Stator of axial magnetic flux motor, axial magnetic flux motor and wind wheel assembly

Abstract

The invention discloses a stator of an axial flux motor, the axial flux motor and a wind wheel assembly. A stator of the axial flux motor includes a yoke and stator teeth. The yoke part is annularly arranged. The stator teeth protrude out of the surface of the yoke part in the axial direction of the yoke part, the number of the stator teeth is multiple, the multiple stator teeth are arranged at intervals in the circumferential direction of the yoke part and form a winding groove in a surrounding mode, and in the same stator tooth, the stator tooth comprises a first tooth section located on the inner side of the yoke part and a second tooth section located on the outer side of the yoke part; in the direction from the inner side of the yoke part to the outer side of the yoke part, the width of the first tooth section in the width direction of the stator teeth is increased; and the width of the second tooth section in the width direction of the stator teeth is not changed. The axial magnetic flux motor solves the problem that an axial magnetic flux motor is large in vibration noise.

Description

Technical Field

[0001] The present application relates to the technical field of drive devices, and in particular to a stator of an axial flux motor, an axial flux motor and a wind wheel assembly. Background Art

[0002] In the prior art, permanent magnet motors for air conditioner fans often use built-in rotor structures to reduce the axial size of the permanent magnet motor, thereby reducing the area occupied by the permanent magnet motor. However, the cogging torque and torque pulsation inside the permanent magnet motor using the built-in rotor structure are relatively large, resulting in vibration and high noise in the permanent magnet motor. Summary of the invention

[0003] The main purpose of the present application is to provide a stator of an axial flux motor, an axial flux motor and a wind wheel assembly to solve the problem of high vibration and noise of the permanent magnet motor mentioned in the background technology.

[0004] According to one aspect of the present application, a stator of an axial flux motor is provided, comprising:

[0005] A yoke, wherein the yoke is arranged in a ring shape;

[0006] stator teeth, the stator teeth protrude from the surface of the yoke portion along the axial direction of the yoke portion, the stator teeth include a plurality of stator teeth, the plurality of stator teeth are arranged at intervals along the circumferential direction of the yoke portion and surround to form winding slots, and the same stator tooth includes a first tooth segment located on the inner side of the yoke portion and a second tooth segment located on the outer side of the yoke portion;

[0007] Wherein, along the direction from the inner side of the yoke to the outer side of the yoke, the width of the first tooth segment along the width direction of the stator tooth becomes wider; and the width of the second tooth segment along the width direction of the stator tooth remains unchanged.

[0008] Further, in the same stator tooth, along the radial direction of the yoke, the ratio of the length of the second tooth segment to the length of the stator tooth is 1 / 4 to 4 / 7.

[0009] Furthermore, a flange extending along the width direction of the stator tooth is provided at the end of the stator tooth away from the yoke, and multiple flanges in the same stator tooth form a pole shoe, and the width of the pole shoe along the width direction of the stator tooth widens from the inner side of the yoke to the outer side of the yoke.

[0010] Furthermore, the distance between two adjacent pole shoes remains unchanged from the inner side of the yoke to the outer side of the yoke.

[0011] Further, the flange includes a first flange portion and a second flange portion, the first flange portion and the second flange portion are respectively arranged on opposite sides of the stator tooth along the width direction, and the width of the first flange portion along the width direction of the stator tooth is greater than the width of the second flange portion along the width direction of the stator tooth.

[0012] Furthermore, on two adjacent stator teeth, the first flange portion on a first stator tooth is arranged adjacent to the second flange portion on the other stator tooth.

[0013] Furthermore, an insert block is provided on one of the end of the stator tooth close to the yoke and the yoke, and a slot matched with the insert block is provided on the other.

[0014] Furthermore, the stator teeth are an integrally formed structure; and / or each of the stator teeth includes a plurality of tooth punching sheets, and the plurality of tooth punching sheets are stacked along the radial direction of the yoke.

[0015] Furthermore, it also includes a plastic packaging body and a winding, wherein the winding is wound around the stator teeth, and the plastic packaging body is coated on the outer surface of the structure formed by the stator teeth, the yoke and the winding.

