摘要
场畸变开关是脉冲功率系统的关键器件,其低时延和低抖动性能参数是输出高幅值、快前沿脉冲的重要保障。在Marx发生器前级所用的场畸变开关,其要求时延和抖动尽可能小,才能保证Marx发生器装置输出特性具有快前沿、低抖动的稳定性。单孔触发电极的场畸变开关由于初始有效电子产生和扩散较慢导致时延较长,多孔触发电极结构的提出在一定程度上可以降低时延,但是抖动会增大,对于多孔触发电极场畸变开关如何同时保证低时延和低抖动需要进一步研究。因此,该文通过对传统单孔触发电极结构进行优化改进,提出了改变孔径大小和孔的个数的优化组合设计用于实现低时延,同时还显著地改善了抖动。实验结果表明:5 mm十六孔触发电极结构的场畸变开关在工作系数为71.1%~85.3%时,即工作电压在20~24 kV时,时延在45.2~41.1 ns之间,抖动在6.87~5.87 ns之间,相较于传统的单孔触发电极结构,其时延和抖动分别下降了14.8%和16.1%,性能提升明显。该文所设计的场畸变开关满足工程应用需求,为研究多孔型场畸变开关的性能提供了新思路。
The field distortion switch used in the front stage of the Marx generator requires the delay and jitter to be as small as possible to ensure the stability of the output characteristics of the Marx generator device with fast front and low jitter.The field distortion switch of the single hole trigger electrode has a high delay due to the slow generation and diffusion of the initial effective electrons.The proposed structure of the porous trigger electrode can reduce the delay to a certain extent,but the jitter will increase.How to ensure low delay and low jitter at the same time requires further research on the field distortion switch of the porous trigger electrode.Therefore,by optimizing and improving the traditional single-hole trigger electrode structure,this paper proposes an optimized combination design that changes the size and number of apertures to achieve low delay and significantly improve jitter.The traditional type of 10 mm single-hole trigger electrode structure,10mm seven-hole trigger electrode structure,5 mm seven-hole trigger electrode structure are designed for electric field simulation optimization.On this basis,a 5 mm 16-hole trigger electrode structure was designed based on the number of apertures and the size of apertures.The simulation and experiment were compared with the traditional structure.When the working pressure is 0.1 MPa,the insulating medium is air,and the output of the trigger voltage source is 9.42 kV/32 ns,the trigger characteristics of the three trigger electrode structures of 5 mm 16-hole,10 mm single-hole,and 10 mm seven-hole were tested.The experimental data show that when the working coefficient of the field distortion switch with 5mm 16-hole trigger electrode structure is 71.1%~85.3%,that is,when the working voltage is 20~24 kV,the delay is between 45.2~41.1 ns,and the jitter is between 6.87~5.87 ns.Compared with the traditional single-hole trigger electrode structure,the delay and jitter are reduced by 14.8%and 16.1%respectively,and the performance is improved significant
作者
程显
王振伟
吕彦鹏
陈硕
安永科
Cheng Xian;Wang Zhenwei;LüYanpeng;Chen Shuo;An Yongke(School of Electrical Engineering Zhengzhou University,Zhengzhou 450001 China;Henan Engineering Research Center of Power Transmission&Distribution Equipment and Electrical Insulation,Zhengzhou 450001 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2023年第24期6807-6816,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(51977195,52107170)
河南省重大科技专项(221100240500)
河南省优秀青年科学基金项目(202300410370)
河南省科技创新人才项目(21HASTIT022)
河南省高校学科创新基地项目(CXJD2021007)
中国博士后面上项目(2021M692901)
河南省自然科学基金项目(232300421329)
河南省科技攻关项目(222102210312)资助。
关键词
场畸变开关
触发电极结构
工作系数
击穿时延
击穿抖动
Field distortion switch
trigger electrode structure
working coefficient
breakdown time delay
breakdown jitter
