Arc-quenching non-polar contactor

Abstract

The invention discloses an arc-quenching non-polar contactor. The arc-quenching non-polar contactor comprises an electromagnetic component (25), a moving iron core (17), a static iron core (19), a push rod (20), a moving contact (23), a fixed electrode (1), and a case (2), wherein the fixed electrode is mounted on the case (2) and an insulator (4); the insulator (4) is a ceramic body; a magnetic steel (6) is respectively mounted at corresponding positions on two outer sides of the end part of the moving contact out of the ceramic body; and the two magnetic steels (6) are wrapped by a magnetic steel frame (5), and are arranged in such a manner that the magnetic properties are in the same direction. The arc generated at the moment when the moving contact is separated from the fixed electrode can be guided to the ceramic body by the opposite magnetic circuits generated by the two magnetic steels and the magnetic properties of the magnetic steels so as to eliminate and neutralize the arc, which directly results in non-polarity of the fixed electrode, thereby effectively preventing damage to the internal components of the contactors, improving convenience in use and installation, improving the contactor quality and prolonging the service life of the contactor product.

Description

technical field [0001] The invention relates to a switch capable of turning on or cutting off a high-voltage current power supply, in particular to a contactor. Background technique [0002] A contactor is an electrical product equipped to control power supply to a line, and is widely used in household appliances and industrial products. In recent years, with the development of electric vehicles (such as hybrid vehicles, fuel cell vehicles, etc.), contactors are being used as their power switches. The working principle of the contactor is to push the push rod through the moving iron core to make the moving contact piece contact or disconnect the fixed electrode, so as to turn on or cut off the high-voltage current power supply. The external power supply of the fixed electrode is polarized (that is, it needs to be correct connected to the positive and negative poles), an arc will be generated between the two at the moment when the movable contact piece is separated from the ...

AI Technical Summary

Problems solved by technology

The working principle of the contactor is to push the push rod through the moving iron core to make the moving contact piece contact or disconnect the fixed electrode, so as to turn on or cut off the high-voltage current power supply. The external power supply of the fixed electrode is polarized (that is, it needs to be correct connected to the positive and negative poles), an arc will be generated between the two at the moment when the movable contact piece is separated from the fixed electrode, and the extension length and duration of the arc will vary according to the magnitude of the voltage and current. It will cause certain damage to the internal components of the contactor and shorten the service life of the contactor

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