Halbach array assembly method for rotor for motor, and the rotor for motor

Abstract

To provide a Halbach array assembly method for a rotor for a motor that can achieve automation of assembly and reduction of steps without interference of a magnetic force, and the rotor for a motor.SOLUTION: A Halbach array assembly method for a rotor for a motor according to the present invention includes: a first step of assembling, at a constant interval, a plurality of pre-magnetized magnets 121 having a magnetization direction in the tangential direction of a cylindrical rotating body; a second step of assembling unmagnetized magnets that are not magnetized between the plurality of pre-magnetized magnets assembled in the rotating body, thereby creating a rotor; and a third step of, after fixing a magnetization yoke to the pre-magnetized magnets and the unmagnetized magnets assembled into the rotor, generating a magnetic field to subject the unmagnetized magnets to post-magnetization, thereby realizing a circular Halbach array.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a Halbach array assembling method for a rotor for a motor and a rotor for the motor, and more particularly, to a Halbach array assembling method for a rotor for a motor using pre-magnetized magnets preferentially assembled along the tangential direction of a rotor, and a rotor for the motor. [Background technology]

[0002] In general, a driving motor for an electric vehicle (EVx) includes a stator that receives electric energy from a battery and generates a rotating magnetic field, and a rotor that rotates by the rotating magnetic field generated by the stator. Among them, the rotor receives power and converts the rotating magnetic field generated by the stator into driving energy, and has a structure in which multiple magnets are arranged around a cylindrical rotor (rotor hub). At this time, the multiple magnets can be assembled in a circular Halbach array shape to amplify the magnetic field in the direction of the stator.

[0003] Although the Halbach array method has the advantage of strengthening the magnetic field of the magnet, it has the disadvantage that assembly is difficult due to the multiplying force that pushes the magnetized magnets against each other when assembling them to the rotor. As a result, in the past, magnetized magnets were assembled to the rotor one by one by manual bonding, but since they were bonded individually, it took a long time for the bond to harden. In addition, there was also the problem that the magnets flowed due to the multiplying force until the bond hardened, making it difficult to optimize the magnetic direction. In particular, the manufacture of the rotor for the drive motor requires magnetization of multi-pole magnets with approximately 12 to 56 poles or more and a number of manual processes, and since automation is not possible, there is a problem of reduced productivity.

[0004] Meanwhile, another conventional technique is to assemble an unmagnetized magnet to a rotor and then apply an external magnetic field to magnetize it. However, this method is not applicable to industries such as drive motors due to the problem that the magnetization degree drops in the parts where the magnetic field and the magnet position do not match (for example, the tangential direction of the rotor) after assembly and the magnet magnetization rate is lower than the method of assembling magnetized magnets (see Figure 7(A)). In addition, the method of magnetizing after assembling unmagnetized magnets is limited to 6 to 8 poles for the number of magnetized magnets, and is not suitable for manufacturing multi-pole rotors.

[0005] The matters described in this background art section are created to enhance understanding of the background of the invention, and may include matters that are not prior art already known to those having ordinary skill in the art to which this technology pertains. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2007-215292 A Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a Halbach array assembly method for a rotor for a motor, which can automate the assembly of a circular Halbach array and shorten the process time without interference from magnetic forces by prioritizing the assembly of pre-magnetized magnets in the tangential direction of a rotor, and magnetizing them after assembling non-magnetized magnets, and to provide a rotor for the motor. [Means for solving the problem]

[0008] The Halbach array assembling method for a rotor for a motor according to the present invention includes a first step of assembling a plurality of pre-magnetized magnets having a magnetization direction in a tangential direction of a cylindrical rotating body at regular intervals, a second step of assembling unmagnetized magnets between the plurality of pre-magnetized magnets assembled on the rotating body to generate a rotor, and a third step of fixing a magnetizing yoke to the pre-magnetized magnets and unmagnetized magnets assembled on the rotor, and then generating a magnetic field to post-magnetize the unmagnetized magnets, thereby realizing a circular Halbach array.

