多级谐振充电的Marx脉冲源研究

Marx Pulse Source with Multistage Resonant Charging

Marx发生器是一种经典的脉冲功率发生装置。为了更好地满足高电压、双极性高效率等实际使用需求,文中提出了多级谐振充电的Marx脉冲源,即利用串联谐振充电源与串心磁环变压器对Marx脉冲发生器分组充电。搭建两类对称结构多级谐振充电的Marx脉冲发生器并验证其性能,包括可变极性的单极性发生器和双极性脉冲发生器。电路由一组正极性的3路8级Marx和一组负极性的3路8级Marx组成,共48级。实验结果表明,可变极性的单极性Marx发生器可产生正极性或负极性电压幅值为30 kV的脉冲,双极性发生器可向空载和50 kΩ的阻性负载输出±10 kV的电压脉冲。通过FPGA(Field Program Gate Array)的信号控制可以将重复频率控制在1 Hz~1 kHz范围内调节,脉宽可在1~200μs范围内调节,脉冲前后沿为50 ns以内。正、负脉冲之间的弛豫时间为0.2~200.0μs。

Marx generator is a classic pulse power generator.In order to better meet the practical needs of high voltage,bipolar and high efficiency,a multi-stage resonant charging Marx pulse generator is proposed,which uses a series resonant charging power supply and a series core magnetic ring transformer to charge the Marx pulse generator in groups.The Marx pulse generator with multi-stage resonant charging of two symmetrical structures is built and its performance is verified,including the unipolar generator and the bipolar pulse generator with variable polarity.The circuit consists of a group of 3-way 8-stage Marx with positive polarity and a group of 3-way 8-stage Marx with negative polarity,totaling 48 stages.The experimental results show that the unipolar Marx generator with variable polarity can generate positive or negative voltage pulses of 30 kV,and the bipolar generator can output±10 kV voltage pulses to no-load and 50 kΩresistive load.Through the signal control of Field Program Gate Array(FPGA),the repetition frequency can be adjusted within the range of 1 Hz~1 kHz,the pulse width can be adjusted within the range of 1~2000x0E䥺SymbolmA@0x0Fs,and the front and back edges of the pulse are within 50 ns.The relaxation time between positive and negative pulses is 0.2~200.0μs.