基于PFN-Marx技术的紧凑型重频脉冲功率源  

A compact PFN-Marx repetitive pulsed power source

作　　者：伍友成[1] 冯传均 付佳斌[1] 戴文峰[1] 曹龙博 Wu Youcheng;Feng Chuanjun;Fu Jiabin;Dai Wenfeng;Cao Longbo(Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院流体物理研究所,脉冲功率科学与技术重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2024年第5期124-129,共6页High Power Laser and Particle Beams

基　　金：国家高技术发展计划项目。

摘　　要：针对低磁场相对论磁控管高功率微波器件实验驱动需求,对基于脉冲形成网络(PFN)储能的高功率脉冲产生技术进行了研究。为了使其结构紧凑且具有较好的输出脉冲波形,设计了半环形PFN脉冲形成单元,两个半环形带状PFN与一体化开关、绝缘盘组成圆环形高压脉冲产生模块。PFN脉冲形成单元由13个陶瓷电容与半环形金属电极板构成,多个高压脉冲产生模块同轴层叠,所有开关导通后各模块PFN串联放电,产生快前沿高功率方波脉冲,再通过对触发开关和充电电源的同步控制实现重频工作。采用电磁仿真软件对PFN物理结构进行优化设计,研制的高压脉冲产生模块充电51 kV在负载8.5Ω上输出电压峰值49.6 kV、脉冲半高宽108 ns、脉冲前沿14 ns、平顶(90%~90%) 74 ns,具有较好的方波特性;11个高压脉冲产生模块层叠集成为1个22级紧凑PFN-Marx装置,在充电51 kV的条件下,84Ω负载上获得峰值516 kV的高电压脉冲输出,半高宽104 ns、平顶63 ns、脉冲前沿11 ns,实现了20 Hz连续15 s重频稳定工作,输出波形完全一致。A compact repetitive pulse power source is developed as an experimental platform for high power relativistic magnetron with low magnetic field.To obtain better output pulse waveform with a compact structure,the pulsed power source designed based on PFN-Marx technology has a coaxial structure.A circular pulse forming net(PFN)is devised out with the impedance of 4Ω,working voltage of 50 kV,and electrical length of 53 ns,consisting of 13 ceramic capacitors with the capacitance of 1nF.Two PFN devices in series by a gas switch and an insulation plate form a circular high-voltage pulse generation module.Multiple pulse generation modules are coaxial and stacked in a metal cylinder.Inductive isolation is used between the modules.After all switches are turned on,all modules are discharged in series to generate a fast rising-time high-power square wave pulse.Moreover,repetitive operation is achieved through synchronous control of the trigger switch and charging power supply.In experiments the 22-stage PFN-Marx pulsed power source developed was charged to 51 kV,and a high-voltage square wave pulse of 516 kV was obtained on a load of 84Ω,with pulse width(FWHM)of 104 ns,flat top of 63 ns and rising-time of 11 ns.This power source can operate stably at a repetition rate of 20 Hz for 15 s.

关 键 词：脉冲形成网络 MARX发生器 脉冲功率 重复频率 紧凑 

分 类 号：TM833[电气工程—高电压与绝缘技术]