[0016] On the other hand, the present application also provides an axial flux motor, which includes a rotor assembly and the stator of the axial flux motor described in any of the above technical solutions, the rotor assembly includes a rotor core and a rotating shaft, the rotor core and the stator of the axial flux motor are axially arranged opposite to each other, and the rotating shaft passes through the rotor core and the stator of the axial flux motor.

[0017] On the other hand, the present application also provides a wind wheel assembly, which includes an impeller and the axial flux motor described in the above technical solution, and the axial flux motor is drivingly connected to the impeller.

[0018] In the present application, the width of the stator teeth located on the inner side of the yoke is widened to make the transition of the magnetic flux path smoother, which can reduce the concentration and distortion of the magnetic flux at the edge of the tooth, ensure that the change of the magnetic flux is more uniform, and help reduce the tooth torque and torque pulsation, thereby reducing the vibration and noise generated by the axial flux motor. The width of the stator teeth located on the outer side of the yoke is the same, which can increase the slot width of the winding slot of the axial flux motor and increase the area of ​​the winding slot. Correspondingly, when the winding area in the winding slot remains unchanged, the ratio between the winding area in the winding slot and the winding slot decreases, that is, the slot fill rate decreases. Since an excessively high slot fill rate will increase the vibration and noise of the motor and also cause a high temperature rise problem, therefore, in the present application, the same width of the stator teeth located on the outer side of the yoke is set to reduce the slot fill rate, thereby reducing the temperature rise level of the noise generated by the axial flux motor. At the same time, the present application can also reduce the circumference of the enameled wire, thereby reducing material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 This is a schematic structural diagram of the stator of the axial flux motor disclosed in the present application (I);

[0021] Figure 2 A top view of the stator of the axial flux motor disclosed in the present application (I);

[0022] Figure 3 A top view of the stator teeth disclosed in this application;

[0023] Figure 4 This is a structural schematic diagram of the stator of the axial flux motor disclosed in this application (II);

[0024] Figure 5 A top view of the stator of the axial flux motor disclosed in the present application (II);

[0025] Figure 6 Schematic diagram of the tooth punching sheet disclosed in this application (I);

[0026] Figure 7 Schematic diagram of the tooth punching sheet disclosed in this application (II);

[0027] Figure 8 It is a structural schematic diagram of the yoke disclosed in this application;

[0028] Fig. 9 It is a schematic diagram of the structure of the plastic package disclosed in this application;

[0029] Fig.10It is a structural schematic diagram of the axial flux motor disclosed in this application;

[0030] Fig.11 A cross-sectional view of the axial flux motor disclosed in the present application;

[0031] Fig.12 This is a schematic diagram of the structure of the wind wheel assembly disclosed in this application.

[0032] The above drawings include the following reference numerals:

[0033] 100, stator; 10, yoke; 11, slot; 20, stator teeth; 21, tooth punching; 211, flange; 2111, first flange; 2112, second flange; 22, pole shoe; 23, plug; 30, winding groove; 40, plastic package; 41, first installation cavity; 42, second installation cavity; 43, cover; 200, axial flux motor; 201, rotor assembly; 202, rotor core; 203, rotating shaft; 300, wind wheel assembly; 301, impeller. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] Cogging torque is the circumferential torque generated by the interaction between the permanent magnets and the stator teeth when the motor is not powered. This torque changes with the change of the rotor position, so it is a pulsating torque. The cogging torque is generated by the combined tangential force between the permanent magnets and the stator teeth. The tangential force always tries to align the axis of the permanent magnet magnetic field with the axis of the stator teeth, so that the rotor tends to be positioned at a certain position. When the motor rotor rotates, the permanent magnet causes a large change in the magnetic permeability within a small range of the stator tooth slot, causing a change in the magnetic field energy storage, thereby generating cogging torque. Cogging torque causes torque pulsation in the permanent magnet motor, which in turn causes speed fluctuations. Torque pulsation can also cause vibration and noise in the motor. When the frequency of the pulsating torque is consistent with the resonant frequency of the armature current, resonance will occur, which will amplify the vibration and noise of the cogging torque.

[0038] In order to solve the problem that the cogging torque and torque pulsation inside the existing permanent magnet motor with an internal rotor structure are relatively large, resulting in high vibration and noise in the permanent magnet motor, the present invention provides a stator of an axial flux motor, an axial flux motor and a wind wheel assembly.

