| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply system for L-load which suppresses abnormal voltage at open-circuit for reduction in circuit stress and is capable of performing stable and perfect circuit opening operation. SOLUTION: When an L-load 1 is separated from a power supply 2, a first short-circuit circuit 5A is formed to attenuate energy accumulated in the L-load 1, and further a second short-circuit 5B is formed to attenuate energy accumulated in the power supply 2 and a direct-current reactor 3. After the formation of the first short-circuit 5A and the second short-circuit 5B, the L-load 1 is separated from the power supply 2 by means of a circuit opening switch 7.
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