Stator structure and axial flux permanent magnet motor

Abstract

The present invention discloses a stator structure and an axial flux permanent magnet motor. The stator structure for the axial flux permanent magnet motor includes a yoke structure and a plurality of tooth structures. The yoke structure includes a first silicon steel sheet stacked together in the axial direction, and the yoke structure is provided with a plurality of mounting grooves; each tooth structure includes a second silicon steel sheet stacked together in the radial direction, and each tooth structure is inserted into the mounting groove; during installation, the plurality of tooth structures are respectively inserted into the mounting grooves and then fixed together. The present invention aims to solve the problem that the stator core of the prior art axial flux permanent magnet motor is made by winding the first silicon steel sheet, and the winding causes the first silicon steel sheet to be subjected to bending stress all the time, which causes the performance of the first silicon steel sheet to deteriorate.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator structure and an axial flux permanent magnet motor. Background Art

[0002] Axial flux permanent magnet motor is a new type of motor, also known as diameter flux motor, which is a permanent magnet synchronous motor with the axial flux direction of the inner and outer rotors perpendicular to the rotation axis. The inner and outer rotors of the axial flux motor are composed of several superimposed cores and coils, and work in a flux channel with high flux density.

[0003] However, the stator core of the axial flux permanent magnet motor is made by winding the first silicon steel sheet. The winding causes the first silicon steel sheet to be subjected to bending stress all the time, which may cause the performance of the first silicon steel sheet to deteriorate.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a stator structure and an axial flux permanent magnet motor, aiming to solve the problem that the stator core of the prior art axial flux permanent magnet motor is made of a first silicon steel sheet wound, and the winding will cause the first silicon steel sheet to be constantly subjected to bending stress, which will cause the performance of the first silicon steel sheet to deteriorate.

[0006] To achieve the above object, the present invention provides a stator structure for an axial flux permanent magnet motor, comprising:

[0007] A yoke structure, comprising first silicon steel sheets laminated together in the axial direction, wherein a plurality of mounting grooves are formed on the yoke structure; and

[0008] A plurality of tooth structures, each tooth structure comprising second silicon steel sheets radially laminated together, each tooth structure being inserted into the mounting groove;

[0009] During installation, the plurality of tooth structures are respectively inserted into the installation grooves and then fixed together.

[0010] Preferably, in the stator structure for the axial flux permanent magnet motor, the mounting groove extends axially, one of the side walls of the mounting groove and the side walls of the tooth structure is provided with a concave-convex structure, and the other is provided with a matching structure, and when the tooth structure is inserted into the mounting groove, the concave-convex structure and the matching structure are plug-fitted in the axial direction.

[0011] Preferably, in the stator structure for the axial flux permanent magnet motor, the slot wall of the mounting slot is provided with a concave-convex structure, and the concave-convex structure does not exceed the slot wall surface of the mounting slot;

[0012] During installation, the protruding structure of the concave-convex structure does not extend into the tooth structure.

[0013] Preferably, in the stator structure for the axial flux permanent magnet motor, a first threaded hole is provided at a position where the inner and outer diameters of the yoke structure exceed the inner and outer diameters of the tooth structure.

[0014] Preferably, in the stator structure for the axial flux permanent magnet motor, the mounting slot is located in the middle of the corresponding tooth structure; the mounting slot extends radially, and the width of the slot opening of the mounting slot along the circumferential direction is smaller than the width of the inner portion of the mounting slot along the circumferential direction;

[0015] A plug-in structure is provided at the bottom of each tooth structure, and the plug-in structure is radially inserted into the installation groove.

[0016] Preferably, in the stator structure for the axial flux permanent magnet motor, the outer surface of the plug-in structure is tightly matched with the inner wall of the mounting groove.

[0017] Preferably, in the stator structure for the axial flux permanent magnet motor, the depth of the mounting groove is less than half of the thickness of the yoke structure along the axial direction.

[0018] Preferably, in the stator structure for the axial flux permanent magnet motor, one end of the mounting slot inward in the radial direction is not completely through and is formed with a stop portion, and the other end is completely through;

[0019] During installation, the plug-in structure is inserted from the other end of the installation slot and abuts against the abutting portion.

