STEP-UP/STEP-DOWN CONVERTER AS PHASE CONVERTER FOR ELECTRIC MACHINE
The present invention provides a bidirectional voltage converter. The voltage converter comprises at least four modes of operation for converting a DC voltage into a voltage for actuating an electric machine or for converting a generator voltage into a DC voltage. In this case, the respective converted voltage is smoothed and is provided so as to have a much lower noise component than in the case of conventional power controllers. The circuit design particularly allows operation at high switching frequencies. Hence, the switching frequency can be moved to a range outside the range of human hearing. Furthermore, high switching frequencies also allow a reduction in weight and required installation space for the voltage converter.