| 摘要 |
Provided is a bidirectional contactless power supply device in an SS system in which resonance capacitors (53, 54) are connected in series with a primary coil (51) and a secondary coil (52). A first power convertor (61) and a second power convertor (62) are connected on the first coil side while a third power convertor (63) is connected on the secondary coil side. During G2V, the second power convertor (62) converts a commercial AC current to a DC current, the first power convertor (61) converts the DC current to a high-frequency AC current, and the third power convertor (63) converts the high-frequency AC current to a DC current, thereby charging an electricity storage device. At this time, when the first power convertor (61) is driven with a constant voltage, the electricity storage device is charged with a constant current. During V2G, the third power convertor (63) converts a DC current to a high-frequency AC current, the first power convertor (61) converts the high-frequency AC current to a DC current, and the second power convertor (62) converts the DC current to a commercial AC current. At this time, when the third power convertor (63) is driven with a constant current, the output of the first power convertor (61) becomes a constant voltage. |
