Disk motor rotor, disk motor and power consumer

Abstract

The present invention provides a rotor and a disk motor. The rotor is divided into multiple magnetic pole units along its circumferential direction, each magnetic pole unit including at least two magnetic bodies, the magnetic bodies of each magnetic pole unit having the same magnetization direction, and the magnetic bodies of any two adjacent magnetic pole units having opposite magnetization directions. The present invention increases the number of flux barriers in the magnetic pole units, which is advantageous for reducing the armature reaction and iron loss of the stator, and also for improving the magnetization effect of the rotor, ultimately increasing the torque density and efficiency of the motor.

Description

[Technical Field]

[0001] The present application relates to the field of motors, and more particularly to rotors of disk motors, disk motors and power consumers. [Background technology]

[0002] Disk motors, also known as axial magnetic field motors, have a magnetic field direction parallel to the rotor's rotation axis. Axial magnetic fields not only have a high magnetic energy density, but also a large space for energy exchange, so the torque density of the motor is significantly improved compared to radial magnetic fields. Disk motors have attracted increasing attention due to their advantages such as compact structure, high efficiency, and high power density, making them particularly suitable for applications requiring high torque density and compact space, such as electric vehicles, renewable energy systems, flywheel energy storage systems, and industrial equipment.

[0003] In the development of disk motors, how to improve the torque density and efficiency of the motor is an important research direction in motor technology. Summary of the Invention

[0004] The present application provides a rotor for a disk motor, a disk motor, and a power consuming device that can improve the torque density and efficiency of the motor.

[0005] According to a first aspect, an embodiment of the present application provides a rotor for a disk motor, the rotor being divided into a plurality of magnetic pole units along its circumferential direction, each magnetic pole unit including at least two magnetic bodies, the magnetization directions of the magnetic bodies of each magnetic pole unit being the same along the circumferential direction of the rotor, and the magnetization directions of the magnetic bodies of any two adjacent magnetic pole units being opposite to each other.

[0006] In the above solution, the magnetization directions of two adjacent magnetic pole units are opposite, and each magnetic pole unit includes at least two magnetic bodies with the same magnetization direction, thereby increasing the number of magnetic material layers in each magnetic pole unit. Increasing the number of flux barriers in the magnetic pole unit is beneficial to reducing the armature reaction and iron loss of the stator, as well as improving the magnetization effect of the rotor, and ultimately improving the torque density and efficiency of the motor.

[0007] In some embodiments, the rotor further includes a plurality of magnetic conductive bodies arranged at intervals along the circumferential direction, with one magnetic body interposed between any two adjacent magnetic conductive bodies. The magnetic conductive bodies have a magnetic conductive effect and reinforce the magnetic field strength of the magnetic pole units.

[0008] In some embodiments, the plurality of magnetic pole units are uniformly distributed around the rotor circumference to enhance the uniformity of the magnetic field strength distribution of the rotor.

[0009] In some embodiments, the magnetic pole unit includes at least one first magnetic body group, each first magnetic body group including two first magnetic bodies, the two first magnetic bodies being symmetrically distributed along a centerline of the magnetic pole unit.

[0010] In the above solution, the number of first magnetic bodies is an even number, and the two first magnetic bodies in each first magnetic body group are distributed symmetrically, ensuring that the magnetic field strength of the magnetic pole unit is uniformly distributed and improving the electromagnetic performance of the disk motor.

[0011] In some embodiments, the magnetic pole unit further includes one second magnetic body, and the second magnetic body is disposed on the centerline.

[0012] In the above solution, the number of magnetic bodies in the magnetic pole unit is further increased, and by increasing the number of magnetic bodies in the magnetic pole unit, the number of flux barriers in the magnetic pole unit is increased, which is more beneficial to reducing the armature reaction and iron loss of the stator, improving the magnetic collecting effect, and ultimately increasing the torque density and efficiency of the motor. The second magnetic body is located on the center line, which can improve the uniformity of the magnetic field strength distribution of the magnetic pole unit.

[0013] In some embodiments, the first magnetic body and the second magnetic body have different sizes along the magnetization direction, which is advantageous for improving the air gap magnetic density harmonics, thereby achieving optimal electromagnetic performance of the motor, and also reducing the risk of demagnetization of the magnetic body by increasing the size of the magnetic body.

