摘要
阐述了软降栅压和软关断的过电流保护原理,列出具体的保护时序参数。设计了过电流保护驱动电路,讨论了栅射集电阻对降栅压过程的影响,并提出一种可变栅射集电阻电路。在此基础上,得到了效果良好的试验结果。
Slowly-drop gate voltage and softly turn-off principles are explained in this article, specific parameters are also listed.A particular over-current protection and drive circuit is given ,the impact of resistance between gate and emitter on gate voltage dropping is discussed ,and an adjustable gate-emitter resistance circuit is put forward.On these bases,we obtain a good experimental result.
出处
《电焊机》
2007年第7期61-63,共3页
Electric Welding Machine
关键词
IGBT
过电流保护
软降栅压及软关断
栅射极电阻
IGBT
over-current protection
slowly-drop gate voltage and softly turn-off
resistance between gate and emitter
