Rotor assembly for an axial flux motor and axial flux motor

Abstract

The application discloses a rotor assembly for an axial flux motor and an axial flux motor, and the rotor assembly for the axial flux motor comprises a support, the support is annular and fixed to a main shaft of the axial flux motor; a plurality of iron cores, the plurality of iron cores are arranged on one side of the support in an axial direction and are arranged at intervals in a circumferential direction of the support, and a mounting groove is arranged on a surface of the iron core away from an axis of the support; and a plurality of magnetic steels, the plurality of magnetic steels are respectively inserted into the plurality of mounting grooves, and the magnetic steels are inclined towards the support in one direction of the circumferential direction of the support. According to the rotor assembly for the axial flux motor, the magnetic steels can be reliably positioned, the harmonic magnetic field can be weakened, and the noise problem of the axial flux motor can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and more particularly to a rotor assembly for an axial flux motor and an axial flux motor. BACKGROUND

[0002] In the related art, the axial flux motor is prone to generate a harmonic magnetic field when in operation, which affects the performance of the axial flux motor and causes problems such as noise, thereby affecting normal use. SUMMARY

[0003] The present application aims to at least solve one of the problems in the prior art. To this end, one object of the present application is to provide a rotor assembly for an axial flux motor, which can ensure reliable positioning of the magnetic steel and can weaken the harmonic magnetic field, thereby solving the noise problem of the axial flux motor.

[0004] Another object of the present application is to provide an axial flux motor having the above rotor assembly.

[0005] The rotor assembly for an axial flux motor according to an embodiment of the present application comprises a support ring surrounding and fixed to a main shaft of the axial flux motor; a plurality of iron cores arranged on one side of the support in the axial direction and spaced apart in the circumferential direction of the support, the surface of the iron core away from the axis of the support having a mounting groove; and a plurality of magnetic steels respectively inserted into the plurality of mounting grooves, the magnetic steels being inclined toward the support in one of the circumferential directions of the support.

[0006] The rotor assembly for an axial flux motor according to an embodiment of the present application can realize the installation of the magnetic steels by the surface of the iron core away from the axis of the support having a mounting groove and a plurality of magnetic steels respectively inserted into the plurality of mounting grooves, ensure reliable positioning of the magnetic steels, avoid risks such as falling of the magnetic steels, and can eliminate the magnetic bridge structure of the rotor lamination narrow part; by the magnetic steels being inclined toward the support in one of the circumferential directions of the support, the non-uniformity of the axial flux air gap can be realized by adjusting the inclination, the size of the magnetic flux can be adjusted, the harmonic magnetic field can be weakened, the magnetic field waveform can be improved, and the noise problem of the axial flux motor can be effectively solved.

[0007] In addition, the rotor assembly for an axial flux motor according to the above embodiments of the present application can also have the following additional technical features:

[0008] The rotor assembly for an axial flux motor according to some embodiments of the present application has the inclination directions of the adjacent two magnetic steels opposite in one of the circumferential directions of the support.

[0009] According to some embodiments of the present application, the magnetic steel is circular or elliptical.

[0010] According to some embodiments of the present application, the outer profile of the magnetic steel in a cross section perpendicular to the main axis direction comprises an outer arc, an inner arc, a first waist line and a second waist line, the outer arc is located radially outside the inner arc, the first waist line and the second waist line are spaced apart along the circumferential direction of the main axis, the outer arc and the inner arc are located on a cylindrical surface with the axis of the main axis as the axis, in the direction from the outer arc to the inner arc, the first waist line and the second waist line both extend along the radial direction of the cylindrical surface; or, in the direction from the outer arc to the inner arc, the first waist line deviates from the radial direction of the cylindrical surface towards the second waist line, and the second waist line deviates from the radial direction towards the first waist line; or, in the direction from the inner arc to the outer arc, the first waist line and the second waist line deviate from the radial direction towards the circumferential side of the cylindrical surface; or, in the direction from the outer arc to the inner arc, the first waist line deviates from the radial direction of the cylindrical surface away from the second waist line, and the second waist line deviates from the radial direction of the cylindrical surface away from the first waist line; or, in the direction from the outer arc to the inner arc, the middle part of the first waist line and the second waist line bends towards the circumferential side of the cylindrical surface.

