| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control power supply circuit of an uninterruptive power supply device, which generates control power even if there is no AC input nor AC output, is high in reliability by using a versatile component to the utmost, and is constituted at a low cost. <P>SOLUTION: In the control power supply circuit of the uninterruptive power supply device, the control power is generated from an AC input side to which an alternate current is inputted from a commercial system power supply 1 in a normal operation, and also the control power is generated from an AC output side to which an accumulator 5 is connected in the interruption of the commercial system power supply. The control power is generated by making two kinds of power abutting on each other one of which is DC power rectified from an AC input inputted from the commercial system power supply via a rectifier 7, and the other of which is DC power obtained by stepping down a DC voltage from a DC part to which the accumulator is connected via a DC step-down circuit 9. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
