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Magnetic circuit switch

A magnetic circuit and switch technology, applied in the field of magnetic circuit switches, can solve the problems of large residual magnetism in the working area, limited use range, and difficulty in mastering the balance point.

Inactive Publication Date: 2004-05-26
JIANGSU MAGNET VALLEY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, rare earth permanent magnet materials are more and more widely used in various equipment and occasions that use permanent magnetic fields, but in permanent magnetic equipment, the problem of closing the permanent magnetic field has not been well resolved. The permanent magnetic field is balanced by a reverse magnetic field, but there are the following defects: 1. The balance point is difficult to grasp, and the magnetic flux leakage often causes the phenomenon of large residual magnetism in the working area (that is, incomplete closure); 2. . Since the magnetic circuit gap cannot be designed to be large, the magnetic field depth in the working area provided is not deep enough, and only has a strong surface magnetic field strength, which limits its scope of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment one: if figure 1 , figure 2 As shown, there are two magnetic shafts 2 that can rotate along their own axes in the housing 1, and a rotating magnet of permanent magnetic material that can rotate with the magnetic shaft is fixed in the interlayer 3 in the middle of each magnetic shaft. 4. There is an iron core 5 between the two magnetic conduction shafts, and a top magnet 6 of permanent magnetic material is placed above the iron core. Both the iron core 5 and the top magnet 6 are fixed with the housing 1 as a whole. When the magnetic circuit is in When in the open state, the interlayer 3 in the magnetic shaft is in the vertical direction, and the width H of the interlayer is the magnetic circuit gap. At this time, the magnetic field directions of the two rotating magnets 4 and one top magnet 6 around the iron core 5 are all facing the iron core. .

Embodiment 2

[0013] Embodiment two: if image 3 As shown, the difference from the first embodiment is that there are three magnetic shafts 2 with rotating magnets 4 in the housing 1, and there are two iron cores 5 and two top magnets 6 between the magnetic shafts. When the magnetic circuit is in the open state, the magnetic field directions of the two rotating magnets 4 and one top magnet 6 around each iron core 5 are facing or opposite to the iron core, so that two working areas A can be formed.

Embodiment 3

[0014] Embodiment three: as Figure 4 As shown, on the basis of Embodiment 1, a side magnet 7 is respectively fixed on both sides of the iron core 5 above the two magnetically conductive shafts 2, and the direction of the magnetic field of the side magnet is related to the rotation below it when the magnetic circuit is opened. The magnetic fields of the magnets are in the same direction.

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PUM

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Abstract

The invention relates to magnetic circuit switch for opening and closing source of magnetic field in permanent magnetism device. The switch includes a case made from magnetizer. There are at least two rotatable magnetic axes in the case. Axes are palalled each other and at same height. Rotation magnet is fixed in interlayer at middle part of each magnetic axis. There is an iron core between each two magnetic axes. Top magnet made from permanent magnetic material is installed above each iron core. When magnetic path is in open state, the interlayer is in vertical direction, and the width of the interlayer is gap of magnetic path. At this point, magnetic field directions of two rotation magnets and top magnet are all with same direction of the iron core, or all with opposite direction of the iron core. The invention features compact structure, easy to obtain stronger magnetic field and shutting down magnetic field drastically.

Description

technical field [0001] The invention relates to a magnetic circuit switch for switching on and off a magnetic field source in a permanent magnet device. Background technique [0002] At present, rare earth permanent magnet materials are more and more widely used in various equipment and occasions that use permanent magnetic fields, but in permanent magnetic equipment, the problem of closing the permanent magnetic field has not been well solved. The permanent magnetic field is balanced with a reverse magnetic field, but there are the following defects: 1. The balance point is difficult to grasp, and the magnetic flux leakage often causes the phenomenon of large residual magnetism in the working area (that is, incomplete closure); 2. 2. Since the magnetic circuit gap cannot be designed to be large, the magnetic field depth in the working area provided is not deep enough, and only has a strong surface magnetic field strength, which limits its application range. Contents of th...

Claims

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Application Information

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IPC IPC(8): H01F7/02H01F7/04
Inventor 徐俊峰
Owner JIANGSU MAGNET VALLEY TECH