Novel permanent-magnet composite magnetic field contact structure and vacuum arc-extinguishing chamber employing same

Abstract

The invention provides a novel permanent-magnet composite magnetic field contact structure and a vacuum arc-extinguishing chamber employing the same. The contact structure comprises a pair of transverse magnetic field contact blades and a pair of permanent-magnet composite structures, wherein the pair of permanent-magnet composite structures is arranged at the back of the transverse magnetic field contact blades; a magnetic field is generated by a contact gap after static-end permanent-magnet groups and running-end permanent-magnet groups are coordinated with each other; and the magnetic fields generated by a static-end transverse magnetic field contact blade and a running-end transverse magnetic field contact blade in an arcing process act on an electric arc, so that effective control on the electric arc is achieved. According to the novel permanent-magnet composite magnetic field contact structure and the vacuum arc-extinguishing chamber, the problems that the structure of the contact surface is too complicated and the electric arc control ability of a permanent magnet is limited in existing composite magnetic field contact structure and permanent-magnet contact structure are solved.

Description

technical field [0001] The invention belongs to the technical field of high-current vacuum circuit breakers, and in particular relates to a novel permanent magnet compound magnetic field contact structure and a vacuum interrupter for its application. Background technique [0002] The application of vacuum circuit breakers in the entire power system is developing rapidly, but, in the process of development, the requirements for vacuum circuit breakers are also constantly improving. In order to improve the short-circuit breaking capability of the vacuum interrupter, the arc magnetic field control technology is introduced in the interrupter. [0003] Magnetic field control technology mainly includes transverse magnetic field control technology and longitudinal magnetic field control technology. Among them, the transverse magnetic field technology uses a specific contact structure so that the current path formed during the arcing process forms a transverse magnetic field perpen...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a new type of permanent magnet composite magnetic field contact structure and a vacuum interrupter for its application, which solves the problems of the existing composite magnetic field contact structure and permanent magnet contact structure. The existing contact surface structure is too complex, and the permanent magnet arc control ability is limited

Images