100 kV重频气体开关初步研究及应用

伍友成; 耿力东; 何泱; 戴文峰; 曹龙博; 冯传均; 王敏华; 付佳斌; 杨宇; 张南川; 郝世荣

doi:doi:10.11884/hplpb201628.025005

强激光与粒子束, 2016, 28 (2): 025005, 网络出版: 2016-03-24

100 kV重频气体开关初步研究及应用

Investigation and application of 100 kV repetitive gas switches

论文大纲

伍友成 ^*耿力东何泱戴文峰曹龙博冯传均王敏华付佳斌杨宇张南川郝世荣

作者单位

中国工程物理研究院流体物理研究所, 脉冲功率科学与技术重点实验室, 四川绵阳 621900

气体开关重复频率 Marx发生器多脉冲 gas switch repetitive pulse Marx generator multi-pulse

摘要

为了减小脉冲功率源装置的体积,对三电极气体开关和两电极气体开关的结构进行了小型化设计。采用电磁场仿真软件对局部结构进行优化,对初步设计的触发开关和自击穿开关在不同SF6气压(0～0.2 MPa)、不同开关间隙条件下的击穿电压及触发工作电压等进行了实验研究。结果表明:设计的触发开关和自击穿开关在0～0.2 MPa气压范围内,自击穿电压随气压具有很好的线性关系;自击穿开关间隙为8 mm,改变气压(0.1～0.2 MPa)可实现自击穿电压90～125 kV可调;触发开关主间隙为7 mm,改变气压(0.1～0.2 MPa)可实现触发工作电压40～95 kV 可调;初步估算,触发开关和自击穿开关的工作电感均约20 nH。利用重频脉冲电源,测试了开关的重频工作能力,在工作电压80 kV、导通电流约20 kA的条件下,重复工作频率在20 Hz以上。此外,利用研制的开关构建了八级紧凑型Marx发生器,实现了5和10 Hz重频多脉冲输出。

Abstract

The tri-electrode gas switch and two-electrode rail-gap switch were designed. Experiments for breakdown-voltage and repetitive operation of these switches were done in different gas pressure and gap conditions. The results show the relation between breakdown-voltage and gas pressure is linear. Breakdown-voltage of two-electrode rail-gap switch with 8 mm gap can be adjusted from 90 to 125 kV at gas pressure 0.1 to 0.2 MPa. Operating voltage of trigger switch with 7 mm gap can be adjusted from 40 to 95 kV. Repetitive operation rate of these switches was up to 20 Hz with 20 kA current. Based on these switches, an 8-stage compact Marx generator was setup. Multi-pulse output with 5 or 10 Hz repetitive rate was gained in experiments. The output peak power was about 7 GW for 5 Hz, and 3.5 GW for 10 Hz with pulse width (FWHM) of 150 ns.

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伍友成, 耿力东, 何泱, 戴文峰, 曹龙博, 冯传均, 王敏华, 付佳斌, 杨宇, 张南川, 郝世荣. 100 kV重频气体开关初步研究及应用[J]. 强激光与粒子束, 2016, 28(2): 025005. Wu Youcheng, Geng Lidong, He Yang, Dai Wenfeng, Cao Longbo, Feng Chuanjun, Wang Minhua, Fu Jiabin, Yang Yu, Zhang Nanchuan, Hao Shirong. Investigation and application of 100 kV repetitive gas switches[J]. High Power Laser and Particle Beams, 2016, 28(2): 025005.

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