[0039] like Figures 1 to 12 As shown, the stator 100 of the axial flux motor includes a yoke 10 and stator teeth 20. The yoke 10 is arranged in an annular shape. The stator teeth 20 protrude from the surface of the yoke 10 along the axial direction of the yoke 10. The stator teeth 20 include a plurality of stator teeth 20, and the plurality of stator teeth 20 are arranged at intervals along the circumferential direction of the yoke 10 and surround to form a winding slot 30. The end of the stator tooth 20 away from the yoke 10 is provided with a flange 211 extending in the width direction of the stator tooth 20, and the plurality of flanges 211 in the same stator tooth 20 form a pole shoe 22.

[0040] Among them, in the same stator tooth 20, at least the width H1 of the part of the stator tooth 20 located inside the yoke 10 widens from the inside of the yoke 10 to the outside of the yoke 10. In the same stator tooth 20, the width H2 of the pole shoe 22 along the width direction of the stator tooth 20 widens from the inside of the yoke 10 to the outside of the yoke 10.

[0041] In this embodiment, by setting the width H1 of some stator teeth 20 in the same stator tooth 20 to widen from the inside of the yoke 10 to the outside of the yoke 10, and setting the width H2 of the pole shoe 22 in the same stator tooth 20 along the width direction of the stator tooth 20 to widen from the inside of the yoke 10 to the outside of the yoke 10, the slot width of the winding slot 30 can be smoothly transitioned from the inside of the yoke 10 to the outside of the yoke 10, thereby reducing the sudden change of magnetic flux caused by the large change of the slot width of the winding slot 30. Such a setting can optimize the distribution of magnetic flux between the stator teeth 20 and the pole shoe 22, ensure that the magnetic flux path is more uniform, and is conducive to reducing the torque generated by the interaction between the permanent magnet and the stator teeth 20 caused by the pulsation of the tangential component of the interaction force between the permanent magnet and the stator teeth 20 in the axial flux motor 200, that is, reducing the cogging torque of the axial flux motor 200. Therefore, the stator 100 of the axial flux motor can reduce the cogging torque of the axial flux motor 200 and the torque pulsation of the axial flux motor 200 caused by the cogging torque, so as to achieve the purpose of reducing the vibration and noise generated by the axial flux motor 200 due to the torque pulsation. Among them, the more uniform distribution of the magnetic flux between the stator teeth 20 and the pole shoes 22 can ensure that the magnetic flux path is more uniform, thereby reducing the possibility of magnetic flux distortion and local saturation, reducing the amplitude of each harmonic of the stator 100 of the axial flux motor, and increasing the frequency of the fundamental wave of the cogging torque, further reducing the vibration and noise generated by the axial flux motor 200. At the same time, the pole shoes 22 can increase the magnetic conductive area and power density of the stator 100 of the axial flux motor, optimize the distribution of the electromagnetic field, and enhance the structural strength of the stator 100 of the axial flux motor, so that the stator 100 of the axial flux motor can more effectively carry and conduct electromagnetic force, reduce the air gap magnetic resistance of the axial flux motor 200, and further help to reduce the noise generated by the axial flux motor 200.

[0042] Furthermore, if Figures 1 to 3As shown, along the direction from the inner side of the yoke 10 to the outer side of the yoke 10, the width of the first tooth segment along the width direction of the stator tooth 20 becomes wider; the width of the second tooth segment along the width direction of the stator tooth 20 remains unchanged. The widening of the width of the first tooth segment along the width direction of the stator tooth 20 makes the transition of the magnetic flux path smoother, which can reduce the concentration and distortion of the magnetic flux at the edge of the tooth, ensure that the change of the magnetic flux is more uniform, and help to reduce the cogging torque and torque pulsation, thereby reducing the vibration and noise generated by the axial flux motor 200. The width of the second tooth segment along the width direction of the stator tooth 20 remains unchanged, which can increase the slot width of the winding slot 30 of the axial flux motor 200, and also increase the area of ​​the winding slot 30. Correspondingly, when the winding area in the winding slot 30 remains unchanged, the ratio between the winding area in the winding slot 30 and the winding slot 30 decreases, that is, the slot full rate decreases. Since an excessively high slot fill rate will increase the vibration and noise of the motor and also cause a high temperature rise problem, in this embodiment, setting the width of the second tooth segment along the width direction of the stator tooth 20 to be constant can reduce the slot fill rate, thereby reducing the temperature rise level of the noise generated by the axial flux motor 200. At the same time, such a setting can also reduce the circumference of the enameled wire, thereby reducing material costs.