[0020] Preferably, in the stator structure for the axial flux permanent magnet motor, the width of the mounting groove along the circumferential direction is gradually reduced toward the outside along the axial direction.

[0021] Preferably, in the stator structure for the axial flux permanent magnet motor, the yoke structure and the tooth structure are penetrated by second threaded holes, and the second threaded holes are evenly distributed between the inner and outer diameters of the yoke structure and the tooth structure.

[0022] In order to achieve the above object, the present invention further provides an axial flux permanent magnet motor, which includes the above stator structure for the axial flux permanent magnet motor.

[0023] The present invention has at least the following beneficial effects:

[0024] The stator structure for an axial flux permanent magnet motor provided by the present invention comprises a first silicon steel sheet stacked together in the axial direction through a yoke structure, the yoke structure is provided with a plurality of mounting grooves, each tooth structure comprises a second silicon steel sheet stacked together in the radial direction, and each tooth structure is inserted into the mounting groove, so that the tooth structure and the yoke structure are arranged separately, and the tooth structure and the yoke structure adopt this lamination method, which can effectively avoid the influence of bending stress caused by a traditional wound iron core.

[0025] Furthermore, the mounting groove is located in the middle of the corresponding tooth structure; the outer surface of the plug-in structure is tightly matched with the inner wall of the mounting groove. Since the normal motor magnetic circuit goes down in the middle of the tooth structure, the magnetic circuit moves to both sides at the middle junction of the tooth structure and the yoke structure, and the bifurcated area formed in the middle is the low magnetic density area. The present invention has a small impact on the motor performance by placing the mounting groove and the plug-in structure in the middle of the tooth structure; in addition, the mounting groove cooperates with the plug-in structure in the middle position to further reduce the eddy current circuit in the tooth structure laminations and reduce the eddy current loss of the core.

[0026] Furthermore, the present invention sets the tooth structure and the yoke structure separately, each tooth structure is installed on the yoke structure, and the lamination method is adopted in combination with the tooth structure and the yoke structure, so that the stator structure as a whole will not be affected by bending stress. In addition, the tooth structure and the yoke structure are set separately, and the connection between the tooth structure and the yoke structure is more flexible and more adaptable.

[0027] Furthermore, the present invention can facilitate the insertion of the coil by separately arranging the tooth structure and the yoke structure.

[0028] Furthermore, the present invention provides a tooth structure and a yoke structure separately, the tooth structure can be provided to overlap in the radial direction, and there can be multiple connection positions between the tooth structure and the yoke structure, for example, they can be connected on the side wall of the tooth structure or on the bottom. There can also be multiple ways to connect the tooth structure and the yoke structure, for example, a concave-convex structure is provided on the side wall of the tooth structure or a plug-in structure is provided on the bottom of the tooth structure, and the specific form of the plug-in structure or the concave-convex structure can also be provided as required, which is relatively flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a conventional stator structure in the prior art;

[0030] Figure 2 It is a schematic diagram of the motor magnetic circuit;

[0031] Figure 3 It is a schematic diagram of a first embodiment of a stator structure for an axial flux permanent magnet motor according to the present invention;

[0032] Figure 4for Figure 3 Schematic diagram of the structure of the middle yoke;

[0033] Figure 5 for Figure 4 A schematic diagram of the middle yoke structure at a viewing angle;

[0034] Figure 6 for Figure 4 A schematic diagram of the middle yoke structure from another viewing angle;

[0035] Figure 7 Figure 6 A cross-sectional view of the middle structure;

[0036] Figure 8 for Figure 3 Schematic diagram of the structure of the middle tooth;

[0037] Fig. 9 for Figure 1 The punching and coiling method of conventional wound core;

[0038] Fig.10 The punching method provided by the present invention;

[0039] Fig.11 To adopt Fig.10 Single-piece lamination of punched sheets;

[0040] Fig.12 It is a schematic diagram of a second embodiment of the stator structure for an axial flux permanent magnet motor according to the present invention;

[0041] Fig.13 for Fig.12 A schematic diagram of the middle yoke structure at a viewing angle;

[0042] Fig.14 for Fig.12 A schematic diagram of an embodiment of a middle gear structure;

[0043] Fig.15 for Fig.12 Schematic diagram of another embodiment of a stator structure for an axial flux permanent magnet motor.

