发明名称 |
Schutzanordnung für eine Schaltvorrichtung |
摘要 |
<p>A protection arrangement for a switching device having a possible open-circuit failure condition comprises a thyristor (307) connected in parallel with the main current-carrying terminals of the switching device (101) to be protected, the thyristor being connected such that a forward current direction of the thyristor is the same as a direction of a current which flows between the main current-carrying terminals during normal operation of the switching device, and being arranged to present an irreversible effective short-circuit when its normal parameter ratings are exceeded. The protection arrangement is particularly suitable for insulated-gate bipolar transistors (IGBT's) and preferably employs a pressure-packaged asymmetrical thyristor (ASCR) as the protection thyristor. The ASCR should be selected to withstand the normal (snubber-limited) dV/dt of the voltage across the switching device. <IMAGE></p> |
申请公布号 |
DE69634688(T2) |
申请公布日期 |
2005.11.17 |
申请号 |
DE1996634688T |
申请日期 |
1996.12.19 |
申请人 |
ALSTOM CONTROLS LTD., RUGBY |
发明人 |
CRANE, ALLAN DAVID |
分类号 |
H01L27/04;H01L29/78;H03K17/0814;H03K17/082;H03K17/10;(IPC1-7):H03K17/081 |
主分类号 |
H01L27/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|