基于金属膜电阻的大功率低电感负载
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High Power Low Inductance Dummy Load Made of MetalFilm Resistors
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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。

    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.

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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.
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.

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  • 收稿日期:2008-05-23
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  • 在线发布日期: 2012-11-08
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