A linear Halbach array permanent magnet track

Abstract

The present invention relates to the field of rail transportation technology, and in particular, to a linear Halbach array permanent magnet track. The pair comprises: a stainless steel base, a first permanent magnet, a second permanent magnet and a third permanent magnet, wherein the first permanent magnets are all arranged above the stainless steel base, and the magnetization directions of each of the first permanent magnets are the same and are all in the horizontal direction; the second permanent magnets are all arranged between two adjacent first permanent magnets, and the magnetization direction of each of the second permanent magnets is set to a vertical direction, and the magnetization directions of the two adjacent second permanent magnets are opposite; the third permanent magnet is arranged between two adjacent second permanent magnets, and the magnetization direction of the third permanent magnet is in the horizontal direction. The present invention enhances the suspension force of the permanent magnet track by setting a single permanent magnet of the permanent magnet track to a specific height and width, and can also change the permanent magnet arrangement mode most suitable for the permanent magnet track by changing the cross-sectional area of ​​the permanent magnet.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to a linear Halbach array permanent magnet track. Background Art

[0002] Permanent magnet tracks are usually assembled with NdFeB permanent magnets and magnet yokes according to optimized magnetic circuit structures, and are the only external magnetic field input source for high-temperature superconducting pinned maglev. In the design of previous Halbach permanent magnet tracks, conventional thinking was used to design the track structure size to be symmetrical, and the size was not optimized from the contribution of the magnetic properties of each permanent magnet to the suspension system. That is, the geometric size of the existing Halbach permanent magnet track is not optimal, so that the suspension system cannot generate the maximum suspension force. Summary of the invention

[0003] The purpose of the present invention is to provide a linear Halbach array permanent magnet track to improve the above problems. In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0004] The present application provides a linear Halbach array permanent magnet track, comprising: a stainless steel base, a first permanent magnet, a second permanent magnet and a third permanent magnet, wherein at least two first permanent magnets are provided, each of the first permanent magnets is provided above the stainless steel base, and the magnetization direction of each of the first permanent magnets is the same and is in a horizontal direction; at least two second permanent magnets are provided, each of the second permanent magnets is provided between two adjacent first permanent magnets, the magnetization direction of each of the second permanent magnets is provided in a vertical direction, and the magnetization directions of two adjacent second permanent magnets are opposite; the third permanent magnet is provided between two adjacent second permanent magnets, the magnetization direction of the third permanent magnet is in a horizontal direction, and the magnetization direction of the third permanent magnet is opposite to that of the first permanent magnet; and the aspect ratio of the second permanent magnet is different from that of the first permanent magnet, and the aspect ratio of the second permanent magnet is different from that of the third permanent magnet.

[0005] Optionally, the height of the first permanent magnet is between 10 mm and 25 mm.

[0006] Optionally, the top surfaces of the first permanent magnet, the second permanent magnet and the third permanent magnet are located in the same horizontal plane.

[0007] Optionally, a first bump is provided on the upper surface of the stainless steel base, two first bumps are provided, the first permanent magnet is provided directly above the two first bumps, and the width of the two first bumps is respectively the same as the width of the two first permanent magnets.

[0008] Optionally, two grooves are provided between the two first bumps, the second permanent magnet is provided in each of the two grooves, the width of the grooves is the same as the width of the second permanent magnet, a second bump is also provided between the two grooves, the third permanent magnet is provided directly above the second bump, the width of the second bump is the same as the width of the third permanent magnet, and the height of the second bump is lower than the height of the first bump.

[0009] Optionally, a groove is provided on the stainless steel base, the groove is provided between two of the first protrusions, the second permanent magnet and the third permanent magnet are both provided in the groove, and the width of the groove is equal to the sum of the widths of the second permanent magnet and the third permanent magnet.

[0010] Optionally, the aspect ratio of the first permanent magnet is greater than 0.84 and less than or equal to 1.73.

[0011] Optionally, the aspect ratio of the second permanent magnet is greater than 0.64 and less than or equal to 1.16.

[0012] Optionally, the aspect ratio of the third permanent magnet is greater than 0.56 and less than or equal to 1.21.