[0011] According to some embodiments of the present application, at least part of the mounting groove is arranged in the shape of the magnetic steel.

[0012] According to some embodiments of the present application, a plurality of connecting parts are arranged on the support, the connecting part is arranged between any two adjacent iron cores, the connecting part is a non-magnetic material piece, the rotor assembly further comprises a plurality of fixing pieces, each fixing piece is connected with a connecting part, the fixing piece is a non-magnetic material piece, and the fixing piece abuts against the side away from the main axis of at least one of the two magnetic steels adjacent to the connecting part where the fixing piece is arranged.

[0013] According to some embodiments of the present application, the support is a magnetic material piece, and the iron core is a magnetic material piece.

[0014] According to some embodiments of the present application, a powder metallurgy material layer is arranged on the surface of the iron core away from the support, the magnetic permeability of the powder metallurgy material layer is different from that of the support.

[0015] The axial flux motor according to the embodiment of the present application comprises a main shaft, a stator assembly which is sleeved on the main shaft, and a rotor assembly for axial flux motor according to the embodiment of the present application which is sleeved on the main shaft, the support is connected with the main shaft, and the rotor assembly is located on the axial side of the stator assembly, and the air gap is formed between the stator assembly and the rotor assembly.

[0016] According to some embodiments of the present application, the rotor assembly is two, the two rotor assemblies are respectively located on the axial sides of the stator assembly, and the air gap is respectively formed between the stator assembly and the two rotor assemblies.

[0017] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a partial structural schematic diagram of an axial flux motor according to the embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the inclined structure of a magnetic steel according to the embodiment of the present application;

[0021] Figure 3 is a structural schematic diagram of a rotor assembly according to the embodiment of the present application;

[0022] Figure 4 is a structural schematic diagram of a support according to the embodiment of the present application;

[0023] Figure 5 is a structural schematic diagram of different forms of a magnetic steel according to the embodiment of the present application.

[0024] REFERENCE SIGNS:

[0025] 100, rotor assembly; 200, main shaft; 300, stator assembly; 400, air gap;

[0026] 10, support; 11, connecting part;

[0027] 20, iron core; 21, mounting groove;

[0028] 30, magnetic steel; 31, outer camber line; 32, inner camber line; 33, first waist line; 34, second waist line; 331, first folding edge; 332, second folding edge; 341, third folding edge; 342, fourth folding edge;

[0029] 40, cylindrical surface;

[0030] 50, fixing piece;

[0031] 60, fastener. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only for explanation of the present application, and should not be construed as limiting the present application.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0034] In the description of the present application, "first feature" and "second feature" can include one or more features, and "a plurality of" means two or more, and "above" or "below" the second feature of the first feature can include direct contact between the first and second features, or can include indirect contact between the first and second features through another feature therebetween, and "above", "over" and "on" the second feature of the first feature includes directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in terms of height.

[0035] A rotor assembly 100 for an axial flux motor according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0036] Referring to Figures 1-4 As shown, the rotor assembly 100 for an axial flux motor according to an embodiment of the present application can include a bracket 10, a plurality of cores 20 and a plurality of magnetic steels 30.

[0037] Specifically, the bracket 10 surrounds and is fixed to a main shaft 200 of the axial flux motor, and the plurality (equal to or greater than two) of cores 20 are provided in the axial direction of the bracket 10 (for example, the direction of the arrow A in FIG. 1). Figure 1The plurality of iron cores 20 are arranged at intervals in the circumferential direction of the support 10, and when the plurality of iron cores 20 are forced to move, the plurality of iron cores 20 can drive the main shaft 200 to move through the support 10, so as to realize the power output of the axial flux motor. The surface of the iron core 20 away from the axis of the support 10 has a mounting groove 21, and a plurality of (equal to or more than two) magnetic steels 30 can be respectively inserted into the plurality of mounting grooves 21, so as to realize the installation of the magnetic steels 30, ensure the reliable positioning of the magnetic steels 30, effectively avoid the risk of falling of the magnetic steels 30, and can save the rotor punching sheet narrow magnetic bridge structure.

