Method for reducing contact material loss of double-coiled bistable permanent-magnet mechanism contactor

Abstract

The invention discloses a method for reducing the loss of contact material in a double-coil bistable permanent magnet mechanism contactor, including the preparation of a double-coil bistable permanent magnet mechanism contactor; and combining arc plasma and contact material The mechanism of interaction, the conversion law of metal-containing vapor arc to gas arc, the transfer mechanism of electrode materials, the interruption of AC current without arc or less arc, etc., intelligently control the contactor of permanent magnet mechanism, so that the contactor can be disconnected and connected Optimum dynamics are obtained in the circuit process. Thus: ① Realize no bouncing in the closing process of the contactor. ②Using the law of arc state transition, the transfer of contact material generated by metal phase arc and gas phase arc is balanced, and the net transfer of contact material during the opening process of the contactor is zero. ③Realize no-arc or less-arc breaking of AC contactors. ④Using the principle of reversing the transfer direction of the contact material, the zero loss of the contact material of the DC contactor working under constant load is realized.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances of power transmission and distribution equipment, and relates to a contactor, in particular to a method for reducing the material loss of a contactor of a double-coil bistable permanent magnet mechanism contactor. Background technique [0002] At present, in the field of low-voltage electrical appliances, electromagnetic contactors are widely used. Electromagnetic contactors have the disadvantages of high energy consumption, high noise and high contact bounce, especially due to the occurrence of arc discharge, there are complex physical and chemical processes between the arc plasma and the surface of the contact (electrode), and the effect of the arc Lead to the melting, evaporation or splashing of the contact material in the form of droplets, welding and even loss of electrical contact function. For a long time, the loss of contact material has been the most important factor rest...

AI Technical Summary

Problems solved by technology

[0015] In view of the defects or deficiencies in the above-mentioned prior art, in order to solve the problems of high energy consumption, contact bouncing and noise of the electromagnetic contactor, especially by realizing no loss or less loss of the contact material, the contactor's performance is greatly improved. Working electrical life and working reliability, the object of the present invention is to propose a method for reducing the contact material loss of the double-coil bistable permanent magnet mechanism contactor

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