| 摘要 |
<P>PROBLEM TO BE SOLVED: To inhibit a failure from being generated when power is recovered from momentary power failure. <P>SOLUTION: When an AC power supply 100 is restored in a state where stored charge of a smoothing capacitor 11 remains, an output voltage VDC of an AC/DC conversion part 1 is increased. At this time, since a signal output part 40 of a control part 4 turns off a switching element 30 by a stop signal given from a forced-off control part 6, an output voltage Vo of a DC/DC conversion part 2. Accordingly, the output voltage VDC of the AC/DC conversion part 1 continues to be increased without being clamped at a low voltage. As a result, a failure is inhibited from being generated when power is recovered from momentary power failure. <P>COPYRIGHT: (C)2013,JPO&INPIT |
