Self-breakdown high-voltage gas switch based on surface modified graphite electrode
A high-voltage gas switch, graphite electrode technology, applied in electrical components, circuits, spark gaps, etc., can solve the problems of large normalized standard deviation of self-breakdown voltage and unstable self-breakdown, and achieve light weight and easy operation. , the effect of improving stability
Active Publication Date: 2021-10-26
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
[0005] The technical problem to be solved in the present invention is to provide a surface-modified graphite electrode based The self-breakdown high-voltage gas switch, by plating titanium, hafnium and other metal materials with a high emission threshold on the surface of the gas switch electrode, and digging out a ring on the electrode surface coating, exposes the graphite material with a low emission threshold
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[0028] Below in conjunction with accompanying drawing, structure of the present invention and working principle are specifically described:
[0029] Such as figure 1 As shown, the present invention consists of an insulating cavity 1, an anode rod 2, a cathode rod 3, an anode electrode 4 and a cathode electrode 5. The anode rod 2 and the cathode rod 3 are fixed on the insulating cavity 1 by bolts, the anode electrode 4 is fixed on the anode rod 2 , and the cathode electrode 5 is fixed on the cathode rod 3 . The end connected to the high-voltage power supply of the present invention is defined as the input end (left end), and the end connected to the load of the present invention is defined as the output end (right end).
[0030] The insulating cavity 1 is a cylindrical cavity with two end faces, which is composed of an insulating cylinder 101, a front insulating end plate 102 and a rear insulating end plate 103, and the insulating cavity 1 is made of insulating material. The ...
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Abstract
The invention discloses a self-breakdown high-pressure gas switch based on a surface modified graphite electrode, and aims to solve the problems of unstable self-breakdown, large self-breakdown voltage normalization standard deviation and the like of the self-breakdown gas switch due to the absence of a trigger electrode. According to the technical scheme, metal materials such as titanium and hafnium with high emission thresholds are plated on the surface of a gas switch electrode, a circular ring is dug in a plating layer on the surface of the electrode, and a graphite material with a low emission threshold is exposed. The field intensity at the surface circular ring is relatively high, and breakdown mainly occurs at the position, the emission threshold of the graphite material at the circular ring on the surface of the electrode is lower than that of surrounding metal materials such as titanium and hafnium, electron emission is facilitated, switch breakdown is more easily concentrated at the circular ring on the surface, the breakdown stability is improved, and the normalized standard deviation of breakdown voltage is reduced. On the basis of giving play to the advantages of light weight and ablation resistance of graphite, the problems that a graphite material is brittle and particles are easy to fall off are solved, and low-jitter long-time stable operation of high-pressure gas is realized.
Description
technical field [0001] The invention relates to a self-breakdown gas switch in the technical field of high-power pulse drive sources, in particular to a self-breakdown high-voltage gas switch based on a surface-modified graphite electrode. Background technique [0002] High-power pulse drive source technology is a science and technology that quickly releases low-power, long-term stored energy to the load with high power in a short period of time through a high-power pulse generator. As high-power pulse driving source technology is more and more widely used in the fields of high-energy laser, high-power microwave, biomedicine, environmental protection and material processing, high-power pulse generators are moving towards high repetition frequency, high stability and long life development in other directions. [0003] As the core device of high-power pulse driving source to realize electric pulse, high-power switch plays the role of connecting energy storage device and load,...
Claims
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IPC IPC(8): H01T1/00H01T1/20H01T1/22
CPCH01T1/20H01T1/00H01T1/22
Inventor 李嵩王俊婷曾凡正高景明蔡浩张全才钱宝良万红
Owner NAT UNIV OF DEFENSE TECH