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Bidirectional battery power inverter

  • US RE45,069 E1
  • Filed: 06/29/2012
  • Issued: 08/12/2014
  • Est. Priority Date: 05/20/2005
  • Status: Expired due to Fees
First Claim
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1. A bidirectional battery power inverter with a DC-DC converter circuit element, to which a battery may be connected, for generating an AC output voltage from a battery DC voltage of the battery in a discharge mode of operation and for charging the battery generating an DC output voltage from an AC voltage in a charge mode of operation, said the power inverter including comprising:

  • a DC-DC converter circuit element comprising a resonant circuit comprising an HF transformer that forms a resonant circuit together with and a resonant capacitor,characterized inthat wherein the HF transformer comprises two primary windings with a center tap on its primary side, said the center tap being connected to a power electronic midpoint circuit with semiconductor switches, a secondary winding to which the resonant capacitor is connected in series being provided on the a secondary side,;

    that a DC-AC converter circuit element is provided which lies disposed on the an output side of the power inverter and comprises;

    a boost or buck chopper that is connected between the DC-DC converter circuit element and the DC-AC converter circuit element;

    andthat a resonant switching element is being distributed in circuit parts having a staggered clock clocking rate, the a resonant frequency of the alternating voltage a resonant circuit being higher than the a clock frequency of a half-bridge.

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