Permanent magnet arrangement method for enhancing magnetic field

Abstract

The invention discloses a permanent magnet arrangement method for enhancing a magnetic field. The method comprises the following steps: forming a plurality of groups of caulking grooves in a base body; a group of permanent magnets are respectively embedded in each group of caulking grooves, and the like poles of two adjacent groups of permanent magnets are opposite, so that magnetic field lines from like magnetic poles of each group of permanent magnets are diverged outwards to form a closed loop; the base body is sleeved with a limiting ring, and the limiting ring covers the multiple sets of caulking grooves and isolates and blocks the multiple sets of permanent magnets. By arranging a magnetic field in a mode that like poles of adjacent permanent magnets are opposite, magnetic field lines from like magnetic poles of each permanent magnet are diffused outwards to form a closed loop, a closed path of a magnetic circuit is increased, short circuit of the magnetic circuit is greatly reduced, the more compact the permanent magnets are, the better the permanent magnets are, and the torque under the condition of the same volume can be multiplied.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet drive, and specifically to a method for arranging permanent magnets to enhance the magnetic field. Background Art

[0002] Permanent magnet drive is a technology that uses magnetic force to achieve power transmission. It can avoid mechanical wear, extend the service life, and is suitable for vacuum, clean or high-risk environments. Through gearless meshing, it runs quietly and is suitable for precision instruments. Moreover, it automatically slips when the torque exceeds the limit to protect the equipment.

[0003] Permanent magnets are the key materials for permanent magnet eddy current drive equipment in permanent magnet drive equipment. Currently, when arranging the magnetic field, the N pole and S pole are generally arranged alternately in an attracting manner (see Figure 2 ) or in the form of a Halbach array (see Figure 3 ). Like an electric circuit, the magnetic wheel takes the shortest path. In the N pole and S pole alternating arrangement, in the part where the N pole is close to the S pole, partial magnetic circuit short - circuit is likely to occur. The short - circuited magnetic field part is an ineffective magnetic field and cannot be converted externally, resulting in limited torque generation. Therefore, if the N pole and S pole are too close, the closer they are, the more short - circuited magnetic fields are formed, and the generated torque will instead become smaller, and it is impossible to generate a larger torque with the same volume. The Halbach array arrangement turns most of the magnetic field to one side, and the other side forms a self - closed magnetic circuit, and there are also partial short - circuited magnetic fields, and it is also impossible to generate a larger torque with the same volume.

[0004] In order to solve the magnetic field short - circuit problem to a greater extent and generate a larger torque with the same volume, the present invention proposes a brand - new method for arranging permanent magnets. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for arranging permanent magnets to enhance the magnetic field, so as to solve the problems raised in the above - mentioned background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A method for arranging permanent magnets to enhance the magnetic field, including the following steps:

[0007] S1. Open multiple groups of embedded grooves on the base body;

[0008] S2. Respectively embed a group of permanent magnets in each group of embedded grooves. The adjacent two groups of permanent magnets have the same poles facing each other, so that the magnetic field lines starting from the same - sex magnetic poles of each permanent magnet diverge outward to form a closed loop;

[0009] S3. Sleeve a limiting ring on the base body. The limiting ring covers multiple groups of embedded grooves and forms an isolation barrier for multiple groups of permanent magnets.

[0010] As a preferred technical solution, multiple groups of embedded grooves are evenly distributed in a ring shape, and the repulsive forces received by the two - end magnetic poles of the permanent magnets cancel each other out.

[0011] As a preferred technical solution, the limiting ring is made of non-magnetic material.

[0012] As a preferred technical solution, each group of permanent magnets is composed of one or more permanent magnets.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] By arranging the magnetic field in such a way that adjacent permanent magnets have the same poles facing each other, the magnetic field lines starting from the same poles of each permanent magnet diverge outward to form a closed loop, increasing the path of magnetic circuit closure, greatly reducing magnetic circuit short-circuiting, and the closer the permanent magnets are arranged, the better. The torque can be doubled under the same volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the magnetic field distribution diagram of the permanent magnet arrangement of the present invention;

[0016] Figure 2 It is the magnetic field distribution diagram of the permanent magnets arranged in an alternating pattern of N poles and S poles of the present invention;

[0017] Figure 3 It is the magnetic field distribution diagram of the permanent magnets arranged in a Halbach array of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-3

[0020] Embodiment 1

[0021] A method for arranging permanent magnets to enhance the magnetic field is provided, including the following steps:

[0022] S1. A plurality of sets of embedded grooves are formed on the substrate, and the plurality of sets of embedded grooves are evenly distributed in a ring shape;

[0023] S2. A set of permanent magnets is respectively embedded in each set of embedded grooves. The shape of the permanent magnets is a cuboid, a tile shape, etc. The shape of the embedded grooves is adapted to the shape of the permanent magnets. Each group of permanent magnets is composed of one or more permanent magnets;

[0024] Adjacent sets of permanent magnets have the same poles facing each other, so that the magnetic field lines starting from the same poles of each permanent magnet diverge outward to form a closed loop, and the repulsive forces received by the two poles of the permanent magnets cancel each other out;

[0025] S3. Sleeve a limiting ring on the base body. The limiting ring covers multiple groups of embedded grooves and forms an isolation barrier for multiple groups of permanent magnets. The limiting ring is made of non-magnetic materials, and the non-magnetic materials are such as titanium alloy, non-magnetic stainless steel and other materials.

