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

Abstract

The utility model discloses a stator of an axial flux motor, the axial flux motor and a wind wheel assembly. The stator of the axial flux motor comprises a yoke part, stator teeth, a winding and a plastic package body. The yoke part is annularly arranged. The stator teeth protrude out of the surface of the yoke part along 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 a winding groove is formed between every two adjacent stator teeth. Each stator tooth comprises a plurality of tooth part punching sheets, the plurality of tooth part punching sheets are stacked along the radial direction of the yoke part, and flanges extending along the width direction of the tooth part punching sheets are arranged at the end parts, far away from the yoke part, of the tooth part punching sheets. The plurality of flanges in the same stator tooth form a pole shoe, and the width of the pole shoe in the same stator tooth in the width direction of the stator tooth is increased from the inner side of the yoke part to the outer side of the yoke part. The winding is wound around the stator teeth. The plastic package body is arranged on the outer surface of a structure formed by the stator teeth, the yoke part and the winding in a wrapping mode. 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 more particularly, 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 such as air-conditioning fans mostly adopt an internal rotor structure to reduce the axial dimension of the permanent magnet motor, thereby reducing the occupied area of the permanent magnet motor. However, the cogging torque and torque ripple inside the permanent magnet motor with an internal rotor structure are relatively large, resulting in the problem of large vibration and noise of the permanent magnet motor. Summary of the Utility Model

[0003] The main object 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 large vibration and noise of the permanent magnet motor mentioned in the background art.

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

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

[0006] Stator teeth, the stator teeth protrude from the surface of the yoke along the axial direction of the yoke, there are a plurality of the stator teeth, the plurality of stator teeth are arranged at intervals along the circumferential direction of the yoke, there is a winding groove between adjacent two of the stator teeth, each of the stator teeth includes a plurality of tooth laminations, the plurality of tooth laminations are stacked along the radial direction of the yoke, a flange extending along the width direction of the tooth lamination is arranged at the end of the tooth lamination far from the yoke, the flanges in the same stator tooth form a pole shoe, and the width of the pole shoe in the same stator tooth along the width direction of the stator tooth becomes wider from the inner side of the yoke to the outer side of the yoke;

[0007] A winding, the winding is wound around the stator teeth;

[0008] A plastic encapsulation body, the plastic encapsulation body is coated on the outer surface of the structure formed by the stator teeth, the yoke, and the winding.

[0009] Further, the flange includes a first flange portion and a second flange portion extending along the width direction of the tooth lamination, 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 tooth lamination is greater than the width of the second flange portion along the width direction of the tooth lamination.

[0010] Further, in the same stator tooth, the widths of the plurality of first flange portions in the width direction of the tooth portion punching sheet become wider from the inner side of the yoke portion toward the outer side of the yoke portion; in the same stator tooth, the widths of the plurality of second flange portions in the width direction of the tooth portion punching sheet become wider from the inner side of the yoke portion toward the outer side of the yoke portion.

[0011] Further, on two adjacent stator teeth, the first flange portion on the first stator tooth is adjacently arranged to the second flange portion on the other stator tooth.

[0012] Further, on two adjacent stator teeth, the spacing between the plurality of first flange portions on the first stator tooth and the plurality of second flange portions on the other stator tooth remains unchanged from the inner side of the yoke portion toward the outer side of the yoke portion.

[0013] Further, the upper surfaces of the first flange portion and the second flange portion away from the yoke portion are parallel to the surface of the yoke portion, the lower surfaces of the first flange portion and the second flange portion close to the yoke portion are inclined surfaces, and the width of the end of the first flange portion and the second flange portion away from the winding slot in the axial direction of the yoke portion is greater than the width of the end of the first flange portion and the second flange portion close to the winding slot in the axial direction of the yoke portion.

[0014] Further, the widths of all the tooth portion punching sheets in the same stator tooth become wider from the inner side of the yoke portion toward the outer side of the yoke portion.

