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Halbach Permanent Magnet Array Structure and Its Application to Reduce Flux Leakage

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

Active Publication Date: 2021-09-28
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 and Its Application to Reduce Flux Leakage
  • Halbach Permanent Magnet Array Structure and Its Application to Reduce Flux Leakage
  • Halbach Permanent Magnet Array Structure and Its Application to Reduce Flux Leakage

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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 present invention provides a kind of Halbach permanent magnet array structure that reduces flux leakage, comprising Halbach permanent magnet array body, carbon fiber protective sleeve and Fe-based soft magnetic composite material; Halbach permanent magnet array body is composed of multiple radially magnetized permanent magnets and multiple Tangentially charged permanent magnets are alternately arranged and combined; the outer surface of the Halbach permanent magnet array body is composed of a magnetic collecting surface and multiple magnetic shielding surfaces; the magnetic collecting surface is covered with a carbon fiber protective sleeve; the magnetic shielding surface is covered with There is a carbon fiber protective cover, and the Fe-based soft magnetic composite material is fixed on the carbon fiber protective cover. The invention adopts the carbon fiber protective sheath and the Fe-based soft magnetic composite material to cover, which greatly reduces the magnetic flux leakage, and can even completely eliminate the magnetic flux leakage. The arrangement of the Fe-based soft magnetic composite material can enhance the magnetic induction intensity at the air gap region. The Halbach permanent magnet array structure of the present invention can be applied in radial permanent magnet bearings and disc type iron-coreless bilateral permanent magnet motors.

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 Patents(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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