| 摘要 |
<P>PROBLEM TO BE SOLVED: To get a power converter which surely detects short circuit trouble having occurred in some elements in case that the constant voltage elements of a protective circuit against overvoltage are constituted of a plurality of series connection bodies. <P>SOLUTION: An EXOR circuit 50 outputs a signal as long as the tuning delay time of a timing tuning circuit 36 by inputting the signal from an OR circuit 21 and the signal from a delay circuit 20. A time difference judging circuit 51 operates a fault indicator 52 for judging that short circuit fault has occurred in some elements within the constant voltage elements ZD when the above tuning delay time length gets over the specified set time. <P>COPYRIGHT: (C)2004,JPO |
