conversion device comprising:

  • an inverter circuitincluding a plurality of single-phase inverters which each include at least one semiconductor switch device and a DC voltage source and which are connected in series at their AC sides, andhaving an AC side connected in series to an output of a DC power supply thereby to superimpose a total sum of outputs of the single-phase inverters onto an output of the DC power supply;

    a smoothing capacitor smoothing an output from the inverter circuit which is connected to the inverter circuit in its subsequent stage via an element for switching between conduction and non-conduction; and

    a shorting switch which has one end connected to the inverter circuit, and the other end connected to a negative terminal of the smoothing capacitor, whereinDC/DC conversion is performed by utilizing charge/discharge of DC power in the inverter circuit.

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