DRIVING CONTROLLER FOR AC ELECTRIC VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a driving controller for AC electric vehicle capable of avoiding competition between a generated frequency of higher harmonies current generated in a power converter on a cable side and a signal frequency on a line side. SOLUTION: A single-phase secondary voltage formed by stepping-down voltage from an AC cable with a single-phase AC power converter is converted into DC voltage by a PWM control with a phase of a carrier wave displaced by a power converter on the cable side. The carrier wave in this case is a carrier wave of frequency selected by switching at a pulse mode switching part. A driving side power converter converts DC voltage converted by the cable side power converter into a three-phase AC voltage for the supply to an induction motor. It is thus possible to displace the frequency of the higher harmonies current generated by the switching of a main circuit device of the cable side power converter.