Electric-permanent-magnet multi-contact switch

Abstract

The invention relates to an electric-permanent-magnet multi-contact switch. The electric-permanent-magnet multi-contact switch comprises at least two static contacts and is characterized in that the backs of the static contacts are connected to the periphery of a fixed plate through permanent magnets, the front side of each static contact directly faces one movable contact, and the back of each movable contact is fixed at one end of a driver; excitation coils for changing driver magnetic poles to control the contacting and separating of the movable contacts and the static contacts wind the peripheries of the drivers, and pulse currents are applied at the ends of the excitation coils. The electric-permanent-magnet multi-contact switch has the advantages that the switch is simple in structure, the contacting and separating of the movable contacts and the static contacts are achieved by applying the pulse currents to the excitation coils, operation reliability is achieved, control convenience and flexibility are achieved, the service life of the switch is prolonged, and accident occurrence rate is lowered.

Description

technical field [0001] The invention relates to a multi-contact switch, in particular to an electric permanent magnet multi-contact switch. Background technique [0002] The multi-contact switch currently used mostly adopts the structural form of a moving contact, a static contact and a compression spring. Under the action of the compression spring, the moving contact and the static contact are combined to conduct the circuit. Due to the use of the compression spring structure, once the elasticity of the compression spring weakens, poor contact between the moving contact and the static contact will occur, the safety will deteriorate, and the normal service life will be affected. The patent document with the application number 201420848787.2 discloses a permanent magnet driven multi-contact switch that uses a driving permanent magnet to control the opening and closing of the permanent magnet moving contact and the static contact. The magnetic conduction is changed by changing...

AI Technical Summary

Problems solved by technology

Due to the use of the compression spring structure, once the elasticity of the compression spring weakens, poor contact between the moving contact and the static contact will occur, and the safety will deteriorate, affecting the normal service life

The patent document with the application number 201420848787.2 discloses a permanent magnet drive multi-contact switch that uses a drive permanent magnet to control the opening and closing of the permanent magnet moving contact and the static contact. The magnetic conduction is changed by changing the position of the rotating permanent magnet in the turntable. The magnetic poles of the static contacts have the following problems: (1) the entire multi-contact switch device is bulky and heavy; (2) it takes time to change the position of the rotating permanent magnet in the turntable, so it cannot be controlled quickly and flexibly; (3) ) requires the same number of rotating permanent magnets and magnetizers, and equiangular distances

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