[0013] Optionally, the cross-sectional area of ​​the first permanent magnet is referred to as the first cross-sectional area, the sum of the cross-sectional area of ​​the second permanent magnet and the cross-sectional area of ​​the third permanent magnet is referred to as the second cross-sectional area, the sum of the first cross-sectional area and the second cross-sectional area is referred to as the third cross-sectional area, the ratio of the first cross-sectional area to the second cross-sectional area is greater than 0.25 and less than or equal to 0.56, and the third cross-sectional area is 3000 square millimeters.

[0014] The beneficial effects of the present invention are:

[0015] The present invention enhances the suspension force of the permanent magnet track by setting a single permanent magnet of the permanent magnet track to a specific height and width, and can also change the permanent magnet arrangement mode most suitable for the permanent magnet track by changing the cross-sectional area of ​​the permanent magnet.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of the cross-sectional structure of a linear Halbach array permanent magnet track with two grooves described in an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of a linear Halbach array permanent magnet track with a groove described in an embodiment of the present invention;

[0020] Figure 3 for Figure 2 The linear Halbach array permanent magnet track and Figure 1 Schematic diagram of the vertical magnetic field comparison of the linear Halbach array permanent magnet track.

[0021] Markings in the figure: 1, stainless steel base; 2, first permanent magnet; 3, second permanent magnet; 4, third permanent magnet; 5, first bump; 6, second bump. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] Example 1

[0025] like Figure 1 and Figure 3 As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0026] The present invention enhances the suspension force of the permanent magnet track by setting a single permanent magnet of the permanent magnet track to different heights and widths, and can also change the permanent magnet arrangement mode most suitable for the permanent magnet track by changing the cross-sectional area of ​​the permanent magnet.

[0027] Example 2

[0028] like Figure 1 and Figure 3 As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0029] The height of the first permanent magnet 2 is between 10 mm and 25 mm.

[0030] The embodiment of the present invention changes the magnetic field strength above the track by changing the height of the first permanent magnet 2. When the height of the first permanent magnet 2 is between 10 mm and 25 mm, the permanent magnet track generates the strongest magnetic field and has the strongest suspension ability.

[0031] Example 3

[0032] like Figure 1 and Figure 3 As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0033] Note that the top surfaces of the first permanent magnet 2 , the second permanent magnet 3 and the third permanent magnet 4 are located in the same horizontal plane.

[0034] The present invention ensures that the vehicle runs normally above the permanent magnet track and that the center of the magnetic field is located at the same position by setting the surfaces of the plurality of permanent magnets as horizontal planes.

[0035] Example 4

[0036] like Figure 1 and Figure 3As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0037] The upper surface of the stainless steel base 1 is provided with a first protrusion 5 , and there are two first protrusions 5 . The first permanent magnets 2 are arranged directly above the two first protrusions 5 , and the widths of the two first protrusions 5 are respectively the same as the widths of the two first permanent magnets 2 .

[0038] The present invention provides a first convex block 5 to cooperate with the first permanent magnet 2, thereby ensuring that the magnetic field position of the first permanent magnet 2 remains unchanged, saving construction costs, and preventing the first permanent magnet 2 from moving left and right.

[0039] Example 5

[0040] like Figure 1 and Figure 3 As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0041] The upper surface of the stainless steel base 1 is provided with a first protrusion 5 , and there are two first protrusions 5 . The first permanent magnets 2 are arranged directly above the two first protrusions 5 , and the widths of the two first protrusions 5 are respectively the same as the widths of the two first permanent magnets 2 .

[0042] Two grooves are arranged between the two first bumps 5, and the second permanent magnet 3 is arranged in each of the two grooves, and the width of the grooves is the same as the width of the second permanent magnet 3. A second bump 6 is also arranged between the two grooves, and the third permanent magnet 4 is arranged directly above the second bump 6, and the width of the second bump 6 is the same as the width of the third permanent magnet 4. The height of the second bump 6 is lower than the height of the first bump 5.

[0043] The present invention fixes the second permanent magnet 3 by setting the width of the groove and the second protrusion 6, thereby ensuring the stability of the positive magnetic field position and increasing the magnetic field strength above the permanent magnetic track, thereby generating a greater magnetic buoyancy force and saving economic costs.

