| 摘要 |
PROBLEM TO BE SOLVED: To provide a railway vehicle travelling in overhead cable voltage sections including AC and multiple DC configured to prevent the output of the vehicle from dropping at a lower voltage in a DC voltage section, lowering voltage for an auxiliary power supply device.SOLUTION: A vehicle drive device includes: a power collecting device P enabled to collect two DC with different voltages; an inverter 106 for controlling an AC motor 107; an inverter 105 for performing constant voltage-constant frequency control, by operating with a lower voltage than the inverter 106 controlling the AC motor 107; a booster-step down chopper 108 enabled to boost and step down voltage; and circuit switchover means S1-S6 enabled to selectively switching current paths. Further, when a high voltage is collected, the power that is stepped down by the booster-step down chopper 108 is supplied to the inverter 105 for performing the constant voltage-constant frequency control, whereas when a low voltage is collected, the power that is boosted by the booster-step down chopper 108 is supplied to the inverter 106 for driving the AC motor 107. |
