Stator Core, Stator, Motor and Fan

Abstract

The present invention provides a stator core, a stator, a motor and a fan. The stator core includes: a stator yoke, the stator yoke is provided with a connection structure for connecting stator teeth, and the connection structure includes a first connection part and a second connection part which are arranged at intervals along the circumferential direction of the stator core; stator teeth, arranged on the stator yoke, including a first tooth part and a second tooth part which are arranged at intervals along the circumferential direction of the stator core, the first tooth part is connected to the stator yoke through the first connection part, the second tooth part is connected to the stator yoke through the second connection part, and the first tooth part and the second tooth part together form the tooth body of the stator tooth, and the tooth body extends along the circumferential direction of the stator yoke and is wound by the same winding. The application adopts a cross-tooth winding method, which is beneficial to eliminating low-order harmonics compared with the single-tooth winding method in the prior art, thereby improving the sinusoidality of the back electromotive force of the motor and reducing the cogging torque ripple, which is beneficial to reducing the cogging torque and further reducing the vibration and noise of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular, to a stator core, a stator, a motor, and a device. Background Art

[0002] Conventional axial motors all adopt the single-tooth winding method, which introduces more harmonics, resulting in a decrease in the sinusoidality of the back electromotive force of the motor and an increase in the cogging torque ripple, affecting the performance of the motor. Summary of the Invention

[0003] To solve at least one of the above technical problems, the first object of the present invention is to provide a stator core of a stator core.

[0004] The second object of the present invention is to provide a stator including the above stator core.

[0005] The third object of the present invention is to provide a motor including the above stator.

[0006] The fourth object of the present invention is to provide a blower including the above motor.

[0007] To achieve the above object, the technical solution of the first aspect of the present invention provides a stator core, including: a stator yoke, the stator yoke is provided with a connection structure for connecting stator teeth, the connection structure includes a first connection portion and a second connection portion that are circumferentially spaced apart along the stator core; stator teeth, provided on the stator yoke, including a first tooth portion and a second tooth portion that are circumferentially spaced apart along the stator core, the first tooth portion is connected to the stator yoke through the first connection portion, the second tooth portion is connected to the stator yoke through the second connection portion, and the first tooth portion and the second tooth portion together form the tooth body of the stator tooth, the tooth body extends axially along the stator yoke and is for the same winding to be wound around.

[0008] The stator core provided by the technical solution of the first aspect of the present invention is applicable to an axial motor. Its stator teeth include a first tooth portion and a second tooth portion that are circumferentially spaced apart along the stator core. The connection structure on the stator yoke for connecting the stator teeth also correspondingly includes a first connection portion and a second connection portion that are circumferentially spaced apart along the stator core. The first tooth portion is connected to the first connection portion, and the second tooth portion is connected to the second connection portion to realize the connection between the stator teeth and the stator yoke, ensuring the integrity of the stator core. Since the first tooth portion and the second tooth portion are circumferentially spaced apart along the stator core, it is equivalent to splitting the integral stator teeth in the prior art, so that the winding wound on the stator teeth is equivalent to adopting a cross-tooth winding method. Compared with the single-tooth winding method in the prior art, it is beneficial to eliminate low-order harmonics, thereby improving the sinusoidality of the back electromotive force of the motor and reducing the cogging torque ripple, which is beneficial to reducing the cogging torque and further reducing the vibration and noise of the motor.

[0009] Among them, the materials of the stator teeth and the stator yoke can be silicon steel sheets. Any other solutions that can achieve the purpose of the present invention should be within the protection scope of the present invention.

[0010] In addition, the stator core in the above technical solution provided by the present invention may further have the following additional technical features:

[0011] In the above technical solution, the first connecting portion and the second connecting portion are parallel to each other, so that the first tooth portion and the second tooth portion are parallel to each other; or, the first connecting portion and the second connecting portion are arranged in a V shape, so that the first tooth portion and the second tooth portion are arranged in a V shape.

[0012] When the first connecting portion and the second connecting portion are parallel to each other, the adapted first tooth portion and the second tooth portion are parallel to each other, which is convenient for adjusting the parallel tooth slot pitch between the first tooth portion and the second tooth portion, thereby effectively improving the sinusoidality of the back electromotive force of the motor and reducing the cogging torque.

[0013] When the first connecting portion and the second connecting portion are arranged in a V shape, the adapted first tooth portion and the second tooth portion are also arranged in a V shape, which is beneficial to increasing the end face area of the tooth body, and then increasing the contact area between the tooth tip and the rotor permanent magnet, which is beneficial to improving the utilization rate of the rotor permanent magnet and further improving the back electromotive force of the motor and further reducing the cogging torque. Among them, the V-shaped opening can face outward along the radial direction of the stator core or inward along the radial direction of the stator core.

[0014] In the above technical solution, the number of the stator teeth is multiple, and the multiple stator teeth are distributed at intervals along the circumferential direction of the stator core, and the number of the connection structures is equal to and corresponds to the number of the stator teeth one by one.

[0015] The number of the stator teeth is multiple, and the multiple stator teeth are distributed at intervals along the circumferential direction of the stator yoke and are respectively connected to the stator yoke through corresponding connection structures to ensure the integrity of the stator core. The multiple stator teeth are beneficial to increasing the number of windings, and then contribute to improving the power level of the stator core. Further, the multiple stator teeth are evenly distributed along the circumferential direction of the stator yoke, making the structure of the stator core more regular and facilitating processing and forming.

[0016] In the above technical solution, the first connecting portion and the second connecting portion of the same connection structure are parallel to each other, and the first connecting portion of any connection structure and the second connecting portion of the adjacent connection structure are arranged in a V shape; or, the first connecting portion and the second connecting portion of the same connection structure are arranged in a V shape, and the first connecting portion of any connection structure and the second connecting portion of the adjacent connection structure are parallel to each other.

[0017] The first connecting portion and the second connecting portion of the same connecting structure are parallel to each other. The first connecting portion of any connecting structure and the second connecting portion of the adjacent connecting structure are arranged in a V shape. Then, the first tooth portion and the second tooth portion of the same stator tooth are parallel to each other, and the first tooth portion of any stator tooth and the second tooth portion of the adjacent stator tooth are arranged in a V shape. This facilitates adjusting the parallel tooth slot pitch between the first tooth portion and the second tooth portion of the same stator tooth, thereby effectively improving the sinusoidality of the back electromotive force of the motor and reducing the cogging torque.

[0018] Alternatively, the first connecting portion and the second connecting portion of the same connecting structure are arranged in a V shape, and the first connecting portion of any connecting structure and the second connecting portion of the adjacent connecting structure are parallel to each other. Then, the first tooth portion and the second tooth portion of the same stator tooth are arranged in a V shape, and the first tooth portion of any stator tooth and the second tooth portion of the adjacent stator tooth are parallel to each other. This forms a relatively regular rectangular space between adjacent stator teeth, facilitating the regular arrangement of the stator winding package and improving the slot fill factor of the axial motor.

[0019] In the above technical solution, the shapes of the multiple stator teeth are the same, and the multiple stator teeth are evenly distributed along the circumferential direction of the stator core. The multiple connecting structures are adapted to the multiple stator teeth.

[0020] Since the shapes of the multiple stator teeth are the same, the multiple stator teeth can be prepared using the same stator punching sheet, which is beneficial to reducing the types of stator punching sheets and lowering the processing difficulty. At the same time, since the multiple stator teeth are evenly distributed along the circumferential direction of the stator core, the shapes of the multiple connecting structures are the same and are also evenly distributed along the circumferential direction of the stator core. This makes the structure of the product more regular, facilitating both processing and assembly.

[0021] In any of the above technical solutions, the stator yoke is detachably connected to the stator teeth.

[0022] The detachable connection between the stator yoke and the stator teeth enables the winding to be wound without being restricted by the shape of the stator core. Each stator tooth can be connected to the stator yoke after the winding is completed. The winding method is flexible, improving the winding efficiency. In addition, by reasonably arranging the size of the stator teeth or the spacing between the stator teeth, the size of the winding slot can be adjusted, enabling the number of winding sets to be flexibly set and the power rating of the stator core to be reasonably adjusted.

[0023] Of course, the stator teeth and the stator yoke can also be integrally formed by bonding or other means, that is, they are non-detachable after assembly.

[0024] In any of the above technical solutions, the connection structure includes a stator yoke slot, the stator yoke slot includes a first sub-slot and a second sub-slot that are circumferentially spaced along the stator core, and the first sub-slot and the second sub-slot respectively form the first connection portion and the second connection portion; a part of the first tooth portion is embedded in the first sub-slot, and a part of the second tooth portion is embedded in the second sub-slot.

[0025] When the connection structure adopts the stator yoke slot method, during assembly, the tooth body of the stator tooth is directly passed through the stator yoke slot adapted to its shape, and the rapid assembly of the stator tooth and the stator yoke portion can be realized, effectively improving the assembly efficiency of the stator tooth and the stator yoke portion. Since the stator tooth includes a first tooth portion and a second tooth portion that are circumferentially spaced along the stator core, the stator yoke slot correspondingly includes a first sub-slot and a second sub-slot that are circumferentially spaced along the stator core to respectively connect the first tooth portion and the second tooth portion of the same stator tooth. Further, the first sub-slot and the second sub-slot can adopt rectangular slots and be arranged in a parallel or V-shaped arrangement, so that the first tooth portion and the second tooth portion are parallel to each other or arranged in a V shape.

[0026] Of course, the connection structure is not limited to the stator yoke slot method. For example, it can also be a boss. A boss is provided on the stator yoke portion. The boss correspondingly includes a first boss and a second boss. The first boss and the second boss respectively form the first connection portion and the second connection portion. Grooves or card slots are correspondingly provided on the first tooth portion and the second tooth portion. By using the snap-fit of the boss and the corresponding tooth portion, the rapid assembly of the stator tooth and the stator yoke portion can be realized, which is beneficial to improving the assembly efficiency of the stator tooth and the stator yoke portion. Further, the stator yoke portion can also be provided with a stator yoke slot (including a first sub-slot and a second sub-slot) and a boss (including a first boss and a second boss) at the same time. When the stator tooth and the stator yoke portion are assembled, the first tooth portion and the second tooth portion of each stator tooth are directly passed through the sub-slot adapted to its shape and snapped onto the corresponding boss. Even a part of multiple stator teeth can be passed through the stator yoke slot, and the remaining stator teeth are snapped onto the boss. Any of the above methods can realize the rapid assembly of the stator tooth and the stator yoke portion, effectively improving the assembly efficiency of the stator tooth and the stator yoke portion.

