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Open type permanent magnet device

A permanent magnet device and open-type technology, applied in the direction of permanent magnets, magnets, magnetic objects, etc., can solve problems such as difficult to adjust, difficult to adjust, easy to exceed the uniformity, etc., to achieve the effect of improving uniformity and magnetic field uniformity

Inactive Publication Date: 2018-02-23
BEIJING ZHONG KE SAN HUAN HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With this structure, at a constant temperature, the residual magnetism of the finished permanent magnet is fixed, and the field strength of the dipole magnetic field 50 formed after assembly is also fixed, so it is difficult to adjust it without affecting the field strength of the working area.
The entire assembly is affected by the assembly accuracy, the surface roughness of the magnetic pole head 10, the uniformity of the material of the magnetic pole head 10, and the consistency of the magnetic properties of the magnets on both sides. Easy to exceed the standard and difficult to adjust

Method used

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  • Open type permanent magnet device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In Embodiment 1 of the present invention, as Image 6 As shown, the permanent magnet device includes an upper magnetic pole head 101 , a lower magnetic pole head 102 , a permanent magnet 20 , a short circuit 601 , a temperature compensation plate 602 , a support beam 70 and a field modulation plate 80 . A dipole magnetic field 50 is formed between the upper magnetically conductive pole head 101 and the lower magnetically conductive pole head 102 . The permanent magnet device is a C-shaped structure that is symmetrical up and down. The upper magnetic pole head 101, the lower magnetic pole head 102 and a plurality of permanent magnets 20 are the main body (a plurality of permanent magnets 20 are embedded in the main magnetic circuit, and the upper magnetic pole head 101 Separated from the lower magnetic pole head 102, the magnetic poles of the plurality of permanent magnets 20 are in the same direction in the main magnetic circuit). The support beams 70 are respectively ...

Embodiment 2

[0059] In the second embodiment of the present invention, as Image 6 As shown, the upper magnetically conductive pole head 101 is designed into two parts, which are fastened and connected by fastening screws 103, and the adjusting screw 104 is used to fine-tune the upper magnetically conductive pole head 101, so that at the C-shaped opening of the permanent magnet device, the upper magnetically conductive pole The opposite end surfaces of the head 101 and the lower magnetically conductive pole head 102 are kept as horizontal as possible, which reduces the influence of the manufacturing and assembly errors of each component on the uniformity of the magnetic field, and makes the magnetic field uniformity in the working area of ​​the permanent magnet device better.

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Abstract

The invention relates to an open type permanent magnet device. The permanent magnet device has a C-shaped cross section and comprises a magnetic conductive pole head, a permanent magnet and field intensity adjusting pieces; the magnetic conductive pole head is made from a soft magnetic conductive material and comprises an upper magnetic conductive pole head and a lower magnetic conductive pole head; the permanent magnet is fixed between the upper magnetic conductive pole head and the lower magnetic conductive pole head, respectively comes into contact with the upper magnetic conductive pole head and the lower magnetic conductive pole head, and separates the upper magnetic conductive pole head from the lower magnetic conductive pole head; the field intensity adjusting pieces made from a magnetic conductive material are arranged around the permanent magnet and are respectively connected to the upper magnetic conductive pole head and the lower magnetic conductive pole head; the upper magnetic conductive pole head, the permanent magnet and the lower magnetic conductive pole head form a primary magnetic path; and the field intensity adjusting pieces, the upper magnetic conductive pole head, the permanent magnet and the lower magnetic conductive pole head form an adjusting magnetic path. According to the invention, the field intensity adjusting pieces are used to adjust the magneticflux passing through the adjusting magnetic path to finally adjust the magnetic flux of the primary magnetic path, thus adjusting the field intensity at a working air gap field.

Description

technical field [0001] The present invention generally relates to the technical field of permanent magnets, in particular to an open-type permanent magnet device. Background technique [0002] In magnet applications, it is necessary to generate high magnetic field strength, good uniformity, and to be able to resist the influence of ambient temperature on the magnetic field strength. Therefore, it is very important to design magnetic circuits for such requirements. For example, in the design of a synchrotron radiation source, a dipole magnetic field component is required as the core component. It is required that the magnetic field strength and uniformity of the charged particle passing area should be as high as possible, and the stronger the ability to resist the influence of ambient temperature, the better. "Magnets for the ESRF Diffraction-Limited LightSource Project" mentioned a gradient secondary permanent magnet structure for synchrotron radiation sources, such as figu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F7/02
CPCH01F7/021H01F7/0221H01F7/0226H01F7/0284
Inventor 何叶青王进东史学伟刘贵川王湛饶晓雷胡伯平陈福三李青
Owner BEIJING ZHONG KE SAN HUAN HI TECH