磁脉冲压缩系统的仿真研究

Simulation on a magnetic pulse compression system

分析了传统磁脉冲压缩系统的原理及缺点,对基于省去磁芯复位电路的磁脉冲压缩系统进行了介绍,为了更加深入地分析这种磁脉冲压缩系统,应用Pspice仿真分析软件建立了省去磁芯复位电路的磁脉冲压缩系统模型,计算出各级压缩过程中各元件的电压波形,及饱和变压器和磁开关的磁芯感应强度变化曲线;经测试,当负载为500Ω纯阻性负载时,系统两端输出的负极性脉冲峰值约-27 kV,半高宽约为70 ns,下降沿约为40 ns。通过分析仿真结果与实验结果,仿真中需考虑测量探头引入的并联电容对电路的影响。

Principle of operation of the traditional magnetic pulse compression（MPC） system is described. A magnetic pulse compression system is presented which does not contain external remagnetization circuits that are commonly used in magnetic compressors. To understand the magnetic switch operation in detail and to model the performance of magnetic switch, a Pspice model of the MPC system is designed. Circuit analysis of compressor and charging system accounting for nonlinear processes in magnetic switches is presented. Typical timing diagrams of pulse compressor working on a 500 W resistive load illustrated that in order to realize the desired pulse, 6 ms and 500 ns magnetization period would be required for PT1 and MS1, respectively. Two compression stages suffice to form -27 kV, about 70 ns FWHM pulse through a 500 Ω resistive load, the fall time is about 40 ns. The experimental results are in good agreement with the circuit simulation.