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Direct current contactor internally provided with non-polar arc extinguishing system

A DC contactor and arc-extinguishing technology, applied in relays, electromagnetic relays, electromagnetic relay details, etc., can solve the problems that arcs cannot be extinguished, products are damaged, and magnetic blowing arc-extinguishing products cannot be realized.

Pending Publication Date: 2020-05-01
天水二一三新能源电器有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnetic blowout is suitable for the working condition where the main circuit distinguishes the positive and negative poles. The positive and negative poles of the components in the main circuit must be connected one by one. Once the positive and negative poles are reversed, the arc blowing direction will change from blowing to both sides In order to blow the arc to the middle, the arc cannot be extinguished during the contact breaking process, resulting in product damage and line failure; and for non-polarity work (the main circuit does not distinguish between positive and negative poles), conventional magnetic blowing arc extinguishing The product cannot be realized

Method used

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  • Direct current contactor internally provided with non-polar arc extinguishing system
  • Direct current contactor internally provided with non-polar arc extinguishing system
  • Direct current contactor internally provided with non-polar arc extinguishing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 , figure 2 , image 3 or Figure 4 The DC contactor shown is a built-in non-polarity arc extinguishing system, which includes a contact bridge 2 sealed in a housing 12, a permanent magnet group 13, an arc extinguishing cover 14 and an electromagnetic drive mechanism. The top of the housing 12 is installed There are positive and negative two terminals 1, the contact bridge 2 is fixed on the top of the push rod 4 through the opening retaining ring 7, the permanent magnet group 13 includes four permanent magnets, and the four permanent magnets are placed perpendicular to the bottom plate of the DC contactor, evenly distributed On both sides of the contact bridge 2, the side walls of the permanent magnets are parallel to the side walls of the contact bridge 2; the magnetic poles on the upper end surfaces of two adjacent permanent magnets are different.

[0025] Such as image 3 As shown, when the DC contactor passes forward current, the electromagnetic...

Embodiment 2

[0028] Such as figure 1 , figure 2 , Figure 5 or Figure 6 The DC contactor shown is a built-in non-polarity arc extinguishing system, which includes a contact bridge 2 sealed in a housing 12, a permanent magnet group 13, an arc extinguishing cover 14 and an electromagnetic drive mechanism. The top of the housing 12 is installed There are two positive and negative terminal posts 1, and the contact bridge 2 is fixed on the top of the push rod 4 through the open retaining ring 7. The permanent magnet group 13 includes two permanent magnets, and the two permanent magnets are placed perpendicular to the bottom plate of the DC contactor. On both sides of the contact bridge 2, the side walls of the permanent magnets are parallel to the side walls of the contact bridge 2; the N poles of the two permanent magnets are upward.

[0029] Such as Figure 5 As shown, when the DC contactor passes forward current, the electromagnetic drive mechanism drives the push rod 4 to reciprocate ...

Embodiment 3

[0032] Such as figure 1 , figure 2 , Figure 7 or Figure 8 The DC contactor shown is a built-in non-polarity arc extinguishing system, which includes a contact bridge 2 sealed in a housing 12, a permanent magnet group 13, an arc extinguishing cover 14 and an electromagnetic drive mechanism. The top of the housing 12 is installed There are two positive and negative terminal posts 1, and the contact bridge 2 is fixed on the top of the push rod 4 through the open retaining ring 7. The permanent magnet group 13 includes two permanent magnets, and the two permanent magnets are placed perpendicular to the bottom plate of the DC contactor. On both sides of the contact bridge 2, the side walls of the permanent magnets are parallel to the side walls of the contact bridge 2; the S poles of the two permanent magnets are upward.

[0033] Such as Figure 7 As shown, when the DC contactor passes forward current, the electromagnetic drive mechanism drives the push rod 4 to reciprocate ...

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PUM

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Abstract

The invention discloses a direct-current contactor with a non-polar arc extinguishing system. The contactor comprises a contact bridge, a permanent magnet group, an arc extinguishing cover and an electromagnetic driving mechanism which are sealed in a shell, wherein a positive binding post and a negative binding post are installed at the top of the shell, the contact bridge is fixed to the top ofa push rod through a split washer, the permanent magnet group comprises a plurality of long-strip-shaped permanent magnets, the permanent magnets are located on two sides of the contact bridge, N poles or S poles of the permanent magnets face upwards, and side walls of the permanent magnets are parallel to a side wall of the contact bridge. When the current flows in the forward direction or the reverse direction, when the contact bridge and the binding posts are connected or disconnected, electric arcs generated instantaneously blow towards the right or towards the left or in parallel along the same direction at the same time, a phenomenon of opposite blowing of the electric arcs is avoided, so two-pole electric arcs are pulled open, non-polar arc extinguishing of a main loop is realized,the arc extinguishing effect is rapid and remarkable, and an application range of the direct-current contactor is greatly expanded.

Description

technical field [0001] The invention relates to the technical field of medium and high voltage electrical equipment, in particular to a DC contactor with a built-in non-polar arc extinguishing system. Background technique [0002] DC contactors usually use two arc extinguishing methods, one is inert gas arc extinguishing, and the other is magnetic blowing arc extinguishing. Magnetic blowout is suitable for the working condition where the main circuit distinguishes the positive and negative poles. The positive and negative poles of the components in the main circuit must be connected one by one. Once the positive and negative poles are reversed, the arc blowing direction will change from blowing to both sides In order to blow the arc to the middle, the arc cannot be extinguished during the contact breaking process, resulting in product damage and line failure; and for non-polarity work (the main circuit does not distinguish between positive and negative poles), conventional m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H50/16H01H9/44
CPCH01H9/443H01H50/16
Inventor 贺小良汪彤赵振刚孙静王玮
Owner 天水二一三新能源电器有限公司