A plasma jet switch device

Abstract

The invention discloses a plasma injection switch device. The plasma injection switch device comprises a first main electrode, a second main electrode, an insulating ring, a trigger pin electrode and a trigger circuit. The first main electrode is a planar electrode or a semispherical electrode. The second main electrode is an inwards-concave curved-surface electrode. The trigger pin electrode is covered with the insulating ring. A plasma injection cavity is formed by the insulating ring, the trigger pin electrode and the second main electrode jointly. A nozzle opening of the plasma injection cavity is located in the middle or center of the second main electrode. The trigger pin electrode is in a long and thin conical surface pin head shape. The trigger circuit is of a double-secondary-winding pulse transformer structure. Through the structure of the curved-surface main electrode, the center of the electrode can be prevented from being excessively ablated, blockage of a nozzle and accumulation of ablated materials in the center are avoided, and the service life of a plasma injection switch is prolonged. Due to the trigger circuit, it can be guaranteed that trigger currents cannot be rapidly attenuated, more abundant plasma can be formed, and the injection height of the plasma is increased.

Description

technical field [0001] The invention belongs to the technical fields of high-voltage electrical appliances and pulse power, and relates to a plasma jet switch device. Background technique [0002] In the past two years, in order to solve the problem of reliable triggering of gas spark switches under extremely low operating coefficients, China's Tie Weihao, Liu Shanhong and others proposed the jet plasma triggering technology. This gas spark switch is based on the traditional three-electrode field-distorted gas switch structure, and a plasma injection cavity consisting of an electrode plate, an insulating ring and a needle electrode is embedded inside the trigger electrode. A spark discharge inside the injection chamber is induced by applying a trigger pulse, generating a large number of charged particles. At the same time, the heat generated by the discharge heats the gas in the injection chamber, and the discharge ablates the insulating material to generate a large amount ...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide a plasma jet switch device, aiming to solve the problem of poor technical performance of the jet plasma switch in the prior art

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