[0015] Further, a plug is provided on one of the end of the stator tooth close to the yoke portion and the yoke portion, and a slot adapted to the plug is provided on the other.

[0016] On the other hand, the present application further provides an axial flux motor, which includes a rotor assembly and the stator of the axial flux motor according to any one of the above technical solutions. The rotor assembly includes a rotor core and a rotating shaft. The rotor core is located outside the stator of the axial flux motor, 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 further provides a wind wheel assembly, which includes an impeller and the axial flux motor in the above technical solution. The axial flux motor is drivingly connected to the impeller.

[0018] In this application, by making the width of the pole shoe in the same stator tooth gradually increase from the inner side of the yoke to the outer side of the yoke in the width direction of the stator tooth, the slot width of the winding slot can be smoothly transitioned and changed from the inner side of the yoke to the outer side of the yoke, thereby reducing the sudden change in magnetic flux caused by the large change in the slot width of the winding slot. Such a setting can optimize the distribution of magnetic flux between the stator tooth and the pole shoe, ensure that the magnetic flux path is more uniform, and is beneficial to reducing the pulsation of the tangential component of the interaction force between the permanent magnet and the stator tooth in the axial flux motor, that is, reducing the cogging torque of the axial flux motor. Therefore, the stator of the axial flux motor can reduce the cogging torque of the axial flux motor and the torque ripple of the axial flux motor caused by the cogging torque, achieving the purpose of reducing torque ripple and the vibration and noise generated by the axial flux motor. Among them, the more uniform magnetic flux distribution between the stator tooth and the pole shoe 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 of the axial flux motor, making the harmonic content in the back electromotive force of the axial flux motor lower, the waveform more sinusoidal, the axial flux motor running more smoothly, and the torque fluctuation smaller, which is beneficial to reducing the noise generated by the axial flux motor. At the same time, the frequency of the fundamental wave of the cogging torque is increased, further reducing the vibration and noise generated by the axial flux motor. At the same time, the pole shoe can increase the magnetic conduction area and power density of the stator of the axial flux motor, optimize the distribution of the electromagnetic field, and enhance the structural strength of the stator of the axial flux motor, enabling the stator of the axial flux motor to more effectively carry and conduct electromagnetic force, reducing the air gap magnetic resistance of the axial flux motor, and further being beneficial to reducing the noise generated by the axial flux motor.

[0019] When assembling the stator of the axial flux motor, the winding can be first wound into an annular coil matching the stator tooth, and then the annular coil can be sleeved on the stator tooth from one end of the stator tooth close to the yoke. This assembly method solves the problems of low efficiency in winding, coiling, and punching of the stator core of the traditional axial flux motor, low efficiency in winding the wire into the winding slot, and low effective area of the winding slot due to the need to leave space for the movement of the winding needle between the windings in the winding slot. By integrally encapsulating the winding, the stator tooth, and the yoke with a plastic encapsulation body, not only the installation and fixation strength of the stator tooth, the winding, and the yoke is good, and the positioning accuracy is high, but also the plastic encapsulation body is convenient for injection molding into various required structural shapes. And the plastic encapsulation body is made of a special formula of thermosetting plastic encapsulation material, ensuring that the plastic encapsulation body has high insulation, high thermal conductivity, and good damping characteristics, which is beneficial to improving the insulation reliability of the plastic encapsulation body and reducing the noise generated by the stator of the axial flux motor. Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the schematic embodiments and descriptions thereof of the present application are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0021] Figure 1 Top view of the stator of the axial flux motor disclosed in the present application;

[0022] Figure 2 Schematic diagram of the stator teeth disclosed in the present application;

[0023] Figure 3 Schematic structural diagram of the yoke disclosed in the present application;

[0024] Figure 4 Schematic structural diagram of the plastic encapsulation body disclosed in the present application;

[0025] Figure 5 Schematic structural diagram of the axial flux motor disclosed in the present application;

[0026] Figure 6 Cross-sectional view of the axial flux motor disclosed in the present application;

[0027] Figure 7 Schematic structural diagram of the wind wheel assembly disclosed in the present application.