[0014] In some embodiments, the magnetic pole unit includes a plurality of first magnetic material groups, and in one magnetic pole unit, the two first magnetic materials of each first magnetic material group are arranged at an angle to each other, and the angles formed by the first magnetic materials of the plurality of first magnetic material groups are different from each other.

[0015] In the above solution, the two first magnetic bodies of each first magnetic body group are arranged at different angles, and the angles between the first magnetic bodies of each first magnetic body group can be set arbitrarily, which is advantageous for improving air gap magnetic field harmonics and achieving optimal electromagnetic performance of the motor.

[0016] In some embodiments, in one magnetic pole unit, the first magnetic bodies of at least two first magnetic body groups have different sizes along the magnetization direction.

[0017] In the above solution, the sizes of the first magnetic materials of the multiple first magnetic material groups along the magnetization direction may be set to be different, which is advantageous for improving the air gap magnetic density harmonics and achieving optimal electromagnetic performance of the motor. At the same time, increasing the size of the magnetic materials can reduce the risk of demagnetization of the magnetic materials.

[0018] In some embodiments, the angle between the two outermost magnetic bodies of the magnetic pole unit is smaller than the corresponding central angle of the magnetic pole unit in the rotor, providing space for installing magnetic conductive bodies at the outermost parts of each magnetic pole unit and improving the magnetic field strength of the magnetic pole unit.

[0019] In some embodiments, each magnetic pole unit has at least one sector-shaped magnetic material, which is advantageous for increasing the space utilization of the magnetic material and for the motor to achieve optimal electromagnetic performance.

[0020] In some embodiments, the magnetic material is skewed to advantageously reduce motor torque ripple and back EMF harmonics, improve noise and vibration, and achieve optimal electromagnetic performance in the motor.

[0021] An embodiment of the second aspect of the present application provides a disk motor, the disk motor including a stator and a rotor according to any one of the above embodiments, the stator and the rotor being spaced apart along the axial direction of the rotor.

[0022] An embodiment of a third aspect of the present application provides a power consuming device, the power consuming device including the disk motor of any one of the above embodiments. [Brief explanation of the drawings]

[0023] In order to more clearly explain the technical solutions of the embodiments of the present application, the following briefly introduces the drawings that need to be used in the embodiments of the present application. It is obvious that the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the drawings without exerting any creative efforts. [Figure 1] FIG. 2 is a structural schematic diagram of a rotor according to a first embodiment of the present application. [Figure 2] FIG. 2 is a top view of a rotor according to a first embodiment of the present application. [Figure 3] FIG. 2 is a schematic diagram of a magnetic pole unit according to a first embodiment of the present application. [Figure 4]FIG. 4 is a structural schematic diagram of a rotor according to a second embodiment of the present application. [Figure 5] FIG. 10 is a top view of a rotor according to a second embodiment of the present application. [Figure 6] FIG. 10 is a schematic diagram of a magnetic pole unit according to a second embodiment of the present application. [Figure 7] FIG. 10 is a schematic diagram of a magnetic pole unit according to a third embodiment of the present application. [Figure 8] FIG. 10 is a schematic diagram of a magnetic pole unit according to a fourth embodiment of the present application. [Figure 9] FIG. 10 is a schematic diagram of a magnetic pole unit according to a fifth embodiment of the present application. [Figure 10] FIG. 10 is a schematic diagram of a magnetic pole unit according to a sixth embodiment of the present application. [Figure 11] FIG. 10 is a top view of a rotor according to a sixth embodiment of the present application. [Figure 12] FIG. 10 is a top view of a rotor according to a seventh embodiment of the present application. [Figure 13] FIG. 10 is a schematic diagram of a magnetic pole unit according to a seventh embodiment of the present application. [Figure 14] FIG. 13 is a top view of a rotor according to an eighth embodiment of the present application. [Figure 15] FIG. 10 is a schematic diagram of a magnetic pole unit according to an eighth embodiment of the present application. [Figure 16] FIG. 10 is a schematic diagram of a torque change simulation of a motor using a rotor according to a second embodiment of the present application and a conventional rotor. [Figure 17] FIG. 10 is a schematic diagram of a simulation of changes in iron loss performance of a motor using a rotor according to a second embodiment of the present application and a conventional rotor. DETAILED DESCRIPTION OF THE INVENTION

[0024] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present application, the following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without any creative efforts fall within the scope of protection of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art of this application, and the terms used in the specification of this application are only for describing specific embodiments and are not intended to limit this application, and the terms "comprises," "has," and any variations thereof in the specification and claims of this application and the above drawings are intended to cover a non-exclusive "comprise." The terms "first," "second," etc. in the specification and claims of this application or the above drawings are not intended to describe a specific order or a hierarchical relationship, but are intended to distinguish different objects.