[0027] In the above technical solution, the stator yoke slot penetrates at least one axial end face of the stator yoke portion; and / or, the stator yoke slot has a spacing from the inner circumferential surface and the outer circumferential surface of the stator yoke portion in the radial direction of the stator core; or, the stator yoke slot penetrates the inner circumferential surface and / or the outer circumferential surface of the stator yoke portion.

[0028] The stator yoke slots can penetrate one end face of the stator yoke axially, or can penetrate both end faces of the stator yoke axially, that is, the stator teeth can be inserted into the stator yoke slots penetrating one end face of the stator yoke, or can be inserted into the stator yoke slots penetrating both end faces of the stator yoke, so that the connection mode between the stator teeth and the stator yoke is diverse, and the assembly mode of the winding is relatively flexible, thus meeting the different needs of users.

[0029] There is a gap between the stator yoke slots and the inner circumferential surface and the outer circumferential surface of the stator yoke in the radial direction, that is: the stator yoke slots penetrate the stator yoke axially and are not directly connected to the inner circumferential surface and the outer circumferential surface of the stator yoke, then the stator teeth are inserted into the stator yoke slots along the axis direction of the stator yoke to be connected with the stator yoke, avoiding the stator teeth from separating from the stator yoke along the outer circumferential surface or the inner circumferential surface of the stator yoke in the stator yoke slots, and improving the connection reliability between the stator teeth and the stator yoke.

[0030] The stator yoke slots can also penetrate the inner circumferential surface of the stator yoke in the radial direction, and there is a gap in the radial direction with the outer circumferential surface of the stator yoke, then the stator teeth can be inserted into the stator yoke slots from the inner circumferential surface of the stator yoke in the radial direction, and the connection mode is flexible, which is convenient for the assembly between the stator teeth and the stator yoke.

[0031] The stator yoke slots can also penetrate the outer circumferential surface of the stator yoke in the radial direction, and there is a gap in the radial direction with the inner circumferential surface of the stator yoke, then the stator teeth can be inserted into the stator yoke slots from the outer circumferential surface of the stator yoke in the radial direction, and the connection mode is flexible, which is convenient for the assembly between the stator teeth and the stator yoke.

[0032] The stator yoke slots can also penetrate the inner circumferential surface and the outer circumferential surface of the stator yoke in the radial direction, that is: the stator yoke slots are directly connected to both the outer circumferential surface and the inner circumferential surface of the stator yoke at the same time, then the stator teeth can be inserted into the stator yoke slots from the outer circumferential surface or the inner circumferential surface axially or radially to form a complete stator core, and the connection mode is flexible, which is convenient for the assembly between the stator teeth and the stator yoke.

[0033] It can be understood that since the stator yoke slots include the first sub-slots and the second sub-slots arranged at intervals along the circumferential direction of the stator core, the above solutions are also equivalent to:

[0034] The first sub-slots penetrate at least one axial end face of the stator yoke, and the second sub-slots penetrate at least one axial end face of the stator yoke; and / or

[0035] The first sub-slots have a gap in the radial direction of the stator core with the inner circumferential surface and the outer circumferential surface of the stator yoke, and the second sub-slots have a gap in the radial direction of the stator core with the inner circumferential surface and the outer circumferential surface of the stator yoke; or, the first sub-slots penetrate the inner circumferential surface and / or the outer circumferential surface of the stator yoke, and the second sub-slots penetrate the inner circumferential surface and / or the outer circumferential surface of the stator yoke.

[0036] In any of the above technical solutions, the outer peripheral surface of the stator yoke extends radially outward to form a stator boss; and / or, the inner peripheral surface of the stator yoke extends radially inward to form a stator boss.

[0037] The outer peripheral surface of the stator yoke extends radially outward to form a stator boss, that is, the stator boss is located on the outer peripheral surface of the stator yoke, which is convenient for connecting with the housing or other structures near the outer peripheral surface.

[0038] The inner peripheral surface of the stator yoke extends radially inward to form a stator boss, that is, the stator boss is located on the inner peripheral surface of the stator yoke, which is convenient for connecting with the structures near the inner peripheral surface.

[0039] In the above technical solution, the number of the stator bosses is multiple, and the multiple stator bosses are circumferentially spaced along the stator core.

[0040] Adopting multiple stator bosses circumferentially spaced along the stator core is convenient for the stator core to be connected with other structures at multiple positions, which is beneficial to improving the force balance and connection stability of the stator yoke. Further, the multiple stator bosses are evenly distributed along the circumference of the stator yoke, which makes the structure of the stator core more regular.

[0041] In the above technical solution, through holes are provided on the stator bosses.

[0042] Providing through holes on the stator bosses can be used for edge welding of the stator yoke, or for facilitating the fixed connection between the stator yoke and structures such as the housing, or for winding wire passing.

[0043] In any of the above technical solutions, through holes are provided on the stator yoke, and the through holes are located between two adjacent stator teeth.

[0044] Providing through holes on the stator yoke and the through holes being located between two adjacent stator teeth can be used for edge welding of the stator yoke, or for facilitating the fixed connection between the stator yoke and the housing or other structures, or for winding wire passing.

[0045] In the above technical solution, the number of the through holes is multiple, and the multiple through holes are circumferentially spaced along the stator yoke.

[0046] Circumferentially spacing multiple through holes on the stator yoke is beneficial to both the assembly of the stator core and the improvement of the connection strength between the stator core and other structures, and is also beneficial to winding the stator core. Further, the multiple stator teeth are evenly distributed radially along the stator yoke, and any through hole is provided at the middle position (i.e., the angular bisector) between two adjacent stator teeth.

[0047] In any of the above technical solutions, the stator yoke is an integral structure; or, the stator yoke includes a plurality of split sub-yokes, and the plurality of sub-yokes are spliced to form the stator yoke.

[0048] The stator yoke can be a single piece and integrally formed, which is beneficial to improving the integrity of the product and the assembly efficiency. The stator yoke can also be formed by splicing a plurality of sub-yokes, which is beneficial to improving the material utilization rate of the stator yoke.

[0049] In any of the above technical solutions, the first tooth portion includes a first body portion and a first tip portion connected to the end face of the first body portion, and the first body portion is connected to the stator yoke through the first connecting portion; the second tooth portion includes a second body portion and a second tip portion connected to the end face of the second body portion, and the second body portion is connected to the stator yoke through the second connecting portion; the first body portion and the second body portion together form the tooth body of the stator tooth, and the first tip portion and the second tip portion together form the tooth tip of the stator tooth.

[0050] The first tooth portion includes a first body portion and a first tip portion, the second tooth portion includes a second body portion and a second tip portion, the first body portion and the second body portion form the tooth body of the stator tooth, and the first tip portion and the second tip portion form the tooth tip of the stator tooth. The setting of the tooth tip can significantly increase the contact area between the stator tooth and the rotor permanent magnet, thereby improving the utilization rate of the rotor permanent magnet and being beneficial to improving the back electromotive force of the motor and reducing the cogging torque.

[0051] In the above technical solution, the first body portion and the second body portion have the same shape and size.

[0052] If the first body portion and the second body portion have the same shape and size, the first body portion and the second body portion can be prepared by using the same stator punching sheet, which is beneficial to reducing the types of stator punching sheets, reducing the processing difficulty, and improving the installation speed.

[0053] In the above technical solution, the first tip portion extends away from the second body portion, the second tip portion extends away from the first body portion, and the first tip portion and the second tip portion are symmetric with each other.

[0054] The first tip portion and the second tip portion extend in directions away from each other. In other words, the first tip portion and the second tip portion extend outwards, which can reduce the distance between the first body portion and the second body portion and increase the space between adjacent stator teeth, facilitating winding. The first tip portion and the second tip portion are symmetric with each other, making the structure of the stator tooth more regular.

[0055] In the above technical solution, the number of tooth tips is one, and one tooth tip is provided on one end face of the tooth body; or, the number of tooth tips is two, and two tooth tips are provided on two opposite end faces of the tooth body.

[0056] The number of tooth tips on each tooth body can be adjusted according to actual requirements. Specifically, one tooth tip can be provided on the tooth body of a stator, and two tooth tips can also be provided on the tooth body of a stator. The two tooth tips can be respectively provided on the two end faces of the tooth body.

[0057] It can be understood that since the stator tooth includes a first tooth portion and a second tooth portion that are circumferentially spaced along the stator core, the above solution is also equivalent to:

[0058] The number of the first tip portions is one, one first tip portion is provided on one end face of the first body portion, the number of the second tip portions is one, one second tip portion is provided on one end face of the second body portion and is correspondingly arranged with the first tip portion; or

[0059] The number of the first tip portions is two, two first tip portions are provided on the two end faces of the first body portion that are arranged back to back, the number of the second tip portions is two, and two second tip portions are provided on the two end faces of the second body portion that are arranged back to back.

[0060] In the above technical solution, the first tip portion includes a plurality of sub-tip portions, the plurality of sub-tip portions are arranged radially along the stator core, and at least one end face at both ends in the circumferential direction of the stator core of adjacent sub-tip portions is staggered from each other, so that at least one end of the first tip portion in the circumferential direction of the stator core forms a stepped structure; and / or, the second tip portion includes a plurality of sub-tip portions, the plurality of sub-tip portions are arranged radially along the stator core, and at least one end face at both ends in the circumferential direction of the stator core of adjacent sub-tip portions is staggered from each other, so that at least one end of the second tip portion in the circumferential direction of the stator core forms a stepped structure.

[0061] Dividing the first tip portion into a plurality of sub-tip portions, since the plurality of sub-tip portions are arranged radially along the stator core, and at least one end face at both ends in the circumferential direction of the stator core of adjacent sub-tip portions of the same first tooth portion is staggered from each other, a stepped structure is formed on the end face at least one end of the first tip portion in the circumferential direction of the stator core. Compared with the flat end face in the prior art, the stepped end face is convenient for reasonably utilizing the space between adjacent stator teeth or adjacent tooth portions of the same stator tooth according to the specific structure of the motor, thereby being beneficial to increasing the contact area between the stator tooth and the rotor permanent magnet, and further improving the utilization rate of the rotor permanent magnet, thereby improving the torque density of the motor. At the same time, it is also convenient to reasonably adjust the width of each part in the radial direction of the slot mouth between adjacent tooth tips on the stator core by using the stepped end face to reduce the introduction of harmonics, thereby effectively improving the back electromotive force of the motor, reducing the cogging torque of the motor, and being beneficial to the application expansion of the axial motor.

