大功率IGBT光纤驱动电路的故障保护与复位  

Fault Protection and Reset Method for Fiber Optic Isolated High-power IGBT Drivers

作　　者：李旭[1] 何礼高[1] 马彦林[1] 杜恩利[1] 

机构地区：[1]南京航空航天大学,自动化学院,江苏南京210016

出　　处：《电力电子技术》2010年第11期47-49,共3页Power Electronics

摘　　要：高压大功率场合IGBT的驱动要求较高,需注意的问题也较多。总结了高压大功率场合IGBT驱动的特点,重点研究了IGBT光纤驱动电路的故障保护与复位方法,分析了自动复位电路存在的不足并进行改进,通过封锁故障发生后一段时间内的复位信号,解决了持续故障状态下复位过于频繁、故障信号维持时间过短的问题。最后通过实验证实了改进的有效性。High-power IGBTs have high performance requirements and need to be strictly designed.This paper summarizes the characteristics of high-power IGBTs used in high-voltage occasions.Emphatically the fault protection and re- set method for the fiber optic isolated drivers are studied.The shortage of the conventional automatic reset circuit is analyzed and an improved method is proposed.With this method, some reset signals are blocked after the fault status, so the problems like too-frequent resets and too-short fault signal maintain time are eliminated.The experimental result proves the effectiveness of the improved method.

关 键 词：驱动电路 故障保护 复位方法 光纤驱动 

分 类 号：TM13[电气工程—电工理论与新技术]