| 引用本文: | 高景明,刘永贵,杨建华,等.基于金属膜电阻的大功率低电感负载.[J].国防科技大学学报,2009,31(1):43-46.[点击复制] |
| GAO Jingming,LIU Yonggui,YANG Jianhua,et al.High Power Low Inductance Dummy Load Made of Metal Film Resistors[J].Journal of National University of Defense Technology,2009,31(1):43-46[点击复制] |
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| 基于金属膜电阻的大功率低电感负载 |
| 高景明, 刘永贵, 杨建华, 周相, 龙霞锋 |
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(国防科技大学 光电科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 利用金属膜电阻设计并制作了用于陡化前沿Marx发生器调试的大功率低电感负载。其阻值约为90Ω，电感约为55nH，基本不具备分散电容。该负载采用线性渐变的圆锥外型结构，有利于减小信号在负载上的反射，配合电容分压器使用能够很好地完成对前沿约为几ns的快前沿高压脉冲的测量。理论估算了该负载的功率容量，并利用PSpice软件模拟了对其进行脉冲方波加载的情况。该负载用于调试陡化前沿的Marx发生器的实验中，获得了幅值约210kV，脉宽近40ns，前沿为5ns的快前沿高压脉冲。多次实验结果表明该负载性能稳定，适用于陡化前沿Marx发生器的调试工作。 |
| 关键词: 大功率低电感负载 陡化前沿Marx发生器 快前沿高压脉冲 测量 |
| DOI： |
| 投稿日期：2008-05-23 |
| 基金项目:国家高技术发展计划项目 |
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| High Power Low Inductance Dummy Load Made of Metal Film Resistors |
| GAO Jingming, LIU Yonggui, YANG Jianhua, ZHOU Xiang, LONG Xiafeng |
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(College of Opto-electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| This paper presents a high power low inductance dummy load made of metal film resistors, of which the resistance is 90Ω,and the inductance is ～55nH, nearly without stray capacitance. Cooperated with a capacitive divider, the dummy load has been utilized to measure high voltage pulse with a rise time of several ns for testing a 10-stage wave erection Marx generator. Experimental results verify the high performance of this load, compared with a water resistor load of the same resistance. This high performance is determined by two virtues in the design: one is for using non-capacitance of the metal film resistors and the other is for adopting a structure of impedance tapering line. Power tolerance of the load is evaluated theoretically. In addition, the response ability fed by a square voltage wave is simulated by PSpice software. The dummy load has been tested on the wave erection Marx generator, producing a high voltage pulse with an amplitude of ～210kV, a pulse width of ～40ns and a rise time of ～5ns, and long term operations show its high reliability and stability. |
| Keywords: dummy load of high power capability and low inductance wave erection marx generator fast rise time high voltage pulse measurement |
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