A High-gain nanosecond pulse generator based on inductor energy storage and pulse forming line voltage superposition

2019 IEEE Pulsed Power & Plasma Science (PPPS) Pub Date : 2019-06-01 DOI:10.1109/PPPS34859.2019.9009869

Jianhao Ma, Shoulong Dong, Hongmei Liu, Liang Yu, C. Yao

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引用次数: 2

Abstract

Pulsed gas discharge is an important means of generating low temperature plasma. Short pulses with fast frontier show superior performance in terms of increasing the active particle content, ionization coefficient and electron conversion rate due to its higher voltage rise rate. The common nanosecond pulse generator is based on capacitive energy storage. Compared with the nanosecond pulse generator based on capacitive energy storage, the inductive energy storage has outstanding advantages in energy storage density, miniaturization of the device, and less influence of loop inductance. However, the inductive energy storage also suffers from problems such as limitation of disconnect switch, uncontrollable outputs and waveform distortion. In this paper, the inductance unit in the transmission line is used as the energy storage inductance, and combined with the characteristics of the rectangular pulse output of the transmission line, and the modular voltage superposition is carried out by using the propagation delay of electromagnetic wave in the transmission line to achieve high-gain rectangular nanosecond pulse output. Then we expand the design of the terminal superposition structure, optimize the magnetic field distribution between the lines to reduce the waveform distortion, and output the nanosecond short pulse. Finally, the paper analyzes the load matching characteristics of the designed pulse generator and provides experimental support for the actual application of the generator. In this paper, the superposition experiment of 10-stage inductive energy storage modules was carried out. The experimental results show that the time-delay isolation method of transmission line can effectively isolate the pulse voltage at the front and rear. The volume of the 10-stage circuit module is 25 cm*6 cm*12 cm, rectangular waveform output, the charging voltage is DC 58 V, the voltage amplitude is 8.2 kV, the voltage gain is about 140 times, the pulse duration is 23 ns and the rise time is 8 ns.

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基于电感储能和脉冲形成线电压叠加的高增益纳秒脉冲发生器

脉冲气体放电是产生低温等离子体的重要手段。快速前沿短脉冲由于具有较高的电压上升速率，在提高活性粒子含量、电离系数和电子转化率方面表现出优越的性能。常用的纳秒脉冲发生器是基于电容储能的。与基于电容储能的纳秒脉冲发生器相比，电感储能在储能密度、器件小型化、回路电感影响小等方面具有突出的优势。但电感式储能也存在断开开关限制、输出不可控、波形失真等问题。本文采用传输线中的电感单元作为储能电感，结合传输线矩形脉冲输出的特性，利用电磁波在传输线中的传播延迟进行模块化电压叠加，实现高增益的矩形纳秒脉冲输出。然后对终端叠加结构进行扩展设计，优化线间磁场分布以减小波形畸变，输出纳秒级短脉冲。最后对所设计的脉冲发生器的负载匹配特性进行了分析，为脉冲发生器的实际应用提供了实验支持。本文进行了十级感应储能模块的叠加实验。实验结果表明，传输线延时隔离方法能有效隔离前后脉冲电压。10级电路模块体积为25cm * 6cm * 12cm，矩形波形输出，充电电压为直流58v，电压幅值为8.2 kV，电压增益约为140倍，脉冲持续时间为23ns，上升时间为8ns。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2019 IEEE Pulsed Power & Plasma Science (PPPS)

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