基于PFN-Marx的准方波脉冲源的波形优化研究  

Research on waveform optimization for quasi-square wave pulse source based on PFN-Marx

作　　者：江进波 任应杰 李毅 张家兴 赵鑫 徐林 欧阳善川 Jiang Jinbo;Ren Yingjie;Li Yi;Zhang Jiaxing;Zhao Xin;Xu Lin;Ouyang Shanchuan(College of Engineering and New Energy,China Three Gorges University,Yichang 443002,China;China Gezhouba Group Survey and Design Co.,Ltd.,Wuhan 430000,China;Hunan Yunjian Group Co.,Ltd.,Changsha 410100,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]中国葛洲坝集团勘测设计有限公司,武汉430000 [3]湖南云箭集团有限公司,长沙410100

出　　处：《强激光与粒子束》2025年第3期50-56,共7页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(51707105);强脉冲辐射环境模拟与效应全国重点实验室开放基金项目(SKLIPR2008)。

摘　　要：脉冲功率驱动源是高功率微波技术的关键部分,其输出波形质量直接影响高功率微波器件的输出,针对脉冲功率驱动源输出波形平顶存在的振荡问题,设计并研制了一套基于PFN-Marx的紧凑化脉冲功率驱动源并进行波形优化,通过PSpice仿真分析了不同结构的PFN-Marx发生器的参数,从而确定了PFN-Marx发生器的节数与级数;将输出波形存在的振荡问题转化为波形平顶区域各极值点距离基准值的偏移程度,以平顶纹波误差最小为目标,以均方根误差构建目标函数,在Simulink中建立电路模型,结合MATLAB遗传算法,对PFN的电感进行不断迭代优化,最后确定一组最优值,重新设计电感结构,使其可以方便快捷调整电感值,以此实现波形优化。优化后的单级PFN在10Ω负载上输出波形前沿24.4 ns,脉宽93.6 ns,其平顶性能良好。装配完成的7级PFN-Marx发生器在充电电压53.8kV、负载阻抗75Ω条件下,输出准方波波形的峰值为189.2kV,脉宽93.2ns,前沿8.4ns,后沿33.6ns,纹波系数为3.5%。Pulsed power drive source is a key part of high power microwave technology.The quality of the output waveform of pulsed power drive source directly affects the output of high power microwave devices.Aiming at the oscillation problem of the flat-top output waveform of pulse power drive source,we designed and developed a compact pulsed power drive source based on PFN-Marx,and optimized the waveform.The parameters of PFN-Marx generators with different structures are analyzed by PSpice simulation,so as to determine the number of sections and levels of the PFN-Marx generator;the oscillation problem of the output waveform is converted into the degree of deviation of each extreme point from the reference value in the flat-top area of the waveform.The objective function is constructed with the root mean square error with the minimum flat-top ripple error as the goal,and the circuit model is established in Simulink.Combined with the MATLAB genetic algorithm,the inductance of the PFN is continuously iteratively optimized.Finally,a set of optimal values is determined,and the inductance structure is redesigned to adjust the inductance value conveniently and to achieve quick waveform optimization.The optimized single-stage PFN outputs a waveform with a leading edge of 24.4 ns and a pulse width of 93.6 ns on a 10Ωload,and it has good flat-top performance.The assembled 7-stage PFN-Marx generator has an output quasi-square wave under a charging voltage of 53.8 kV and a load impedance of 75Ω.The pulse peak amplitude is 189.2 kV,pulse width is 93.2 ns,rise time is 8.4 ns,decrease time is 33.6 ns,and the ripple coefficient is 3.5%.

关 键 词：脉冲功率 PFN-Marx 遗传算法 电感调节 波形优化 

分 类 号：TM89[电气工程—高电压与绝缘技术]