[0026] An "embodiment" referred to in this application means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of this phrase in various places in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive, separate, or alternative embodiments of other embodiments.

[0027] In the description of this application, it should be explained that unless otherwise clearly defined or limited, the terms "attached," "connected," "joined," and "attached" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0028] The term "and / or" in this application merely describes the relationship between related objects and indicates that three relationships may exist, for example, A and / or B may represent three cases: A alone, a combination of A and B, and B alone. Also, the character " / " in this application generally indicates that the related objects before and after are in an "or" relationship.

[0029] In the embodiments of the present application, the same reference numerals represent the same elements, and for the sake of brevity, detailed descriptions of the same elements will be omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various elements in the embodiments of the present application shown in the drawings, and the overall thickness, length, width, and other dimensions of the power supply device, are merely illustrative and should not be construed as any limitation on the present application.

[0030] The term "plurality" as used herein refers to two or more (including two).

[0031] It should be noted that, unless there is a conflict, the embodiments and features in the embodiments in the present application can be combined with each other.

[0032] The inventors noted that disc motors have been attracting increasing attention due to their advantages of compact structure, high efficiency, and high power density, and are particularly suitable for applications requiring high torque density and compact space, such as electric vehicles, renewable energy systems, flywheel energy storage systems, and industrial equipment. After further research, they discovered that the rotors of typical surface permanent magnet disc motors have a short axial distance between the rotor core and the stator core, resulting in strong stator armature reaction, which increases iron loss when the stator is excited by AC current, reducing the motor's efficiency under light load operating conditions. Meanwhile, the magnetic collection effect of typical disc motors with spoke-shaped permanent magnets is limited, making it difficult to improve the motor's torque density.

[0033] In view of this, the present application provides a technical solution in which the rotor is divided into a plurality of magnetic pole units along its circumferential direction, each magnetic pole unit including at least two magnetic bodies, the magnetic bodies of each magnetic pole unit having the same magnetization direction and the magnetic bodies of any two adjacent magnetic pole units having opposite magnetization directions, and the technical solution increases the number of magnetic body layers in each magnetic pole unit, thereby increasing the number of flux barriers in the magnetic pole unit, which is beneficial to reducing the armature reaction and iron loss of the stator, and also improves the magnetization effect of the rotor, ultimately increasing the torque density and efficiency of the motor.

[0034] FIG. 1 is a structural schematic diagram of a rotor according to a first embodiment of the present application, FIG. 2 is a top view of the rotor according to the first embodiment of the present application, and FIG. 3 is a schematic diagram of a magnetic pole unit according to the first embodiment of the present application.

[0035] Referring to Figures 1 to 3 in combination, in a first embodiment, the rotor 100 of the disk motor is divided into a plurality of magnetic pole units 10 along its circumferential direction, and each magnetic pole unit 10 includes at least two magnetic bodies 20, the magnetization directions of the magnetic bodies 20 of each magnetic pole unit 10 are the same, and the magnetization directions of the magnetic bodies 20 of any two adjacent magnetic pole units 10 are opposite.

[0036] The magnetic body 20 is an object that is inherently magnetic or that becomes magnetic after being magnetized. It may be a soft or hard magnetic material, and is an object that generates a magnetic field by itself without the application of current or induction, attracting materials such as iron, cobalt, and nickel. For example, the magnetic body may be a permanent magnet, such as natural magnet (magnetite), or artificial magnetic steel, which is resistant to loss of magnetism and magnetization. Magnetic steel may be composed of multiple metals with relatively high hardness, such as iron and aluminum, nickel, or cobalt, or may be composed of copper, niobium, or tantalum.

[0037] A magnetic material may be magnetized to saturation along the same direction, which is called the magnetization direction or magnetization direction.