[0043] Furthermore, in the same stator tooth, along the radial direction of the yoke, the ratio of the length of the second tooth segment to the length of the stator tooth is 1 / 4 to 4 / 7. For example, the ratio of the length of the second tooth segment to the length of the stator tooth can be set to one of 1 / 4, 1 / 3 or 4 / 7. When the maximum width of the first tooth segment along the radial direction of the yoke 10 increases to a certain value, at this time, the stator tooth 20 can ensure that the magnetic circuit flux density of the axial flux motor is within a reasonable value, which is beneficial to reduce the tooth torque and torque pulsation inside the axial flux motor. Specifically, the range of reasonable values ​​of the magnetic circuit flux density can be obtained by combining simulation and other methods.

[0044] like Figures 4 to 5As shown, further, in the same stator tooth 20, the width H1 of all stator teeth 20 gradually and evenly widens from the inside of the yoke 10 to the outside of the yoke 10. When the width H1 of all stator teeth 20 evenly widens from the inside of the yoke 10 to the outside of the yoke 10, the slot width of the winding slot 30 also changes evenly accordingly. This arrangement can reduce the sudden change of magnetic flux caused by the large change of the slot width of the winding slot 30, which is beneficial to reducing the amplitude of the cogging torque. In this embodiment, the smaller cogging torque can make the axial flux motor 200 more stable during operation, which is beneficial to reducing the vibration and noise generated by the axial flux motor 200. At this time, the width H1 of the stator teeth 20 is uniformly widened from the inside of the yoke 10 to the outside of the yoke 10, which also allows the magnetic flux to be more evenly distributed when passing through the stator teeth 20. The more evenly distributed magnetic flux can reduce the concentration and distortion of the magnetic flux at the edge of the tooth, thereby improving the utilization efficiency of the magnetic flux and reducing the local overheating or saturation caused by the uneven distribution of the magnetic flux. In addition, the uniform widening of the width H1 of all stator teeth 20 is also convenient for design and processing.

[0045] Furthermore, on each stator tooth 20, the spacing H3 between two adjacent pole shoes 22 remains unchanged from the inside of the yoke 10 to the outside of the yoke 10. When the axial flux motor 200 is in operation, the magnetic flux will enter and leave the air gap through the stator teeth 20 and the pole shoes 22 to interact with the permanent magnets to generate electromagnetic force. In this embodiment, the spacing H3 between two adjacent pole shoes 22 remains unchanged, so that a stable magnetic field distribution can be formed between the pole shoes 22, the distribution of the magnetic flux path and the electromagnetic force can be optimized, and the magnetic resistance on the magnetic flux path is relatively stable, which helps to reduce the magnetic flux fluctuation caused by the change of magnetic resistance, and achieves the reduction of vibration and noise of the motor. The spacing H3 between two adjacent pole shoes 22 remains unchanged from the inside of the yoke 10 to the outside of the yoke 10, which is also convenient for manufacturing stator teeth 20 of the same specifications, and can improve production efficiency and consistency.

[0046] like Figures 1 to 5As shown, further, in the same stator tooth 20, the width of the multiple flanges 211 along the width direction of the stator tooth 20 widens from the inside of the yoke 10 to the outside of the yoke 10, and the flanges 211 are symmetrical about the stator tooth 20. The width of the multiple flanges 211 along the width direction of the stator tooth 20 widens from the inside of the yoke 10 to the outside of the yoke 10, so that the working area of ​​the flanges 211 is increased, so that the part of the stator tooth 20 close to the outside of the yoke 10 can carry more magnetic flux. The widened flanges 211 can guide the magnetic flux to pass through the stator teeth 20 more smoothly, reduce the magnetic leakage between the stator teeth 20 and the yoke 10, and thus prevent the energy loss and reduced operating efficiency of the axial flux motor 200 caused by the magnetic leakage phenomenon. In addition, the widened flange 211 also has a higher structural strength, which can improve the vibration resistance of the stator teeth 20, reduce the vibration of the stator teeth 20 caused by the toothing torque and torque pulsation of the axial flux motor 200, and the vibration of the stator teeth 20 caused by the radial electromagnetic force acting on the stator teeth 20, thereby achieving the purpose of reducing the vibration noise of the motor. The flange 211 is symmetrical about the stator teeth 20, which is convenient for processing, manufacturing and installation.

