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Halbach permanent magnet array structure capable of reducing magnetic flux leakage and application of structure

A permanent magnetic array and magnetic flux leakage technology, applied in the field of Halbach permanent magnetic array structure, can solve problems such as magnetic flux leakage and poor structural strength, and achieve the effects of reducing magnetic flux leakage, increasing strength, and enhancing magnetic induction intensity

Active Publication Date: 2021-02-05
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a Halbach permanent magnetic array structure that reduces magnetic flux leakage, which solves the problems of poor structural strength and serious magnetic flux leakage in the actual industrial application of the existing Halbach permanent magnetic array structure

Method used

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  • Halbach permanent magnet array structure capable of reducing magnetic flux leakage and application of structure
  • Halbach permanent magnet array structure capable of reducing magnetic flux leakage and application of structure
  • Halbach permanent magnet array structure capable of reducing magnetic flux leakage and application of structure

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Embodiment 1

[0058] Such as figure 1 with figure 2 As shown, the present invention provides a Halbach permanent magnet array structure that reduces magnetic flux leakage, including a Halbach permanent magnet array body 1 , a carbon fiber protective sheath 2 and an Fe-based soft magnetic composite material 3 . The Halbach permanent magnet array body 1 is composed of four rectangular parallelepiped radial magnetization permanent magnets 4 and five rectangular parallelepiped tangential magnetization permanent magnets 5 alternately arranged and combined; the Halbach permanent magnet array body 1 is a cuboid; the Halbach permanent magnet array body 1 The surface is composed of an upper surface, a lower surface, a left surface, a right surface, a front surface and a rear surface; the radial magnetization permanent magnet 4 and the tangential magnetization permanent magnet 5 are NdFeB permanent magnet materials.

[0059] The Fe-based soft magnetic composite material 3 is arranged on the body 1 ...

Embodiment 2

[0064] The invention provides a Halbach permanent magnet array structure for reducing flux leakage, which includes a Halbach permanent magnet array body 1 , a carbon fiber protective cover 2 and Fe-based soft magnetic composite material 3 . The Halbach permanent magnet array body 1 is composed of four annular radially magnetized permanent magnets 4 and five annular tangentially magnetized permanent magnets 5 alternately arranged and combined; the Halbach permanent magnet array body 1 is cylindrical, such as Figure 8 Shown; Radial magnetization permanent magnet 4 and tangential magnetization permanent magnet 5 are NdFeB permanent magnet materials. The surface of the cylindrical Halbach permanent magnet array body 1 is composed of an outer peripheral surface, an inner peripheral surface, a left annular side and a right annular side.

[0065] In this embodiment, there are two kinds of Halbach permanent magnet array structures, which are the first cylindrical Halbach permanent ma...

Embodiment 3

[0074] The invention provides a Halbach permanent magnet array structure for reducing flux leakage, which includes a Halbach permanent magnet array body 1 , a carbon fiber protective cover 2 and Fe-based soft magnetic composite material 3 . The Halbach permanent magnet array body 1 is composed of 8 sectors radially magnetized permanent magnets 4 and 8 sectors tangentially magnetized permanent magnets 5 alternately arranged and combined; the Halbach permanent magnet array body 1 is in the shape of a ring, such as Figure 20 Shown; Radial magnetization permanent magnet 4 and tangential magnetization permanent magnet 5 are NdFeB permanent magnet materials. The surface of the annular Halbach permanent magnet array body 1 is composed of an upper annular surface, a lower annular surface, an outer peripheral surface and an inner peripheral surface.

[0075] In this embodiment, there are two kinds of Halbach permanent magnet array structures, which are the first annular Halbach perman...

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Abstract

The invention provides a Halbach permanent magnet array structure capable of reducing magnetic flux leakage. The Halbach permanent magnet array structure comprises a Halbach permanent magnet array body, a carbon fiber protective sleeve and a Fe-based soft magnetic composite material, wherein the Halbach permanent magnet array body is formed by alternately arranging and combining a plurality of radial magnetizing permanent magnets and a plurality of tangential magnetizing permanent magnets; the outer surface of the Halbach permanent magnet array body is composed of a magnetism gathering surfaceand a plurality of magnetism shielding surfaces; the magnetism gathering surface is coated with a carbon fiber protective sleeve; and the magnetic shielding surfaces are coated with a carbon fiber protective sleeve, and the Fe-based soft magnetic composite material is fixed on the carbon fiber protective sleeve. The carbon fiber protective sleeve and the Fe-based soft magnetic composite materialare adopted for coating, so that magnetic flux leakage is greatly reduced, and even magnetic flux leakage can be completely eliminated. Due to the arrangement of the Fe-based soft magnetic composite material, the magnetic induction intensity at the air gap area can be enhanced. The Halbach permanent magnet array structure can be applied to a radial permanent magnet bearing and a disc type corelessbilateral permanent magnet motor.

Description

technical field [0001] The invention relates to the technical field of propulsion and drive of power equipment, in particular to a Halbach permanent magnet array structure for reducing magnetic flux leakage and its application. Background technique [0002] The Halbach permanent magnet array is composed of radially magnetized and tangentially magnetized permanent magnets alternately arranged to form an array with continuous and uniform changes in the magnetization direction. By arranging the permanent magnets with different magnetization directions according to a certain rule, the magnetic force lines can be gathered on one side of the magnet, and the magnetic force lines can be weakened on the other side, so that the magnetic field energy of the permanent magnet can be concentrated in the required air gap to the maximum. Because the Halbach array has the above significant advantages, it has a good application prospect in radial permanent magnet bearings, disk permanent magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27
CPCH02K1/278H02K1/2793
Inventor 肖玲胡见涛贺西武
Owner XIAN UNIV OF SCI & TECH
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