[0038] In addition, as shown in Figures 1-3 along one direction of the circumferential direction of the support 10, the magnetic steel 30 can be inclined towards the support 10, that is, the magnetic steel 30 and the support 10 have an included angle. By adjusting the inclination, the axial flux gap can be non-uniform, the magnetic flux size can be adjusted, the harmonic magnetic field can be weakened, the magnetic field waveform can be improved, the torque pulsation can be smaller, and the axial flux motor can have excellent magnetic field waveform, effectively solving the noise problem of the axial flux motor and effectively improving the NVH effect.

[0039] It should be noted that, for the convenience of description, the "front" and "back" in the present application are based on the orientation relationship shown in the drawings, and not limited to the orientation in the actual application process.

[0040] In some embodiments, along one direction of the circumferential direction of the support 10, the inclination angle of the magnetic steel 30 towards the support 10 can be flexibly adjusted according to actual conditions, so as to realize the elimination of different harmonic magnetic fields, improve the magnetic field waveform, effectively solve the noise problem of the axial flux motor, and improve the NVH effect.

[0041] According to the rotor assembly 100 of the embodiment of the present application, the surface of the iron core 20 away from the axis of the support 10 has a mounting groove 21, and a plurality of magnetic steels 30 are respectively inserted into the plurality of mounting grooves 21, so as to realize the installation of the magnetic steels 30, ensure the reliable positioning of the magnetic steels 30, avoid the risk of falling of the magnetic steels 30, and can save the rotor punching sheet narrow magnetic bridge structure; along one direction of the circumferential direction of the support 10, the magnetic steel 30 is inclined towards the support 10, and by adjusting the inclination, the axial flux gap can be non-uniform, the magnetic flux size can be adjusted, the harmonic magnetic field can be weakened, the magnetic field waveform can be improved, and the noise problem of the axial flux motor can be effectively solved.

[0042] In some embodiments of the present application, as shown in Figures 1-3 along one direction of the circumferential direction of the support 10 (for example, as shown in Figure 3In the clockwise direction shown by the arrow), the inclination directions of the two adjacent magnetic steels 30 are opposite, the axial magnetic flux gap is non-uniform, the magnetic flux can be adjusted, the harmonic magnetic field can be weakened, the magnetic field waveform can be improved, the noise problem of the axial flux motor can be effectively solved, and the NVH effect can be improved.

[0043] In some embodiments, a single magnetic steel 30 can form a level of the rotor assembly 100, or two adjacent magnetic steels 30 can form a level of the rotor assembly 100, which can be set according to actual conditions to meet different setting requirements.

[0044] In the embodiments of the present application, the specific shape of the magnetic steel 30 can be set according to actual conditions, and different magnetic pole effects can be achieved according to different shapes of the magnetic steel 30, the magnetic flux can be adjusted, the performance of different axial flux motors can be achieved, and the noise problem of the axial flux motor can be effectively solved.

[0045] For example, in some embodiments, as shown in Figure 5 The magnetic steel 30 can be circular or elliptical, and by changing the outer contour of the magnetic steel 30, different harmonic magnetic fields can be weakened, the magnetic field waveform can be improved, the noise problem of the axial flux motor can be effectively solved, and the NVH effect can be improved.

[0046] For example, in some embodiments, as shown in Figure 5 The outer contour of the cross section of the magnetic steel 30 perpendicular to the main shaft 200 direction includes an outer arc line 31, an inner arc line 32, a first waist line 33 and a second waist line 34, the outer arc line 31 is located on the radial outer side of the inner arc line 32, the first waist line 33 and the second waist line 34 are spaced apart along the circumferential direction of the main shaft 200, and the outer arc line 31 and the inner arc line 32 are located on the cylindrical surface 40 with the axis of the main shaft 200 as the axis. In the direction from the outer arc line 31 to the inner arc line 32, the first waist line 33 and the second waist line 34 both extend along the radial direction of the cylindrical surface 40, and by changing the outer contour of the magnetic steel 30, different harmonic magnetic fields can be weakened, the magnetic field waveform can be improved, the noise problem of the axial flux motor can be effectively solved, and the NVH effect can be improved.

