高压RSD开关谐振触发的仿真  

Simulation of Resonant Trigger of Highvoltage RSD Switch

作　　者：周郁明[1] 余岳辉[1] 陈海刚[1] 

机构地区：[1]华中科技大学电子科学与技术系,武汉430074

出　　处：《高电压技术》2007年第6期33-36,共4页High Voltage Engineering

基　　金：国家自然科学基金(50277016;50577028);高等学校博士点基金(20050487044);国家973计划子专题(5132802)。~~

摘　　要：针对20kV高压反向开关晶体管RSD(Reverse Switching Dynistor)开关的触发问题,提出了一种谐振触发方式。利用电路仿真软件PSpice研究了谐振触发回路参数电容、电感、电阻对RSD预充电荷量的影响,并计算出相应条件下所使用磁开关的磁芯截面积。结果表明,谐振触发回路参数分别选择为0.3μF、8μH和1Ω时,能降低触发开关的要求,并能给RSD提供充分的预充电荷量。RSD（ Reverse Switching Dynistor）, a high power semiconductor switch, is turned on by a thin layer of an electron-hole plasma uniformly distributed over the wafer. RSD is thyristor-like device with pnpn structure. The only two electrodes make it easy to stack in series. Such advantages in structure and operating principle offer a possibility of RSD to switch high voltage and high current pulse. The key of RSD application is to design a reliable trigger circuit, and a magnetic switch is utilized to isolate the main circuit from trigger circuit. Aiming at the problem that 20kV RSD is difficult to trigger, a project is put forward by means of resonant trigger. A circuit simulator PSpice is employed to investigate the effect on pre-charge taken by the trigger circuit parameters including capacitor, inductor and resistor. At the same time, the cross-sectional area of magnetic switch core under each condition is calculated. Results show that it is effective when the trigger circuit parameters are chosen to 0.3/μF,8μH and 1Ω respectively. In this ease, the trigger switch may be a low-power semiconductor switch and the pre-charge for RSD is sufficient.

关 键 词：RSD 谐振触发 预充电荷 磁开关 PSPICE 仿真 

分 类 号：TM564[电气工程—电器]