Disc type laminated gyromagnetic transversely-blowing vacuum arc extinguishing chamber

Abstract

The invention belongs to the field of vacuum circuit breakers and particularly relates to a disc type laminated gyromagnetic transversely-blowing vacuum arc extinguishing chamber. The vacuum arc extinguishing chamber comprises a conducting pole (1), a contact cup bottom (2), an iron core (7) and a contact cup (3), wherein the contact cup bottom (2) and the contact cup (3) are fixedly connected with the conducting pole (1) sequentially in a matching way; circulating tanks are formed in the contact cup (3) at equal intervals; a drift angle between each circulating tank and the longitudinal axial line of the conducting pole (1) is 15 to 35 degrees; the iron core (7) is embedded into the contact cup (3); winding grooves (6) are formed in the iron core (7) at equal intervals; coil windings (8) are embedded into the winding grooves (6); and over two groups of coil windings (8) are embedded into the winding grooves (6) at certain angles theta. Arc voltage can be reduced under the action of the strength of a rotary magnetic field and the action of a longitudinal magnetic field at the same time, an arc column is driven to be uniformly distributed on the surface of an anode, the release of arc energy is accelerated, and the breaking ability of the vacuum circuit breakers is improved.

Description

Technical field [0001] The invention belongs to the field of vacuum circuit breakers, and particularly relates to a disc-shaped stacked gyromagnetic cross-blown vacuum interrupter. Background technique [0002] The vacuum circuit breaker is named after its arc extinguishing medium and the insulating medium of the contact gap after the arc extinguishing are high vacuum; it has the advantages of small size, light weight, suitable for frequent operation, and no need to overhaul the arc extinguishing. Chinese applications are more popular. In 1893, Rittenhouse in the United States proposed a vacuum interrupter with a simple structure and obtained a design patent. In 1920, the Swedish Foga company made a vacuum switch for the first time. The research results published by Sorenson and others in the United States in 1926 also showed the possibility of breaking current in vacuum, but due to the small breaking capacity and the limitation of the development level of vacuum technology and...

AI Technical Summary

Problems solved by technology

The Lorentz force generated by the interaction between the transverse magnetic field contact and the arc current makes the arc move in the circumferential direction, and the transverse magnetic field will bend and elongate the moving arc, which will increase the arc voltage and arc energy, resulting in limited breaking capacity , and the ablation degree of the contact is still stronger when the arc is concentrated than when the arc is diffused, the density of the remaining plasma in the arc gap is still high when the current crosses zero, and the re-ignition phenomenon will still occur when the recovery voltage is high

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