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Contactor having low eddy-current loss

A technology of eddy current loss and contactor, which is applied in the field of electric power, can solve the problems of reducing the service life of contactors, noise, vibration, etc., and achieve the effects of reducing noise, reducing eddy current loss, and reducing eddy current loss

Inactive Publication Date: 2016-06-08
SICHUAN LANXUNBAOER ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the magnetic flux passes through zero, the suction force it produces is also zero, and the moving iron core (armature) tends to leave, but before leaving, the magnetic flux rises quickly, and the moving iron core is sucked back, resulting in vibration and noise , reduce the service life of the contactor, and generate eddy current loss

Method used

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  • Contactor having low eddy-current loss
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Examples

Experimental program
Comparison scheme
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Embodiment 1

[0019] Such as Figure 1-2 As shown, the present invention includes a moving contact 1, an inductive coil 2, a rotating rod 3, an iron core 4, a static contact 6, a mounting seat 7, a horizontal cross bar 8 and a bottom plate 10, the inductive coil 2, the mounting seat 7, and The horizontal cross-bars 8 are installed vertically on the bottom plate 10. The inductor 2 is located between the mounting base 7 and the horizontal cross-bar 8. An iron core 4 is also installed on the end surface of the inductor 2, and the iron core 4 is made of multiple silicon steel sheets 13 stacked and riveted. The end surface of the core 4 is equipped with a magnetic split ring 12, and a static contact 6 is installed on the mounting base 7; one end of the rotating rod 3 is fixedly installed with the movable contact 1, and the other end is movably connected to the horizontal cross rod 8. The armature 5 is also installed on the surface of the armature 5, and the armature 5 is opposite to the iron core...

Embodiment 2

[0023] The preferred specific structure of this embodiment on the basis of embodiment 1 is as follows: the iron core 4 is divided into two layers, the two layers are staggered, and each layer is vertically stacked and riveted together by multiple silicon steel sheets 13, and only the top layer is equipped with 磁环12. The two layers are staggered. The upper and lower magnetic fluxes can work better independently without affecting each other. The upper layer of the core can better realize the magnetic flux passing through the narrow section of the sheet, and the eddy current is limited to some of the sheets. Narrow loops flow through, and the net electromotive force in these loops is small, and the length of the loop is large. Because of the large resistivity of this sheet material, the eddy current loss can be significantly reduced.

Embodiment 3

[0025] This embodiment adds the following technical feature on the basis of the above-mentioned embodiment: a reaction spring 9 is also connected between the bottom of the rotating rod 3 and the bottom of the bottom plate 10. When the inductance coil is powered off, the iron core and the armature are separated. Due to the pull of the spring, the 360° rotation of the rotating rod is avoided, causing safety accidents and damaging the movable contact on the rotating rod and the movable connection between the rotating rod and the horizontal bar , Improve the service life. When the iron core and the armature need to be sucked together, the reaction spring can be compressed again without affecting its sucking, and the use is flexible and convenient.

[0026] The opposite ends of the movable contact 1 and the static contact 6 are both arc-shaped structures.

[0027] The angle range that the rotating rod 3 can rotate counterclockwise around the movable connection point on the horizontal c...

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Abstract

The invention discloses a contactor having low eddy-current loss. The contactor comprises a moving contact, an inductive coil, a rotating bar, an iron core, a fixed contact, a mounting base, a horizontal cross bar and a bottom plate, wherein the inductive coil, the mounting base and the horizontal cross bar are vertically arranged on the bottom plate, the inductive coil is arranged between the mounting base and the horizontal cross bar, the iron core formed by a plurality of silicon steel sheets by overlapping and riveting is also arranged on the end surface of the inductive coil, a shading coil is arranged on the end surface of the iron core, the fixed contact is also arranged on the mounting base, the moving contact is fixed at one end of the rotating bar, the horizontal cross bar is movably connected at the other end of the rotating bar, an armature is also arranged on the surface of the rotating bar, the armature faces the iron core, a wiring terminal is arranged under the rotating bar and on the mounting base, and the moving contact faces the fixed contact. According to the contactor, the structure is simple, two magnetic flows which have different time phases pass through the iron core by the shading coil due to the special iron core so that the total magnetic flow cannot exceed the zero, the noise is reduced, the eddy-current loss is reduced and the service life is prolonged.

Description

Technical field [0001] The present invention relates to the field of electric power, in particular, to a contactor with low eddy current loss. Background technique [0002] The contactor is mainly used to control the direct circuit, only to transmit the power, the size of the electrical appliance is related to the rated current of the electrical appliance. In the current contactor, when an alternating current is passed through the coil, the magnetic flux generated in the core changes at the same frequency as the current. When the current frequency is 50Hz, the magnetic flux passes through the zero point 100 times per second. When the magnetic flux passes through zero, the suction force it produces is also zero. The moving iron core (armature) has a tendency to leave, but before it leaves, the magnetic flux rises quickly and the moving iron core is sucked back again, resulting in vibration and noise , Reduce the service life of the contactor, and produce eddy current loss. The e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H50/36H01H50/18
CPCH01H50/36H01H50/18
Inventor 李胜峰
Owner SICHUAN LANXUNBAOER ELECTRONICS TECH
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