Patent ID: 7746669

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 voltage of the battery in a discharge mode of operation and for charging the battery in a charge mode of operation, said power inverter including an HF transformer that forms a resonant circuit together with a resonant capacitor, characterized in that the transformer comprises two windings with a center tap on its primary side, said center tap being connected to a power electronic midpoint circuit with semiconductor switches, a winding to which the resonant capacitor is connected in series being provided on the secondary side, that a DC-AC converter circuit element is provided which lies on the 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 distributed in circuit parts having a staggered clock rate, the resonant frequency of the alternating voltage circuit being higher than the clock frequency of a half-bridge.