[0009] The first step may include a step of applying a bond to one surface of the pre-magnetized magnet, and then seating the pre-magnet at the assembly position by a robot and curing the bond.

[0010] In addition, the pre-magnetized magnets are magnetized in the same magnetization direction, and then the magnetization direction is changed by a single robot and assembled alternately in a clockwise and counterclockwise direction.

[0011] The second step may include applying a bond to one surface of the unmagnetized magnet and assembling the magnets simultaneously using a robot without waiting for the bond to harden.

[0012] In addition, the third step may include a step of fixing a plurality of air-core coils arranged in a protruding form along the inner surface of the cylindrical body of the magnetizing yoke in correct positions corresponding to the unmagnetized magnets, and magnetizing them along the magnetic field direction.

[0013] In addition, the rotor may be assembled in a circular Halbach array structure divided into four, six, or eight parts depending on the number of poles and divisions of the post-magnetized magnet.

[0014] In addition, the four-divided circular Halbach array may include a fifth post-magnetized magnet in which a fifth magnetic field (↑) rising vertically outward is formed between two pre-magnetized magnets having clockwise and counterclockwise magnetic fields (→←), and a sixth post-magnetized magnet in which a sixth magnetic field (↓) falling vertically inward is formed between two pre-magnetized magnets having counterclockwise and clockwise magnetic fields (←→).

[0015] In addition, the six-divided circular Halbach array may include a first post-magnetized magnet in which a first magnetic field (upper right arrow) rising on a clockwise outer diagonal is formed between two pre-magnetized magnets having clockwise and counterclockwise magnetic fields (→←), a second post-magnetized magnet in which a second magnetic field (upper left arrow) rising on a counterclockwise outer diagonal is formed, a third post-magnetized magnet in which a third magnetic field (lower left arrow) falling on a counterclockwise inner diagonal is formed between two pre-magnetized magnets having counterclockwise and clockwise magnetic fields (←→), and a fourth post-magnetized magnet in which a fourth magnetic field (lower right arrow) falling on a clockwise inner diagonal is formed.

[0016] In addition, the 8-divided circular Halbach array may further form a sixth post-magnetized magnet with a sixth magnetic field (↓) descending vertically inward between the third post-magnetized magnet with the third magnetic field (arrow pointing downwards to the left) formed therein and the fourth post-magnetized magnet with the fourth magnetic field (arrow pointing downwards to the right) formed therein in the 6-divided Halbach array, and may further form a fifth post-magnetized magnet with a fifth magnetic field (↑) ascending vertically outward between the first post-magnetized magnet with the first magnetic field (arrow pointing upwards to the right) formed therein and the second post-magnetized magnet with the second magnetic field (arrow pointing upwards to the left) formed therein.

[0017] In addition, the rotor may be manufactured as at least one of an inner rotor in which a plurality of magnets are assembled in a Halbach array on the outer peripheral surface of the rotating body, an outer rotor in which a plurality of magnets are assembled in a Halbach array on the inner peripheral surface of the rotating body, and an axial flux rotor.

[0018] Meanwhile, a motor rotor according to an embodiment of the present invention is characterized in that it is manufactured by the Halbach array assembling method for a motor rotor described in any one of the above paragraphs. Effect of the Invention

[0019] According to the embodiment of the present invention, the pre-magnetized magnets are first assembled in the tangential direction of the rotor, and the non-magnetized magnets are assembled and then magnetized to realize a circular Halbach array, which has the effect of automating magnet assembly without interference due to magnetic force / magnetization.

[0020] In addition, by automating the circular Halbach array assembly of the rotor and simplifying the magnetization direction assembly of the pre-magnetized magnets, it is possible to reduce the time, labor costs, and equipment costs involved in manual assembly.

