| 摘要 |
PROBLEM TO BE SOLVED: To control a voltage and current ratio of a plurality of output circuits connectable to an electric load selectively in series connection or parallel connection, and set an arbitrary output balance of the plurality of output circuits.SOLUTION: A connection switching control section 21 provides, within a voltage change period where a series state YA in which a first power supply 11 and a second power supply 12 are connected in series with an inverter 3 and a parallel state YC in which the first power supply 11 and the second power supply 12 are connected in parallel with the inverter 3 can be repeatedly alternated to change a voltage applied to the inverter 3, a first period where a current of one of the first power supply 11 and the second power supply 12 changes on an increasing trend and a current of the other changes on a decreasing trend, and a second period where the one current changes on a decreasing trend and the other current changes on an increasing trend. |