[0026] Embodiment 2

[0027] Provide a method for arranging permanent magnets to enhance the magnetic field, including the following steps:

[0028] S1. Open multiple groups of embedded grooves on the base body, and the multiple groups of embedded grooves are evenly distributed in a ring shape;

[0029] S2. Respectively embed and place a group of permanent magnets in each group of embedded grooves. The shape of the permanent magnet is a cuboid, a tile shape or other shapes. The shape of the embedded groove is adapted to the shape of the permanent magnet. Each group of permanent magnets is composed of a single piece or multiple pieces of permanent magnets;

[0030] Two adjacent groups of permanent magnets have the same poles facing each other, so that the magnetic field lines starting from the same-sex poles of each permanent magnet diverge outward to form a closed loop, and the repulsive forces received by the two poles at both ends of the permanent magnet cancel each other out;

[0031] S3. Sleeve a limiting ring on the base body. The limiting ring covers multiple groups of embedded grooves and forms an isolation barrier for multiple groups of permanent magnets. The limiting ring is made of non-magnetic materials, and the non-magnetic materials are such as titanium alloy, non-magnetic stainless steel and other materials.

[0032] Embodiment 3

[0033] Provide a method for arranging permanent magnets to enhance the magnetic field, including the following steps:

[0034] S1. Open multiple groups of embedded grooves on the base body, and the multiple groups of embedded grooves are evenly distributed in a ring shape;

[0035] S2. Respectively embed and place a group of permanent magnets in each group of embedded grooves. The shape of the permanent magnet is a cuboid or a tile shape. The shape of the embedded groove is adapted to the shape of the permanent magnet. Each group of permanent magnets is composed of a single piece or multiple pieces of permanent magnets;

[0036] Two adjacent groups of permanent magnets have the same poles facing each other, so that the magnetic field lines starting from the same-sex poles of each permanent magnet diverge outward to form a closed loop, and the repulsive forces received by the two poles at both ends of the permanent magnet cancel each other out;

[0037] S3. Sleeve a limiting ring on the base body. The limiting ring covers multiple groups of embedded grooves and forms an isolation barrier for multiple groups of permanent magnets. The limiting ring is made of non-magnetic materials, and the non-magnetic materials are such as titanium alloy, non-magnetic stainless steel and other materials.

[0038] Specifically, this method for arranging permanent magnets has the following advantages compared with the existing arrangement of alternating N poles and S poles:

[0039] In the arrangement where N poles and S poles are alternately arranged, in the part where the N pole is close to the S pole, partial magnetic circuit short - circuit is likely to occur. The short - circuited magnetic field part is an ineffective magnetic field and cannot be converted externally, resulting in limited torque generation. Therefore, if the N pole and the S pole are too close, the closer they are, the more short - circuited magnetic fields are formed, and the generated torque will instead become smaller, and it is impossible to generate a greater torque with the same volume.

[0040] The Halbach array arrangement turns most of the magnetic fields to one side, and magnetic circuit self - closing is formed on the other side. There are also some short - circuited magnetic fields, and it is also impossible to generate a greater torque with the same volume.

[0041] However, this permanent magnet arrangement method arranges the magnetic fields in such a way that the like - poles of adjacent permanent magnets face each other. The magnetic field lines starting from the like - poles of each permanent magnet diverge outward to form a closed loop, increasing the path of magnetic circuit closure, greatly reducing magnetic circuit short - circuits, and the closer the permanent magnets are arranged, the better. It can double the torque under the same volume condition.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for arranging permanent magnets to enhance a magnetic field, characterized in that, It includes the following steps: S1. Open multiple groups of embedded grooves on the substrate; S2. Respectively embed and place a group of permanent magnets in each group of embedded grooves. The adjacent two groups of permanent magnets have the same poles facing each other, so that the magnetic field lines starting from the same-sex magnetic poles of each group of permanent magnets diverge outward to form a closed loop; S3. Sleeve a limiting ring on the substrate. The limiting ring covers multiple groups of embedded grooves and forms an isolation barrier for multiple groups of permanent magnets.

2. A method for arranging permanent magnets to enhance a magnetic field according to claim 1, characterized in that The multiple groups of embedded grooves are evenly distributed in a ring shape, and the repulsive forces received by the two ends of the permanent magnet are offset from each other.

3. A method for arranging permanent magnets to enhance a magnetic field according to claim 1, characterized in that, The limiting ring is made of non-magnetic material.

4. A method for arranging permanent magnets to enhance a magnetic field according to claim 1, wherein Each group of permanent magnets is composed of one or more permanent magnets.

Images