[0021] In addition, the pre-magnetized magnets, whose magnetization direction is formed along the tangent of the rotor, are assembled first, thereby ensuring the magnetic susceptibility of the parts where the magnetic field and the magnet position do not match when magnetized, and improving the magnetic susceptibility through magnetic field boosting when magnetizing the unmagnetized magnets. [Brief description of the drawings]

[0022] [Figure 1] 1 shows a Halbach array applied to a rotor for a motor according to an embodiment of the present invention. [Diagram 2] 1 shows a state in which pre-magnetization is assembled to a rotating body according to an embodiment of the present invention. [Diagram 3] 1 shows a pre-magnetized magnet assembled in the tangential direction of a rotor according to an embodiment of the present invention. [Figure 4] The figure shows a part of the assembly in which non-magnetized magnets are placed between pre-magnetized magnets. [Diagram 5] A method for forming a Halbach array magnetism in a rotor using a magnetizing yoke according to an embodiment of the present invention will be described. [Figure 6] 4 shows the direction of a magnetic field generated in a yoke during magnetization according to an embodiment of the present invention, and the magnetization direction of a magnet magnetized thereby. [Figure 7] The magnetization strength of a magnet that is magnetized without pre-magnetization in the conventional art is compared with the magnetization strength of a magnet that is magnetized after assembling a pre-magnetized magnet in the tangential direction according to an embodiment of the present invention. [Figure 8] 1 illustrates an example of a Halbach array of a rotor for a motor according to another embodiment of the present invention. [Figure 9] 1 illustrates an example of a Halbach array of a rotor for a motor according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0024] The terms used herein are for the purpose of describing particular embodiments and are not intended to limit the present invention. As used herein, the singular forms include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise" and / or "comprising" as used herein specify the presence of the stated features, integers, steps, operations, components, and / or elements, but do not exclude the presence or addition of any one or more of other features, integers, steps, operations, components, elements, and / or groups thereof. As used herein, the term "and / or" includes any one or all combinations of the associated listed items.

[0025] Throughout the specification, terms such as first, second, A, B, (a), (b), etc. may be used to describe various components, but the components should not be limited by the terms. Such terms are used only to distinguish the components from other components, and do not limit the nature, order, or sequence of the components.

[0026] Throughout the specification, when a component is referred to as being "coupled" or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that there may be other components in between. In contrast, when a component is referred to as being "directly coupled" or "directly connected" to another component, it should be understood that there are no other components in between. Throughout the specification, the terms used are merely used to describe specific embodiments and are not intended to limit the present invention. The singular term includes the plural term unless the context clearly indicates otherwise.

[0027] Additionally, it is understood that any one or more of the following methods or aspects thereof can be performed by at least one or more controllers. The term "controller" can refer to a hardware device including a memory and a processor. The memory is configured to store program instructions, and the processor is specifically programmed to execute the program instructions to perform one or more processes described in more detail below. The controller can control the operation of a unit, module, component, device, or the like, as described herein. It is also understood that the following methods can be performed by a device including a controller along with one or more other components, as will be appreciated by those skilled in the art.

[0028] Next, a method for assembling a motor rotor in a Halbach array according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0029] 1 shows a Halbach array applied to a rotor for a motor according to an embodiment of the present invention. As shown in FIG. 1, the rotor for a motor 100 according to the embodiment of the present invention has a structure in which a cylindrical rotor 110 and a plurality of magnets 120 are assembled in a circular Halbach array along the tangential direction of the rotor 110 around a rotation axis C. The circular Halbach array of the magnets 120 has a magnetic structure and characteristics that amplify the magnetic field of the rotor 110 toward the stator. Therefore, it plays a role in increasing the efficiency of the magnetic circuit through the magnetic field amplification of the rotor 100.

[0030] A rotor 100 according to an embodiment of the present invention can be applied to a permanent magnet synchronous motor (PMSM) applied to an electric vehicle (EVx). The motor (PMSM) may be a radial flux motor or an axial flux motor. Therefore, the rotor 100 may be configured as a radial flux rotor that forms a circular Halbach array on the outer circumferential surface of the rotor 110 centered on the rotation axis C, or as an axial flux rotor that forms a circular Halbach array on one surface of the rotor 110 in the direction of the rotation axis C, depending on the type of motor (PMSM) applied.

