基于模块化Marx电路和传输线变压器的重频纳秒脉冲源设计  

Design of Repetitive Nanosecond Pulse Generator Based on Modularized Marx Circuit and Transmission Line Transformer

作　　者：李江涛[1] 赵政[1] 钟旭[2] 曹辉[1] 郑敏军 Li Jiangtao;Zhao Zheng;Zhong Xu;Cao Hui;Zheng Minjun(School of Electrical Engineering Xi’an Jiaotong University Xi’an 710049 China;Tianfu Electric Power Supply Company State Grid Sichuan Electric Power Company Chengdu 610041 China)

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]国网四川省电力公司天府新区供电公司,成都610041

出　　处：《电工技术学报》2017年第8期121-128,共8页Transactions of China Electrotechnical Society

摘　　要：重频纳秒脉冲激励的大气压等离子体放电具有反应活性高等优点。设计了基于模块化雪崩三极管Marx电路和传输线变压器的重频纳秒脉冲源。计算不同Marx模块的导通时延和输出波形的抖动,研究了磁心数量、位置和形状对于输出波形的影响。磁心电感越大、外径与内径之比越大,且位于传输线变压器第一级和最高一级时对脉冲叠加效率的提升作用越明显。提出直接叠加和传输线变压器两种脉冲叠加方式组合的方法,进一步提高输出电压。整体脉冲源可以在50~300Ω负载产生2~14k V,高阻负载产生4~25k V,前沿3.8ns,脉宽7~15ns,重复频率0~10k Hz的重频纳秒脉冲电压,装置结构紧凑,参数调节灵活,方便携带。Atmospheric pressure plasma discharge excited by repetitive nanosecond pulsedvoltage has high reactive ability.A repetitive nanosecond pulse generator was designed based on themodularized avalanche transistor Marx circuit and transmission line transformer(TLT).The delay timeand jitter of output pulse waveform of different Marx modules were calculated.The impacts ofmagnetic cores quantity,position and dimension on the output pulse amplitude were analyzed.Thepulse combination efficiency of TLT was remarkably improved by increasing the induction,increasingthe ratio of outer diameter to inner diameter of magnetic cores and adopting magnetic cores on the firstand top stages.Utilizing both the direct combination and TLT,the amplitude of output pulse was furtherimproved.The generator can produce2～14kV pulses into50～300W resistive load and4～25kVpulses into high impedance load,where the pulses have3.8ns rise time,7～15ns pulse width and0～10kHz repetitive frequency.The output parameters of the compact generator can be adjusted flexibly.

关 键 词：雪崩三极管 MARX电路 传输线变压器 脉冲叠加 等离子体电源 

分 类 号：TM832[电气工程—高电压与绝缘技术]