[0062] In addition, since the stator teeth have a certain thickness, a plurality of stator laminations can be stacked and formed in the thickness direction thereof. In the present application, the first tip is divided into a plurality of sub-tips so that the end face of the first tooth portion forms a stepped structure. Compared with the solution using trapezoidal tooth tips (in this solution, the sizes of adjacent stator laminations are all different but the differences are small, so that the overall tooth tip formed by stacking is a trapezoidal structure, and the two end faces of the tooth tip along the circumferential direction of the stator core are basically inclined surfaces, rather than the stepped surface of the present application), the types of stator laminations used for the stacked forming of the first tooth portion can be significantly reduced, thereby improving the processability of the first tooth portion and reducing the processing difficulty of the first tooth portion. For example: when the number of sub-tips is three, only three sizes of stator laminations need to be selected, stacked and formed into three pieces respectively, and then stacked together to form a complete first tooth portion. The plurality of sub-tips can be stacked to form a stepped shape by using stator laminations with corresponding shapes. Compared with trapezoidal stator tooth tips, the types of laminations can be reduced, which is convenient for processing and forming.

[0063] Among them, the thickness D (such as D1, D2, D3, etc.) of each sub-tip can be flexibly adjusted according to specific use scenarios and processing and performance optimization requirements.

[0064] The second tip is the same as the first tip and will not be elaborated here.

[0065] In the above technical solution, the span L along the circumferential direction of the stator core of adjacent sub-tips of the same first tooth portion or the second tooth portion is different, so that at least one of the end faces at both ends of the adjacent sub-tips along the circumferential direction of the stator core is staggered.

[0066] The inconsistent spans L of the plurality of sub-tips are convenient for flexible adjustment according to specific use scenarios and processing and performance optimization requirements.

[0067] In the above technical solution, along the radial direction of the stator core from inside to outside, the span L of the sub-tips along the circumferential direction of the stator core gradually increases.

[0068] Along the radial direction of the stator core from inside to outside, the span L (such as L1, L2, L3, etc.) of the sub-tips along the circumferential direction of the stator core gradually increases, which can effectively improve the situation in the prior art that the slot opening distance between adjacent stator tooth tips of an axial flux motor increases with the increase of the outer diameter of the stator yoke. Therefore, it is beneficial to improve the utilization rate of the rotor permanent magnet and also beneficial to reduce the introduction of harmonics, thereby avoiding the reduction of the sine degree of the back electromotive force and the increase of the cogging torque ripple, which is beneficial to the application expansion of the axial motor.

[0069] In the above technical solution, the minimum distance S between the corresponding sub-tips of any adjacent stator teeth is equal.

[0070] The minimum distance S between the sub-tips corresponding to any adjacent stator teeth is equal, making the structure of the product more regular, facilitating processing and shaping, and being more aesthetically pleasing. Of course, the minimum distance S between the sub-tips corresponding to adjacent stator teeth can also be unequal. For example, it can gradually increase in the radially outward direction and can be flexibly adjusted according to specific usage scenarios and processing performance optimization requirements.

[0071] In any of the above technical solutions, a positioning portion is provided on the tooth body for adapting to a mating portion provided on the stator yoke portion; wherein, the positioning portion includes a positioning protrusion for adapting to the mating portion configured as a positioning groove; and / or, the positioning portion includes a positioning groove for adapting to the mating portion configured as a positioning protrusion.

[0072] By providing a positioning portion on the tooth body and correspondingly providing a mating portion on the stator yoke portion, during assembly, the cooperation between the positioning portion and the mating portion can play a good positioning role and a limiting role, which is beneficial to the rapid assembly of the tooth body and the stator yoke portion.

[0073] Inserting the positioning protrusion into the positioning groove can effectively prevent relative movement between the stator teeth and the stator yoke portion, realize the rapid assembly of the tooth body and the stator yoke portion, and improve the connection stability between the stator teeth and the stator yoke portion; moreover, the structures of the positioning protrusion and the positioning groove are relatively simple and are convenient for processing and shaping. Optionally, the positioning protrusion is a positioning rib that extends along the radial direction of the stator core.

[0074] In the above technical solution, the positioning portion is provided on both the first tooth portion and the second tooth portion.

[0075] Both the first tooth portion and the second tooth portion are provided with the positioning portion, ensuring that both the first tooth portion and the second tooth portion can be rapidly and well assembled with the stator yoke portion.

[0076] The technical solution of the second aspect of the present invention provides a stator including the stator core according to any one of the technical solutions in the first aspect.

[0077] The stator provided by the technical solution of the second aspect of the present invention, because it includes the stator core according to any one of the technical solutions in the first aspect, thus has all the beneficial effects of any of the above technical solutions and will not be elaborated herein.

[0078] Specifically, the winding of the stator is wound around the tooth body of the stator core.

[0079] Furthermore, the winding is wound around the tooth body of the stator tooth and is located on the end face of the stator yoke portion. Among them, there can be multiple windings, and the wire bundle shapes between the multiple windings can be the same or different. The winding can be one set, two sets, or multiple sets.

[0080] A technical solution according to the third aspect of the present invention provides a motor, comprising: at least one stator as described in the technical solution of the second aspect; and at least one rotor, each rotor being correspondingly arranged with the stator.

[0081] Since the motor provided by the technical solution of the third aspect of the present invention includes the stator provided by the technical solution of the second aspect, it has all the beneficial effects of any of the above technical solutions, which will not be elaborated herein.

[0082] It should be noted that the types of motors include but are not limited to single-stator single-rotor motors, single-stator double-rotor motors, single-rotor double-stator motors, and double-stator double-rotor motors. The number of stators and the number of rotors can both be one or more.

[0083] In the above technical solution, the number of stators is less than the number of rotors, and any one of the stators is arranged between two adjacent rotors; or, the number of stators is greater than the number of rotors, and any one of the rotors is arranged between two adjacent stators.

[0084] When the number of stators is less than the number of rotors, any two adjacent rotors share one stator, and the structure is relatively regular, which helps to simplify the structure of the product and facilitates the assembly of the rotor and the stator.

[0085] Or, when the number of stators is greater than the number of rotors, any two adjacent stators share one rotor, and the structure is relatively regular, which helps to simplify the structure of the product and facilitates the assembly of the rotor and the stator.

[0086] It can be understood that the number of stators is denoted as the first number, and the number of rotors is denoted as the second number. When the number of rotors is greater than the number of stators, and when the second number is N + 1 and the first number is N, the N + 1 rotors can be arranged at intervals first, and then the N stators can be inserted between two adjacent rotors respectively to form a motor.

[0087] Or, when the number of stators is greater than the number of rotors, and when the second number is N and the first number is N + 1, the N + 1 stators can be arranged at intervals first, and then the N rotors can be inserted between two adjacent stators respectively to form a motor.

[0088] In the above technical solution, the number of stators is at least two, and the number of stator teeth of at least two stators is the same, or the number of phases of at least two stators is the same; or, the number of stators is at least two, and the number of stator teeth of at least two stators is different, or the number of phases of at least two stators is different.

[0089] The number of stators is at least two, and the number of stator teeth of at least two stators is the same, which is convenient for the assembly of the stator teeth and the stator yoke, or the number of phases of at least two stators is the same, that is, the number of windings on each stator is the same, so that the power rating on each stator is the same.

[0090] The number of stators is at least two, and the number of stator teeth of at least two stators is different, or the number of phases of at least two stators is different, that is, the number of windings on each stator is different. In this way, users can reasonably wind each stator to meet the actual power requirements.

[0091] In the above technical solution, the rotor is a permanent magnet rotor or a squirrel-cage rotor or a salient-pole rotor; and / or, the number of rotors is multiple, and the number of pole pairs of the multiple rotors is the same or different, and the multiple rotors rotate independently of each other.

[0092] If the number of rotors is set to be multiple, the rotating shafts of at least two rotors can be coaxially arranged, or parallel arranged, or vertically arranged, with various setting methods and relatively flexible installation methods.

[0093] Among them, the one or more rotors can be a permanent magnet rotor or a squirrel-cage rotor or a salient-pole rotor, and the number of pole pairs of at least two of the rotors is different, or the number of pole pairs of at least two of the rotors is the same.

[0094] The number of rotors is multiple, and at least two rotors can be set with the same number of pole pairs or different numbers of pole pairs to meet the needs of different working conditions.

[0095] In the above technical solution, the rotor is a permanent magnet rotor, and the permanent magnet rotor includes a rotor yoke and permanent magnet steel. The permanent magnet steel is surface-mounted on the rotor yoke and is located between the rotor yoke and the tooth tips of the stator. This solution can meet the specific requirements of the product.

[0096] In the above technical solution, the rotor is a permanent magnet rotor, and the permanent magnet rotor only includes a plurality of permanent magnet steels. The permanent magnet steels are magnetized in the Halbach array, and the plurality of permanent magnet steels are arranged in a ring and are formed into an integral structure by injection molding. This solution saves the material usage of the rotor yoke.

[0097] The technical solution of the fourth aspect of the present invention provides a fan, including the motor according to any one of the technical solutions in the third aspect.

[0098] The fan provided by the technical solution of the fourth aspect of the present invention has all the beneficial effects of any of the above technical solutions because it includes the motor according to any one of the technical solutions in the third aspect, and will not be elaborated here.

[0099] Specifically, the motor is installed in the housing of the blower. Further, the blower includes an impeller, and the impeller is fixedly connected to the output shaft of the motor.

[0100] Of course, the motor provided by this application can also be used on vehicles, compressors, or other devices.

[0101] The additional aspects and advantages of the present invention will become apparent in the following description section, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0102] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0103] Figure 1 is a perspective structural schematic diagram of a stator core according to an embodiment of the present invention;

[0104] Figure 2 is Figure 1 a top view structural schematic diagram of the shown stator core;

[0105] Figure 3 is a perspective structural schematic diagram of a stator core according to an embodiment of the present invention;

[0106] Figure 4 is Figure 3 a top view structural schematic diagram of the shown stator core;

[0107] Figure 5 is a perspective structural schematic diagram of a stator core according to an embodiment of the present invention;

[0108] Figure 6 is Figure 5 a top view structural schematic diagram of the shown stator core;

[0109] Figure 7 is a perspective structural schematic diagram of a stator core according to an embodiment of the present invention;

[0110] Figure 8 is Figure 7 a top view structural schematic diagram of the shown stator core;

[0111] Figure 9 is a perspective structural schematic diagram of a stator core according to an embodiment of the present invention;

[0112] Figure 10 is a structural schematic diagram of a stator yoke according to an embodiment of the present invention;

[0113] Figure 11 is a structural schematic diagram of a stator yoke according to an embodiment of the present invention;

[0114] Figure 12 It is a schematic structural diagram of a stator yoke according to an embodiment of the present invention;

[0115] Figure 13 It is a schematic structural diagram of a stator yoke according to an embodiment of the present invention;

[0116] Figure 14 It is a schematic structural diagram of a stator yoke according to an embodiment of the present invention;

[0117] Figure 15 It is a schematic structural diagram of a stator yoke according to an embodiment of the present invention;

[0118] Figure 16 It is a schematic structural diagram of a stator tooth according to an embodiment of the present invention;

[0119] Figure 17 It is a schematic structural diagram of a first tooth portion of a stator tooth according to an embodiment of the present invention;

[0120] Figure 18 It is a schematic structural diagram of a first tooth portion of a stator tooth according to an embodiment of the present invention;

[0121] Figure 19 It is a schematic structural diagram of a first tooth portion of a stator tooth according to an embodiment of the present invention;

[0122] Figure 20 It is a partial assembly schematic diagram of a single-stator single-rotor motor according to an embodiment of the present invention;

[0123] Figure 21 It is a partial assembly schematic diagram of a single-stator single-rotor motor according to an embodiment of the present invention;

[0124] Figure 22 It is a partial assembly schematic diagram of a single-stator double-rotor motor according to an embodiment of the present invention;

[0125] Figure 23 It is a partial assembly schematic diagram of a single-stator double-rotor motor according to an embodiment of the present invention.

