Permanent magnet linear thrust operating mechanism used for vacuum circuit breaker

Abstract

A permanent magnet linear thrust operating mechanism used for a vacuum circuit breaker belongs to the technical field of vacuum circuit breaker operating mechanisms. The permanent magnet linear thrust operating mechanism is formed by connecting a four-bar linkage with the moving contact of the vacuum circuit breaker; a main permanent magnet and an auxiliary permanent magnet are arranged on the inner wall of a primary core of the permanent magnet linear thrust operating mechanism; the holding of the circuit breaker in a switching / closing position is achieved through the auxiliary permanent magnet; and the permanent magnet linear thrust operating mechanism comprises an armature winding, a secondary core, the primary core, the auxiliary permanent magnet, a transmission rod, a magnetism isolating material and the main permanent magnet. The permanent magnet linear thrust operating mechanism reduces the complex structure of a motor, has a small mass and a high speed, and decreases useless work; and by arranging the auxiliary permanent magnet, the hold function is achieved.

Description

technical field [0001] The invention belongs to the technical field of vacuum circuit breaker operating mechanisms, in particular to a permanent magnet linear thrust operating mechanism for vacuum circuit breakers, which is suitable for intelligent operation of circuit breakers. Background technique [0002] The circuit breaker is an important switching device in the power system, which is responsible for the dual tasks of control and protection. For high-voltage circuit breakers, it is required that the operating mechanism can not only obtain a higher opening and closing speed, but also quickly realize automatic reclosing operation. The operating mechanism plays an important role in the circuit breaker. It not only ensures the long-term operation reliability of the circuit breaker, but also meets the requirements of the arc extinguishing characteristics for the operating mechanism. The operating mechanism should achieve good opening and closing actions of the high-voltage...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the above traditional circuit breaker operating mechanism, such as many parts, complex transmission mechanism, high manufacturing process requirements, uncontrollable movement process, and lack of holding function, the present invention provides a permanent vacuum circuit breaker. Magnetic Linear Thrust Actuator

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