A DC Contact Structure with Strong Transverse Magnetic Field and Its Application DC Vacuum Interrupter

Abstract

A DC contact structure with strong transverse magnetic field and a DC vacuum arc extinguish chamber using that same are disclosed. The DC contact structure with strong transverse magnetic field comprises a movable side contact combination structure and a static side contact combination structure in a vacuum arc extinguishing chamber. The movable side contact assembly structure comprises a movableside conductive rod, a movable side transverse magnetic field cup-shaped contact structure welded to one end of the movable side conductive rod, and a movable side annular grooved contact piece weldedto an end of the movable side transverse magnetic field cup-shaped contact structure. The static side contact assembly structure comprises a static side conductive rod, a static side transverse magnetic field cup-shaped contact structure welded to one end of the static side conductive rod, and a static side annular grooved contact piece welded to an end of the static side transverse magnetic field cup-shaped contact structure. The slot rotation direction of the moving side transverse magnetic field cup-shaped contact structure and the static side transverse magnetic field cup-shaped contact structure are opposite. The DC vacuum interrupter comprises a DC contact structure with strong transverse magnetic field. The invention greatly enhances the strength of the transverse magnetic field acting on the vacuum arc, and simultaneously realizes the moving step of the arc column.

Description

technical field [0001] The invention belongs to the technical field of vacuum circuit breakers and vacuum DC breaking, and in particular relates to a DC contact structure with a strong transverse magnetic field and a DC vacuum interrupter for its application. Background technique [0002] With the rapid development of related research and application in the field of direct current at home and abroad, there is a huge market demand for medium and low voltage direct current circuit breakers. Compared with AC power supply systems, DC transmission technology has unique technical advantages in the field of large-capacity, long-distance power transmission and distribution. Although the theory of DC transmission is relatively mature, compared with the flexible and diverse methods of AC transmission system, the development of DC transmission technology has been greatly limited and restricted. The main reason is the lack of practical, convenient and reliable medium and high voltage DC...

AI Technical Summary

Problems solved by technology

[0003] Existing vacuum circuit breakers are mainly used in AC current loop systems. In addition, vacuum switches also have certain applications in the topological structure of DC current breaking. However, the direct breaking of DC current by vacuum circuit breakers has not yet been realized.

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