基于Marx和磁开关的方波脉冲电源的研制北大核心CSCD

设计了一种全固态高压重频方波脉冲发生器,主要由Marx发生器、脉冲形成线和磁开关构成。Marx发生器通过电感对脉冲形成线进行充电,将其充电至所需电压水平;当脉冲形成线充电至峰值电压时,磁开关饱和;脉冲形成线通过饱和的磁开关对匹配负载进行放电,在负载上形成一个高压方波脉冲。串入电感与磁开关相互匹配,不仅直接影响放电过程,同时也决定着磁开关需承受的伏秒数和负载上的预脉冲大小。介绍了Marx发生器和磁开关的设计,在单次和5kHz重复频率下分别进行实验。在50Ω的匹配电阻负载上,获得电压幅值为12.5kV、电流幅值为250A、上升时间为46ns、脉宽为220ns的方波脉冲。对放电过程进行了PSPICE仿真模拟,仿真结果与实验结果匹配良好。

Rectangular pulse generator based on Marx and magnetic switch

An all solid-state high-voltage rectangular pulse generator is proposed. This generator consists of a Marx generator, a pulse forming line (PFL) and a magnetic switch (MS). As a power supply, the Marx generator discharges to the PFL through an inductor. The inductor should cooperate with MS since it influences the discharging process directly and determines the volt-second product of the MS and the pre-pulse over the load. The MS saturates at exactly the moment the discharging process ends. PFL discharges to the matched resistor load through the saturated MS and a high voltage rectangular pulse is obtained over the load. The designs of the Marx generator and the MS are introduced in this paper. Experiments under a single shot and repetitive frequency of 5 kHz are carried out. PSpice simulations with a simplified model of MS are carried out to verify the experimental results. The experimental result matches well with the simulation results. A rectangular pulse with 12.5 kV voltage amplitude, 250 A current amplitude, 46-ns rise-time, 220 ns pulse-width is obtained over the 50 resistor load.