[0126] Among them, Figures 1 to 23 The corresponding relationship between the reference numerals and the component names in

[0127] Motor 1;

[0128] Stator 2, rotor 3;

[0129] Stator core 20, winding 21, stator tooth 22, first tooth portion 221, second tooth portion 222, stator yoke 23; first rotor yoke 31, first permanent magnet 32, second rotor yoke 33, second permanent magnet 34;

[0130] Stator yoke slot 231, first sub-slot 2311, second sub-slot 2312, yoke end face 232, stator boss 233, through hole 234;

[0131] Positioning protrusion 220, tooth body 2201, tooth tip 2202, first sub-tip 2211, second sub-tip 2212, third sub-tip 2213, first tip 2214, second tip 2215, first body part 2216, second body part 2217. Detailed implementation manners

[0132] In order to more clearly understand the above-mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0133] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0134] Next, refer to Figures 1 to 23 Describe the stator core, stator, motor, and fan according to some embodiments of the present invention.

[0135] First, introduce the embodiments of the first aspect, specifically the stator core.

[0136] Embodiment 1

[0137] A stator core 20 includes: a stator yoke 23 and stator teeth 22.

[0138] Specifically, the stator yoke 23 is provided with a connection structure for connecting the stator teeth 22. The connection structure includes a first connection portion (such as the following first sub-slot 2311 and / or first boss) and a second connection portion (such as the following second sub-slot 2312 and / or second boss) that are arranged at intervals along the circumferential direction of the stator core 20.

[0139] The stator teeth 22 are arranged on the stator yoke 23 and include a first tooth portion 221 and a second tooth portion 222 that are arranged at intervals along the circumferential direction of the stator core 20, as Figures 1 to 8 shown. The first tooth portion 221 is connected to the stator yoke 23 through the first connection portion, the second tooth portion 222 is connected to the stator yoke 23 through the second connection portion, and the first tooth portion 221 and the second tooth portion 222 together form the tooth body 2201 of the stator teeth 22. The tooth body 2201 extends along the axial direction of the stator yoke and is for the same winding 21 to wind around.

[0140] The stator core 20 provided in this embodiment is applicable to an axial motor. Its stator teeth 22 include a first tooth portion 221 and a second tooth portion 222 that are circumferentially spaced along the stator core 20. The connection structure on the stator yoke portion 23 for connecting the stator teeth 22 also correspondingly includes a first connection portion and a second connection portion that are circumferentially spaced along the stator core 20. The first tooth portion 221 is connected to the first connection portion, and the second tooth portion 222 is connected to the second connection portion, realizing the connection between the stator teeth 22 and the stator yoke portion 23 and ensuring the integrity of the stator core 20.

[0141] Since the first tooth portion 221 and the second tooth portion 222 are circumferentially spaced along the stator core 20, it is equivalent to splitting the integral stator teeth 22 in the prior art. As a result, the winding 21 wound around the stator teeth 22 is equivalent to adopting a cross-tooth winding method. Compared with the single-tooth winding method in the prior art, it is beneficial to eliminate low-order harmonics, thereby improving the sinusoidality of the back electromotive force of the motor 1 and reducing the cogging torque ripple, which is beneficial to reducing the cogging torque and further reducing the vibration and noise of the motor 1.

[0142] Among them, the materials of the stator teeth 22 and the stator yoke portion 23 can be silicon steel sheets. All other solutions that can achieve the purpose of the present invention should be within the protection scope of the present invention.

[0143] Optionally, the first connection portion and the second connection portion are parallel to each other, making the first tooth portion 221 and the second tooth portion 222 parallel to each other, as Figures 7 to 9 shown.

[0144] If the first connection portion and the second connection portion are parallel to each other, the adapted first tooth portion 221 and the second tooth portion 222 are parallel to each other, which facilitates adjusting the parallel tooth groove pitch between the first tooth portion 221 and the second tooth portion 222 (as Figure 7 and Figure 8 shown, the distance H between the first tooth portion 221 and the second tooth portion 222 remains unchanged along the radial direction of the stator yoke), thereby effectively improving the sinusoidality of the back electromotive force of the motor 1 and reducing the cogging torque.

[0145] Furthermore, the number of stator teeth 22 is multiple, and the multiple stator teeth 22 are circumferentially spaced along the stator core 20, as Figures 1 to 9 shown. The number of the connection structures is equal to and corresponds one by one to the number of stator teeth 22.

[0146] The number of stator teeth 22 is multiple. The multiple stator teeth 22 are circumferentially spaced along the stator yoke 23 and are respectively connected to the stator yoke 23 through corresponding connection structures, ensuring the integrity of the stator core 20. The multiple stator teeth 22 are beneficial to increasing the number of windings 21, and thus contribute to improving the power rating of the stator core 20. Further, the multiple stator teeth 22 are evenly distributed circumferentially around the stator yoke 23, making the structure of the stator core 20 more regular and facilitating processing and forming.

[0147] Further, the first connection part and the second connection part of the same connection structure are parallel to each other, and the first connection part of any connection structure and the second connection part of the adjacent connection structure are arranged in a V shape, as Figures 7 to 9 shown.

[0148] If the first connection part and the second connection part of the same connection structure are parallel to each other, and the first connection part of any connection structure and the second connection part of the adjacent connection structure are arranged in a V shape, then the first tooth part 221 and the second tooth part 222 of the same stator tooth 22 are parallel to each other, and the first tooth part 221 of any stator tooth 22 and the second tooth part 222 of the adjacent stator tooth 22 are arranged in a V shape. This facilitates adjusting the parallel tooth groove pitch between the first tooth part 221 and the second tooth part 222 of the same stator tooth 22, thereby effectively improving the sinusoidality of the back electromotive force of the motor 1 and reducing the cogging torque.

[0149] Embodiment 2

[0150] The difference from Embodiment 1 is that: the first connection part and the second connection part are arranged in a V shape, making the first tooth part 221 and the second tooth part 222 arranged in a V shape, as Figures 1 to 6 shown.

[0151] If the first connection part and the second connection part are arranged in a V shape, then the adapted first tooth part 221 and the second tooth part 222 are also arranged in a V shape, which is beneficial to increasing the end face area of the tooth body 2201, and further increasing the contact area between the tooth tip 2202 and the permanent magnet of the rotor 3, which is beneficial to improving the utilization rate of the permanent magnet of the rotor 3 and further improving the back electromotive force of the motor 1 and further reducing the cogging torque. Among them, the V-shaped opening can face outward along the radial direction of the stator core 20 or inward along the radial direction of the stator core 20.

[0152] Among them, the first connection part and the second connection part of the same connection structure are arranged in a V shape, and the first connection part of any connection structure and the second connection part of the adjacent connection structure are parallel to each other, as Figures 1 to 6 shown.

[0153] The first connecting part and the second connecting part of the same connecting structure are arranged in a V shape, and the first connecting part of any connecting structure is parallel to the second connecting part of the adjacent connecting structure. Then, the first tooth part 221 and the second tooth part 222 of the same stator tooth 22 are arranged in a V shape, and the first tooth part 221 of any stator tooth 22 is parallel to the second tooth part 222 of the adjacent stator tooth 22 (as Figures 1 to 6 shown, the distance H between the first tooth part 221 of any stator tooth 22 and the second tooth part 222 of the adjacent stator tooth 22 remains unchanged along the radial direction of the stator yoke). This makes a relatively regular rectangular space formed between adjacent stator teeth 22, facilitating the regular arrangement of the stator 2 wire windings and improving the slot fill factor of the axial motor 1.

[0154] Furthermore, the shapes of multiple stator teeth 22 are the same, and the multiple stator teeth 22 are evenly distributed along the circumferential direction of the stator core 20. Multiple connecting structures are adapted to the multiple stator teeth 22, as Figures 1 to 9 shown.

[0155] Since the shapes of multiple stator teeth 22 are the same, the multiple stator teeth 22 can be prepared using the same stator punching sheet, which is beneficial to reducing the types of stator punching sheets and lowering the processing difficulty. At the same time, since the multiple stator teeth 22 are evenly distributed along the circumferential direction of the stator core 20, the shapes of the multiple connecting structures are the same and are also evenly distributed along the circumferential direction of the stator core 20. This makes the structure of the product more regular, facilitating both processing and assembly.

[0156] Furthermore, the stator yoke 23 is detachably connected to the stator teeth 22.

[0157] The detachable connection between the stator yoke 23 and the stator teeth 22 enables the winding 21 to be wound without being restricted by the shape of the stator core 20. Each stator tooth 22 can be connected to the stator yoke 23 after the winding 21 is wound. The winding method is flexible, improving the winding efficiency of the winding 21. In addition, by reasonably arranging the size of the stator teeth 22 or the distance between the stator teeth 22, the size of the winding slot can be adjusted, enabling the number of windings of the winding 21 to be flexibly set and the power rating of the stator core 20 to be reasonably adjusted.

[0158] Of course, the stator teeth 22 and the stator yoke 23 can also be integrally formed by bonding or other means, that is, the stator teeth and the stator yoke are non-detachable after assembly.

[0159] Optionally, the connecting structure includes a stator yoke slot 231. The stator yoke slot 231 includes a first sub-slot 2311 and a second sub-slot 2312 that are spaced apart along the circumferential direction of the stator core 20, as Figures 10 to 15As shown. The first sub-slot 2311 and the second sub-slot 2312 respectively form a first connecting portion and a second connecting portion; a part of the first tooth portion 221 is embedded in the first sub-slot 2311, and a part of the second tooth portion 222 is embedded in the second sub-slot 2312.

