高压大功率晶闸管反向恢复特性动态模型  

Dynamic Modelling of the Turn off Performance of High Voltage Power Thyristor

作　　者：张静 汤广福 温家良 查鲲鹏 

机构地区：[1]国网智能电网研究院,北京102200

出　　处：《电力电子技术》2015年第4期50-53,共4页Power Electronics

基　　金：国家电网公司科技项目(SGRI-PG-71-12-002);国家863高技术研究发展计划(2012AA052701)~~

摘　　要：晶闸管反向恢复过程模型的精确性,对以晶闸管为开关器件的电力电子设备的电气性能研究和设计具有重要影响。在分析晶闸管阻断恢复过程中载流子运动特性和PN结变化规律的基础上,结合晶闸管实际工作电路,提出了用描述动植物自然生长过程的Logistic曲线来建立晶闸管反向恢复过程的非线性电阻模型,弥补了传统的晶闸管反向恢复电流指数模型和双曲正割模型的不足。仿真与实验结果的对比证明了所提模型的正确性和精确性。Correct modelling of the turn off characteristics of a high voltage power thyristor plays an important role in the analysis and design of power electronic circuits where power thyristors are used.By analyzing the change charac- teristics of charge carriers and PN-junetions at thyristor turn-off,a non-linear resistance model is proposed to repre- sent the dynamic characteristic of high voltage power thyristor at turn-off and when used in a given external circuit. The non-linear resistance model is identical to the logistic curve which is typically used to reflect the natural growth process of animals and plants.The non-linear resistance model is then verified by comparing the simulated results to an actual thyristor reverse recovery currents obtained.

关 键 词：晶闸管 指数模型 双曲正割模型 

分 类 号：TN34[电子电信—物理电子学]