A Self-breakdown High Voltage Gas Switch Based on Surface Modified Graphite Electrode
A high-voltage gas switch and graphite electrode technology, which is applied to 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 convenient operation , the effect of improving stability
Active Publication Date: 2022-07-05
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 described in detail:
[0029] like 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 of the present invention connected to the high-voltage power supply is defined as the input end (left end), and the end of the present invention connected to the load is defined as the output end (right end).
[0030] The insulating cavity 1 is a cylindrical cavity with two end faces, and is composed of an insulating cylinder 101, a front insulating end plate 102 and a rear insulating end plate 103. The insulating cavity 1 is made of insulating material. The front in...
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Abstract
The invention discloses a self-breakdown high-voltage gas switch based on a surface-modified graphite electrode, which aims to solve the problem that the self-breakdown gas switch is unstable due to the lack of a trigger electrode, and the normalized standard deviation of the self-breakdown voltage is large. And other issues. The technical solution is to coat metal materials with high emission thresholds such as titanium and hafnium on the surface of the gas switch electrode, and dig a ring out of the electrode surface coating to expose the graphite material with low emission thresholds. The field strength at the surface ring is higher, and the breakdown mainly occurs there; the emission threshold of the graphite material at the electrode surface ring is lower than that of the surrounding metal materials such as titanium and hafnium, which is conducive to electron emission, and the switch breakdown is easier to concentrate on At the surface ring, the stability of breakdown is improved and the normalized standard deviation of breakdown voltage is reduced. On the basis of taking advantage of the light weight and ablation resistance of graphite, the invention solves the problems of brittle graphite material and easy particle fall off, and realizes low jitter and long-term stable operation of high-pressure gas.
Description
technical field [0001] The invention relates to a self-breakdown gas switch in the technical field of high-power pulse driving 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 energy stored at low power and for a long time to the load with high power in a short period of time through a high-power pulse generator. With the increasing use of high-power pulse drive source technology in high-energy lasers, high-power microwaves, 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 the high-power pulse driving source to realize the electric pulse, the high-power switch plays the role of connecting the energy storage de...
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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