[0028] Among them, the above-mentioned drawings include the following reference numerals:

[0029] 100, stator; 10, yoke; 11, slot; 20, stator teeth; 21, tooth punching sheet; 211, flange; 2111, first flange part; 2112, second flange part; 22, pole shoe; 23, insert block; 30, winding slot; 40, plastic encapsulation body; 41, first installation cavity; 42, second installation cavity; 43, cover body; 200, axial flux motor; 201, rotor assembly; 202, rotor core; 203, rotating shaft; 300, wind wheel assembly; 301, impeller. Detailed implementation manners

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0031] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners 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 "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0033] Cogging torque is the circumferential torque generated by the interaction between the permanent magnet and the stator teeth when the motor is not energized. This torque varies with the change of the rotor position, so it is a pulsating torque. The generation of this cogging torque comes from the resultant tangential force between the permanent magnet and the stator teeth. The tangential force always tries to align the magnetic field axis of the permanent magnet with the axis of the stator teeth, so that the rotor has a tendency to be positioned at a certain position. When the motor rotor rotates, the permanent magnet causes a large change in the magnetic permeance within a small range of the stator teeth, resulting in a change in the magnetic field energy storage, thereby generating cogging torque. Cogging torque will cause torque ripple in the permanent magnet motor, and further lead to speed fluctuation. Torque ripple will also cause the motor to generate vibration and noise. When the frequency of the pulsating torque is consistent with the resonance frequency of the armature current, resonance will occur, which will amplify the vibration and noise of the cogging torque.

[0034] In order to solve the problem that the cogging torque and torque ripple inside the permanent magnet motor with the existing built-in rotor structure are relatively large, resulting in the problems of large vibration and noise in the permanent magnet motor, the present utility model provides a stator of an axial flux motor, an axial flux motor, and a wind wheel assembly.

[0035] As Figures 1 to 7As shown, the stator 100 of the axial flux motor includes a yoke 10, stator teeth 20, windings, and a plastic encapsulation body 40. The yoke 10 is arranged in a ring shape. The stator teeth 20 protrude axially from the surface of the yoke 10. There are multiple stator teeth 20, and the multiple stator teeth 20 are arranged at intervals in the circumferential direction of the yoke 10. There is a winding groove 30 between two adjacent stator teeth 20. Each stator tooth 20 includes multiple tooth laminations 21, and the multiple tooth laminations 21 are stacked in the radial direction of the yoke 10. A flange 211 extending in the width direction of the tooth lamination 21 is provided at the end of the tooth lamination 21 away from the yoke 10. The multiple flanges 211 in the same stator tooth 20 form a pole shoe 22. The width H2 of the pole shoe 22 in the width direction of the stator tooth 20 in the same stator tooth 20 becomes wider from the inner side of the yoke 10 to the outer side of the yoke 10. The windings are wound around the stator teeth 20. The plastic encapsulation body 40 is coated on the outer surface of the structure formed by the stator teeth 20, the yoke 10, and the windings.