[0047] Or, as shown in Figure 5As shown, in the direction from the outer arc line 31 to the inner arc line 32, the first waist line 33 deviates from the radial direction of the cylindrical surface 40 towards the second waist line 34, and the second waist line 34 deviates from the radial direction towards the first waist line 33; or, in the direction from the inner arc line 32 to the outer arc line 31, the first waist line 33 and the second waist line 34 deviate from the radial direction towards one side of the circumferential direction of the cylindrical surface 40; or, in the direction from the outer arc line 31 to the inner arc line 32, the first waist line 33 deviates from the radial direction of the cylindrical surface 40 away from the second waist line 34, and the second waist line 34 deviates from the radial direction of the cylindrical surface 40 away from the first waist line 33; or, in the direction from the outer arc line 31 to the inner arc line 32, the middle part of the first waist line 33 and the second waist line 34 are bent towards one side of the circumferential direction of the cylindrical surface 40. By changing the outer contour of the magnetic steel 30, different harmonic magnetic fields can be weakened, the magnetic field waveform can be improved, the noise problem of the axial flux motor can be effectively solved, and the NVH effect can be improved.

[0048] In some embodiments, as shown in Figure 5 The first waist line 33 can include a first folded edge 331 and a second folded edge 332. One end of the first folded edge 331 is connected with the outer arc line 31, and the end of the first folded edge 331 away from the outer arc line 31 is connected with one end of the second folded edge 332. The end of the second folded edge 332 away from the first folded edge 331 is connected with the inner arc line 32. The second waist line 34 can include a third folded edge 341 and a fourth folded edge 342. One end of the third folded edge 341 is connected with the outer arc line 31, and the end of the third folded edge 341 away from the outer arc line 31 is connected with one end of the fourth folded edge 342. The end of the fourth folded edge 342 away from the third folded edge 341 is connected with the inner arc line 32, so as to form the outer contour of the magnetic steel 30.

[0049] In addition, as shown in Figure 5 In one direction of the circumferential direction of the cylindrical surface 40, the inclined directions of the first folded edge 331 and the second folded edge 332 are opposite, and the inclined directions of the third folded edge 341 and the fourth folded edge 342 are opposite. By changing the outer contour of the magnetic steel 30, different harmonic magnetic fields can be weakened, the magnetic field waveform can be improved, the noise problem of the axial flux motor can be effectively solved, and the NVH effect can be improved.

[0050] According to some embodiments of the present application, at least part of the mounting groove 21 can be arranged in the shape of the magnetic steel 30, facilitating the insertion of the magnetic steel 30 into the mounting groove 21, limiting the displacement of the magnetic steel 30 in the mounting groove 21, and improving the positioning accuracy of the magnetic steel 30.

[0051] In some embodiments of the present application, as shown in Figures 1-4As shown, the support 10 is provided with a plurality of (equal to or greater than two) connecting portions 11, and any two adjacent iron cores 20 are provided with a connecting portion 11. The rotor assembly 100 further comprises a plurality of (equal to or greater than two) fixing pieces 50, and the plurality of fixing pieces 50 are connected with the plurality of connecting portions 11 respectively. The fixing piece 50 can abut against the side of at least one of the two magnetic steels 30 adjacent to the connecting portion 11 provided with the fixing piece 50 and away from the main shaft 200. Thus, the fixing piece 50 can limit the at least one magnetic steel 30 to avoid the magnetic steel 30 from being pulled out of the mounting groove 21, ensure the reliable fixation of the magnetic steel 30 in the mounting groove 21, effectively enhance the mechanical strength of the rotor assembly 100, ensure the high structural strength of the rotor assembly 100, and be beneficial to achieving the high speed of the axial flux motor. For example, the speed of the axial flux motor can reach 30,000 rpm or more.