[0031] For ease of explanation, the rotor 100 will be described below assuming a method of assembling a radial magnetic flux rotor that forms a circular Halbach array (e.g., left upward arrow, ←, left downward arrow, right downward arrow, →, right upward arrow) based on six-divided (pair) magnets 120 as shown in Fig. 1. Fig. 2 shows a state in which pre-magnetization is assembled on a rotor according to an embodiment of the present invention. Fig. 3 shows pre-magnetized magnets assembled in the tangential direction of a rotor according to an embodiment of the present invention, and Fig. 4 shows a part where unmagnetized magnets are assembled between the pre-magnetized magnets. Fig. 5 shows a method of forming a Halbach array magnetism on a rotor using a magnetizing yoke according to an embodiment of the present invention.

[0032] 2 to 5, the method for assembling the Halbach array of the rotor 100 for a motor according to the embodiment of the present invention includes a first step of assembling a plurality of pre-magnetized magnets 121 having a magnetization direction in a tangential direction of a cylindrical rotating body 110 after preferentially magnetizing them at a certain interval; a second step of assembling unmagnetized magnets 122 between the plurality of pre-magnetized magnets 121 assembled on the rotating body 110 to generate the rotor 100; and a third step of fixing a magnetizing yoke 200 to the pre-magnetized magnets 121 and the unmagnetized magnets 122 assembled on the rotor 100, and then generating a magnetic field to post-magnetize the unmagnetized magnets 122 to realize a circular Halbach array.

[0033] The detailed steps performed in each step will be described below.

[0034] Preferably, the first step includes a step of applying a bond 130 to one side of the pre-magnetized magnet 121, and then installing the magnet at the assembly position by an assembly device such as an orthogonal robot or an articulated robot, and then hardening the bond 130. Here, the assembly device can use a known technology by gripping the magnet through a clamp and transferring it through a mechanical movement.

[0035] The pre-magnetized magnet 121 can be assembled without interference from surrounding magnetism even when magnetized through magnetization. Also, referring to Fig. 3, the pre-magnetized magnet 121 is assembled with magnetized magnets in two directions, clockwise and counterclockwise. At this time, the pre-magnetized magnet 121 is magnetized in the same magnetization direction, and then the magnetization direction is changed by the single assembly device, and the magnetized magnets are assembled alternately clockwise and counterclockwise. In other words, although the orientation of the pre-magnetized magnet 121 is the same, the magnetization direction (clockwise / counterclockwise) to be assembled after magnetization can be changed by the single assembly device, simplifying the production equipment.

[0036] Next, in the second step, the bond 130 is applied to one side of the unmagnetized magnets 122, and they are assembled simultaneously using an assembly device such as an orthogonal robot or an articulated robot without waiting for the bond 130 to harden. As described in the background of the invention, in the prior art, magnetized magnets are bonded and assembled. In this case, in the prior art, the magnets are flowed by the multiplying force until the bond 130 hardens, so they cannot be assembled simultaneously, and they must be assembled one by one after waiting for the bond 130 to harden, which takes a lot of time.

[0037] 4, the unmagnetized magnet 122 according to the embodiment of the present invention can be assembled without magnetization and does not generate magnetic force / multiplication force, so there is no need to wait until the bond 130 hardens, and it can be automatically assembled continuously at the same time. Therefore, there is an effect of reducing the process cycle time through the automation of magnet assembly and improving product productivity through efficient assembly.

[0038] Next, in the third step, the magnetizing yoke 200 fixes the plurality of air-core coils 210 arranged in a protruding form along the inner circumferential surface of the cylindrical body in the correct positions corresponding to the unmagnetized magnets 122, and magnetizes them in the magnetic field direction. For example, Fig. 6 shows the magnetic field direction generated in the yoke during magnetization according to an embodiment of the present invention and the magnetization direction of the magnetized magnetized magnet thereby.