[0160] When the connection structure adopts the stator yoke slot 231, during assembly, the tooth body 2201 of the stator tooth 22 is directly passed through the stator yoke slot 231 adapted to its shape, and thus the rapid assembly of the stator tooth 22 and the stator yoke portion 23 can be realized, effectively improving the assembly efficiency of the stator tooth 22 and the stator yoke portion 23. Since the stator tooth 22 includes the first tooth portion 221 and the second tooth portion 222 that are circumferentially spaced apart along the stator core 20, the stator yoke slot 231 also correspondingly includes the first sub-slot 2311 and the second sub-slot 2312 that are circumferentially spaced apart along the stator core 20 to respectively connect the first tooth portion 221 and the second tooth portion 222 of the same stator tooth 22.

[0161] Furthermore, the first sub-slot 2311 and the second sub-slot 2312 can adopt rectangular slots and are arranged in a parallel or V-shaped arrangement, so that the first tooth portion 221 and the second tooth portion 222 are parallel to each other or arranged in a V shape.

[0162] Of course, the connection structure is not limited to the stator yoke slot 231. For example, it can also be a boss. A boss is provided on the stator yoke portion 23. The boss correspondingly includes a first boss and a second boss. The first boss and the second boss respectively form a first connecting portion and a second connecting portion. Grooves or chucks are correspondingly provided on the first tooth portion 221 and the second tooth portion 222. By using the clamping fit between the boss and the corresponding tooth portion, the rapid assembly of the stator tooth 22 and the stator yoke portion 23 can be realized, which is beneficial to improving the assembly efficiency of the stator tooth 22 and the stator yoke portion 23.

[0163] Furthermore, the stator yoke portion 23 can also be provided with a stator yoke slot 231 (including the first sub-slot 2311 and the second sub-slot 2312) and a boss (including the first boss and the second boss) at the same time. When the stator tooth 22 is assembled with the stator yoke portion 23, the first tooth portion 221 and the second tooth portion 222 of each stator tooth 22 are directly passed through the sub-slot adapted to its shape and are clamped with the corresponding boss. Even a part of multiple stator teeth 22 can be arranged through the stator yoke slot 231, and the remaining stator teeth 22 are clamped with the boss. Any of the above methods can realize the rapid assembly of the stator tooth 22 and the stator yoke portion 23, effectively improving the assembly efficiency of the stator tooth 22 and the stator yoke portion 23.

[0164] Optionally, the stator yoke slot 231 penetrates at least one axial end face of the stator yoke portion 23.

[0165] The stator yoke slot 231 can axially penetrate through one end face of the stator yoke 23, or can axially penetrate through both end faces of the stator yoke 23, that is, the stator teeth 22 can be inserted into the stator yoke slot 231 that penetrates through one end face of the stator yoke 23, or can be inserted into the stator yoke slot 231 that penetrates through both end faces of the stator yoke 23, so that the connection method between the stator teeth 22 and the stator yoke 23 is diverse, and the assembly method of the winding 21 is relatively flexible, thereby meeting different needs of users.

[0166] Optionally, the stator yoke slot 231 has a spacing from the inner peripheral surface and the outer peripheral surface of the stator yoke 23 in the radial direction of the stator core 20; or, the stator yoke slot 231 penetrates through the inner peripheral surface and / or the outer peripheral surface of the stator yoke 23.

[0167] The stator yoke slot 231 has a spacing from both the inner peripheral surface and the outer peripheral surface of the stator yoke 23 in the radial direction, that is: the stator yoke slot 231 axially penetrates through the stator yoke 23 and is not directly connected to the inner peripheral surface and the outer peripheral surface of the stator yoke 23, then the stator teeth 22 are inserted into the stator yoke slot 231 along the axial direction of the stator yoke 23 to be connected to the stator yoke 23, avoiding the stator teeth 22 from separating from the stator yoke 23 along the outer peripheral surface or the inner peripheral surface of the stator yoke 23 in the stator yoke slot 231, and improving the connection reliability between the stator teeth 22 and the stator yoke 23.

[0168] The stator yoke slot 231 can also radially penetrate through the inner peripheral surface of the stator yoke 23 and have a spacing from the outer peripheral surface of the stator yoke 23 in the radial direction, then the stator teeth 22 can be radially inserted into the stator yoke slot 231 from the inner peripheral surface of the stator yoke 23, the connection method is flexible, and it is convenient for the assembly between the stator teeth 22 and the stator yoke 23.

[0169] The stator yoke slot 231 can also radially penetrate through the outer peripheral surface of the stator yoke 23 and have a spacing from the inner peripheral surface of the stator yoke 23 in the radial direction, then the stator teeth 22 can be radially inserted into the stator yoke slot 231 from the outer peripheral surface of the stator yoke 23, the connection method is flexible, and it is convenient for the assembly between the stator teeth 22 and the stator yoke 23.

[0170] The stator yoke slot 231 can also radially penetrate through the inner peripheral surface and the outer peripheral surface of the stator yoke 23, that is: the stator yoke slot 231 is directly connected to both the outer peripheral surface and the inner peripheral surface of the stator yoke 23 at the same time, then the stator teeth 22 can be axially or radially inserted into the stator yoke slot 231 from the outer peripheral surface or the inner peripheral surface to form a complete stator core 20, the connection method is flexible, and it is convenient for the assembly between the stator teeth 22 and the stator yoke 23.

[0171] It can be understood that since the stator yoke slot 231 includes the first sub-slot 2311 and the second sub-slot 2312 that are circumferentially spaced apart along the stator core 20, the above scheme is also equivalent to:

[0172] The first sub-slot 2311 penetrates at least one axial end face of the stator yoke 23, and the second sub-slot 2312 penetrates at least one axial end face of the stator yoke 23; and / or

[0173] The first sub-slot 2311 has a spacing from the inner peripheral surface and the outer peripheral surface of the stator yoke 23 in the radial direction of the stator core 20, and the second sub-slot 2312 has a spacing from the inner peripheral surface and the outer peripheral surface of the stator yoke 23 in the radial direction of the stator core 20; alternatively, the first sub-slot 2311 penetrates the inner peripheral surface and / or the outer peripheral surface of the stator yoke 23, and the second sub-slot 2312 penetrates the inner peripheral surface and / or the outer peripheral surface of the stator yoke 23.

[0174] Embodiment 3

[0175] The difference from any of the above embodiments is that: on the basis of any of the above embodiments, further, the outer peripheral surface of the stator yoke 23 extends radially outward to form a stator boss 233, as Figure 11 and Figure 13 shown.

[0176] The outer peripheral surface of the stator yoke 23 extends radially outward to form a stator boss 233, that is, the stator boss 233 is located on the outer peripheral surface of the stator yoke 23, which is convenient for connecting with the housing or other structures near the outer peripheral surface.

[0177] Alternatively, the inner peripheral surface of the stator yoke 23 extends radially inward to form a stator boss 233.

[0178] The inner peripheral surface of the stator yoke 23 extends radially inward to form a stator boss 233, that is, the stator boss 233 is located on the inner peripheral surface of the stator yoke 23, which is convenient for connecting with the structures near the inner peripheral surface.

[0179] Further, the number of the stator bosses 233 is multiple, and the multiple stator bosses 233 are circumferentially spaced apart along the stator core 20, as Figure 11 and Figure 13 shown.

[0180] Adopting multiple stator bosses 233 that are circumferentially spaced apart along the stator core 20 facilitates the connection of multiple parts of the stator core 20 with other structures, which is beneficial to improving the force balance and connection stability of the stator yoke 23. Further, the multiple stator bosses 233 are evenly distributed along the circumferential direction of the stator yoke 23, which makes the structure of the stator core 20 more regular.

[0181] Wherein, through holes 234 are provided on the stator bosses 233, as Figure 11 and Figure 13 shown.

[0182] A through hole 234 is provided on the stator boss 233, which can be used for welding the edge of the stator yoke 23, or facilitating the fixed connection between the stator yoke 23 and structures such as the housing, or for the wire passing of the winding 21.

[0183] In any of the above embodiments, a through hole 234 is provided on the stator yoke 23, and the through hole 234 is located between two adjacent stator teeth 22.

[0184] A through hole 234 is provided on the stator yoke 23, and the through hole 234 is located between two adjacent stator teeth 22, which can be used for welding the edge of the stator yoke 23, or facilitating the fixed connection between the stator yoke 23 and the housing or other structures, or for the wire passing of the winding 21.

[0185] For example: a local inward depression is formed on the outer peripheral surface of the stator yoke 23 to form the through hole 234.

[0186] Among them, the number of the through holes 234 is multiple, and the multiple through holes 234 are distributed at intervals along the circumferential direction of the stator yoke 23.

[0187] A plurality of through holes 234 are arranged at intervals in the circumferential direction of the stator yoke 23, which is beneficial to the assembly of the stator core 20, also beneficial to improving the connection strength between the stator core 20 and other structures, and also beneficial to the winding of the stator core 20. Further, a plurality of stator teeth 22 are evenly distributed along the radial direction of the stator yoke 23, and any through hole 234 is arranged at the middle part (i.e., the angular bisector) between two adjacent stator teeth 22.

[0188] Optionally, the stator yoke 23 is an integral structure.

[0189] Optionally, the stator yoke 23 includes a plurality of split sub-yokes, and the plurality of sub-yokes are spliced to form the stator yoke 23.

[0190] The stator yoke 23 can be a whole piece and integrally formed, which is beneficial to improving the integrity of the product and the assembly efficiency. The stator yoke 23 can also be formed by splicing a plurality of sub-yokes in blocks, which is beneficial to improving the material utilization rate of the stator yoke 23.

[0191] Embodiment 4

[0192] The difference from any of the above embodiments is that: on the basis of any of the above embodiments, as Figures 16 to 19 shown, further, the first tooth portion 221 includes a first body portion 2216 and a first tip portion 2214 connected to the end face of the first body portion 2216, and the first body portion 2216 is connected to the stator yoke 23 through a first connecting portion, as Figure 1 shown; the second tooth portion 222 includes a second body portion 2217 and a second tip portion 2215 connected to the end face of the second body portion 2217, and the second body portion 2217 is connected to the stator yoke 23 through a second connecting portion, as Figure 1As shown; the first body part 2216 and the second body part 2217 together form the tooth body 2201 of the stator tooth 22, and the first tip part 2214 and the second tip part 2215 together form the tooth tip 2202 of the stator tooth 22, as Figure 1 shown.

