| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply system in which connection state of two DC power supplies can be switched by a simple configuration.SOLUTION: A voltage converter 30 is provided 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. A switch Sa is connected between the second node ND2 and a main negative bus MNL, and connects and disconnects the second node ND2 and the main negative bus MNL electrically. A switch Sb is interposed in series with the DC power supply 20 between the main positive bus MPL and the second node ND2, and suppresses I/O of the DC power supply 20 when the DC power supply 20 is not used. |
