Patent ID: RE45069

Claim:
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 in that 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 ; and that 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.