[0044] Reference numerals of the prior art:

[0045] Label name Label name 100’ Stator structure for axial flux permanent magnet motor

[0046] Reference numerals of the present invention:

[0047] Label name Label name 100 Stator structure for axial flux permanent magnet motor 13 First threaded hole 1 Yoke structure 2 Tooth structure 11 Low magnetic density area 21 Matching structure 12 Mounting slot 21a The second zigzag structure 121 Concave and convex structure 22 Plug-in structure 121a The first zigzag structure 3 Second threaded hole

[0048] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0050] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0051] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0052] In the embodiments of the present invention, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0053] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0054] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, it can be understood by those skilled in the art that in the embodiments of the present invention, many technical details are proposed in order to enable the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present invention can also be implemented. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present invention. The various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0055] The present invention provides a stator structure for an axial flux permanent magnet motor. Figure 3 and Fig.12 As shown, the stator structure 100 for the axial flux permanent magnet motor includes a yoke structure 1 and a plurality of tooth structures 2 . The plurality of tooth structures 2 are connected to the yoke structure 1 , and tooth slots are formed between two adjacent tooth structures 2 .

[0056] Figure 1Schematically shows a conventional stator structure 100' in the prior art. Figure 1 The conventional stator structure 100 ′ is formed by winding silicon steel sheets. The winding causes the silicon steel sheets to be subjected to bending stress all the time, which may cause the performance of the silicon steel sheets to deteriorate.

[0057] In the present invention, the yoke structure 1 includes a first silicon steel sheet stacked together in the axial direction, and a plurality of mounting grooves 12 are penetrated on the yoke structure 1. Each tooth structure 2 includes a second silicon steel sheet stacked together in the radial direction, and each tooth structure 2 is inserted into the mounting groove 12. In this way, the tooth structure 2 and the yoke structure 1 are separately arranged, and the tooth structure 2 and the yoke structure 1 adopt this lamination method, which can effectively avoid the influence of bending stress caused by the traditional wound iron core.

[0058] Figure 2 A schematic diagram of the motor magnetic circuit is shown. Figure 2 The magnetic circuit will be separated toward both sides of the yoke at the bottom of the tooth. In the present invention, the tooth structure 2 is a second silicon steel sheet radially stacked together, and the yoke structure 1 is a first silicon steel sheet axially stacked together. In this way, each first silicon steel sheet is equivalent to cutting off the eddy current circuit, and each second silicon steel sheet is also equivalent to cutting off the eddy current circuit, so that the influence of bending stress caused by the traditional wound iron core can be avoided.

[0059] Figures 3 to 10 FIG. 1 is a schematic diagram of a first embodiment of a stator structure 100 for an axial flux permanent magnet motor according to the present invention. Figure 3 As shown, the mounting groove 12 extends axially, one of the side walls of the mounting groove 12 and the side walls of the tooth structure 2 is provided with a concave-convex structure 121, and the other is provided with a matching structure 21. When the tooth structure 2 is inserted into the mounting groove 12, the concave-convex structure 121 and the matching structure 21 are plugged and matched along the axial direction.

[0060] The cross-sectional shape of the matching structure 21 can be set as required, for example, the matching structure 21 can be a concave arc groove, a concave-convex arc groove, a square groove, etc.; correspondingly, the shape of the concave-convex structure 121 matches the shape of the matching structure 21. In this embodiment, the matching structure 21 is a sawtooth groove, and correspondingly, the concave-convex structure 121 has a sawtooth convex portion. The size of each sawtooth structure of the sawtooth groove can be the same or different, which can be set specifically as required.

[0061] It should be noted that when the concave-convex structure 121 is set on the groove wall of the installation groove 12, the concave-convex structure 121 should not exceed the groove wall surface of the installation groove 12, that is, when the tooth structure 2 is installed in the installation groove 12, the protruding structure in the concave-convex structure 121 cannot extend into the tooth structure 2.