[0193] The first tooth part 221 includes the first body part 2216 and the first tip part 2214, the second tooth part 222 includes the second body part 2217 and the second tip part 2215. The first body part 2216 and the second body part 2217 form the tooth body 2201 of the stator tooth 22, and the first tip part 2214 and the second tip part 2215 form the tooth tip 2202 of the stator tooth 22. The setting of the tooth tip 2202 can significantly increase the contact area between the stator tooth 22 and the permanent magnet of the rotor 3, thereby improving the utilization rate of the permanent magnet of the rotor 3 and being beneficial to improving the back electromotive force of the motor 1 and reducing the cogging torque.

[0194] Among them, the shapes and sizes of the first body part 2216 and the second body part 2217 are the same, as Figures 1 to 9 shown.

[0195] Since the shapes and sizes of the first body part 2216 and the second body part 2217 are the same, the first body part 2216 and the second body part 2217 can be prepared by using the same stator punching sheet, which is beneficial to reducing the types of stator punching sheets, reducing the processing difficulty, and improving the installation speed.

[0196] Furthermore, the first tip part 2214 extends in a direction away from the second body part 2217, the second tip part 2215 extends in a direction away from the first body part 2216, and the first tip part 2214 and the second tip part 2215 are symmetric with each other, as Figures 1 to 9 shown.

[0197] The first tip part 2214 and the second tip part 2215 extend in directions away from each other. In other words, the first tip part 2214 and the second tip part 2215 extend outwards, which can reduce the distance between the first body part 2216 and the second body part 2217 and increase the space between adjacent stator teeth 22, facilitating the winding of the winding 21. The first tip part 2214 and the second tip part 2215 are symmetric with each other, making the structure of the stator tooth 22 relatively regular.

[0198] Optionally, the number of tooth tips 2202 is one, and one tooth tip 2202 is provided on one end face of the tooth body 2201, as Figure 1 shown.

[0199] Optionally, the number of tooth tips 2202 is two, and two tooth tips 2202 are provided on two end faces of the tooth body 2201 that are opposite to each other, as Figure 3 shown.

[0200] The number of tooth tips 2202 on each tooth body 2201 can be adjusted according to actual requirements. Specifically, one tooth tip 2202 can be provided on the tooth body 2201 of a stator 2, and two tooth tips 2202 can also be provided on the tooth body 2201 of a stator 2. The two tooth tips 2202 can be respectively provided on two end faces of the tooth body 2201.

[0201] It can be understood that since the stator teeth 22 include a first tooth portion 221 and a second tooth portion 222 that are circumferentially spaced along the stator core 20, the above solution is also equivalent to:

[0202] The number of the first tip portions 2214 is one, and one first tip portion 2214 is provided on one end face of the first body portion 2216 (as shown in Figure 16 and Figure 18 ), the number of the second tip portions 2215 is one, and one second tip portion 2215 is provided on one end face of the second body portion 2217 and is correspondingly arranged with the first tip portion 2214, as shown in Figure 1 , Figure 5 and Figure 7 ; or

[0203] The number of the first tip portions 2214 is two, and the two first tip portions 2214 are provided on two opposite end faces of the first body portion 2216 (as shown in Figure 17 and Figure 19 ), the number of the second tip portions 2215 is two, and the two second tip portions 2215 are provided on two opposite end faces of the second body portion 2217, as shown in Figure 3 and Figure 9 .

[0204] Furthermore, the first tip portion 2214 includes a plurality of sub-tip portions. The plurality of sub-tip portions are arranged radially along the stator core 20, and at least one end face at both circumferential ends of adjacent sub-tip portions is staggered from each other, so that at least one end of the first tip portion 2214 along the circumferential direction of the stator core 20 forms a stepped structure, as shown in Figure 18 and Figure 19 .

[0205] The first tip 2214 is divided into multiple sub - tips. Since the multiple sub - tips are arranged radially along the stator core 20, and at least one end face of adjacent sub - tips of the same first tooth part 221 is offset from each other at both ends in the circumferential direction of the stator core 20, a stepped structure is formed at least at one end face of the first tip 2214 in the circumferential direction of the stator core 20. Compared with the flat end face in the prior art, the stepped end face is convenient for reasonably utilizing the space between adjacent stator teeth 22 or between tooth parts adjacent to the same stator tooth 22 according to the specific structure of the motor 1, which is beneficial to increasing the contact area between the stator teeth 22 and the permanent magnets of the rotor 3, thereby improving the utilization rate of the permanent magnets of the rotor 3 and further increasing the torque density of the motor 1. At the same time, it is also convenient to use the stepped end face to reasonably adjust the width of each part in the radial direction of the slot opening between adjacent tooth tips 2202 on the stator core 20 to reduce the introduction of harmonics, thereby effectively improving the back electromotive force of the motor 1, reducing the cogging torque of the motor 1, and being beneficial to the application expansion of the axial motor 1.

[0206] In addition, since the stator tooth 22 has a certain thickness, multiple stator laminations can be stacked and formed along its thickness direction. In this application, dividing the first tip 2214 into multiple sub - tips makes the end face of the first tooth part 221 form a stepped structure. Compared with the scheme of using trapezoidal tooth tips 2202 (in this scheme, the sizes of adjacent stator laminations are all different but the difference is small, so that the overall tooth tip formed by stacking is a trapezoidal structure, and the two end faces of the tooth tip in the circumferential direction of the stator core are basically inclined surfaces, rather than the stepped surfaces of this application), the types of stator laminations used for the lamination and forming of the first tooth part 221 can be significantly reduced, thereby improving the processability of the first tooth part 221 and reducing the processing difficulty of the first tooth part 221. For example: when the number of sub - tips is three, only three sizes of stator laminations need to be selected, laminated and formed into three pieces respectively, and then laminated together to form the complete first tooth part 221. Multiple sub - tips can be laminated with corresponding - shaped stator laminations to form a stepped shape. Compared with the trapezoidal stator tooth tips 2202, the types of laminations can be reduced, which is convenient for processing and forming.

[0207] For example: when the number of sub - tips of the first tooth part 221 is three (denoted as the first sub - tip 2211, the second sub - tip 2212, and the third sub - tip 2213 respectively), only three sizes of stator laminations need to be selected, laminated and formed into three pieces respectively, and then laminated together to form the complete stator tooth 22. Multiple sub - tips can be laminated with corresponding - shaped stator laminations to form a stepped shape. Compared with the trapezoidal stator tooth tips 2202 (the sizes of all stator laminations are different, so the number of types of stator laminations is the same as the number of stator laminations), the types of laminations can be reduced, which is convenient for processing and forming.

[0208] Among them, the thickness D (such as D1, D2, D3, etc.) of each sub - tip can be flexibly adjusted according to the specific use scenario and processing and performance optimization requirements.

[0209] Optionally, only one end face of each sub-tip forms a stepped structure, and the other end face is a flat end face. Among them, the stepped end face can be a second tooth portion facing the same first tooth portion, such as Figure 5 and Figure 6 shown; the stepped end face can also face the second tooth portion of the adjacent stator tooth, such as Figure 9 shown.

[0210] Furthermore, the other flat end face of each sub-tip can be flush with the sub-body portion, such as Figure 9 shown, or can protrude from the sub-body portion, such as Figure 5 and Figure 6 shown.

[0211] Furthermore, the tooth body 2201 extends along the axial direction of the stator core 20. The first body portion 2216 includes a plurality of sub-body portions arranged radially along the stator core 20. The number of sub-body portions is equal to and corresponds one-to-one with the number of sub-tips. The sub-body portion and the corresponding sub-tip are integrally formed.

[0212] The first body portion 2216 includes a plurality of sub-body portions. The plurality of sub-body portions are arranged radially along the stator core 20, corresponding one-to-one with the plurality of sub-tips of the first tip 2214. And each sub-body portion and the corresponding sub-tip are integrally formed. Then the entire first tooth portion 221 can be divided into multiple pieces along the radial direction of the stator core 20, and then laminated to form the first tooth portion 221. This simplifies the structure of the product, makes the integrity of the product better, and omits the connection step between the first tip 2214 and the first body portion 2216, further improving the assembly efficiency of the product. For example: each piece can be formed by laminating a plurality of stator punchings with the same shape along the radial direction of the stator core 20, and then multiple pieces are laminated along the radial direction of the stator core 20 to form the stator tooth 22.

[0213] Furthermore, the shapes of the plurality of sub-body portions are the same.

[0214] The shapes of the plurality of sub-body portions are the same, that is: the widths (along the circumferential direction of the stator core 20, parallel to the length direction of the sub-tip) and the contour shapes of the plurality of sub-body portions are the same. This makes the shape of the tooth body 2201 of the stator tooth 22 more regular, which is not only convenient for processing and forming, but also beneficial to simplifying the structure of the stator yoke 23 and facilitating the assembly of the stator tooth 22 and the stator yoke 23.

[0215] In a specific example, the number of sub-body parts of the first tooth part 221 is three, which are respectively denoted as the first sub-body part, the second sub-body part, and the third sub-body part. The first sub-body part is integrally formed with the first sub-tip part 2211 and is formed by stacking a plurality of stator laminations with the same shape along the radial direction of the stator core 20 to form a first part; the second sub-body part is integrally formed with the second sub-tip part 2212 and is formed by stacking a plurality of stator laminations with the same shape along the radial direction of the stator core 20 to form a second part; the third sub-body part is integrally formed with the third sub-tip part 2213 and is formed by stacking a plurality of stator laminations with the same shape along the radial direction of the stator core 20 to form a third part. Then, the first part, the second part, and the third part are stacked along the radial direction of the stator core 20 to form the stator tooth 22.

[0216] Among them, the span L1 of the first sub-tip part 2211, the span L2 of the second sub-tip part 2212, and the span L3 of the third sub-tip part 2213 satisfy: L1 < L < L3.

[0217] The thickness D1 of the first sub-tip part 2211, the thickness D2 of the second sub-tip part 2212, and the thickness D3 of the third sub-tip part 2213 can be adjusted according to the specific usage scenario.

[0218] Furthermore, the second tip part 2215 includes a plurality of sub-tip parts. The plurality of sub-tip parts are arranged along the radial direction of the stator core 20, and at least one end face at both ends in the circumferential direction of the stator core 20 of adjacent sub-tip parts is staggered from each other, so that at least one end of the second tip part 2215 in the circumferential direction of the stator core 20 forms a stepped structure, as Figure 18 and Figure 19 shown.

[0219] The second tip part 2215 is the same as the first tip part 2214 and will not be elaborated here.

[0220] Furthermore, the spans L in the circumferential direction of the stator core 20 of adjacent sub-tip parts of the same first tooth part 221 or second tooth part 222 are different, as Figure 18 and Figure 19 shown, so that at least one end face at both ends in the circumferential direction of the stator core 20 of adjacent sub-tip parts is staggered from each other.