[0036] In this embodiment, by making the width H2 of the pole shoe 22 in the width direction of the stator tooth 20 in the same stator tooth 20 become wider from the inner side of the yoke 10 to the outer side of the yoke 10, the groove width of the winding groove 30 can be smoothly transitioned and changed from the inner side of the yoke 10 to the outer side of the yoke 10, thereby reducing the sudden change of magnetic flux caused by the large change in the groove width of the winding groove 30. Such a setting can optimize the distribution of magnetic flux between the stator teeth 20 and the pole shoes 22, ensure that the magnetic flux path is more uniform, and is beneficial to reducing 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 generated by the interaction between the permanent magnet and the stator teeth 20. Therefore, the stator 100 of the axial flux motor can reduce the cogging torque of the axial flux motor 200 and the torque ripple of the axial flux motor 200 caused by the cogging torque, and achieve the purpose of reducing the torque ripple and the vibration and noise generated by the axial flux motor 200. Among them, the more uniform magnetic flux distribution 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, making the harmonic content in the back electromotive force of the axial flux motor 200 lower, the waveform more sinusoidal, the axial flux motor 200 running more smoothly, and the torque fluctuation smaller, which is beneficial to reducing the noise generated by the axial flux motor 200. At the same time, the frequency of the fundamental wave of the cogging torque is increased, further reducing the vibration and noise generated by the axial flux motor 200. At the same time, the pole shoe 22 can increase the magnetic conduction 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 facilitate reducing the noise generated by the axial flux motor 200.

[0037] When assembling the stator 100 of the axial flux motor, the winding can be first wound into an annular coil matching the stator teeth 20, and then the annular coil can be sleeved on the stator teeth 20 from one end of the stator teeth 20 close to the yoke 10. This assembly method solves the problems of low efficiency in core rolling, winding, and punching of the stator 100 of the traditional axial flux motor, low efficiency in winding the winding groove 30, and low effective area of the winding groove 30 due to the need to leave space for the movement of the winding needle between the windings in the winding groove 30. By integrally encapsulating the winding, the stator teeth 20, and the yoke 10 with the encapsulation body 40, not only the installation and fixation strength of the stator teeth 20, the winding, and the yoke 10 are good, and the positioning accuracy is high, but also the encapsulation body 40 is convenient for injection molding into various required structural shapes. And the encapsulation body 40 is made of a special formula of thermosetting encapsulation material, ensuring that the encapsulation body 40 has high insulation, high thermal conductivity, and good damping characteristics, which is beneficial to improving the insulation reliability of the encapsulation body 40 and reducing the noise generated by the stator 100 of the axial flux motor.

[0038] As Figures 1 to 2 shown, in one embodiment, the flange 211 includes a first flange portion 2111 and a second flange portion 2112 extending along the width direction of the tooth portion punching sheet 21. The first flange portion 2111 and the second flange portion 2112 are respectively arranged on opposite sides of the stator teeth 20 along the width direction. The width L1 of the first flange portion 2111 along the width direction of the tooth portion punching sheet 21 is greater than the width L2 of the second flange portion 2112 along the width direction of the tooth portion punching sheet 21. Such a setting can make the air gaps of the winding grooves 30 on both circumferential sides of the same stator teeth 20 along the yoke 10 unequal, so that part of the effective torque component of the axial flux motor 200 is cancelled, and the average torque of the axial flux motor 200 will also be correspondingly reduced. This will cause the air gap flux density distribution to approach a sine wave, making the harmonic components of the back electromotive force of the axial flux motor 200 decrease, and the waveform of the back electromotive force of the axial flux motor 200 tend to be more sinusoidal, while the harmonic components of the back electromotive force decrease. The reduction of the harmonic components of the back electromotive force can reduce the cogging torque of the axial flux motor 200, reduce the running 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 tooth portion punching sheet 21 being greater than the width L2 of the second flange portion 2112 along the width direction of the tooth portion punching sheet 21 will also reduce the total harmonic distortion value (i.e., the THD value, the full English name is Total Harmonic Distortion, which is used to measure the distortion degree of the harmonic components in the signal to the original signal). The reduction of the total harmonic distortion value is beneficial to reducing the cogging torque and torque ripple of the axial flux motor 200 and reducing the noise generated by the axial flux motor 200.

