| 摘要 |
The present invention provides an uninterruptible duplexed power supply system, which is capable of achieving high efficiency and compact size, and moreover, is capable of solving for a power circuit failure in an energized state. This uninterruptible duplexed power supply system connects via a high-frequency transformer 7 a power circuit A, which rectifies AC from a commercial AC power supply 1, and which includes a switching device 6 for outputting; a secondary DC outputting circuit B, which supplies electric power to a load; and a DC power circuit C, including a switching device 20 for synchronizing with switching device 6 of power circuit A, and for operating this DC power circuit C, and is constituted so that the power circuit A is unitized, and this power circuit unit is detachable in a connected state, wherein same is connected electrically to the high-frequency transformer 7, and in a connection release state, and is constituted so as to provide device for buffering or preventing overcurrent reverse current resulting from induced voltage from the DC power circuit C via the high-frequency transformer 7 to the power circuit A, and so that the power circuit unit is detachable in an energized state.
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