[0039] Referring to FIG. 6, the unmagnetized magnets 122 are post-magnetized along the direction of the magnetic field generated through the air-core coil 210 of the magnetizing yoke 200, and the post-magnetized magnets 122 (hereinafter, denoted by the same reference numerals as the unmagnetized magnets) form their own magnetization directions, thereby realizing a six-division Halbach array.

[0040] For example, the six-division Halbach array includes a first post-magnetized magnet 122-1 in which a first magnetic field (arrow pointing upright) rising on the outer diagonal in the clockwise direction is formed between two pre-magnetized magnets 121 having clockwise and counterclockwise magnetic fields (→←), and a second post-magnetized magnet 122-2 in which a second magnetic field (arrow pointing up left) rising on the outer diagonal in the counterclockwise direction is formed, and a third post-magnetized magnet 122-3 in which a third magnetic field (arrow pointing down left) falling on the inner diagonal in the counterclockwise direction is formed between two pre-magnetized magnets 121 having counterclockwise and clockwise magnetic fields (←→), and a fourth post-magnetized magnet 122-4 in which a fourth magnetic field (arrow pointing down right) falling on the inner diagonal in the clockwise direction is formed.

[0041] At this time, the pre-magnetized magnet 121 according to the embodiment of the present invention is characterized in that it is boosted in the same magnetic field direction as the magnetic field direction of the magnetizing yoke 200 during the post-magnetization, thereby increasing the magnetization rate of the post-magnetized magnet 122.

[0042] FIG. 7 shows a comparison of the magnetization strength of a magnet that is magnetized without pre-magnetization in the conventional art and the magnetization strength of a magnet that is magnetized after assembling a pre-magnetized magnet in the tangential direction according to an embodiment of the present invention.

[0043] In the following drawings, the direction and size of the arrows indicate the magnetization direction and magnetization strength of the magnetized magnet. Referring to Figure 7(A), when a magnet that is not magnetized is assembled to a rotor without pre-magnetization as in the conventional technology and a magnetic field is applied through a magnetizing yoke, the magnetic susceptibility (a) is low in the part where the magnetic field of the yoke and the position of the magnet do not match (tangential direction of the rotor) when magnetized. In addition, the magnetic susceptibility (b) of the part where the magnetic field direction of the yoke is dispersed (diagonal direction) when magnetized also drops, resulting in a problem of the magnetization performance of the entire rotor being reduced.

[0044] In contrast, referring to FIG. 7(B), the rotor 100 according to an embodiment of the present invention secures magnetic susceptibility (100% magnetization) for the parts where the magnetic field and the magnet position do not coincide by preferentially assembling the pre-magnetized magnet 121 in which the magnetization direction is formed along the tangent of the rotor 110.

[0045] In addition, there is an effect that the magnetization performance of the entire rotor 100 can be improved by boosting the portion (diagonal direction) where the magnetic field direction of the magnetization yoke 200 is dispersed during post-magnetization through the pre-magnetization magnet 121.

[0046] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various other modifications are possible.

[0047] For example, Fig. 8 shows an example of a Halbach arrangement of a rotor for a motor according to another embodiment of the present invention. Referring to Fig. 8, the above-mentioned embodiment of the present invention has been described with a focus on a 6-division Halbach arrangement, but the embodiment of the present invention is not limited thereto, and a rotor 100 having a 4-division or 8-division arrangement structure can be manufactured. In this case, the Halbach array assembly method of the rotor 100 having a 4-split or 8-split array structure is the same as the first to third steps described above, and the number of poles and the number of divisions of the post-magnetized magnets 122 that are magnetized after assembly can be applied between the multiple pre-magnetized magnets 121 assembled after the rotor 110 is preferentially magnetized in the second step.

