Magnetic holding electromagnetic switch element capable of resisting outside magnetic interference

Abstract

The invention discloses a magnetic holding electromagnetic switch element capable of resisting outside magnetic interference. The magnetic holding electromagnetic switch element capable of resisting the outside magnetic interference comprises an electromagnetic coil (1). An armature iron (2) is inserted into the middle hole of the electromagnetic coil (1). An insulation transmission rod (3) is connected onto the armature iron (2) and matched with the switch element. A permanent magnet (4) is installed on the electromagnetic coil (1), and the magnetic pole of one end of the permanent magnet (4) is directed to the cylindrical surface of the armature iron (2). Yoke irons (5) are arranged on the side portion and the outer portion of the electromagnetic coil (1) which is provided with the permanent magnet (4) in a sleeved mode. The magnetic pole of the other end of the permanent magnet (4) contacts the yoke irons (5). Duo to the special action process of the magnetic holding electromagnetic switch element, requirements of resisting the outside magnetic interference in allusion to an electric system, especially in allusion to an intelligent electric meter are well met. Due to the fact that the yoke irons (5), the armature iron (2) and the permanent magnet (4) are combined to form a closed loop circuit structure, ability of resisting the outside magnetic interference is improved. Due to the fact that magnetic circuit air gap is controlled, and all the components are distributed scientifically and reasonably, drive efficiency of the electromagnetic coil (1) and the ability of resisting the outside magnetic interference of the external strong permanent magnet (4) are improved.

Description

technical field [0001] The invention relates to an anti-external magnetic interference magnetic holding electromagnetic switch element, which belongs to the technical field of electromagnetic switch equipment. Background technique [0002] The existing magnetic latching electromagnetic switch elements have the following deficiencies during use: [0003] 1. The existing magnetic latching electromagnetic switch element adopts an open double bridge structure, which is easily affected by external magnetic force and hinders the magnetic potential in the air gap of the double bridge, causing the armature to not move after the coil is excited; [0004] 2. In order to meet the minimum driving stroke of the double-bridge design, the double-bridge design requires a larger air gap, the magnetic flux loss is large, and the coil drive efficiency is low. When the permanent magnet interference is strengthened externally, this phenomenon is more obvious, and even directly leads to No actio...

AI Technical Summary

Problems solved by technology

[0003] 1. The existing magnetic latching electromagnetic switch element adopts an open double bridge structure, which is easily affected by external magnetic force and hinders the magnetic potential in the air gap of the double bridge, causing the armature to not move after the coil is excited;

[0004] 2. In order to meet the minimum driving stroke of the double-bridge design, the double-bridge design requires a larger air gap, the magnetic flux loss is large, and the coil drive efficiency is low. When the permanent magnet interference is strengthened externally, this phenomenon is more obvious, and even directly leads to No action; this kind of relay or switch composed of magnetic holding electromagnetic switching elements is used in the electric meter of the power system. Some people will use this phenomenon to steal electricity, and this phenomenon is often released;

[0005] 3. In the design of the existing magnetic holding electromagnetic switch element, the assembly of the movable armature part is very complicated, and it needs to be formed by injection molding of the insert, which may easily cause the deviation of the size of the armature part in different mold cavities

In actual assembly, due to the different assembly references of the movable and non-movable parts of the magnetic circuit, the armature cannot be completely closed, which reduces the magnetic holding force of the product

[0006] 4. The existing process conditions cannot meet the dimensional accuracy requirements of permanent magnet parts and other parts, and can only be solved by matching different mold cavities and replacing parts, resulting in poor production consistency, high labor costs, and extremely high parts precision requirements

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