[0221] The spans L of the plurality of sub-tip parts are inconsistent, which is convenient for flexible adjustment according to the specific usage scenario and the requirements of processing and performance optimization.

[0222] Among them, along the radial direction of the stator core 20 from the inside to the outside, the span L of the sub-tip part in the circumferential direction of the stator core 20 gradually increases, as Figure 5 , Figure 6 and Figure 9 shown.

[0223] Radially from the inside to the outside of the stator core 20, the span L (such as L1, L2, L3, etc.) of the sub-tips along the circumferential direction of the stator core 20 gradually increases, which can effectively improve the situation in the prior art that the notch distance between adjacent stator tooth tips 2202 of the axial-flux motor 1 increases with the increase of the outer diameter of the stator yoke 23. Therefore, it is beneficial to improve the utilization rate of the permanent magnets of the rotor 3 and also beneficial to reduce the introduction of harmonics, thereby avoiding the reduction of the sinusoidality of the back electromotive force and the increase of the cogging torque ripple, which is beneficial to the application expansion of the axial motor 1.

[0224] Optionally, the minimum distance S between the corresponding sub-tips of any adjacent stator teeth 22 is equal, such as Figure 5 , Figure 6 and Figure 9 shown.

[0225] The minimum distance S between the corresponding sub-tips of any adjacent stator teeth 22 is equal, making the structure of the product more regular, facilitating processing and forming, and also being more aesthetically pleasing.

[0226] For example: for the case where both the first tooth part 221 and the second tooth part 222 include three sub-tips, the minimum distance S1 between adjacent first sub-tips 2211, the minimum distance S2 between adjacent second sub-tips 2212, and the minimum distance S3 between adjacent third sub-tips 2213 satisfy: S1 = S2 = S3.

[0227] Of course, the minimum distance S between the corresponding sub-tips of adjacent tooth parts may also be unequal. For example, it gradually increases in the radially outward direction and can be flexibly adjusted according to specific usage scenarios and processing performance optimization requirements.

[0228] Embodiment Five

[0229] The difference from any of the above embodiments is that: on the basis of any of the above embodiments, further, a positioning portion is provided on the tooth body 2201 for adapting to a mating portion provided on the stator yoke 23.

[0230] By providing a positioning portion on the tooth body 2201 and correspondingly providing a mating portion on the stator yoke 23, the cooperation of the positioning portion and the mating portion can play a good positioning and limiting role during assembly, which is beneficial to the rapid assembly of the tooth body 2201 and the stator yoke 23.

[0231] Optionally, the positioning portion includes a positioning protrusion 220, as Figures 16 to 19 shown, and the positioning protrusion 220 is used to adapt to a mating portion configured as a positioning groove.

[0232] Optionally, the positioning portion includes a positioning groove, and the positioning groove is used to adapt to a mating portion configured as a positioning protrusion 220.

[0233] The positioning protrusion 220 is inserted into the positioning groove, which can effectively prevent the relative movement between the stator teeth 22 and the stator yoke 23, realize the rapid assembly of the tooth body 2201 and the stator yoke 23, and improve the connection stability between the stator teeth 22 and the stator yoke 23; moreover, the structures of the positioning protrusion 220 and the positioning groove are relatively simple and convenient for processing and forming.

[0234] Optionally, the positioning protrusion 220 is a positioning rib, and the positioning rib extends along the radial direction of the stator core 20, as Figures 16 to 19 shown.

[0235] Specifically, both the first tooth portion 221 and the second tooth portion 222 are provided with positioning portions.

[0236] Both the first tooth portion 221 and the second tooth portion 222 are provided with positioning portions, which ensures that both the first tooth portion 221 and the second tooth portion 222 can be quickly and well assembled with the stator yoke 23.

[0237] The stator 2 provided by the embodiment of the second aspect of the present invention includes: the stator core 20 and the winding 21 as described in any one of the embodiments of the first aspect. The winding 21 is wound around the tooth body 2201 of the stator core 20.

[0238] Since the stator 2 provided by the embodiment of the second aspect of the present invention includes the stator core 20 as described in any one of the embodiments of the first aspect, it has all the beneficial effects of any of the above embodiments and will not be elaborated here.

[0239] Furthermore, the winding 21 is wound around the tooth body 2201 of the stator teeth 22 and is located on the end face of the stator yoke 23. Among them, there can be multiple windings 21, and the wire bundle shapes between the multiple windings 21 can be the same or different. The winding 21 can be one set, two sets or multiple sets.

[0240] In some embodiments of the present invention, specifically, the stator 2 includes: a stator core 20 and at least one winding 21. The stator core 20 includes a stator yoke 23 and at least one stator tooth 22. The stator yoke 23 is laminated axially.

[0241] The stator yoke 23 is provided with stator yoke slots 231. The stator yoke slots 231 include a first sub-slot 2311 and a second sub-slot 2312. The first sub-slot 2311 and the second sub-slot 2312 are parallel to each other or in a V shape. The stator teeth 22 include a stator tooth body 2201 and a stator tooth tip 2202. Each stator tooth 22 is stacked radially along the stator yoke 23. The stator teeth 22 include a first tooth portion 221 and a second tooth portion 222. Among them, each stator tooth 22 is arranged along the axial direction of the stator yoke 23. The stator tooth 22 is detachably connected to the stator yoke 23. And the shapes of the first tooth portion 221 and the second tooth portion 222 are respectively adapted to the first sub-slot 2311 and the second sub-slot 2312. The stator teeth 22 pass through the stator yoke slots 231 to form a stator core 20.

[0242] The winding 21 is wound around the stator tooth body 2201 formed by the first tooth portion 221 and the second tooth portion 222 and is located on the end face 232 of the stator yoke. The winding 21 can be one set, two sets or multiple sets.

[0243] The stator 2 provided in this embodiment includes a stator core 20. The stator core 20 includes a stator yoke 23, at least one stator tooth 22 and at least one winding 21. That is, the number of stator teeth 22 and windings 21 can be one or more. By arranging each stator tooth 22 along the axial direction of the stator yoke 23 and detachably connecting each stator tooth 22 to the stator yoke 23, in this way, when the winding 21 is wound, it is not restricted by the shape of the stator core 20. Each stator tooth 22 can be connected to the stator yoke 23 after the winding 21 is wound. The winding method is flexible, which improves the winding efficiency of the winding 21.

[0244] In addition, by reasonably arranging the size of the stator teeth 22 or the spacing between the stator teeth 22 to adjust the size of the winding slot, the number of sets of the winding 21 can be flexibly set, so that the power level of the stator core 20 can be reasonably adjusted, solving the problem in the prior art that the power level of the stator core 20 is limited due to the single size of the winding slot.

[0245] And when the stator teeth 22 are assembled with the stator yoke 23, directly passing each stator tooth 22 through the stator yoke slot 231 adapted to its shape can realize the rapid assembly of the stator teeth 22 and the stator yoke 23.

[0246] Or, the stator teeth 22 can also be snap-connected to the stator bosses 233. Even, a part of the multiple stator teeth 22 can be arranged through the stator yoke slots 231, and the remaining stator teeth 22 are snap-connected to the stator bosses 233. Any of the above methods can realize the rapid assembly of the stator teeth 22 and the stator yoke 23, effectively improving the assembly efficiency of the stator teeth 22 and the stator yoke 23.

[0247] Among them, the materials of the stator teeth 22 and the stator yoke 23 can be silicon steel sheets. Any other solutions that can achieve the purpose of the present invention should be within the protection scope of the present invention.

[0248] Among them, it should be noted that there can be multiple windings 21, and the shapes of the wire packages between the multiple windings 21 can be the same or different.

[0249] In the above embodiment, the number of stator yoke slots 231 is multiple, and the multiple stator yoke slots 231 are evenly arranged on the stator yoke 23 around the axis of the stator core 20.

[0250] The number of stator yoke slots 231 is multiple. By evenly arranging the multiple stator yoke slots 231 on the stator yoke 23 around the axis of the stator core 20, the structure of the product becomes more regular, and the number of stator yoke slots 231 is increased. Correspondingly, the number of stator teeth 22 is also multiple, and the multiple stator teeth 22 are inserted into the corresponding multiple stator yoke slots 231, thereby increasing the number of windings 21, and further contributing to improving the power rating of the stator core 20.

[0251] In the above embodiment, optionally, the first sub-slot 2311 and the second sub-slot 2312 of the stator yoke slot 231 are parallel to each other, so that the tooth tips 2202 of the adapted first tooth portion 221 and the second tooth portion 222 are parallel, and the first sub-slot 2311 and the second sub-slot 2312 of adjacent stator yoke slots 231 are in a V shape with each other.

[0252] The tooth tips 2202 of the adapted first tooth portion 221 and the second tooth portion 222 are parallel, which is convenient for adjusting the parallel tooth slot pitch between the first tooth portion 221 and the second tooth portion 222, thereby effectively improving the sine degree of the back electromotive force and reducing the cogging torque.

[0253] In the above embodiment, optionally, the first sub-slot 2311 and the second sub-slot 2312 of the stator yoke slot 231 are in a V shape with each other, so that the tooth tips 2202 of the adapted first tooth portion 221 and the second tooth portion 222 are in a V shape with each other, and the first sub-slot 2311 and the second sub-slot 2312 of adjacent stator yoke slots 231 are parallel to each other.

[0254] The first sub-slot 2311 and the second sub-slot 2312 of adjacent stator yoke slots 231 are parallel to each other, so that a relatively regular rectangular space is formed between adjacent stator yoke slots 231, which is convenient for the regular arrangement of the stator 2 wire package and improves the slot fill factor of the axial motor 1.

[0255] Using the winding method that spans two teeth is beneficial to eliminating low-order harmonics, thereby improving the sine degree of the back electromotive force of the motor 1 and reducing the cogging torque, and further reducing the vibration and noise of the motor 1.

[0256] In the above embodiments, the notch widths of the first sub-slot 2311 and the second sub-slot 2312 of the stator yoke slot 231 are the same, so that the widths of the tooth bodies 2201 of the adapted first tooth portion 221 and the second tooth portion 222 are the same. Specifically, the widths and profile shapes of the tooth bodies 2201 of various stator tooth laminations are the same, which is convenient for reducing the types of punching sheets of the stator teeth 22, thereby reducing the process difficulty of the motor 1 and improving the installation speed of the motor 1.

[0257] In the above embodiments, optionally, the stator yoke slot 231 axially penetrates at least one end face of the stator yoke portion 23.

