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Method for intensifying arc gap arc-blowing magnetic flux to improve electric appliance arc-extinguishing capability

An electrical and arc gap technology, applied in circuits, electrical switches, electrical components, etc., can solve the problems of reduced electrical life and work reliability, affecting the normal operation of the system, and electrical contact burnout, etc. power, improve the arc extinguishing ability of electrical appliances, and increase the effect of blowing arc magnetic flux outward

Inactive Publication Date: 2018-08-10
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Arc is an inevitable phenomenon during the operation of electrical appliances. The arc causes serious burning of the electrical contacts, which not only greatly reduces the electrical life and working reliability, but also the contacts may be welded, causing serious accidents, thus affecting the normal operation of the entire system.

Method used

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  • Method for intensifying arc gap arc-blowing magnetic flux to improve electric appliance arc-extinguishing capability
  • Method for intensifying arc gap arc-blowing magnetic flux to improve electric appliance arc-extinguishing capability
  • Method for intensifying arc gap arc-blowing magnetic flux to improve electric appliance arc-extinguishing capability

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: A method for strengthening arc-gap blowing magnetic flux and improving arc extinguishing ability of electrical appliances, including a moving contact bridge 10, a moving contact 20, a U-shaped static contact bridge 30, a static contact 50, and a U-shaped magnetic conductive part 60 , the magnetic guide plate 70, the moving contact 20 is arranged on the lower surface of the moving contact bridge 10, the static contact bridge 30 is arranged under the moving contact bridge 10 and is U-shaped, and the static contact bridge 30 is provided with a set corresponding to the moving contact 20. The static contact 50.

[0021] A U-shaped magnetic conductive part 60 is installed on each U-shaped static contact bridge 30 of the electrical appliance, and the U-shaped magnetic conductive part 60 is set on the side of the U-shaped static contact bridge 30 close to the static contact 50. Facing the moving contact 20, the U-shaped end face of the U-shaped magnetic conducting...

Embodiment 2

[0023] Embodiment 2: Compared with Embodiment 1, the upper end surface of the U-shaped magnetic permeable member 60 in this embodiment is recessed and close to the static contact 50 .

Embodiment 3

[0024] Embodiment 3: In this embodiment, the difference from Embodiment 1 is that the static contact bridge is a one-shaped static contact bridge 40 with a cross-section and a U-shaped magnetic conductive part 60 is installed on each pole of the movable contact bridge 10, The U-shaped magnetic conductive part 60 is set on the side of the movable contact bridge 10 close to the movable contact 20, and the opening faces the static contact 50. The lower end surface of the U-shaped magnetic conductive part 60 is equal to or higher than the end surface of the static contact 50, and the U-shaped magnetic conductive sleeve 60 covers the part of the static contact 50 close to the width of the static contact 50. The U-shaped magnetic conductive sleeve 60 is not fixed on the movable contact bridge 10 but fixed on the inactive part of the electrical appliance. The cross section is a straight magnetic conductive plate 70 It is fixed on the upper surface of the inline static contact bridge 4...

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Abstract

The invention provides a method for intensifying arc gap arc-blowing magnetic flux to improve an electric appliance arc-extinguishing capability. The method involves a moving contact bridge and movingcontacts arranged on a lower surface of the moving contact bridge, a lower side of the moving contact bridge is provided with static contact bridges, static contacts arranged corresponding to the moving contacts are arranged on the static contact bridges, and the method is characterized in that each static contact bridge is provided with a magnetic conduction plate, and in the correspondingly arranged moving contacts and static contacts, magnetic conduction pieces whose sections are U-shaped and which have openings towards an arc gap sleeve peripheries of the moving contacts or static contacts. Compared with the prior art, the U-shaped magnetic conduction pieces intensify arc gap outward arc-blowing magnetic flux, and the magnetic conduction plates reduces arc gap inward arc-blowing magnetic flux, thereby increasing total outward arc-blowing magnetic flux, improving outward arc-blowing force, and the method has the characteristics of improving the electric appliance arc-extinguishingcapability, being simple in structure, being reliable, and being low in cost.

Description

technical field [0001] The invention relates to the field of electrical appliances, in particular to a method for strengthening arc gap blowing magnetic flux and improving the arc extinguishing capability of electrical appliances. Background technique [0002] Arcing is an inevitable phenomenon during the operation of electrical appliances. Arcing causes severe burnout of electrical contacts, which not only greatly reduces electrical life and operating reliability, but also may weld the contacts, causing serious accidents and affecting the normal operation of the entire system. In order to strengthen the arc extinguishing ability of electrical contacts, the electrical industry has conducted a lot of research, for example, arc extinguishing using grids, arc extinguishing with longitudinal slots, arc extinguishing with magnetic blowing in series, and so on. At present, all contactor products adopt the above-mentioned arc extinguishing measures and U-shaped static contact bridg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/44
CPCH01H9/44
Inventor 刘向军曹启纯
Owner FUZHOU UNIV