[0039] In one embodiment, in the same stator tooth 20, the widths of a plurality of first flange portions 2111 in the width direction of the tooth punching sheet 21 become wider from the inner side of the yoke portion 10 toward the outer side of the yoke portion 10. Alternatively, in the same stator tooth 20, the widths of a plurality of second flange portions 2112 in the width direction of the tooth punching sheet 21 become wider from the inner side of the yoke portion 10 toward the outer side of the yoke portion 10. The widths of the first flange portions 2111 and the second flange portions 2112 in the width direction of the tooth punching sheet 21 become wider from the inner side of the yoke portion 10 toward the outer side of the yoke portion 10, increasing the working area of the flange 211 and enabling the portion of the stator tooth 20 near the outer side of the yoke portion 10 to carry more magnetic flux. The widened flange 211 can guide the magnetic flux to pass through the stator tooth 20 more smoothly, reducing the magnetic leakage phenomenon between the stator tooth 20 and the yoke portion 10, thereby preventing problems such as energy loss and reduced operating efficiency of the axial flux motor 200 caused by the magnetic leakage phenomenon. In addition, the widened first flange portions 2111 and second flange portions 2112 also have higher structural strength, which can improve the vibration resistance of the stator tooth 20, reduce the vibration of the stator tooth 20 caused by the cogging torque and torque ripple of the axial flux motor 200, and the vibration of the stator tooth 20 caused by the action of the radial electromagnetic force on the stator tooth 20, which is more conducive to achieving the purpose of reducing the vibration noise of the motor.

[0040] In one embodiment, on two adjacent stator teeth 20, the first flange portion 2111 on the first stator tooth 20 is adjacent to the second flange portion 2112 on the other stator tooth 20. Such an arrangement can make the air gaps of the winding grooves 30 on both circumferential sides of each stator tooth 20 unequal, make the air gap magnetic flux density distribution on both circumferential sides of each stator tooth 20 approach a sine wave, further reduce the harmonic components of the back electromotive force of the axial flux motor 200, make the waveform of the back electromotive force of the axial flux motor 200 more tend to be sinusoidal, reduce the running vibration of the axial flux motor 200, and thereby reduce the noise generated by the vibration of the axial flux motor 200.

[0041] In one embodiment, on two adjacent stator teeth 20, the spacing H1 between a plurality of first flange portions 2111 on the first stator tooth 20 and a plurality of second flange portions 2112 on the other stator tooth 20 remains unchanged in the direction from the inner side of the yoke 10 to the outer side of the yoke 10. When the axial flux motor 200 operates, the magnetic flux enters and leaves 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 between the adjacent first flange portions 2111 and the second flange portions 2112 remains unchanged, which can form a stable magnetic field distribution between the pole shoes 22, optimize the magnetic flux path and the distribution of the electromagnetic force, ensure that the reluctance is also relatively stable on the magnetic flux path, and further help to reduce the magnetic flux fluctuation caused by the change of the reluctance, so as to reduce the vibration and noise of the axial flux motor 200. And such a setting also facilitates the production of the tooth punching sheets 21 with the same specifications, which can improve the production efficiency and consistency.

[0042] In one embodiment, the upper surfaces of the first flange portions 2111 and the second flange portions 2112 away from the yoke 10 are parallel to the surface of the yoke 10, the lower surfaces of the first flange portions 2111 and the second flange portions 2112 close to the yoke 10 are inclined surfaces, and the width of the ends of the first flange portions 2111 and the second flange portions 2112 away from the winding grooves 30 along the axial direction of the yoke 10 is greater than the width of the ends of the first flange portions 2111 and the second flange portions 2112 close to the winding grooves 30 along the axial direction of the yoke 10. The upper surfaces of the first flange portions 2111 and the second flange portions 2112 away from the yoke 10 are parallel to the surface of the yoke 10, which is convenient for improving the flatness of the top of the stator tooth 20 and facilitating the encapsulation of the stator tooth 20 in the encapsulation body 40. The lower surfaces of the first flange portions 2111 and the second flange portions 2112 close to the yoke 10 are inclined surfaces, which can make the air gaps of the winding grooves 30 on the circumferential two sides of the stator tooth 20 unequal, which is beneficial to make the waveform of the back electromotive force of the axial flux motor 200 more tend to be sinusoidal, reduce the running vibration of the axial flux motor 200, and further reduce the noise generated by the vibration of the axial flux motor 200. And the width of the first flange portions 2111 and the second flange portions 2112 along the axial direction of the yoke 10 close to the stator tooth 20 is larger, which can strengthen the connection strength between the first flange portions 2111 and the second flange portions 2112 and the stator tooth 20, make the first flange portions 2111 and the second flange portions 2112 have better vibration resistance, and is beneficial to reduce the noise generated by the axial flux motor 200.

