发明名称 |
A METHOD AND A DEVICE FOR DETECTING AND HANDLING SHORT-CIRCUIT PHENOMENA FOR POWER SEMICONDUCTOR DEVICES OF TURN-OFF TYPE CONNECTED IN SERIES |
摘要 |
A method and apparatus for detecting and handling a short circuit in a circuit having a plurality of power semiconductors connected in series. The method comprising the steps of dividing the voltage across the electrodes of each power semiconductor and measuring the magnitude of a small proportion of the voltage. The magnitude of the voltage is compared to a reference voltage at least from when the power semiconductor is turned on. The reference voltage is higher than the maximum voltage across the power semiconductor during normal operation. A short circuit is detected when the magnitude of the measured voltage exceeds the reference voltage.
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申请公布号 |
CA2219368(C) |
申请公布日期 |
2001.04.17 |
申请号 |
CA19972219368 |
申请日期 |
1997.11.13 |
申请人 |
ASEA BROWN BOVERI AB |
发明人 |
LUNDBERG, PETER;BIJLENGA, BO |
分类号 |
G01R31/02;H02H3/08;H02H7/12;H02M1/00;H02M1/08;H02M1/088;H03K17/082;H03K17/10;(IPC1-7):G01R31/02;H02H3/00;H02H3/02 |
主分类号 |
G01R31/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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