重复频率低阻抗紧凑Marx脉冲功率源

伍友成; 杨宇; 何泱; 戴文峰; 郝世荣; 谢卫平; 冯传均; 曹龙博

doi:10.11884/HPLPB201830.170453

重复频率低阻抗紧凑Marx脉冲功率源

doi: 10.11884/HPLPB201830.170453

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

基金项目: 国家高技术发展计划项目

详细信息

作者简介:
伍友成(1979—)，男，副研究员，主要从事脉冲功率源技术研究; wuyoch@sina.com

通讯作者:
何泱(1986—)，男，博士，主要从事大功率重频电源等技术研究; heyang@caep.cn

中图分类号: TM833
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出版历程
- 收稿日期: 2017-11-10
- 修回日期: 2018-03-30
- 刊出日期: 2018-07-15

Compact repetitive Marx generator with low impedance

Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, P. O. Box 919-108, Mianyang 621900, China

摘要

摘要: 为了实现重频脉冲功率源小型化，研制了基于快Marx发生器的紧凑型重频低阻抗脉冲功率源。采用大功率重频高压电源对Marx发生器充电，通过对充电电源和脉冲触发源的同步控制，实现对Marx发生器重频充电；Marx发生器中采用薄膜脉冲电容器、小型化气体开关、电感隔离以及SF₆气体绝缘等设计，以8级紧凑Marx发生器进行验证性研究，在16 Ω阻抗负载上实现了重复频率10 Hz、脉宽150 ns、峰值电压大于400 kV连续多脉冲输出；在此基础上，设计了18级紧凑型Marx发生器，在约18 Ω阻抗负载上输出功率达到33 GW，峰值功率密度大于150 GW/m³，实现重复频率5 Hz、脉宽约160 ns、峰值电压大于600 kV的连续多脉冲输出。为了降低Marx发生器的输出阻抗，采用4台电容器并联作为Marx发生器的一级储能模块，研制了同轴紧凑Marx脉冲功率源，有效减小放电回路电感，实现12 Ω低阻抗负载近似匹配输出，前沿减小至50 ns以下，脉宽约130 ns。
- 紧凑型 /
- 重复频率 /
- 低阻抗 /
- 高功率 /
- Marx发生器
Abstract: A series of compact repetitive pulsed power systems on the basis of fast Marx generator were developed in Institute of Fluid Physics, China Academy of Engineering Physics. They are mainly composed of a fast Marx generator and a repetitive high voltage charging device. There are polypropylene film capacitors with plastic shell, miniaturized gas switches, isolated inductors and SF₆ gas insulation in these fast Marx generators. An 8-stage Marx generator was designed and tested. It can output repetitively 5 pulses with peak power of beyond 10 GW, rising-time of 50 ns, pulse width of 150 ns at frequency of 10 Hz. An 18-stage Marx generator has the same structure as the 8-stage Marx generator. It can generate a single pulse with peak power of more than 33 GW and pulse duration of about 160 ns on a resistor load of 18 Ω. Its peak power density is up to 150 GW/m³. But its output pulse has an obvious reverse pulse in the falling time, which is not helpful to drive a diode load. So, a 16-stage coaxial Marx generator was designed, there are four capacitors in parallel in one stage. The coaxial Marx generator has a low inductance and a low output impedance. It can generate a pulse with peak power of 28 GW and pulse duration of 130 ns without reverse pulse on an 12 Ω load. This work is useful for the development of high power compact pulsed power. There are also some work to do in order to enhance the working life and repetitive operation stability of high power compact Marx generator.
- compact /
- repetitive /
- low impedance /
- high power /
- Marx generator

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图 1 8级紧凑Marx发生器的结构布局和设计电路

Figure 1. Configuration and circuit design of 8-stage compact Marx generator

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图 2 触发开关与自击穿开关结构示意及电场仿真

Figure 2. Configurations and electric field simulation of trigger switch and self-breakdown switch

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Figure 3. Breakdown voltage of two-electrode switch

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图 4 触发开关10 Hz重频实验电压

Figure 4. Voltages of trigger switch at 10 Hz repetitive rate

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图 5 单次实验电压波形与仿真波形

Figure 5. Single pulse experimental and simulating waves

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图 6 重频10 Hz实验输出波形

Figure 6. Multi pulse experimental output pulses at 10 Hz

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图 7 18级Marx发生器等效电路

Figure 7. Equivalent circuit of 18-stage Marx generator

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图 8 Marx发生器负载电压仿真波形

Figure 8. Simulation result of Marx generator

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图 9 18级紧凑Marx发生器总体结构

Figure 9. Side-view and 3-D configuration of the arrange in 18-stage Marx generator

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图 10 18级Marx单次实验波形

Figure 10. Single-pulse output in 18-stage Marx experiment

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图 11 18级Marx重频多脉冲实验波形

Figure 11. Multi-pulse output in 18-stage Marx experiment

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图 12 同轴紧凑Marx发生器结构示意

Figure 12. Configuration of a compact coaxial Marx generator

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图 13 同轴紧凑Marx发生器实验波形

Figure 13. Experimental output single pulse of the compact coaxial Marx generator

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