基于吹气开关的重复频率纳秒脉冲源的研究  

Research on the Repetitive Frequency Nanosecond Pulse Power Supply Based on Blowing Switch

作　　者：李雨泰 刘志刚 黎晗东 罗海云[1] 邹晓兵[1] 王新新[1] LI Yutai;LIU Zhigang;LI Handong;LUO Haiyun;ZOU Xiaobing;WANG Xinxin(Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《高电压技术》2021年第9期3380-3386,共7页High Voltage Engineering

基　　金：国家自然科学基金(52077117,52041701)。

摘　　要：为可靠驱动重复频率纳秒脉冲放电,研究设计了一款基于吹气开关的重复频率纳秒脉冲电源,可输出幅值可变,脉宽数十至数百纳秒的准方波脉冲。在本研究的实验条件下,输出脉冲的最高有效工作频率可超过1.5k Hz。该电源采用脉冲形成线原理产生高电压纳秒脉冲,开关采用同轴结构的吹气式自击穿气体开关,风机吹气用于加快气体开关的绝缘恢复速度,进而提高气体开关的极限工作频率。实验结果表明:在不加吹气风机时,气体开关绝缘恢复情况较差,存在多次低电压击穿过程,故脉冲形成线越短,纳秒脉冲电源的有效工作频率极限越低;使用吹气风机后,开关的多次低电压击穿现象在一定程度上被抑制,纳秒脉冲电源的有效工作频率极限随脉冲形成线长度的缩短而增大;且风机风速越快,气体开关绝缘恢复越好,纳秒脉冲电源的有效工作频率越高。最后用此重复频率纳秒脉冲电源成功驱动了平行板结构的介质阻挡放电模块。In order to drive the repetitive nanosecond pulse discharge reliably, a repetitive nanosecond pulse power supply based on blowing switch is designed, which can output quasi square pulse with variable amplitudes and pulse widths of tens to hundreds of nanoseconds. Under the experimental conditions, the maximum effective frequency of the output pulse can exceed 1.5 kHz. The power supply uses the principle of pulse forming line to generate high voltage nanosecond pulse. The switch adopts the coaxial structure of blowing type self-breakdown gas switch, and the fan blowing is used to speed up the insulation recovery speed of the gas switch, so as to improve the limit working frequency of the gas switch. The experimental results show that the insulation recovery of the gas switch is poor without blowing fan, and there are many low-voltage breakdown processes. Therefore, the shorter the pulse forming line is, the lower the effective frequency limit of the pulse power supply will be. After the blower being used, the low voltage breakdown of the switch is suppressed to some extent, and the effective frequency limit of the pulse power supply increases with the shortening of the pulse forming line length. The faster the wind speed of the fan is, the better the insulation recovery of the gas switch will be, and the higher the effective working frequency of the pulse power supply will be. Finally, the dielectric barrier discharge module with parallel plate structure has successfully been driven by this repetitive nanosecond pulse power supply.

关 键 词：脉冲形成线 纳秒脉冲电源 吹气开关 气体开关 介质阻挡放电 

分 类 号：TM564[电气工程—电器]