[0052] In addition, the connecting portion 11 can be a non-magnetic conductive material piece, and the fixing piece 50 can also be a non-magnetic conductive material piece, which can effectively avoid the problem of magnetic leakage and ensure the reliable operation of the axial flux motor.

[0053] In some embodiments, as shown, Figures 1-3 The fixing piece 50 and the connecting portion 11 can be connected by a fastener 60, which can ensure the reliable connection of the fixing piece 50 and the connecting portion 11, effectively enhance the mechanical strength of the rotor assembly 100, facilitate disassembly, maintenance and replacement, and be beneficial to improving the assembly efficiency of the rotor assembly 100. For example, the fastener 60 can be a screw.

[0054] According to some embodiments of the present application, the support 10 can be a magnetic conductive material piece, and the iron core 20 can also be a magnetic conductive material piece. The magnetic conductive material piece facilitates the magnetic conduction of the magnetic steel 30 and is beneficial to improving the speed of the axial flux motor.

[0055] In some embodiments, the support 10 and the iron core 20 can be made of the same material, which is beneficial to reducing the production cost.

[0056] In some embodiments of the present application, the surface of the iron core 20 away from the support 10 can be provided with a layer of powder metallurgy material. The magnetic permeability of the layer of powder metallurgy material is different from that of the support 10, which can further improve the air gap magnetic flux strength, reduce the magnetic slot torque, improve the noise, reduce the iron loss, and be beneficial to improving the speed of the axial flux motor.

[0057] The axial flux motor according to the embodiments of the present application comprises a main shaft 200, a stator assembly 300 and a rotor assembly 100. The rotor assembly 100 is the rotor assembly 100 according to the above-mentioned embodiments of the present application. The rotor assembly 100 can realize the non-uniformity of the axial flux air gap, adjust the magnetic flux size, weaken the harmonic magnetic field, improve the magnetic field waveform, and effectively solve the noise problem of the axial flux motor.

[0058] Specifically, the stator assembly 300 is sleeved on the main shaft 200, the rotor assembly 100 is sleeved on the main shaft 200, the support 10 is connected with the main shaft 200, the rotor assembly 100 is located at one axial side of the stator assembly 300, and the air gap 400 is formed between the stator assembly 300 and the rotor assembly 100. Thus, when the axial flux motor works, the rotor assembly 100 can move under the action of the magnetic force, so that the rotor assembly 100 can drive the main shaft 200 to rotate through the support 10, and the power output of the axial flux motor is realized. Compared with the radial flux motor, the axial flux motor of the embodiment of the present application has the advantages of large power, high power density, large torque, etc., and the axial flux motor has a compact structure and a short axial length, which is beneficial to reducing the occupied space.

[0059] Since the rotor assembly 100 according to the embodiment of the present application has the above beneficial technical effects, the axial flux motor according to the embodiment of the present application can realize the installation of the magnetic steel 30 by the surface of the iron core 20 away from the axis of the support 10 having the installation slot 21, and the plurality of magnetic steels 30 are respectively inserted into the plurality of installation slots 21, which can ensure the reliable positioning of the magnetic steel 30 and avoid the risk of the magnetic steel 30 falling off, and the rotor lamination narrow part magnetic bridge structure can be omitted; by tilting the magnetic steel 30 towards the support 10 along one of the circumferential directions of the support 10, the non-uniformity of the axial flux air gap can be realized by adjusting the inclination, the size of the magnetic flux can be adjusted, the harmonic magnetic field can be weakened, the magnetic field waveform can be improved, and the noise problem of the axial flux motor can be effectively solved.

