| 摘要 |
PROBLEM TO BE SOLVED: To enable, in a power supply system which includes a power converter connected between a plurality of DC power supply and a common power line, securing protection capability from the overcharge of a smoothing capacitor, which is provided corresponding to the one DC power supply, as well as securing load power, when either one DC power supply is electrically shut off from the power supply system.SOLUTION: A power converter 50, including switching elements S1-S4, is connected between DC power supplies 10a, 10b and a power line 20. When a system main relay corresponding to one DC power supply out of the DC power supplies 10a, 10b is set to be an open state, a control device 40, by the on/off control of the switching element S1-S4, maintains a short-circuit state between the terminals of the smoothing capacitor corresponding to the one DC power supply, and also executes DC/DC conversion between another DC power supply and the power line 20. |
