基于Blumlein和TLT的模块化全固态纳秒脉冲发生器  

Modular solid-state nanosecond pulse generator based on Blumlein and transmission line transformer

作　　者：米彦[1] 卞昌浩 万佳仑 姚陈果[1] 李成祥[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]国网江苏省电力公司技能培训中心,苏州215000 [3]四川电力设计咨询有限责任公司,成都610041

出　　处：《仪器仪表学报》2017年第11期2858-2865,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51321063;51477022);重庆市科委自然科学基金(cstc2014jcyjjq90001;cstc2016jcyjA0500)项目资助

摘　　要：为了研究高频纳秒脉冲电场治疗肿瘤的生物医学效应,需要一种能产生高频纳秒脉冲的紧凑型脉冲电场发生器。结合Blumlein脉冲形成线和传输线变压器(TLT)提出了一种新的模块化设计的高频纳秒脉冲发生器结构,发生器可以使用更少的开关数输出电压、频率可调的高频纳秒方波脉冲。对单级和多级发生器在阻抗匹配时的脉冲形成过程进行了理论分析,并分析了多级发生器在阻抗不匹配时负载波形的变化;使用微带线设计Blumlein脉冲形成线,介绍了微带线的设计过程,同时介绍了传输线变压器的设计以及固态开关的控制策略;研制了一台小型发生器对提出的拓扑结构进行验证。最后,三级发生器在匹配负载(300Ω)上,可以输出幅值0~3 kV可调,脉宽100 ns,重复频率0~10 kHz可调的高频纳秒脉冲。In order to study the biomedical effects in the treatment of tumors exposed to high pulse repetition frequency （PRF） nanosecond pulsed electric fields, a compact pulse generator which can provide high PRF ns pulses is needed. A new configuration of pulse generator combining Blumlein line and transmission line transformer （TLT） is proposed in this paper. The modular generator can provide high PRF ns rectangular pulses whose amplitude and PRF are adjustable with less switches. In this paper, the pulse forming processes of single-stage and multi-stage generator in matching impedance are theoretically analyzed. The changes of waveforms of multi-stage generator in mismatched loads are analyzed. Microstrip line is used to design the Blumlein in the generator. And the design processes of the Blumlein and TLT are introduced. The control strategy of solid state switches is also illustrated. A small prototype is developed to verify the proposed topology. Finally, the three-stage generator can produce pulses on matched load （ 300 Ω ） with amplitude of 0 - 3 kV, pulse width of 100 ns, and PRF to 10 kHz.

关 键 词：Blumlein 传输线变压器 微带线 模块化 全固态 紧凑型脉冲发生器 

分 类 号：TM836[电气工程—高电压与绝缘技术] TH89[机械工程—仪器科学与技术]