Patent ID: 8816615
Filing Date: 2014-08-26
Classification: B60L,Y02T

Abstract:
1. A drive device for a railway vehicle comprising: an inverter device for converting DC power obtained from a DC power source into AC power; at least one or more AC motors driven by the inverter device; a chargeable and dischargeable energy storage device; and a voltage adjustment device that adjusts the output voltage thereof by using a current control device disposed between the positive and negative electrodes of the energy storage device and configured to switch the connection to the positive electrode side or the negative electrode side of the energy storage device, and wherein the drive device is configured such that the output voltage of the voltage adjustment device is added to the voltage of the DC voltage source, and thereby the voltage applied to the inverter device is increased to increase the regeneration braking force, wherein the output voltage of the voltage adjustment device is adjusted at least during the period of power running operation or regeneration operation of the inverter device in such a manner that, when the power running operation or the regeneration operation of the inverter device is started, the 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 when the power running operation or the regeneration operation of the inverter device is stopped, 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.