[0062] The protruding structure in the concave-convex structure 121 on the mounting groove 12 cannot exceed the groove wall of the mounting groove 12 when the concave-convex structure 121 is not provided on the mounting groove 12. The groove wall of the mounting groove 12 is the first sawtooth structure 121a, and the side wall of the tooth structure 2 is provided with a second sawtooth structure 21a matching the first sawtooth structure 121a. Figure 8 FIG. 1 shows a schematic diagram of a yoke structure 1 without a concave-convex structure 121. Figure 5 and Figure 8 , Figure 5 The protruding structure in the first sawtooth structure 121a cannot exceed Figure 8 The groove wall of the middle mounting groove 12. Since the yoke structure 1 is axially laminated and the tooth structure 2 is radially laminated, assuming that the protruding structure of the first serrated structure 121a exceeds the groove wall of the mounting groove 12, it is equivalent to that a part of the yoke structure 1 is inserted into the tooth structure 2, which will affect the magnetic circuit of the laminate, resulting in very poor magnetic properties of the laminate surface.

[0063] When the tooth structure 2 is inserted into the mounting groove 12, a concave-convex structure 121 and a matching structure 21 are arranged on the groove wall of the mounting groove 12 and the wall surface of the tooth structure 2 for plug-in cooperation. In this way, the contact area between the laminated silicon steel sheets of the yoke structure 1 and the laminated silicon steel sheets of the tooth structure 2 can be increased, providing a certain friction resistance and preventing the tooth structure 2 from being displaced due to axial force.

[0064] It should be noted that after the tooth structure 2 is inserted into the installation groove 12, the splicing position can be fixed by gluing, welding or other fixing methods. The overlap between the axial laminations of the yoke structure 1 can be fixed by high temperature curing, riveting, gluing or welding of self-adhesive silicon steel sheets. Similarly, the overlap between the radial laminations of the tooth structure 2 can be fixed by high temperature curing, riveting, gluing or welding of self-adhesive silicon steel sheets.

[0065] In addition, in this structural mode, the inner and outer diameters of the yoke structure 1 can be set to exceed the inner and outer diameters of the tooth structure 2. Since the position exceeding the inner and outer diameters of the tooth structure 2 does not participate in the motor magnetic circuit and has no effect on the motor performance, a threaded hole can be set at this position to fix the stator structure 100, that is, the first threaded hole 13 can be set at the position where the inner and outer diameters of the yoke structure 1 exceed the inner and outer diameters of the tooth structure 2. More specifically, the first threaded hole 13 can be set at the position where the inner diameter of the yoke structure 1 exceeds the inner diameter of the tooth structure 2, or the first threaded hole 13 can be set at the position where the outer diameter of the yoke structure 1 exceeds the outer diameter of the tooth structure 2, and it can be set specifically according to needs.

[0066] The present invention adopts the tooth and yoke lamination method to avoid the bending stress caused by the traditional winding core. The axial friction force is increased by splicing the concave-convex structure 121 and the matching structure 21 to prevent the tooth from being displaced by the axial force.

[0067] Fig. 9 Indicated Figure 1 Conventional winding methods for winding cores, such as Fig. 9 As shown in the figure, the stamping direction of the conventional wound core is the rolling direction of the silicon steel sheet. The magnetic properties of the silicon steel sheet are best in the rolling direction, and worst in the direction perpendicular to the rolling direction. The magnetic properties in the two directions differ by about 10%. Fig. 9 During conventional winding, the magnetic circuit direction of the tooth structure is perpendicular to the rolling direction, and the magnetic properties in this direction are the worst. The magnetic circuit direction of the yoke structure is parallel to the rolling direction, and the magnetic properties are the best. However, for axial flux permanent magnet motors, the tooth structure accounts for a larger proportion.

[0068] In order to reduce the loss of the stator structure 100, the stator structure 100 is divided into blocks, and the stator structure 100 punching sheets can be used. Fig.10 In the manner shown, the magnetic circuit direction of the tooth structure 2 is parallel to the rolling direction of the silicon steel sheet, and the yoke structure 1 is changed to be perpendicular to the rolling direction for punching. Fig.11 shown.

