| 摘要 |
PROBLEM TO BE SOLVED: To provide a charging/discharging system capable of preventing excessive ripple current from flowing into a capacitive element during charge of a power storage device, and preventing excessive surge voltage from applying to a switching element during discharge of the power storage device.SOLUTION: A charging/discharging system 1 performs a DC-AC conversion by a power conversion part 30 and an AC-DC conversion by a power conversion part 50 via a transformer 40, and supplies power to a power storage device 2 via a capacitive element 55 during a charge. While during a discharge, the system performs a DC-AC conversion by the power conversion part 50 and an AC-DC conversion by the power conversion part 30, and extracts power from the power storage device 2. The charging/discharging system 1 further has a charge auxiliary inductor element 70 and a discharge auxiliary part 80 between the power conversion part 50 and the capacitive element 55. An auxiliary switching element 81 of the discharge auxiliary part 80 is turned-on during discharge, at least in the period when all full-bridge type switching elements in the power conversion part 50 are turned-off. |