[0038] In this embodiment, the magnetization direction of all the magnetic bodies 20 in each magnetic pole unit 10 is the same, i.e., the magnetization directions of the magnetic bodies 20 in the same magnetic pole unit 10 are all distributed along the circumferential clockwise or counterclockwise direction, thereby increasing the number of magnetic bodies 20 in each magnetic pole unit 10. The magnetization directions of two adjacent magnetic pole units 10 are opposite, and multiple magnetic pole units 10 are arranged alternately with different magnetization directions, for example, the magnetic bodies 20 of a first magnetic pole unit are magnetized along the circumferential clockwise direction, i.e., clockwise from N pole to S pole, while the magnetic bodies 20 of the next adjacent magnetic pole unit 10 along the circumferential clockwise direction are magnetized along the circumferential counterclockwise direction, i.e., counterclockwise from N pole to S pole, thereby generating a constant magnetic field of the rotor 100 with a number of poles greater than the number of blocks of magnetic bodies 20.

[0039] In the above solution, the magnetization directions of two adjacent magnetic pole units 10 are opposite, and each magnetic pole unit 10 includes at least two magnetic bodies 20 with the same magnetization direction, increasing the number of layers of magnetic bodies 20 in each magnetic pole unit 10. Increasing the number of flux barriers in the magnetic pole unit 10 is beneficial to reducing the armature reaction and iron loss of the stator, and also improves the magnetization effect of the rotor 100, ultimately increasing the torque density and efficiency of the motor.

[0040] In some embodiments, the rotor 100 may further include a chassis 30, and the magnetic body 20 may be fixed to the chassis 30 by means of bolts, adhesive, snaps, or the like. A through hole is opened in the center of the chassis 30 through which the rotation axis of the rotor 100 passes, and multiple magnetic bodies 20 are arranged at intervals around this through hole along the circumferential direction of the chassis 30 to form multiple magnetic pole units 10.

[0041] Furthermore, in some embodiments, the rotor 100 further includes a plurality of magnetic bodies 40 arranged at intervals along the circumferential direction, with one magnetic body 20 sandwiched between any two adjacent magnetic bodies 40.

[0042] The magnetic conductive body 40 is a rotor core, and may be a laminated or block-shaped element made of a magnetic material such as ferrite, or may be made by laminating, winding, or powder metallurgy die-casting silicon steel plates.

[0043] The rotational torque of the disk motor rotor 100 is derived from the induced magnetic field acting between the stator and the rotor 100, and the rotor core, like the stator core, can reinforce the magnetic field acting torque between them by reinforcing the strength of the induced magnetic field and the density of the magnetic lines of force. Therefore, the magnetic conductor 40 of this embodiment has a magnetic conductive effect and can reinforce the magnetic field strength and magnetic field torque of the magnetic pole unit 10.

[0044] In some embodiments, the magnetic conductive bodies 40 may be fixed to the chassis 30 by methods such as bolts, adhesives, or snaps, and multiple magnetic conductive bodies 40 are arranged at intervals around the circumferential direction of the through-hole of the chassis 30. The cross section of the magnetic conductive bodies 40 along a direction parallel to the chassis 30 may be fan-shaped or rectangular, a fixing groove is formed between two adjacent magnetic conductive bodies 40, and the magnetic bodies 20 are fitted into this fixing groove in a spoke-like manner along the radial direction of the rotor 100, and each magnetic pole unit 10 is provided with multiple spoke-shaped magnetic bodies 20 arranged at intervals, each magnetic body 20 extending along the radial direction of the rotor 100, and the number of layers may be 2 to N, where N is an integer greater than 2.

[0045] Specifically, in some embodiments, the multiple magnetic pole units 10 are uniformly distributed along the circumferential direction of the rotor 100. The rotor 100 is divided into multiple magnetic pole units 10 uniformly along its circumferential direction, which makes the magnetic field distribution of the rotor 100 uniform and reinforces the uniformity of the magnetic field strength distribution of the rotor 100.

[0046] More specifically, in some embodiments, as shown in FIG. 3 , the magnetic pole unit 10 includes at least one first magnetic body group 50, and each first magnetic body group 50 includes two first magnetic bodies 20 a, and the two first magnetic bodies 20 a are symmetrically distributed along the center line 11 of the magnetic pole unit 10.

[0047] The first magnetic body 20a is any one of the plurality of magnetic bodies 20. In other words, the two magnetic bodies 20 symmetrically distributed along the center line 11 of the magnetic pole unit 10 of the first magnetic body group 50 are called the two first magnetic bodies 20a.

[0048] The magnetization directions of the two first magnetic bodies 20a are the same, and increasing the number of magnetic bodies 20 in the magnetic pole unit 10 increases the number of flux barriers in the magnetic pole unit 10, which is beneficial to reducing the reaction and iron loss of the stator armature, improving the magnetism collecting effect, and ultimately increasing the torque density and efficiency of the motor.

