Analysis of Electric Parameters of a PPS System and Their Influence on Muzzle Velocity in EMG

2008 14th Symposium on Electromagnetic Launch Technology Pub Date : 2008-06-10 DOI:10.1109/ELT.2008.112

Yongxia Han, Fuchang Lin, Ling Dai, Lin Zou, Lei Wang, Gang Liu, L. Bo

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引用次数: 2

Abstract

A 500 kJ compact pulsed power supply (PPS) system used for electromagnetic railgun (EMG) system has been developed to investigate the influence of electric parameters on muzzle velocity in the paper, from which the stability and reliability of the PPS system can be evaluated. The pulsed power supply system consists of ten modules, and each module is composed of a high energy density capacitor, a triggered vacuum switch, a pulse shaping inductor, a dump resistor and a crowbar. Influence of different parameters on the velocity was analyzed by ATP simulations in this paper. The parameters include capacitance, equivalent series resistance (ESR) of the capacitor, inductance, natural electric parameter and jitter time of the TVS. The ESR and natural electric parameters are critical influencing factors by comparing the simulation and experimental results. In the end, muzzle velocity deduced by the current, which is obtained from a new model of actual circuit, is about twenty percent lower than that in ideal condition. It is pointed out that the velocity error is mostly caused by ESR and natural electric parameter.

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PPS系统电参数及其对EMG初速的影响分析

为了研究电磁轨道炮系统中电参数对初速的影响，研制了一种500kj的紧凑型脉冲电源(PPS)系统，以此来评价该系统的稳定性和可靠性。脉冲电源系统由十个模块组成，每个模块由高能量密度电容器、触发真空开关、脉冲整形电感、倾卸电阻器和撬棍组成。通过ATP模拟分析了不同参数对速度的影响。这些参数包括电容、电容等效串联电阻(ESR)、电感、TVS的自然电参数和抖动时间。仿真结果与实验结果对比表明，ESR和自然电参数是关键的影响因素。最后，在实际电路的新模型中，用电流计算得到的初速比理想情况下的初速低20%左右。指出速度误差主要是由ESR和自然电参数引起的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2008 14th Symposium on Electromagnetic Launch Technology

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