[0048] For example, the four-split Halbach array may include a fifth post-magnetized magnet 122-5 in which a fifth magnetic field (↑) rising vertically outward is formed between two pre-magnetized magnets 121 having clockwise and counterclockwise magnetic fields (→←), and a sixth post-magnetized magnet 122-6 in which a sixth magnetic field (↓) falling vertically inward is formed between two pre-magnetized magnets 121 having counterclockwise and clockwise magnetic fields (←→).

[0049] In addition, the 8th divided pipe array may further form a 6th post magnetized magnet 122-6 of a 6th magnetic field (↓) descending vertically inward between the third post magnetized magnet 122-3 on which the third magnetic field (arrow pointing downwards to the left) is formed and the fourth post magnetized magnet 122-4 on which the fourth magnetic field (arrow pointing downwards to the right) is formed in the 6-divided Halbach array, and may further form a 5th post magnetized magnet 122-5 of a 5th magnetic field (↑) ascending vertically outward between the first post magnetized magnet 122-1 on which the first magnetic field (arrow pointing upwards to the right) is formed and the second post magnetized magnet 122-2 on which the second magnetic field (arrow pointing upwards to the left) is formed.

[0050] FIG. 8 shows a Halbach array of an outer rotor according to another embodiment of the present invention. The rotor 100 according to the embodiment of the present invention has been described assuming an inner rotor in which a plurality of magnets 120 are assembled in a Halbach array on the outer circumferential surface of the rotor 110. However, referring to Fig. 8, the rotor 100 according to another embodiment of the present invention may be manufactured as an outer rotor in which a plurality of magnets 120 are assembled in a Halbach array on the inner circumferential surface of the rotor 110.

[0051] 9, the rotor 100 may be manufactured as an axial flux rotor having a circular Halbach array formed on one side of the rotor 110 in the direction of the rotation axis C depending on the type of motor (PMSM). Since the outer rotor and the axial flux rotor are manufactured in a different manner only in the assembly position of the magnet 120, it is obvious that they can be realized through the above-described embodiments of the present invention.

[0052] As described above, according to the embodiment of the present invention, the pre-magnetized magnets are first assembled in the tangential direction of the rotor, and the non-magnetized magnets are assembled and then magnetized to realize a circular Halbach array, thereby automating magnet assembly without interference due to magnetic force / force multiplication. In addition, by automating the circular Halbach array assembly of the rotor and simplifying the magnetization direction assembly of the pre-magnetized magnets, it is possible to reduce the time, labor costs, and equipment costs involved in manual assembly.

[0053] In addition, the pre-magnetized magnets, whose magnetization direction is formed along the tangent of the rotor, are assembled first, thereby ensuring the magnetic susceptibility of the parts where the magnetic field and the magnet position do not match when magnetized, and improving the magnetic susceptibility through magnetic field boosting when magnetizing the unmagnetized magnets.

[0054] The embodiments of the present invention may be embodied not only through the apparatus and / or method described above, but also through a program for embodying functions corresponding to the configuration of the embodiments of the present invention, a recording medium on which the program is recorded, etc., and such an embodiment can be easily implemented by a person skilled in the technical field to which the present invention pertains from the description of the embodiments described above.

[0055] Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims also belong to the scope of the present invention. [Explanation of symbols]

[0056] 100 rotors 110 Rotating Body 120 Magnet 121 Pre-magnetized magnet 122 Unmagnetized magnet (later magnetized magnet) 122-1 to 122-6 1st post-magnetized magnet to 6th post-magnetized magnet 130 Bond 200 Magnetizing Yoke 210 Air core coil

Claims

1. A first step of assembling a plurality of pre-magnetized magnets having a magnetization direction in a tangential direction of a cylindrical rotating body at regular intervals; a second step of assembling non-magnetized magnets between the plurality of pre-magnetized magnets assembled to the rotating body to generate a rotor; a third step of fixing a magnetizing yoke to the pre-magnetized magnets and the unmagnetized magnets assembled to the rotor, and then generating a magnetic field to post-magnetize the unmagnetized magnets, thereby realizing a circular Halbach array; A method for assembling a Halbach array of a rotor for a motor, comprising:

2. The first step comprises:

2. The method of claim 1, further comprising the steps of applying a bond to one surface of the pre-magnetized magnet, and then seating the pre-magnet at a corresponding assembly position by a robot and hardening the bond.