[0049] In the above solution, the number of first magnetic bodies 20a is an even number. It should be noted that the center line 11 of the magnetic pole unit 10 in this embodiment is the central symmetrical axis of the magnetic pole unit 10, i.e., the magnetic pole unit 10 is axially symmetrical along this center line 11. The first magnetic bodies 20a of the first magnetic body group 50 of each magnetic pole unit 10 are symmetrically distributed, which ensures that the magnetic field strength of the magnetic pole unit 10 is uniformly distributed and improves the electromagnetic performance of the disk motor.

[0050] FIG. 4 is a structural schematic diagram of a rotor according to a second embodiment of the present application, FIG. 5 is a top view of a rotor according to a second embodiment of the present application, and FIG. 6 is a schematic diagram of a magnetic pole unit according to a second embodiment of the present application.

[0051] 4 to 6 in combination, in the second embodiment of the present application, the magnetic pole unit 10 further includes one second magnetic body 20b, and the second magnetic body 20b is disposed on the center line 11.

[0052] The second magnetic body 20b is provided on the center line 11 so that the center line 11 passes over the second magnetic body 20b. Optionally, the second magnetic body 20b is axially symmetrical with respect to the center line 11.

[0053] Based on the first embodiment, the above solution adds a second magnetic body 20b, so that the magnetization directions of the first magnetic body 20a and the second magnetic body 20b of the first magnetic body group 50 in the same magnetic pole unit 10 are the same, and further increases the number of magnetic bodies 20 in the magnetic pole unit 10. Increasing the number of magnetic bodies 20 in the magnetic pole unit 10 increases the number of flux barriers in the magnetic pole unit 10, which is more beneficial to reducing the armature reaction and iron loss of the stator, improving the magnetism collecting effect, and ultimately increasing the torque density and efficiency of the motor. By locating the second magnetic body 20b on the center line 11, the uniformity of the magnetic field strength distribution of the magnetic pole unit 10 can be improved.

[0054] In some embodiments, the second magnetic body 20b extends along the radial direction of the rotor 100, and the second magnetic body 20b is axially symmetric with respect to the center line 11. The second magnetic body 20b is located between two first magnetic bodies 20a. This embodiment can further improve the uniformity of the magnetic field strength distribution of the magnetic pole unit 10.

[0055] 7 is a schematic diagram of a magnetic pole unit according to a third embodiment of the present invention. As shown in FIG. 7, in the third embodiment of the present invention, the first magnetic body 20a and the second magnetic body 20b have different sizes along the magnetization direction.

[0056] The size of the first magnetic body 20a along the magnetization direction is the thickness of the first magnetic body 20a along the magnetization direction, which is D1 in FIG. 7, and the two first magnetic bodies 20a in the first magnetic body group 50 have the same thickness along the magnetization direction. The size of the second magnetic body 20b along the magnetization direction is D2 in FIG. 7. Here, the first magnetic body 20a and the second magnetic body 20b are rectangular parallelepipeds, the first magnetic body 20a includes a first surface 21 and a second surface 22 that are arranged relatively parallel to each other, the north pole is close to the first surface 21, and the south pole is close to the second surface 22, the first magnetic body 20a is magnetized in the direction from the first surface 21a to the second surface 21b, and the size D1 of the first magnetic body 20a along the magnetization direction is the thickness perpendicular to the first surface 21 or the second surface 22. Similarly, the size D2 of the second magnetic body 20b along the magnetization direction is measured using the same method as the size D1 of the first magnetic body 20a along the magnetization direction.

[0057] In the above solution, the first magnetic body 20a and the second magnetic body 20b have different sizes along the magnetization direction, and the thickness D2 of the second magnetic body 20b can be set to be larger than the thickness D1 of the first magnetic body 20a, or the thickness D1 of the first magnetic body 20a can be set to be larger than the thickness D2 of the second magnetic body 20b, which is advantageous for improving the air gap magnetic density harmonics and achieving optimal electromagnetic performance of the motor. At the same time, increasing the size of the magnetic body 20 can reduce the risk of demagnetization of the magnetic body 20.