[0060] In some embodiments of the present application, as shown in Figure 1 and Figure 2 shown, the rotor assembly 100 can be two, and the two rotor assemblies 100 are respectively located at two axial sides (for example, the front-rear direction shown in Figure 1 ) of the stator assembly 300, and the air gap 400 is respectively formed between the stator assembly 300 and the two rotor assemblies 100, and the axial magnetic pull generated by the two air gaps 400 can be mutually offset, effectively solving the problem of unbalanced axial force, ensuring the balance of the axial force, and making the axial flux motor work reliably and accurately.

[0061] The rotor assembly 100 according to the embodiment of the present application and other components and operations of the axial flux motor are known to those skilled in the art, and will not be described in detail here.

[0062] In the description of the application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0063] In the description of the present application, the description of the terms "embodiment", "specific embodiment", "example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A rotor assembly for an axial flux motor, characterized in that, include: A bracket, which surrounds and is fixed to the main shaft of the axial flux motor; Multiple iron cores are disposed on one side of the bracket in the axial direction and spaced apart in the circumferential direction of the bracket, and the surface of each iron core away from the axis of the bracket has a mounting groove. Multiple magnets are inserted into multiple mounting slots, and the magnets are inclined toward the bracket in one of the directions of the bracket's circumferential direction. The bracket is made of a magnetic material, and the iron core is made of a magnetic material. The surface of the iron core away from the bracket is provided with a powder metallurgy material layer, and the magnetic permeability of the powder metallurgy material layer is different from that of the bracket.

2. The rotor assembly for an axial flux motor according to claim 1, characterized in that, Along one of the directions of the circumferential direction of the support, the tilt directions of two adjacent magnets are opposite.

3. The rotor assembly for an axial flux motor according to claim 1, characterized in that, The magnet is round or elliptical.

4. The rotor assembly for an axial flux motor according to claim 1, characterized in that, The outer contour of the magnet in a cross-section perpendicular to the main axis includes an outer arc, an inner arc, a first waistline, and a second waistline. The outer arc is located radially outside the inner arc. The first waistline and the second waistline are spaced apart along the circumferential direction of the main axis. The outer arc and the inner arc are located on a cylindrical surface with the axis of the main axis as the axis. In the direction from the outer arc to the inner arc, both the first waistline and the second waistline extend along the radial direction of the cylindrical surface; Alternatively, in the direction from the outer arc to the inner arc, the first waistline deviates from the radial direction of the cylindrical surface toward the second waistline, and the second waistline deviates from the radial direction of the first waistline; Alternatively, in the direction from the inner arc to the outer arc, the first waistline and the second waistline deviate radially from the circumferential side of the cylindrical surface; Alternatively, in the direction from the outer arc to the inner arc, the first waistline is away from the second waistline and deviates from the radial direction of the cylindrical surface, and the second waistline is away from the first waistline and deviates from the radial direction of the cylindrical surface; Alternatively, in the direction from the outer arc to the inner arc, the middle portion of the first waistline and the second waistline bends toward the circumferential side of the cylindrical surface.

5. The rotor assembly for an axial flux motor according to claim 3 or 4, characterized in that, At least a portion of the mounting groove is conformally arranged to the magnet.

6. The rotor assembly for an axial flux motor according to claim 1, characterized in that, The support frame is provided with multiple connecting parts, and a connecting part is provided between any two adjacent iron cores. The connecting parts are made of non-magnetic materials. The rotor assembly also includes: Multiple fixing plates, each being made of a non-magnetic material, are connected to multiple connecting portions respectively. Each fixing plate abuts against at least one of two magnets adjacent to the connecting portion where the fixing plate is located, on the side away from the main shaft.

7. An axial flux motor, characterized in that, include: spindle; A stator assembly, which is loosely fitted onto the main shaft; According to any one of claims 1-6, the rotor assembly for an axial flux motor is sleeved on the main shaft, the bracket is connected to the main shaft, the rotor assembly is located on the axial side of the stator assembly, and an air gap is formed between the stator assembly and the rotor assembly.

8. The axial flux motor according to claim 7, characterized in that, There are two rotor assemblies, which are located on opposite sides of the stator assembly along the axial direction, and air gaps are formed between the stator assembly and the two rotor assemblies.

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