[0047] Furthermore, if Figure 7 As shown, the flange 211 includes a first flange portion 2111 and a second flange portion 2112. The first flange portion 2111 and the second flange portion 2112 are respectively arranged on opposite sides of the stator tooth 20 in the width direction, and the width L1 of the first flange portion 2111 in the width direction of the stator tooth 20 is greater than the width L2 of the second flange portion 2112 in the width direction of the stator tooth 20. This arrangement can make the air gaps of the winding slots 30 on both sides of the circumferential direction of the yoke 10 of the same stator tooth 20 unequal, so that the effective torque component of the axial flux motor 200 is partially offset, and the average torque of the axial flux motor 200 is also reduced accordingly. This will cause the air gap flux density distribution to be close to a sine wave, so that the harmonic component of the back electromotive force of the axial flux motor 200 is reduced, and the waveform of the back electromotive force of the axial flux motor 200 tends to be more sinusoidal, and the harmonic component of the back electromotive force is reduced. Reducing the harmonic component of the back electromotive force can reduce the cogging torque of the axial flux motor 200, reduce the operating vibration of the axial flux motor 200, and thus reduce the noise generated by the vibration of the axial flux motor 200. At the same time, the width L1 of the first flange portion 2111 along the width direction of the stator tooth 20 is greater than the width L2 of the second flange portion 2112 along the width direction of the stator tooth 20, and the total harmonic distortion value (i.e., THD value, the full name of which is Total Harmonic Distortion in English, which is used to measure the degree of distortion of the harmonic components in the signal to the original signal) is also reduced. Reducing the total harmonic distortion value is beneficial to reducing the cogging torque and torque pulsation of the axial flux motor 200, and reducing the noise generated by the axial flux motor 200.

[0048] Among them, on two adjacent stator teeth 20, the first flange portion 2111 on the first stator tooth 20 is arranged adjacent to the second flange portion 2112 on the other stator tooth 20. This arrangement can make the air gaps of the winding slots 30 on both sides of the circumference on each stator tooth 20 unequal, so that the air gap magnetic flux density distribution on both sides of the circumference on each stator tooth 20 is close to a sine wave, further reducing the harmonic component of the back electromotive force of the axial flux motor 200, and the waveform of the back electromotive force of the axial flux motor 200 is more sinusoidal, so that the operating vibration of the axial flux motor 200 is reduced, thereby reducing the noise generated by the vibration of the axial flux motor 200.

[0049] Furthermore, if Figures 1 to 8 As shown, an insert block 23 is provided on the end of the stator tooth 20 close to the yoke 10, and a slot 11 adapted to the insert block 23 is provided on the yoke 10. Alternatively, in another embodiment, an insert block 23 is provided on the yoke 10, and a slot 11 adapted to the insert block 23 is provided on the end of the stator tooth 20 close to the yoke 10. The insert block 23 is inserted into the slot 11 to quickly fix the stator tooth 20 on the yoke 10. During the operation of the axial flux motor 200, this embodiment can prevent the stator tooth 20 from loosening due to vibration. The assembly method of the insert block 23 and the slot 11 is simple and fast, and the slot 11 can also play a pre-positioning role to provide an installation guide for assembling the insert block 23. The yoke 10 and the stator tooth 20 can be produced separately and then assembled.

[0050] Furthermore, each stator tooth 20 includes a plurality of tooth punching sheets 21, and the plurality of tooth punching sheets 21 are stacked along the radial direction of the yoke 10. The stator teeth 20 can be formed by punching out a silicon steel sheet. Stator teeth 20 of various sizes require the production of models of various specifications. Alternatively, a plurality of tooth punching sheets 21 are punched out first, and then the plurality of tooth punching sheets 21 are stacked to form the stator teeth 20. In the process of punching out a plurality of tooth punching sheets 21 and then stacking them to form the stator teeth 20, the stacking of a plurality of tooth punching sheets 21 can form stator teeth 20 of more specifications. Compared with the manufacturing method in which the stator teeth 20 are punched out of a silicon steel sheet, the manufacturing method in which a plurality of tooth punching sheets 21 are punched out and then stacked to form the stator teeth 20 can reduce the shape and number of the tooth punching sheets 21, and can reduce the complexity and cost of the punching mold.

