MAIN CONVERSION DEVICE FOR ELECTRIC VEHICLE

Abstract

The first power converter is connected with a circuit connected with an overhead line, and an intermediate link, and mutually converts power. The second power converter is connected with the intermediate link, and a circuit electrically connected with an induction motor, and mutually converts power. The auxiliary power-supply device receives power from the intermediate link, and supplies power to a load. The operation controller controls the operation/deactivation of the first power converter based on acceleration and speed of a vehicle, auxiliary source power, and a restriction value for regenerative power to the overhead line in such a way that the power to be supplied to the auxiliary power-supply device becomes equal to or larger than the auxiliary source power, and the regenerative power flowing to the overhead line becomes equal to or smaller than the restriction value.