Patent Number: 8,816,615

Title: Drive device for railway vehicle

Abstract: In a drive device for a railway vehicle, in which regeneration braking force is increased by adding the output voltage of a voltage adjustment device to a DC power source voltage, operation of the current control device is started prior to the start of the power running operation or the regeneration operation of the inverter device, and the operation of the current control device is stopped later than the stopping of the power running operation or the regeneration operation of the inverter device. Thereby, the current control device is surely operated at least during the operation period of the inverter device, so that the output voltage of the voltage adjustment device is adjusted by the current control device, to thereby prevent the over-discharge of the energy storage device at the time of power running operation or the overcharge of the energy storage device at the time of regeneration operation.

Inventors: Araki; Daijiro (Mito, JP), Shimada; Motomi (Mito, JP), Miyaji; Yoshihiro (Hitachinaka, JP), Suzuki; Keita (Hitachinaka, JP), Suzuki; Keishi (Tokyo, JP)

Assignee: Hitachi, Ltd.

International Classification: H02P 3/14 (20060101)

Expiration Date: 8/26/12018