高电压大电流晶闸管组件的热特性  

Thermal characteristics of high voltage and high current thyristor assembly

作　　者：张星汝 冯冰洋 刘俊[1] 李元晟 肖豪龙 张梦瑜 何孟兵[1] Zhang Xingru;Feng Bingyang;Liu Jun;Li Yuansheng;Xiao Haolong;Zhang Mengyu;He Mengbing(State Key Laboratory of Advanced Electromagnetic Engineering and New Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室

出　　处：《强激光与粒子束》2020年第2期88-92,共5页High Power Laser and Particle Beams

摘　　要：晶闸管具有控制特性好、寿命长、噪声小等优点,目前在脉冲功率技术应用中,利用大功率晶闸管代替传统气体开关是研究趋势。晶闸管在高电压、大电流、重复频率工作条件下使用,需要对开关组件进行仔细的选型和组合。基于晶闸管的失效机理,对晶闸管组件在高电压、大电流、高di/dt,高du/dt、重复频率工作下的发热问题进行了理论分析、仿真计算和试验研究,对晶闸管组件在重复频率脉冲功率系统中的使用条件给出了理论依据。随着晶闸管工作电压、电流、频率增大,晶闸管的热损耗也越大,晶闸管的发热也越严重。为保证晶闸管安全稳定地工作,需要结温保持在安全范围内,不能长时间在重复频率下工作。Thyristors have the advantages of good control characteristics,long life and low noise.At present,in the application of pulse power technology,the use of high-power thyristors instead of traditional gas switches is a research trend.Thyristors are used under high voltage,high current,and repetitive operating conditions,requiring careful selection and combination of switch components.Based on the failure mechanism of thyristors,the theoretical analysis,simulation calculation and experimental research on the heating of thyristor components under high voltage,high current,high di/dt,high du/dt and repetitive frequency are carried out.The use conditions of the thyristor components in repetitive frequency pulse power system thus have a theoretical basis.As the operating voltage,current,and frequency of the thyristor increase,the thermal loss of the thyristor increases and the heating of the thyristor becomes more serious.To ensure the safe and stable operation of the thyristor,the junction temperature needs to be kept within a safe range,and it cannot work at repetitive frequencies for a long time.

关 键 词：高功率脉冲电源 脉冲功率开关 晶闸管 热特性 热阻抗 

分 类 号：TM832[电气工程—高电压与绝缘技术]