晶闸管反向并联二极管组件的关断特性研究  

Research on shutdown characteristics of thyristor reverse parallel diodes

作　　者：李涛[1] 张星汝 何孟兵[2] 刘俊[2] 冯冰洋 Li Tao;Zhang Xingru;He Mengbing;Liu Jun;Feng Bingyang(Institute of Applied Electronics,CAEP,Mianyang 621900,China;State Key Laboratory of Advanced Electromagnetic Engineering and New Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]中国工程物理研究院应用电子学研究所,四川绵阳621900 [2]华中科技大学强电磁工程与新技术国家重点实验室,武汉430074

出　　处：《强激光与粒子束》2021年第4期126-132,共7页High Power Laser and Particle Beams

摘　　要：晶闸管具有控制特性好,寿命长、体积小、噪声小等优点,是高功率脉冲电源的重要器件。但晶闸管在高电压、大电流、重频工作条件下使用时,会出现晶闸管无法在特定时间内关断的情况,导致脉冲电源出现故障。为提高晶闸管在重频下的工作能力,本文对脉冲功率晶闸管组件的关断过程进行研究。基于晶闸管的关断原理和实验分析,在相同di/dt下,增大电流峰值对晶闸管反向恢复特性影响较小,并得到了晶闸管的反向恢复时间、反向恢复电荷和di/dt的关系。根据实验数据拟合晶闸管反向恢复电流波形,修改了电流指数函数模型,可以更好地拟合反向恢复电流。Thyristor has the advantages of good control characteristics,long life time,small size,low noise,etc.,and it is an important device for high-power pulsed power supplies.However,when a thyristor is used under high voltage,high current,and repetitive frequency working conditions,the thyristor may not be turned off within a certain time,causing the pulse power supply to fail.To improve the working ability of the thyristor under repetitive frequency,this paper studies the turn-off process of the pulse power thyristor component.Based on the turn-off principle and experimental analysis of the thyristor,it is found that under the same conditions,increasing the current peak value has little effect on the reverse recovery characteristics of the thyristor,and the relationship is got between reverse recovery time,reverse recovery charge and di/dt of the thyristor.The reverse recovery current waveform of the thyristor is fitted according to the experimental data,and the current exponential function model is modified to better fit the reverse recovery current.

关 键 词：脉冲功率开关 晶闸管 反向恢复 动态均压 静态均压 

分 类 号：TM832[电气工程—高电压与绝缘技术]