[0043] In one embodiment, the widths H1 of all the tooth laminations 21 in the same stator tooth 20 increase in the direction from the inner side of the yoke 10 to the outer side of the yoke 10. When the widths H1 of all the tooth laminations 21 increase in the direction from the inner side of the yoke 10 to the outer side of the yoke 10, the slot width of the winding slot 30 also changes uniformly accordingly. Such a setting can reduce the sudden change of magnetic flux caused by a large change in the slot width of the winding slot 30, which is beneficial to reducing the amplitude of the cogging torque. A smaller cogging torque can make the axial flux motor 200 operate more smoothly, which is beneficial to reducing the vibration and noise generated by the axial flux motor 200. Moreover, the width H1 of the tooth lamination 21 increases uniformly in the direction from the inner side of the yoke 10 to the outer side of the yoke 10, which also enables the magnetic flux to be more evenly distributed when passing through the stator tooth 20. The more evenly distributed magnetic flux can reduce the concentration and distortion of the magnetic flux at the tooth edge, thereby improving the utilization efficiency of the magnetic flux and reducing the local overheating or saturation phenomenon caused by the uneven distribution of the magnetic flux. In addition, the uniform increase in the width H1 of all the tooth laminations 21 is also convenient for design and manufacturing.

[0044] As Figures 1 to 3 shown, in one embodiment, a plug 23 is provided at the end of the stator tooth 20 close to the yoke 10, and a slot 11 adapted to the plug 23 is provided on the yoke 10. Alternatively, in another embodiment, a plug 23 is provided on the yoke 10, and a slot 11 adapted to the plug 23 is provided at the end of the stator tooth 20 close to the yoke 10. Inserting the plug 23 into the slot 11 can quickly fix and install 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 plug 23 and the slot 11 is simple and fast, and the slot 11 can also play a pre-positioning role and provide an installation guide for assembling the plug 23. The yoke 10 and the stator tooth 20 can be produced separately and then assembled.

[0045] Among them, a first installation cavity 41 and a second installation cavity 42 are axially separated in the plastic sealing body 40. The first installation cavity 41 is used to accommodate the stator tooth 20, the yoke 10 and the winding. The second installation cavity 42 is used to accommodate the rotor core 202. The plastic sealing body 40 is of an annular structure, and the rotating shaft 203 is fixed in the inner ring of the plastic sealing body 40 through a bearing. A cover body 43 is provided at the top of the plastic sealing body to cover the second installation cavity 42.

[0046] According to another aspect of the present application, as Figures 1 to 6As shown in the figure, the present application also discloses an axial flux motor 200. The axial flux motor 200 includes a rotor assembly 201 and the stator 100 of the above axial flux motor. The rotor assembly 201 includes a rotor core 202 and a rotating shaft 203. The rotor core 202 is located outside the stator 100 of the axial flux motor, and the rotating shaft 203 passes through the rotor core 202 and the stator 100 of the axial flux motor. The rotor core 202 can be made of a permanent magnet, and the rotor core 202 is magnetically coupled with the stator 100 of the axial flux motor, which can cause the rotor core 202 to 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 above 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.

[0047] According to another aspect of the present application, as Figure 7 shown in the figure, the present application also discloses a wind wheel assembly 300. The wind wheel assembly 300 includes an impeller 301 and the above 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 axial flux motor 200, which will not be repeated here.