3. The pre-magnetized magnet is 2. The method for assembling a Halbach array of a rotor for a motor according to claim 1, wherein the magnetization direction is changed by a single robot after magnetization in the same magnetization direction, and the rotor is assembled alternately in a clockwise and counterclockwise direction.

4. The second step comprises:

2. The method of claim 1, further comprising the steps of applying a bond to one surface of the unmagnetized magnets and assembling the magnets simultaneously using a robot without waiting for the bond to harden.

5. The third step is 2. The method of claim 1, further comprising the steps of: fixing a plurality of air-core coils arranged in a protruding form along an inner circumferential surface of the cylindrical body of the magnetizing yoke in correct positions corresponding to unmagnetized magnets, and magnetizing the air-core coils in a direction of a magnetic field.

6. The rotor is 2. The method for assembling a Halbach array of a rotor for a motor according to claim 1, wherein the post-magnetization magnet is assembled in a circular Halbach array structure divided into four, six, or eight parts depending on the number of poles and the number of parts divided.

7. The four-part circular Halbach array is A fifth post-magnetization magnet in which a fifth magnetic field (↑) that rises vertically outward is formed between two pre-magnetization magnets having clockwise and counterclockwise magnetic fields (→←); A sixth post-magnetization magnet in which a sixth magnetic field (↓) descending vertically inward is formed between two pre-magnetization magnets having counterclockwise and clockwise magnetic fields (←→); The method for assembling a Halbach array of a rotor for a motor according to claim 6, further comprising:

8. The six-division circular Halbach array is A first post-magnetized magnet is formed with a first magnetic field (arrow pointing up right) rising on the outer diagonal in a clockwise direction between two pre-magnetized magnets having a clockwise and a counterclockwise magnetic field (→←), and a second post-magnetized magnet is formed with a second magnetic field (arrow pointing up left) rising on the outer diagonal in a counterclockwise direction; Between two pre-magnetized magnets having counterclockwise and clockwise magnetic fields (←→), a third post-magnetized magnet is formed with a third magnetic field (arrow pointing downwards to the left) descending on the inner diagonal in the counterclockwise direction, and a fourth post-magnetized magnet is formed with a fourth magnetic field (arrow pointing downwards to the right) descending on the inner diagonal in the clockwise direction; The method for assembling a Halbach array of a rotor for a motor according to claim 6, further comprising:

9. The eight-division circular Halbach array is In the six-division Halbach array, a sixth post-magnetized magnet having a sixth magnetic field (↓) descending vertically inward is further formed between the third post-magnetized magnet in which the third magnetic field (arrow pointing downward to the left) is formed and the fourth post-magnetized magnet in which the fourth magnetic field (arrow pointing downward to the right) is formed, 10. The Halbach array assembling method for a motor rotor according to claim 8, further comprising forming a fifth post-magnetized magnet having a fifth magnetic field (↑) rising vertically outward between the first post-magnetized magnet having the first magnetic field (arrow pointing upright) and the second post-magnetized magnet having the second magnetic field (arrow pointing up left).

10. The rotor is 2. The method of claim 1, wherein the rotor for a motor is manufactured into at least one of an inner rotor in which a plurality of magnets are assembled in a Halbach array on an outer peripheral surface of the rotor, an outer rotor in which a plurality of magnets are assembled in a Halbach array on an inner peripheral surface of the rotor, and an axial flux rotor.

11. A motor rotor manufactured by the method for assembling a motor rotor in a Halbach array according to any one of claims 1 to 10.

Images