Patent ID: 8154240
Filing Date: 2012-04-10
Classification: B60L,H02P,Y02T

Abstract:
1. A control apparatus for an electric railcar, comprising: an inverter that exchanges power between the inverter and an alternating-current rotating machine; a filter capacitor connected in parallel to a direct-current side of the inverter; a filter reactor provided between the filter capacitor and an overhead line; an overhead line voltage measuring instrument that measures an overhead line voltage; a voltage increase detection unit to which the overhead line voltage measured using the overhead line voltage measuring instrument is supplied, the voltage increase detection unit sensing an amount of voltage increase occurring when the overhead line voltage goes beyond a reference voltage value and rises as varying at a rate equal to or higher than that by a predetermined time constant that is shorter than a time constant of the filter reactor and the filter capacitor; a correction torque command value calculation unit that calculates a correction torque command value that is corrected so that a torque command value to be received from an external unit is made smaller for a predetermined time elapsing after the voltage increase detection unit has sensed an amount of voltage increase of a predetermined range or more during regeneration operation of the inverter; and a vector control unit that controls the inverter so that the alternating current rotating machine develops torque coincident with the correction torque command value.