[0048] On the other hand, the embodiment of the present application also provides a battery, which includes the above electrode assembly. Therefore, the battery includes all the technical effects of the above electrode assembly. Since the technical effects of the electrode assembly have been described in detail above, they will not be repeated here.

[0049] For the sake of convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" and the like can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0050] 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. Without additional statements, the above terms have no special meanings, so they should not be construed as limiting the protection scope of this application.

[0051] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this 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; A stator tooth (20), wherein the stator tooth (20) protrudes from the surface of the yoke (10) along the axial direction of the yoke (10), the stator tooth (20) comprises a plurality of stator teeth (20), the plurality of stator teeth (20) are arranged at intervals along the circumferential direction of the yoke (10), a winding slot (30) is provided between two adjacent stator teeth (20), each of the stator teeth (20) comprises a plurality of tooth punching sheets (21), and the plurality of tooth punching sheets (21) are arranged along the yoke (10). The stator teeth (20) are radially stacked, the end of the tooth punching sheet (21) away from the yoke (10) is provided with a flange (211) extending along the width direction of the tooth punching sheet (21), a plurality of the flanges (211) in the same stator tooth (20) form a pole shoe (22), and the width of the pole shoe (22) in the same stator tooth (20) 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); A winding, the winding being wound around the stator teeth (20); A plastic packaging body (40) is provided to cover the outer surface of the structure formed by the stator teeth (20), the yoke (10) and the winding.

2. The stator of the axial flux motor according to claim 1, characterized in that: The flange (211) includes a first flange portion (2111) and a second flange portion (2112) extending along the width direction of the tooth punching sheet (21); 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; the width of the first flange portion (2111) along the width direction of the tooth punching sheet (21) is greater than the width of the second flange portion (2112) along the width direction of the tooth punching sheet (21).

3. The stator of the axial flux motor according to claim 2, characterized in that: In the same stator tooth (20), the width of multiple first flange portions (2111) along the width direction of the tooth punching sheet (21) widens from the inner side of the yoke (10) to the outer side of the yoke (10); in the same stator tooth (20), the width of multiple second flange portions (2112) along the width direction of the tooth punching sheet (21) 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: 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.

5. The stator of the axial flux motor according to claim 4, characterized in that: On two adjacent stator teeth (20), the spacing between the multiple first flange portions (2111) on the first stator tooth (20) and the multiple second flange portions (2112) on the other stator tooth (20) remains unchanged in the direction from the inner side of the yoke (10) to the outer side of the yoke (10).

6. The stator of the axial flux motor according to claim 4, characterized in that: The upper surfaces of the first flange portion (2111) and the second flange portion (2112) away from the yoke (10) are parallel to the surface of the yoke (10), the lower surfaces of the first flange portion (2111) and the second flange portion (2112) close to the yoke (10) are inclined surfaces, and the width of one end of the first flange portion (2111) and the second flange portion (2112) away from the winding groove (30) along the axial direction of the yoke (10) is greater than the width of one end of the first flange portion (2111) and the second flange portion (2112) close to the winding groove (30) along the axial direction of the yoke (10).

7. The stator of an axial flux motor according to any one of claims 1 to 6, characterized in that: The widths of all the tooth punching sheets (21) in the same stator tooth (20) widen from the inner side of the yoke (10) to the outer side of the yoke (10).

8. 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.

9. An axial flux motor, characterized in that: The axial flux motor (200) comprises a rotor assembly (201) and the stator (100) of the axial flux motor according to any one of claims 1 to 8, wherein the rotor assembly (201) comprises a rotor core (202) and a rotating shaft (203), wherein the rotor core (202) is located outside the stator (100) of the axial flux motor, and the rotating shaft (203) is passed through the rotor core (202) and the stator (100) of the axial flux motor.

10. 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 9, and the axial flux motor (200) is drivingly connected to the impeller (301).

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