| 摘要 |
PROBLEM TO BE SOLVED: To enable evacuation running of a vehicle at the occurrence of an overvoltage in a power supply.SOLUTION: When an overvoltage determination unit 38 determines that a primary voltage VL becomes higher than or equal to a predetermined threshold Vth, the states of all switching elements in a converter 30 and the states of all switching elements in inverters 40, 60 are maintained in an OFF state. When the overvoltage determination unit 38 determines that the state of the primary voltage VL higher than or equal to the threshold Vth continues for a predetermined time tprd or longer, the converter 30 is made to perform step-up operation, and each state of the switching elements of the plurality of legs of the inverters 40, 60 is changed repeatedly between an ON state and the OFF state, to thereby convert a secondary side voltage VH into an AC voltage, so as to apply to generator motors 81, 82.SELECTED DRAWING: Figure 1 |