[0044] Example 6

[0045] like Figure 2 and Figure 3 As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0046] The upper surface of the stainless steel base 1 is provided with a first protrusion 5 , and there are two first protrusions 5 . The first permanent magnets 2 are arranged directly above the two first protrusions 5 , and the widths of the two first protrusions 5 are respectively the same as the widths of the two first permanent magnets 2 .

[0047] The stainless steel base 1 is provided with a groove, which is arranged between the two first protrusions 5 , and the second permanent magnet 3 and the third permanent magnet 4 are both arranged in the groove, and the width of the groove is equal to the sum of the widths of the second permanent magnet 3 and the third permanent magnet 4 .

[0048] The present invention fixes the second permanent magnet 3 and the third permanent magnet 4 by setting grooves, and determines the depth of the grooves according to the heights of the second permanent magnet 3 and the third permanent magnet 4, thereby saving costs and improving the magnetic flux of the permanent magnet track.

[0049] Example 7

[0050] like Figure 1 and Figure 3 As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0051] The aspect ratio of the first permanent magnet 2 is greater than 0.84 and less than or equal to 1.73.

[0052] The present invention changes the aspect ratio of the first permanent magnet 2 to affect the magnetic field distribution and magnetic field gradient near it, thereby enhancing the magnetic field strength above the permanent magnet track, and the suspension force of the permanent magnet track is greater. When the aspect ratio of the first permanent magnet 2 is greater than 0.84 and less than or equal to 1.73, the suspension performance of the permanent magnet track is the strongest.

[0053] Example 8

[0054] like Figure 1 and Figure 3As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0055] The aspect ratio of the second permanent magnet 3 is greater than 0.64 and less than or equal to 1.16.

[0056] The present invention affects the magnetic field distribution and magnetic field gradient near the second permanent magnet 3 by changing the aspect ratio of the second permanent magnet 3. When the aspect ratio of the second permanent magnet 3 is greater than 0.64 and less than or equal to 1.16, the magnetic field intensity above the permanent magnet track is the strongest, and the suspension performance of the permanent magnet track is the strongest. If the aspect ratio is less than 0.6, it is not conducive to the manufacture of permanent magnets and is a bit easy to break. The first permanent magnet 2 and the third permanent magnet 4 have different aspect ratios from the second permanent magnet 3.

[0057] Example 9

[0058] like Figure 1 and Figure 3As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0059] The aspect ratio of the third permanent magnet 4 is greater than 0.56 and less than or equal to 1.21.

[0060] The present invention affects the magnetic field distribution and magnetic field gradient near the three permanent magnets 4 by changing the aspect ratio of the three permanent magnets 4. When the aspect ratio of the third permanent magnet 4 is greater than 0.56 and less than or equal to 1.21, the magnetic field intensity above the permanent magnet track is the strongest, and the suspension performance is the strongest at this time.

[0061] Example 10

[0062] like Figure 1 and Figure 3 As shown, this embodiment provides a linear Halbach array permanent magnet track, including: a stainless steel base 1, a first permanent magnet 2, a second permanent magnet 3 and a third permanent magnet 4, wherein at least two first permanent magnets 2 are provided, each of which is provided above the stainless steel base 1, and the magnetization direction of each first permanent magnet 2 is the same and is in the horizontal direction; at least two second permanent magnets 3 are provided, each of which is provided between two adjacent first permanent magnets 2, and the magnetization direction of each second permanent magnet 3 is set to a vertical direction, and the magnetization directions of two adjacent second permanent magnets 3 are opposite; the third permanent magnet 4 is provided between two adjacent second permanent magnets 3, and the magnetization direction of the third permanent magnet 4 is in the horizontal direction, and the magnetization direction of the third permanent magnet 4 is opposite to that of the first permanent magnet 2; the aspect ratio of the second permanent magnet 3 is different from that of the first permanent magnet 2, and the aspect ratio of the second permanent magnet 3 is different from that of the third permanent magnet 4.

[0063] The cross-sectional area of ​​the first permanent magnet 2 is referred to as the first cross-sectional area, the sum of the cross-sectional area of ​​the second permanent magnet 3 and the cross-sectional area of ​​the third permanent magnet 4 is referred to as the second cross-sectional area, the sum of the first cross-sectional area and the second cross-sectional area is referred to as the third cross-sectional area, the ratio of the first cross-sectional area to the second cross-sectional area is greater than 0.25 and less than or equal to 0.56, and the third cross-sectional area is 3000 square millimeters.