[0058] 8 is a schematic diagram of a magnetic pole unit according to a fourth embodiment of the present application. As shown in FIG. 8, in the fourth embodiment of the present application, the magnetic pole unit 10 includes a plurality of first magnetic body groups 50, and in one magnetic pole unit 10, the two first magnetic bodies 20a of each first magnetic body group 50 are arranged at an angle to each other, and the angles formed by the first magnetic bodies 20a of the plurality of first magnetic body groups 50 are different from each other.

[0059] The two first magnetic bodies 20a of each first magnetic body group 50 are distributed symmetrically at a certain angle along the center line 11 of the magnetic pole unit 10. Each magnetic pole unit 10 has M magnetic bodies 20. If M is an even number greater than 1, the magnetic pole unit 10 has M / 2 first magnetic body groups 50. If M is an odd number greater than 1, the magnetic pole unit 10 has (M-1) / 2 first magnetic body groups 50. The first magnetic bodies 20a of the multiple first magnetic body groups 50 are all distributed circumferentially in a clockwise or counterclockwise direction, and adjacent magnetic pole units 10 have opposite magnetization directions of the magnetic bodies 20. Based on the first embodiment, the fourth embodiment further increases the number of flux barriers in the magnetic pole unit 10, which is more advantageous for reducing the armature reaction and iron loss of the stator. Furthermore, setting a larger number of magnetic bodies 20 increases the torque density and efficiency of the motor.

[0060] The angle between the two magnetic bodies 20 may be the angle formed by the center lines of the two magnetic bodies 20. For example, the center lines of the magnetic bodies 20 extend along the radial direction of the rotor.

[0061] For example, if each magnetic pole unit 10 has four first magnetic bodies 20a arranged in a counterclockwise direction around the circumference, that is, the first magnetic body 20a in the first layer, the first magnetic body 20a in the second layer, the first magnetic body 20a in the third layer, and the first magnetic body 20a in the fourth layer, the first magnetic body 20a in the first layer and the first magnetic body 20a in the fourth layer constitute one first magnetic body group 50a, and the first magnetic body 20a in the second layer and the first magnetic body 20a in the third layer constitute another first magnetic body group 50b. The angle α1 between the first magnetic body 20a of the first layer and the first magnetic body 20a of the fourth layer is larger than the angle α2 between the first magnetic body 20a of the second layer and the first magnetic body 20a of the third layer, and the angle α1 between the first magnetic body 20a of the first layer and the first magnetic body 20a of the fourth layer and the angle α2 between the first magnetic body 20a of the second layer and the first magnetic body 20a of the third layer can be selected as any angle.

[0062] In the solution of the fourth embodiment, the two first magnetic bodies 20a of each first magnetic body group 50 are arranged at different angles, and the angle between the two first magnetic bodies 20a of each first magnetic body group 50 can be set arbitrarily, which is advantageous for improving air gap magnetic field harmonics and achieving optimal electromagnetic performance of the motor.

[0063] 9 is a schematic diagram of a magnetic pole unit according to a fifth embodiment of the present invention. Furthermore, as shown in FIG. 9, in one magnetic pole unit 10, the first magnetic bodies 20a of at least two first magnetic body groups 50 have different sizes along the magnetization direction.

[0064] For example, the first magnetic bodies 20a are rectangular parallelepipeds, and the thicknesses of the first magnetic bodies 20a in different first magnetic body groups 50 along the magnetization direction may be set to be different. For example, one first magnetic body group 50a may be composed of the first magnetic body 20a in the first layer and the first magnetic body 20a in the fourth layer, and the size of the first magnetic body 20a in the first magnetic body group 50a along the magnetization direction is D3. The first magnetic body 20a in the second layer and the first magnetic body 20a in the third layer may constitute another first magnetic body group 50b, and the size of the first magnetic body 20a in the first magnetic body group 50b along the magnetization direction may be D4, which may be set to be larger than D3. Here, the measurement methods for D3 and D4 are the same as those for the size D1 along the magnetization direction of the first magnetic body 20a, and the measurement method for the size D1 along the magnetization direction of the first magnetic body 20a has already been explained above, so the measurement methods for D3 and D4 will not be explained further here.

[0065] In the above solution, the sizes of the first magnetic bodies 20a of the multiple first magnetic body groups 50 along the magnetization direction may be set to different values, which is advantageous for improving the air gap magnetic density harmonics and achieving optimal electromagnetic performance of the motor. At the same time, increasing the size of the first magnetic bodies 20a can reduce the risk of demagnetization of the first magnetic bodies 20a.

