Patent ID: 9656555
Date: 2017-05-23
CPC Classifications: B60L,B60W,Y02T

Claim:
1. An electric motor vehicle main circuit system configured to be capable of being housed in a vehicle control device that forms a part of an electric motor vehicle driving system, an AC-DC switching circuit that switches a supply destination of electric power according to a type of supplied power from an overhead wire and a transformer that includes two tap positions on a secondary winding wire side, steps down an input alternating-current voltage, and outputs a desired alternating-current voltage from the two tap positions being provided in the electric motor vehicle driving system, and alternating-current by a first alternating-current power supply, alternating-current power by a second alternating-current power supply having an higher output voltage than the first alternating-current power supply, direct-current power by a first direct-current power supply, and direct-current power by a second direct-current power supply having a higher output voltage than the first direct-current power supply being assumed as the type of the supplied power, the electric motor vehicle main circuit system comprising: a tap changer that switches the tap positions of the transformer; a converter that converts an alternating-current voltage output by the tap changer into a desired direct-current voltage; an alternating-current contactor that opens and closes a power supply path between the tap changer and the converter; a first filter capacitor that accumulates direct-current power output by the converter or direct-current power supplied from the overhead wire; a chopper circuit that steps up a direct-current voltage output by the first filter capacitor to a desired direct-current voltage; a second filter capacitor that accumulates direct-current power output by the chopper circuit; an inverter that converts a direct-current voltage output by the second filter capacitor into a desired alternating-current voltage; a direct-current contactor that opens and closes supply of direct-current power from the AC-DC switching circuit; and a control section that controls the tap changer, the alternating-current contactor, the direct-current contactor, the converter, and the chopper circuit on the basis of information concerning a voltage of the overhead wire and command information from an outside, the tap changer, the converter, the alternating-current contactor, the first filter capacitor, the chopper circuit, the second filter capacitor, the inverter, the direct-current contactor, and the control section being configured to be capable of being housed in the vehicle control device, wherein when the first direct-current power supply is not used among the first and second alternating-current power supplies and the first and second direct-current power supplies, the electric motor vehicle main circuit system is configured by removing the chopper circuit.