[0069] Similarly, as long as the stator structure is divided into 100 blocks, the rolling direction of the silicon steel sheet can correspond to the direction of the magnetic circuit in the teeth or yoke, and the direction with the best magnetic properties of the silicon steel sheet can be used to reduce the stator core loss.

[0070] Figure 12 to Figure 14 Schematic diagram of a second embodiment of a stator structure 100 for an axial flux permanent magnet motor according to the present invention. Figure 12 to Figure 14 The mounting groove 12 is located in the middle position of the corresponding tooth structure 2; the mounting groove 12 extends radially, and the width of the groove opening of the mounting groove 12 along the circumferential direction is smaller than the width of the inner side of the mounting groove 12 along the circumferential direction; a plug-in structure 22 is provided at the bottom of each tooth structure 2, and the plug-in structure 22 is inserted into the mounting groove 12 along the radial direction.

[0071] During installation, the plug-in structure 22 of each tooth structure 2 is radially inserted into the corresponding installation groove 12. The splicing position can be fixed by glue, welding or other fixing methods.

[0072] More specifically, the mounting groove 12 is located in the middle of the corresponding tooth structure 2; the outer surface of the plug-in structure 22 is tightly matched with the inner wall of the mounting groove 12. Figure 2 , the normal motor magnetic circuit goes down in the middle of the tooth structure 2, and moves to both sides at the middle junction of the tooth structure 2 and the yoke structure 1. The bifurcated area formed in the middle is the low magnetic density area 11. The matching position of the mounting groove 12 and the plug-in structure 22 is in the middle position of the tooth structure 2, which has little effect on the motor performance; in addition, the matching of the mounting groove 12 and the plug-in structure 22 in the middle position helps to further reduce the eddy current circuit in the lamination of the tooth structure 2 and reduce the eddy current loss of the core.

[0073] More specifically, although the middle position of the tooth structure 2 has a relatively small effect on the magnetic circuit, part of the magnetic circuit needs to pass through this part, and if the mounting groove 12 is set too large, it will affect the magnetic circuit. The outer surface of the plug-in structure 22 is tightly matched with the inner wall of the mounting groove 12, which can reduce the splicing gap. The smaller the splicing gap, the smaller the air gap.

[0074] It should be noted that the middle position of the tooth structure 2 in the present invention refers to the position of the center line of each tooth structure 2 , which extends in the axial direction, rather than the approximate middle position of each tooth structure 2 .

[0075] Under the condition of ensuring strength, the mounting slot 12 needs to be set as small as possible, so as to reduce the splicing area between the tooth structure 2 and the mounting slot 12 and reduce the impact on the motor performance. More specifically, under the condition of ensuring strength, the slot width of the mounting slot 12 needs to be set as narrow as possible.

[0076] Considering the overall strength of the yoke structure 1 and the small width of the yoke structure 1 itself, the depth of the mounting groove 12 is less than half of the thickness of the yoke structure 1 along the axial direction.

[0077] The cross-sectional shape of the mounting groove 12 can be various, as long as the width of the notch of the mounting groove 12 along the circumferential direction is smaller than the width of the inner side of the mounting groove 12 along the circumferential direction, so that the plug-in structure 22 of each tooth structure 2 will not fall out after being inserted into the corresponding mounting groove 12 along the radial direction. In this embodiment, the mounting groove 12 can be set as a dovetail groove. In other embodiments, it can also be set as an arc groove. When setting a specific shape, it is also necessary to be as small as possible close to the splicing area, so that the air gap can be reduced. In order to facilitate installation, the width of the mounting groove 12 along the circumferential direction is set to gradually decrease along the axial direction outward.

[0078] In addition, in order to facilitate accurate assembly and positioning, one end of the installation groove 12 in the radial direction is not completely penetrated and is formed with a stop portion, and the other end is completely penetrated; during installation, the plug-in structure 22 is inserted from the other end of the installation groove 12 and abuts against the stop portion. The stop portion is provided, which is equivalent to forming a limiting structure, which is convenient for positioning, and abutting against the stop portion during installation indicates that the installation is in place.

