Multipole field breakdown type vacuum trigger switch

Abstract

The invention discloses a multipole field breakdown type vacuum trigger switch. In the invention, a top electrode and a bottom electrode of the trigger switch respectively comprise electrode bottom columns, electrode platforms and a plurality of columnar electrodes; the columnar electrodes of the top electrode and the bottom electrode extend in opposite directions and are staggered; gap widths between every two adjacent columnar electrodes are equal and are same as the gap widths between the tops of the columnar electrodes and the corresponding electrode platforms; the electrode platform of the bottom electrode is provided with a notch and a trigger electrode; the trigger electrode comprises a trigger needle and a trigger insulation sleeve ring; the axial section of the trigger needle is T-shaped; the trigger insulation sleeve ring is of a boss structure and embedded in the notch; the trigger needle comprises a trigger needle head and a trigger needle rod; one end of the trigger needle rod is connected with the trigger needle head, and the other end of the trigger needle rod passes through the trigger insulation sleeve ring and the electrode platform; the upper surface of the trigger needle head is lower than the upper surface of the electrode platform of the bottom electrode; and gaps exist between corners and the electrode platform of the bottom electrode. The trigger switchhas long service life and strong through-current capability under the condition of big current.

Description

technical field [0001] The invention relates to the technical field of pulse power, in particular to a multi-pole field breakdown vacuum trigger switch. Background technique [0002] The switching element is one of the core components of the pulse power system, and it is also the main technical bottleneck. High-power switching devices are required to work under high voltage and high current, and require high speed, high reliability, and long life. Vacuum trigger switch is a switch form that can meet the above requirements at the same time. It has been widely used in high-power pulses, such as high-power lasers, high-power microwave power supplies, and electromagnetic emission technology. [0003] The structure of the main electrode of the traditional vacuum trigger switch is generally flat, and the trigger electrode is connected with one main electrode. After the trigger pulse is applied to the switch, the initial plasma generated by the trigger discharge diffuses into the ...

AI Technical Summary

Problems solved by technology

When the conduction current increases, the energy of the vacuum arc increases, and the heat load on the electrode surface also increases, resulting in increased electrode ablation and limited flow capacity.

In addition, after the arc is extinguished, the metal vapor generated by the vacuum arc is deposited on the surface of the insulating medium of the trigger electrode, which greatly affects the life of the trigger electrode.

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