[0051] Alternatively, the stator teeth 20 may be provided as an integrally formed structure, which is more convenient for production.

[0052] like Fig. 9As shown, further, the stator of the axial flux motor also includes a plastic package 40 and a winding, the winding is wound on the stator teeth 20, and the plastic package 40 covers the outer surface of the structure formed by the stator teeth 20, the yoke 10 and the winding. When assembling the stator 100 of the axial flux motor, the winding can be firstly wound into an annular coil matching the stator teeth 20, and then the annular coil is sleeved on the stator teeth 20 from one end of the stator teeth 20 close to the yoke 10, and finally the stator teeth 20 with assembled windings are plugged and fixed on the yoke 10. This assembly method solves the problems of low efficiency of winding, winding and punching of the stator core 100 of the traditional axial flux motor, low efficiency of winding in the winding slot 30, and low effective area of ​​the winding slot 30 caused by the need to leave space for the movement of the winding needle between the windings in the winding slot 30.

[0053] According to another aspect of the present invention, Figures 1 to 11 As shown, the present invention also discloses an axial flux motor 200. The axial flux motor 200 includes a rotor assembly 201 and the stator 100 of the axial flux motor. The rotor assembly 201 includes a rotor core 202 and a rotating shaft 203. The rotor core 202 and the stator 100 of the axial flux motor are arranged opposite to each other in the axial direction, and the rotating shaft 203 is passed through the rotor core 202 and the stator 100 of the axial flux motor. The rotor core 202 can be made of permanent magnets, and the rotor core 202 and the stator 100 of the axial flux motor are magnetically coupled, so that the rotor core 202 can rotate. The rotating shaft 203 passes through the rotor core 202 and is connected to the rotor core 202, and the rotor core 202 can drive the rotating shaft 203 to rotate. The axial flux motor 200 includes all the technical effects of the stator 100 of the axial flux motor. Since the technical effects of the stator 100 of the axial flux motor have been described in detail above, they will not be repeated here.

[0054] The plastic package body 40 is provided with a first installation cavity 41 and a second installation cavity 42 separated in the axial direction. The first installation cavity 41 is used to accommodate the stator teeth 20, the yoke 10 and the winding. The second installation cavity 42 is used to accommodate the rotor core 202. The plastic package body 40 is an annular structure, and the rotating shaft 203 is fixed in the inner ring of the plastic package body 40 through a bearing. A cover body 43 is provided at the top of the plastic package body to cover the second installation cavity 42.

[0055] According to another aspect of the present invention, Figures 1 to 12 As shown, the present invention also discloses a wind wheel assembly 300. The wind wheel assembly 300 includes an impeller 301 and the above-mentioned axial flux motor 200. The axial flux motor 200 is drivingly connected to the impeller 301, and the axial flux motor 200 can drive the impeller 301 to rotate. The wind wheel assembly 300 includes all the technical effects of the above-mentioned axial flux motor 200, which will not be repeated here.