[0079] like Fig.15 As shown, for the convenience of assembly, the yoke structure 1 and the tooth structure 2 are provided with second threaded holes 3, and the second threaded holes 3 are evenly distributed between the inner and outer diameters of the yoke structure 1 and the tooth structure 2. That is, the second threaded holes 3 are evenly distributed in the area between the inner and outer diameters of the yoke structure 1 and the tooth structure 2, so that the force can be evenly applied.

[0080] The present invention sets the tooth structure 2 and the yoke structure 1 separately, each tooth structure 2 is installed on the yoke structure 1, and the above-mentioned lamination method is adopted in combination with the tooth structure 2 and the yoke structure 1, so that the stator structure 100 as a whole will not be subjected to bending stress. In addition, the tooth structure 2 and the yoke structure 1 are set separately, and the connection between the tooth structure 2 and the yoke structure 1 is more flexible, more adaptable, and more convenient in processing. Figure 3 and Figure 4 As shown, the tooth structure 2 can be connected to the yoke structure 1 at the side wall; Fig.12 As shown, the tooth structure 2 can be connected to the yoke structure 1 at its bottom, so that the coil can be inserted more conveniently, and the coil can be inserted directly without inserting it one by one.

[0081] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the present invention.

Claims

1. A stator structure for an axial flux permanent magnet motor, characterized in that: include: The yoke structure comprises first silicon steel sheets laminated together along the axial direction, and the yoke structure is provided with a plurality of mounting grooves; as well as, A plurality of tooth structures, each tooth structure comprising second silicon steel sheets radially laminated together, each tooth structure being inserted into the mounting groove; During installation, the plurality of tooth structures are respectively inserted into the installation grooves and then fixed together.

2. The stator structure for an axial flux permanent magnet motor according to claim 1, characterized in that: The mounting groove extends axially, one of the side walls of the mounting groove and the side walls of the tooth structure is provided with a concave-convex structure, and the other is provided with a matching structure. When the tooth structure is inserted into the mounting groove, the concave-convex structure and the matching structure are plugged and matched along the axial direction.

3. The stator structure for an axial flux permanent magnet motor according to claim 2, characterized in that: The groove wall of the installation groove is provided with a concave-convex structure, and the concave-convex structure does not exceed the groove wall surface of the installation groove; During installation, the protruding structure of the concave-convex structure does not extend into the tooth structure.

4. The stator structure for an axial flux permanent magnet motor according to claim 2, characterized in that: A first threaded hole is arranged at a position where the inner and outer diameters of the yoke structure exceed the inner and outer diameters of the tooth structure.

5. The stator structure for an axial flux permanent magnet motor according to claim 1, characterized in that: The mounting groove is located at the middle position of the corresponding tooth structure, the mounting groove extends in the radial direction, and the width of the notch of the mounting groove in the circumferential direction is smaller than the width of the inner side of the mounting groove in the circumferential direction; A plug-in structure is provided at the bottom of each tooth structure, and the plug-in structure is radially inserted into the installation groove.

6. The stator structure for an axial flux permanent magnet motor according to claim 5, characterized in that: The outer surface of the plug-in structure is tightly matched with the inner wall of the installation groove.

7. The stator structure for an axial flux permanent magnet motor according to claim 6, characterized in that: The depth of the mounting groove is less than half of the thickness of the yoke structure along the axial direction.

8. The stator structure for an axial flux permanent magnet motor according to claim 5, characterized in that: One end of the installation groove inward in the radial direction is not completely through and is formed with a stop portion, and the other end is completely through; During installation, the plug-in structure is inserted from the other end of the installation slot and abuts against the abutting portion.

9. The stator structure for an axial flux permanent magnet motor according to claim 5, characterized in that: The yoke structure and the tooth structure are penetrated with second threaded holes, and the second threaded holes are evenly distributed between the inner and outer diameters of the yoke structure and the tooth structure.

10. An axial flux permanent magnet motor, characterized in that: The invention comprises a stator structure for an axial flux permanent magnet motor according to any one of claims 1 to 9.

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