Design and experiment of portable Blumlein line
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摘要: 采用聚酯薄膜为绝缘材料，设计了一种小型化便携式层绕Blumlein线，其主要特点是采用S型层绕的方法对薄膜介质平板Blumlein线进行绕制，使形成线的体积小，结构紧凑，有利于脉冲功率源小型化、实用化的发展。其集成了薄膜电容器易卷绕、耐高压、储能强的优势，同时具备了传输线的特点。采用气体火花间隙开关，对S型薄膜介质脉冲形成线的耐压特性及负载输出波形进行了实验研究。结果表明：开关的导通特性对脉冲形成线的负载输出波形有很大的影响，开关电感及开关抖动等因素会影响脉冲波形的前后沿，使输出脉冲方波波形质量变差。采用PSpice软件对实验等效电路进行了模拟，得到了与实验一致的结果。设计的Blumlein线体积为50 cm18 cm12 cm，承载电压50 kV，负载输出脉冲上升沿50 ns，平顶宽度120 ns。
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关键词:
- 平板Blumlein线 /
- 聚酯薄膜 /
- 模块化 /
- 小型化
Abstract: A layer-wound mylar dielectric parallel-plates Blumlein line has been developed, which adopts S-type layer winding and is 50 cm18 cm12 cm in size. Its characteristics of high voltage insulation and output pulse were studied. The results simulated using equivalent circuit by PSpice software, consist with the results of experiment. It is found that the increase in switch inductance reduces the rise time of output pulses and distorts the output pulse shape, introducing reflections as well. The parasitic impedance causes some power loss in the line as the output pulse amplitude is lower than expected. The Blumlein line can deliver a maximum output of 50 kV to a matched load with duration of 180 ns and rise time better than 50 ns.-
Key words:
- parallel-plates blumlein line /
- mylar /
- modular structure /
- miniaturization
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