| 摘要 |
PROBLEM TO BE SOLVED: To provide a power source unit in which a reverse current does not flow in the case of parallel connection. SOLUTION: A power source unit 3 detects the direction of a current flowing in a main switch element 10, from a current detecting circuit 30 detecting a current flowing in the main switch element 10 and the output of the current detecting circuit 30. Whcn a backward current I10 flows during a period of electric continuity, the power source unit 3 prolongs the period of electric conduction of the main switch element 10. Since the amount of a current flowing in the main switch element 10 increases, the backward current vanishes, and the current load of each of the power source units 3 connected in parallel is made uniform. |
