| 摘要 |
An electric motor vehicle main circuit system includes an AC-DC switching circuit 12 that switches a supply destination of electric power according to a type of supplied power from an overhead wire 2, a transformer 14 that steps down an input alternating-current voltage, a tap changer 15 that switches tap positions of the transformer 14, a CNV 17 that converts an output of the tap changer 15 into a direct-current voltage, an AC contactor 16 that opens and closes a power supply path between the tap changer 15 and the CNV 17, an FC 18 that accumulates an output of the CNV 17 or an output of the overhead wire 2, a CH 21 that steps up an output of the FC 18, an FC 22 that accumulates an output of the CH 21, an INV 24 that converts an output of the FC 22 into a desired alternating-current voltage, a DC contactor 19 connected between the AC-DC switching circuit 12 and direct-current buses 20a and 20b that connect the FC 18 and the CH 21, the DC contactor 19 opening and closing a power supply path between the AC-DC switching circuit 12 and the CH 21, and a control section 30 that controls the tap changer 15, the AC contactor 16, the DC contactor 19, the CNV 17, and the CH 21 on the basis of information concerning an overhead wire voltage and external command information. |
