基于金属膜电阻的大功率低电感负载  

High Power Low Inductance Dummy Load Made of Metal Film Resistors

作　　者：高景明[1] 刘永贵[1] 杨建华[1] 周相[1] 龙霞锋[1] 

机构地区：[1]国防科技大学光电科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2009年第1期43-46,共4页Journal of National University of Defense Technology

基　　金：国家高技术发展计划项目

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。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 stone 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 stabihty.

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 

分 类 号：TN927[电子电信—通信与信息系统]