[0064] The present invention fixes the total cross-sectional area of ​​the linear Halbach array permanent magnet track, reduces the cross-sectional area of ​​the first permanent magnet 2, and increases the second cross-sectional area, wherein the increased area of ​​the second cross-sectional area is equal to the cross-sectional area of ​​the first permanent magnet 2, thereby increasing the suspension force while maintaining the same material, saving costs, and improving the arrangement of the linear Halbach array permanent magnet track.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0066] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A linear Halbach array permanent magnet track, characterized in that: include: Stainless steel base (1); A first permanent magnet (2), wherein at least two first permanent magnets (2) are provided, each of the first permanent magnets (2) is provided above the stainless steel base (1), and each of the first permanent magnets (2) has the same magnetization direction, which is a horizontal direction; a second permanent magnet (3), wherein at least two second permanent magnets (3) are provided, each of the second permanent magnets (3) is provided between two adjacent first permanent magnets (2), the magnetization direction of each second permanent magnet (3) is provided in a vertical direction, and the magnetization directions of two adjacent second permanent magnets (3) are opposite; a third permanent magnet (4), the third permanent magnet (4) being arranged between two adjacent second permanent magnets (3), the magnetization direction of the third permanent magnet (4) being horizontal, and the magnetization direction of the third permanent magnet (4) being opposite to the magnetization direction of the first permanent magnet (2); The aspect ratio of the second permanent magnet (3) is different from the aspect ratio of the first permanent magnet (2), and the aspect ratio of the second permanent magnet (3) is different from the aspect ratio of the third permanent magnet (4); The upper surface of the stainless steel base (1) is provided with a first protrusion (5), two first protrusions (5) are provided, the first permanent magnets (2) are provided directly above the two first protrusions (5), and the widths of the two first protrusions (5) are respectively the same as the widths of the two first permanent magnets (2); The stainless steel base (1) is provided with a groove, the groove is provided between the two first protrusions (5), the second permanent magnet (3) and the third permanent magnet (4) are both provided in the groove, and the width of the groove is equal to the sum of the widths of the second permanent magnet (3) and the third permanent magnet (4); The cross-sectional area of ​​the first permanent magnet (2) is referred to as the first cross-sectional area, the sum of the cross-sectional area of ​​the second permanent magnet (3) and the cross-sectional area of ​​the third permanent magnet (4) is referred to as the second cross-sectional area, the sum of the first cross-sectional area and the second cross-sectional area is referred to as the third cross-sectional area, the ratio of the first cross-sectional area to the second cross-sectional area is greater than 0.25 and less than or equal to 0.56, and the third cross-sectional area is 3000 square millimeters.

2. The linear Halbach array permanent magnet track according to claim 1, characterized in that: The height of the first permanent magnet (2) is between 10 mm and 25 mm.

3. The linear Halbach array permanent magnet track according to claim 1, characterized in that: Note that the top surfaces of the first permanent magnet (2), the second permanent magnet (3) and the third permanent magnet (4) are located in the same horizontal plane.

4. The linear Halbach array permanent magnet track according to claim 1, characterized in that: Two grooves are arranged between the two first protrusions (5), the second permanent magnets (3) are arranged in the two grooves, the width of the grooves is the same as the width of the second permanent magnets (3), a second protrusion (6) is also arranged between the two grooves, the third permanent magnet (4) is arranged directly above the second protrusion (6), the width of the second protrusion (6) is the same as the width of the third permanent magnet (4), and the height of the second protrusion (6) is lower than the height of the first protrusion (5).

5. The linear Halbach array permanent magnet track according to claim 1, characterized in that: The aspect ratio of the first permanent magnet (2) is greater than 0.84 and less than or equal to 1.

73.

6. The linear Halbach array permanent magnet track according to claim 1, characterized in that: The aspect ratio of the second permanent magnet (3) is greater than 0.64 and less than or equal to 1.

16.

7. The linear Halbach array permanent magnet track according to claim 1, characterized in that: The aspect ratio of the third permanent magnet (4) is greater than 0.56 and less than or equal to 1.21.

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