[0066] Fig. 10 is a schematic diagram of a magnetic pole unit according to a sixth embodiment of the present application, and Fig. 11 is a top view of a rotor according to the sixth embodiment of the present application. As shown in Figs. 10 and 11, the angle α3 between the two outermost magnetic bodies 20 of the magnetic pole unit 10 is smaller than the corresponding central angle α4 in the rotor 100 of the magnetic pole unit 10.

[0067] The central angle α4 may be the angle between two end faces of the magnetic pole unit 10 along the circumferential direction. For example, the rotor 100 is uniformly divided into K magnetic pole units 10 along its circumferential direction, and the central angle α4 of each magnetic pole unit 10 is 360° / K. For example, in FIG. 11, the rotor 100 is uniformly divided into 8 parts, and the corresponding eight magnetic pole units 10 form an angle α4=360° / 8=45° with respect to the rotor.

[0068] By leaving a gap between the outermost magnetic bodies 20 of two adjacent magnetic pole units 10, installation space can be provided for the magnetic conductive body 40, i.e., one magnetic conductive body 40 can be shared between two adjacent magnetic pole units 10, ensuring that the outermost sides of each magnetic pole unit 10 all have a magnetic conductive body 40, thereby improving the magnetic field strength of the magnetic pole unit 10.

[0069] FIG. 12 is a top view of a rotor according to a seventh embodiment of the present application, and FIG. 13 is a schematic diagram of a magnetic pole unit according to the seventh embodiment of the present application.

[0070] 12 and 13 , in the seventh embodiment of the present application, each magnetic pole unit 10 has at least one fan-shaped magnetic body 20, which is fan-shaped in a direction parallel to the chassis 30, and the radius of the fan-shaped magnetic body 20 gradually increases in a direction away from the center of the rotor 100. All the magnetic bodies 20 of the rotor 100 may be configured in a fan shape, or one or several magnetic bodies 20 may be configured in a fan shape, and there is no specific limit to the number.

[0071] For example, for a sector-shaped magnetic body 20, the size D along the magnetization direction of the magnetic body 20 is calculated from the center of the magnetic body 20 along the rotor radial direction. For example, the magnetic body 20 includes a first surface 21 and a second surface 22 that are installed opposite each other, the first surface 21 being close to the north pole and the second surface 22 being close to the south pole. When calculating the size D in Figure 13, measurement is made in the direction from the north pole to the south pole at the center point of the magnetic body 20 along the rotor radial direction.

[0072] In the seventh embodiment, each magnetic pole unit 10 has at least one sector-shaped magnetic body 20, which improves the space utilization rate of the magnetic body 20 and is beneficial to the motor achieving optimal electromagnetic performance.

[0073] 14 is a top view of a rotor according to an eighth embodiment of the present application, and FIG. 15 is a schematic diagram of a magnetic pole unit according to the eighth embodiment of the present application. Referring to FIG. 14 and FIG. 15 together, in the eighth embodiment of the present application, the magnetic bodies 20 are skewed, i.e., the extension direction of the magnetic bodies 20 and the radial direction of the rotor 100 form an angle, which is advantageous for reducing motor torque ripple and back electromotive force harmonics, improving noise and vibration, and achieving optimal electromagnetic performance for the motor.

[0074] It should be noted that when the magnetic body 20 arranged in a skewed shape is a rectangular parallelepiped, the method for measuring the size of this magnetic body 20 along the magnetic field direction is the same as the method for measuring the size D1 of the first magnetic body 20a along the magnetization direction in the third embodiment, and when the magnetic body 20 arranged in a skewed shape is a fan shape, the method for measuring the size of this magnetic body 20 along the magnetic field direction is the same as the method for measuring the size D of the magnetic body 20 along the magnetization direction in the seventh embodiment.

[0075] An embodiment of the second aspect of the present application provides a disk motor, which includes a stator and the rotor 100 of any one of the above embodiments, and the stator and the rotor 100 are spaced apart along the axial direction of the rotor 100. This disk motor employs all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects of the technical solutions of the above embodiments, and will not be further described here.

[0076] Figure 16 is a schematic diagram of a torque change simulation of a motor using the rotor of the second embodiment of the present application and a conventional rotor, where A on the abscissa of Figure 16 represents the conventional rotor and B represents the rotor of the second embodiment. As can be seen from Figure 16, the motor using the rotor of the second embodiment of the present application has a stronger magnetic collection effect, weakens the armature reaction, and can improve the motor output torque by 61%.

