| 摘要 |
PROBLEM TO BE SOLVED: To suppress incapability of acquiring an output from a DC power supply at a series connection, in a power system capable of switching the connection state of two DC power supplies.SOLUTION: A voltage converter 30 is disposed between a DC power supply 10 and an inverter 40. A DC power supply 20 is connected between a main positive bus MPL and a second node ND2. When a state amount indicative of a charge state of the DC power supply 10 falls below a threshold, if the voltage of the DC power supply 20 is higher than the voltage of the DC power supply 10, a switching element S1 and switches Sa and Sb are closed, and a switching element S2 is opened. |
