US 6,212,081 B1Granted

Uninterruptible duplexed power supply system

AssigneeNihon Protector Co., Ltd.

InventorSetsuo Sakai

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Abstract

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.

Claims4

Dependent claims

An uninterruptible duplexed power supply system, which is constituted by connecting to the primary winding of a high-frequency transformer a AC power circuit comprising a rectifying circuit, which rectifies the AC from a commercial AC power supply, and a first switching device provided on the output side of this rectifying circuit;

and connecting to a secondary winding of said high-frequency transformer a secondary DC outputting circuit, which supplies electric power to a load;
and connecting to a tertiary winding of said high-frequency transformer a DC power circuit, comprising a second switching device for either synchronizing with said AC power circuit, or for operating said DC power circuit in accordance with the operating status of the AC power circuit, this uninterruptible duplexed power supply system being constituted so that at least the AC power circuit is unitized, and the AC power circuit is detachable in a connected state, in which the AC power circuit is electrically connected to the primary winding of said high-frequency transformer, and in a connection release state, wherein this connected state is released;
and in constituted so as to provide means for either buffering or preventing an overcurrent reverse current resulting from induced voltage from said DC power circuit via said high-frequency transformer to said power circuit, and so that said power circuit unit is detachable in an energized state.

Dependencies are inferred from the claim text.