P型开关截尾自触发方波脉冲叠加器  

Self-triggering square-wave pulse adder with P-channel switches

作　　者：李孜 吴路生 饶俊峰 姜松 Li Zi;Wu Lusheng;Rao Junfeng;Jiang Song(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 210093,China;Suzhou Institute of Biomedical Engineering and Technology,Chinese Academy of Sciences,Suzhou 215163,China)

机构地区：[1]上海理工大学机械工程学院,上海210093 [2]中国科学院苏州生物医学工程技术研究所,江苏苏州215163

出　　处：《强激光与粒子束》2025年第3期42-49,共8页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(12205192);姑苏青年领军人才项目(ZXL2023210)。

摘　　要：基于自触发技术提出了一种带截尾功能的方波脉冲叠加器。N型开关与P型开关串联形成特殊的半桥结构,只需要提供一路隔离双极性信号控制第一级的充电和放电开关,所有其他级的开关逐级导通和关断,即可产生高压方波脉冲。该技术不仅大幅简化了脉冲叠加器的驱动电路,还实现了截尾功能,产生快速前后沿的准方波脉冲。并且利用耗尽型N型开关的自动导通特点实现了无需控制的自取电,显著提升驱动电路的绝缘水平。搭建了9级电源样机进行实验验证,实验结果表明:在10kΩ阻性负载上产生了稳定的重频正极性方波脉冲,电压幅值2.3~3.6kV可调,脉宽1~10μs可调,频率0~1kHz可调,前后沿在100ns左右,且随着工作电压的升高而加快。10kΩ和3nF阻容串联负载下波形仍然是较好的方波脉冲,脉冲前后沿与阻性负载相比没有明显变慢。该脉冲叠加器结构紧凑,有利于实现固态脉冲电源的小型化。This paper proposes a square wave pulse adder with truncation function based on the self-triggering technology.The N-type switch and the P-type switch are connected in series to form a special half-bridge structure,which only needs to provide an isolated bipolar signal to control the first-stage charging and discharging switches.All other switches are turned on and off step by step to generate high-voltage square wave pulses.This technology not only greatly simplifies the driving circuit of the pulse adder,but also realizes the truncation function to generate quasi-square wave pulses with fast front and back edges.By using the automatic conduction characteristics of the depleted N-type switch,the self-charging without control is realized,and the insulation level of the drive circuit is significantly improved.A 9-stage power supply prototype is built for experimental verification,and the the experimental results show that a stable repetitive positive square wave pulse is generated on a 10 kΩresistive load.The voltage amplitude is adjustable from 2.3 kV to 3.6 kV,the pulse width is adjustable from 1μs to 10μs,and the frequency is adjustable from 0 kHz to 1 kHz.The front and rear edges are both about 100 ns,and accelerate with the increase of operating voltage.The waveform under 10 kΩand 3 nF resistance-capacitance series load is still a good square wave pulse,and the front and rear edges of the pulse do not slow down significantly with the resistance load.The compact structure of the pulse adder can help to miniaturize solid-state pulse generators.

关 键 词：自触发驱动 脉冲叠加器 自取电 脉冲电源 

分 类 号：TM832[电气工程—高电压与绝缘技术]