基于EXB841的IGBT驱动电路设计及优化  

Design and optimization of EXB841-based IGBT driving circuitry

作　　者：丁祖军[1] 郑建勇[1] 梅军[1] 苏麟[1] 柴继涛 吴恒荣[2] 

机构地区：[1]东南大学电气系,江苏南京210096 [2]江苏华厦电气集团,江苏扬中212200

出　　处：《电力自动化设备》2004年第6期37-40,共4页Electric Power Automation Equipment

基　　金：江苏省科技攻关项目(BE2003043)

摘　　要：介绍了绝缘栅双极型晶体管IGBT(InsulatedGateBipolarTransistor)器件驱动电路设计的一般要求,对EXB841芯片的工作过程作了深入的分析,研究了EXB841对IGBT的开通和关断以及过流保护的原理,指出了用EXB841直接驱动IGBT时存在的问题和不足,主要是过流保护的阀值太高、关断不可靠及在软关断时没有对外部输入信号进行封锁。同时,提出了针对这些不足在设计驱动电路时应当采取的几种有效方法。最后,运用EXB841及其他器件设计和优化了一个IGBT的驱动电路,该驱动电路通过电力电子仿真软件PSPICE(SimulationProgramwithICEmphasis)仿真和试验证明能够有效地对IGBT器件进行驱动和过电流保护。The general demands of IGBT ( Insulated Gate Bipolar Transistor ) driving circuitry are introduced and the working process of EXB841driving circuitry is analyzed in detail.With the deep research on the principle of EXB841 ’ s direct driving and protecting IGBT ,some problems are pointed out ,which are the over - current protection setting is too high ,the switch - off process is unreliable and the external signals are not locked out during soft switch - off.Some effective coun - termeasures are put forward.An EXB841 - based IGBT driving circuitry is designed and optimized ,which is verified by PSPICE ( Simulation Program with IC Emphasis ) simulation and experiments.This project is supported by Scientific and Technological Brainstorm Project of Jiangsu Province ( BE2003043 ) .

关 键 词：绝缘栅双极型晶体管 EXB841 驱动电路 

分 类 号：TN47[电子电信—微电子学与固体电子学] TP391.9[自动化与计算机技术—计算机应用技术]