[0056] like Figures 1 to 9As shown, in the present invention, the winding can be quickly formed by winding the wire, and the processing efficiency is extremely high. The stator teeth 20 and the yoke 10 can be punched and manufactured at high speed. The stator teeth 20 and the yoke 10 are simple to manufacture, have high processing efficiency, and save manufacturing materials. The low efficiency of winding, winding, and punching of the stator core of the traditional axial flux motor, the low processing efficiency of winding in the winding slot 30, and the need to leave a winding needle movement space between the windings in the winding slot 30 cause the effective area of ​​the winding slot 30 to be low. In addition, the winding, stator teeth 20 and yoke 10 are integrally plastic-sealed by the plastic sealing body 40, which not only makes the installation and fixing strength of the stator teeth 20, the winding and the yoke 10 good, the positioning accuracy is high, and the plastic sealing body 40 is easy to be injection molded into various required structural shapes. The plastic package body 40 is made of a specially formulated thermosetting plastic package material to ensure that the plastic package body 40 has high insulation, high thermal conductivity and good damping properties, which is beneficial to improving the insulation reliability of the plastic package body 40 and reducing the temperature rise and noise of the stator 100, the axial flux motor 200 and the wind wheel assembly 300 of the axial flux motor.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stator for an axial flux motor, characterized in that: include: A yoke (10), wherein the yoke (10) is arranged in a ring shape; stator teeth (20), the stator teeth (20) protruding from the surface of the yoke (10) along the axial direction of the yoke (10), the stator teeth (20) comprising a plurality of stator teeth (20), the plurality of stator teeth (20) being arranged at intervals along the circumferential direction of the yoke (10) and surrounding to form winding slots (30), and in the same stator tooth (20), the stator teeth (20) comprising a first tooth segment located on the inner side of the yoke (10) and a second tooth segment located on the outer side of the yoke (10); Wherein, along the direction from the inner side of the yoke (10) to the outer side of the yoke (10), the width of the first tooth segment along the width direction of the stator tooth (20) becomes wider; and the width of the second tooth segment along the width direction of the stator tooth (20) remains unchanged.

2. The stator of the axial flux motor according to claim 1, characterized in that: In the same stator tooth (20), along the radial direction of the yoke (10), the ratio of the length of the second tooth segment to the length of the stator tooth (20) is 1 / 4 to 4 / 7.

3. The stator of the axial flux motor according to claim 2, characterized in that: A flange (211) extending along the width direction of the stator tooth (20) is provided at the end of the stator tooth (20) away from the yoke (10), and a plurality of flanges (211) in the same stator tooth (20) form a pole shoe (22), and the width of the pole shoe (22) along the width direction of the stator tooth (20) widens from the inner side of the yoke (10) to the outer side of the yoke (10).

4. The stator of the axial flux motor according to claim 3, characterized in that: The distance between two adjacent pole shoes (22) remains constant in a direction from the inner side of the yoke (10) to the outer side of the yoke (10).

5. The stator of the axial flux motor according to claim 4, characterized in that: The flange (211) includes a first flange portion (2111) and a second flange portion (2112), wherein the first flange portion (2111) and the second flange portion (2112) are respectively arranged on opposite sides of the stator tooth (20) along the width direction, and the width of the first flange portion (2111) along the width direction of the stator tooth (20) is greater than the width of the second flange portion (2112) along the width direction of the stator tooth (20).

6. The stator of the axial flux motor according to claim 5, characterized in that: On two adjacent stator teeth (20), the first flange portion (2111) on the first stator tooth (20) and the second flange portion (2112) on the other stator tooth (20) are arranged adjacent to each other.

7. The stator of an axial flux motor according to any one of claims 1 to 6, characterized in that: An insert block (23) is provided on one of the end of the stator tooth (20) close to the yoke (10) and the yoke (10), and a slot (11) matched with the insert block (23) is provided on the other of the two.

8. The stator of an axial flux motor according to any one of claims 1 to 6, characterized in that: The stator teeth (20) are of an integrally formed structure; and / or each of the stator teeth (20) comprises a plurality of tooth punching sheets (21), and the plurality of tooth punching sheets (21) are stacked along the radial direction of the yoke (10).

9. The stator of an axial flux motor according to any one of claims 1 to 6, characterized in that: It also includes a plastic packaging body (40) and a winding, wherein the winding is wound around the stator teeth (20), and the plastic packaging body (40) covers the outer surface of the structure formed by the stator teeth (20), the yoke (10) and the winding.

10. An axial flux motor, characterized in that: The axial flux motor (200) comprises a rotor assembly (201) and a stator (100) of the axial flux motor according to any one of claims 1 to 9, wherein the rotor assembly (201) comprises a rotor core (202) and a rotating shaft (203), wherein the rotor core (202) and the stator (100) of the axial flux motor are arranged opposite to each other in the axial direction, and the rotating shaft (203) passes through the rotor core (202) and the stator (100) of the axial flux motor.

11. A wind wheel assembly, characterized in that: The wind wheel assembly (300) comprises an impeller (301) and the axial flux motor (200) according to claim 10, and the axial flux motor (200) is drivingly connected to the impeller (301).

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