[0077] 17 is a schematic diagram of a simulation of changes in iron loss performance of a motor using the rotor of the second embodiment of the present application and a conventional rotor, where A on the abscissa of FIG. 17 represents the conventional rotor and B represents the rotor of the second embodiment. As can be seen from FIG. 17, the motor using the rotor of the second embodiment of the present application had a 19% reduction in full load iron loss at 10 krpm.

[0078] An embodiment of a third aspect of the present application provides a power consuming device, including the disk motor described above. The power consuming device may be, but is not limited to, a battery vehicle, an electric vehicle, a steamship, a spacecraft, etc., where the spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, etc.

[0079] According to some embodiments of the present application, the present application provides a rotor 100 for a disk motor, the rotor 100 being divided into a plurality of magnetic pole units 10 along its circumferential direction, each magnetic pole unit 10 including at least two magnetic bodies 20, the magnetization directions of the magnetic bodies 20 of each magnetic pole unit 10 being the same and increasing, and the magnetization directions of the magnetic bodies 20 of any two adjacent magnetic pole units 10 being opposite. The rotor 100 further includes a plurality of magnetic conductive bodies 40 arranged at intervals along the circumferential direction, with one magnetic body 20 sandwiched between any two adjacent magnetic conductive bodies 40. The magnetic conductive bodies 40 have a magnetic conductive effect and reinforce the magnetic field strength of the magnetic pole units 10. The plurality of magnetic pole units 10 are uniformly distributed along the circumferential direction of the chassis 30, reinforcing the uniformity of the magnetic field strength distribution of the rotor 100. The magnetic pole unit 10 includes a first magnetic body group 50 , and the first magnetic body group 50 includes two first magnetic bodies 20 a that are symmetrically distributed along the center line 11 of the magnetic pole unit 10 .

[0080] Finally, it should be noted that the above examples are only for illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above examples, those skilled in the art may still modify the technical solutions described in the above examples or replace some of the technical features therein with equivalents, but such modifications or replacements should be understood to not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotor for a disk motor, the rotor being divided into a plurality of magnetic pole units along its circumferential direction, each of the magnetic pole units including at least two magnetic bodies, the magnetization direction of the magnetic bodies of each of the magnetic pole units being the same along the circumferential direction of the rotor, and the magnetization directions of the magnetic bodies of any two adjacent magnetic pole units being opposite.

2. 2. The rotor according to claim 1, further comprising a plurality of magnetic conductive bodies arranged at intervals along the circumferential direction, and one of the magnetic bodies is fitted between any two adjacent magnetic conductive bodies.

3. The rotor according to claim 1 or 2, wherein the plurality of magnetic pole units are uniformly distributed along the circumferential direction of the rotor.

4. 4. The rotor according to claim 1, wherein the magnetic pole unit includes at least one first magnetic body group, each of the first magnetic body groups includes two first magnetic bodies, and the two first magnetic bodies are distributed symmetrically along a center line of the magnetic pole unit.

5. 5. The rotor of a disk motor according to claim 4, wherein the magnetic pole unit further includes one second magnetic body, the second magnetic body being provided on the center line.

6. The rotor according to claim 5 , wherein the first magnetic body and the second magnetic body have different sizes along the magnetization direction.

7. 7. A rotor according to claim 4, wherein the magnetic pole unit includes a plurality of the first magnetic body groups, and in one magnetic pole unit, the two first magnetic bodies of each of the first magnetic body groups are arranged at an angle to each other, and the angles formed by the first magnetic bodies of the plurality of first magnetic body groups are different from each other.

8. The rotor according to claim 7 , wherein in one magnetic pole unit, the first magnetic bodies of at least two of the first magnetic body groups have different sizes along the magnetization direction.

9. 9. The rotor according to claim 1, wherein an angle formed between two outermost magnetic bodies of the magnetic pole unit is smaller than a corresponding central angle of the magnetic pole unit in the rotor.

10. The rotor according to claim 1 , wherein each of the magnetic pole units has at least one sector-shaped magnetic body.

11. The rotor according to claim 1 , wherein the magnetic bodies are arranged in a skewed manner.

12. A disk motor comprising: a stator; and a rotor according to any one of claims 1 to 11, wherein the stator and rotor are spaced apart along the axial direction of the rotor.

13. A power consuming device comprising the disk motor of claim 12.

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