Patent ID: 9013125
Filing Date: 2015-04-21
Classification: B60L,Y02T

Abstract:
1. An electric power converter of an electric rolling stock comprising: a first electric-power converting unit that receives a direct-current voltage and outputs a direct-current voltage controlled to a predetermined value; and a second electric-power converting unit that is connected to an output side of the first electric-power converting unit, and converts a direct-current power from the first electric-power converting unit into an alternating-current power and drives an electric motor, wherein the first electric-power converting unit includes a first control unit that, based on a voltage detected on an input side of the first electric-power converting unit, generates a control command that is a command for an output voltage of the first electric-power converting unit, the first control unit is configured to control the control command so as to increase an output voltage of the first electric-power converting unit in response to an increase of the voltage detected on the input side of the first electric-power converting unit, and the second electric-power converting unit includes a second control unit that performs regenerative torque decreasing control for decreasing a torque of the electric motor in response to a voltage detected on the output side of the first electric-power converting unit increasing above a predetermined value.