[0258] The stator yoke slot 231 may axially penetrate one end face of the stator yoke portion 23, or may axially penetrate both end faces of the stator yoke portion 23. That is, the stator teeth 22 may be inserted into the stator yoke slot 231 penetrating one end face of the stator yoke portion 23, or may be inserted into the stator yoke slot 231 penetrating both end faces of the stator yoke portion 23, so that the connection method between the stator teeth 22 and the stator yoke portion 23 is diverse, and the assembly method of the winding 21 is relatively flexible to meet different needs of users.

[0259] In the above embodiments, optionally, there is a spacing between the stator yoke slot 231 and the outer peripheral surface of the stator yoke portion 23 in the radial direction, and there is a spacing between the stator yoke slot 231 and the inner peripheral surface of the stator yoke portion 23 in the radial direction; or the stator yoke slot 231 communicates with the outer peripheral surface and / or the inner peripheral surface of the stator yoke portion 23.

[0260] There is a spacing between the stator yoke slot 231 and the outer peripheral surface of the stator yoke portion 23 in the radial direction, that is, the stator yoke slot 231 penetrates the stator yoke portion 23 and does not communicate with the outer peripheral surface of the stator yoke portion 23. Then, the stator teeth 22 are inserted into the stator yoke slot 231 along the axis direction of the stator yoke portion 23 to be connected to the stator yoke portion 23, avoiding the stator teeth 22 from detaching from the stator yoke portion 23 along the outer peripheral surface or the inner peripheral surface of the stator yoke portion 23 in the stator yoke slot 231, and improving the connection reliability between the stator teeth 22 and the stator yoke portion 23.

[0261] The stator yoke slot 231 communicates with the outer peripheral surface or the inner peripheral surface of the stator yoke portion 23. Then, the stator teeth 22 can be inserted into the stator yoke slot 231 from the outer peripheral surface or the inner peripheral surface of the stator yoke portion 23, and the connection method is flexible, which is convenient for the assembly between the stator teeth 22 and the stator yoke portion 23.

[0262] The stator yoke slot 231 communicates with both the outer peripheral surface and the inner peripheral surface of the stator yoke portion 23 at the same time. Then, the stator teeth 22 can be inserted into the stator yoke slot 231 from the outer peripheral surface along the axial or radial direction to form a complete stator core 20.

[0263] In the above embodiments, the outer peripheral surface of the stator yoke portion 23 extends radially outward to form a stator boss 233; and / or, the inner peripheral surface of the stator yoke portion 23 extends radially inward to form a stator boss 233.

[0264] The outer peripheral surface of the stator yoke 23 extends radially outward to form a stator boss 233, that is, the stator boss 233 is located on the outer peripheral surface of the stator yoke 23; the inner peripheral surface of the stator yoke 23 extends radially inward to form a stator boss 233, that is, the stator boss 233 is located on the inner peripheral surface of the stator yoke 23.

[0265] In this embodiment, the number of stator bosses 233 is multiple, and the multiple stator bosses 233 are evenly arranged on the stator yoke 23 around the axis of the stator core 20.

[0266] Furthermore, through holes 234 can be provided on the stator boss 233, which can be used for welding the edge of the stator yoke 23 or facilitating the fixed connection between the stator yoke 23 and the machine housing, etc., or for the wire passing of the winding 21.

[0267] In the above embodiment, through holes 234 are evenly distributed at the symmetry lines of adjacent stator yoke slots 231 of the stator yoke 23, which can be used for welding the edge of the stator yoke 23 or facilitating the fixed connection between the stator yoke 23 and the machine housing, etc., or for the wire passing of the winding 21.

[0268] In the above embodiment, the cross-sectional area of the stator yoke 23 is one of a circle, an ellipse, and a regular polygon.

[0269] The cross-sectional area of the stator yoke 23 is one of a circle, an ellipse, and a regular polygon, and the structures are all relatively regular, which is convenient for processing and forming, suitable for mass production, and helps to improve the aesthetic degree of the product.

[0270] In the above embodiment, the stator yoke 23 can be integrally formed as a whole, or can be formed by splicing multiple yoke parts, which is beneficial to improving the material utilization rate of the stator yoke 23.

[0271] In the above embodiment, the stator tooth tip 2202 is provided at the end of the stator tooth body 2201. Optionally, the stator tooth tip 2202 and the stator tooth body 2201 are integrally formed, which simplifies the structure of the product, makes the integrity of the product better, and omits the connection step between the stator tooth tip 2202 and the stator tooth body 2201, further improving the assembly efficiency of the product.

[0272] Optionally, the number of stator tooth tips 2202 is one, and the stator tooth tip 2202 is provided at one end of the stator tooth body 2201; or the number of stator tooth tips 2202 is two, and one stator tooth tip 2202 is respectively provided at both ends of the stator tooth body 2201.

[0273] In this embodiment, the stator tooth tip 2202 can be adjusted according to actual needs for the number provided on each stator tooth body 2201. Specifically, one stator tooth body 2201 can be provided with one stator tooth tip 2202, and one stator tooth body 2201 can also be provided with two stator tooth tips 2202.

[0274] It should be noted that the two stator tooth tips 2202 can be respectively arranged on the end faces of the stator tooth bodies 2201.

[0275] In the above embodiment, each stator tooth 22 is radially stacked along the stator yoke 23 by a variety of stator tooth laminations, and the spans of the stator tooth tips 2202 of the various stator tooth laminations are inconsistent.

[0276] In this embodiment, the stator tooth 22 specifically includes a variety of stator tooth laminations radially stacked along the stator yoke 23, and the thicknesses D (D1, D2, D3...) of the various stator tooth laminations can be flexibly adjusted according to the specific usage scenario and the requirements for processing and performance optimization.

[0277] In this embodiment, the stator tooth 22 specifically includes a stator tooth body 2201 and a stator tooth tip 2202. The spans of the stator tooth tips 2202 of the various stator tooth laminations are inconsistent and can be flexibly adjusted according to the specific usage scenario and the requirements for processing and performance optimization. Further, the spans L (L1, L2, L3...) of the stator tooth tips 2202 of the various stator tooth laminations are set such that the minimum spacing S (S1, S2, S3...) between adjacent teeth of each stator tooth lamination is the same.

[0278] In the above embodiment, the stator 2 further includes: positioning grooves and / or positioning ribs with matching shapes. Among them, the positioning grooves and / or positioning ribs are arranged on the outer sides of the stator teeth 22, and / or the positioning grooves and / or positioning ribs are arranged on the stator yoke grooves 231 to limit the position of the stator teeth 22 in the stator yoke 23.

[0279] By arranging positioning ribs on the stator teeth 22 and positioning grooves on the stator yoke grooves 231, when the stator teeth 22 are assembled with the stator yoke 23, the stator teeth 22 are inserted into the grooves of the stator 2, and the positioning ribs or positioning grooves play a limiting role, thereby preventing the stator teeth 22 from moving relative to the stator yoke grooves 231, and further improving the stability of the connection between the stator teeth 22 and the positioning yoke grooves.

[0280] Similarly, positioning grooves can also be arranged on the stator teeth 22, positioning ribs can be arranged on the stator yoke grooves 231 or the stator bosses 233, or only positioning grooves or positioning ribs can be arranged on the stator teeth 22, or only positioning grooves or positioning ribs can be arranged on the stator yoke grooves 231. When the stator teeth 22 are assembled with the stator yoke 23, the stator teeth 22 are inserted into the grooves of the stator 2, and the positioning ribs or positioning grooves play a limiting role, thereby preventing the stator teeth 22 from moving relative to the stator yoke 23, and further improving the stability of the connection between the stator teeth 22 and the positioning yoke.

[0281] An embodiment of the third aspect of the present invention provides a motor 1, including: at least one stator 2 as in the embodiment of the second aspect and at least one rotor 3, and each rotor 3 is arranged corresponding to the stator 2.

[0282] Since the motor 1 provided by the embodiment of the third aspect of the present invention includes the stator 2 provided by the embodiment of the second aspect, it has all the beneficial effects of any of the above embodiments, which will not be elaborated here.

[0283] It should be noted that the categories of the motor 1 include but are not limited to single-stator single-rotor motors (such as Figure 20 and Figure 21 shown), single-stator double-rotor motors (such as Figure 22 and Figure 23 shown), single-rotor double-stator 2 motors, double-stator double-rotor motors. The number of stators 2 and the number of rotors 3 can both be one or more.

[0284] Optionally, the number of stators 2 is less than the number of rotors 3, and any stator 2 is arranged between two adjacent rotors 3.

[0285] Optionally, the number of stators 2 is greater than the number of rotors 3, and any rotor 3 is arranged between two adjacent stators 2.

[0286] When the number of stators 2 is less than the number of rotors 3, any two adjacent rotors 3 share one stator 2, and the structure is relatively regular, which helps to simplify the structure of the product and is convenient for the assembly of the rotor 3 and the stator 2.

[0287] Or, when the number of stators 2 is greater than the number of rotors 3, any two adjacent stators 2 share one rotor 3, and the structure is relatively regular, which helps to simplify the structure of the product and is convenient for the assembly of the rotor 3 and the stator 2.

[0288] It can be understood that the number of stators 2 is denoted as the first number, and the number of rotors 3 is denoted as the second number. When the number of rotors 3 is greater than the number of stators 2, and when the second number is N + 1 and the first number is N, the N + 1 rotors 3 can be arranged at intervals first, and then the N stators 2 are respectively inserted between two adjacent rotors 3 to form the motor 1.

[0289] Or, when the number of stators 2 is greater than the number of rotors 3, and when the second number is N and the first number is N + 1, the N + 1 stators 2 can be arranged at intervals first, and then the N rotors 3 are respectively inserted between two adjacent stators 2 to form the motor 1.

[0290] Optionally, the number of stators 2 is at least two, and the number of stator teeth 22 of at least two stators 2 is the same, or the number of phases of at least two stators 2 is the same.

[0291] Optionally, the number of stators 2 is at least two, the number of stator teeth 22 of at least two stators 2 is different, or the number of phases of at least two stators 2 is different.

[0292] The number of stators 2 is at least two, and the number of stator teeth 22 of at least two stators 2 is the same, which is convenient for the assembly of the stator teeth 22 and the stator yoke 23, or the number of phases of at least two stators 2 is the same, that is, the number of windings 21 on each stator 2 is the same, so that the power rating on each stator 2 is the same.

[0293] The number of stators 2 is at least two, the number of stator teeth 22 of at least two stators 2 is different, or the number of phases of at least two stators 2 is different, that is, the number of windings 21 on each stator 2 is different. In this way, the user can reasonably wind the windings 21 on each stator 2 to meet the actual power requirements.

[0294] In the above embodiments, optionally, the number of rotors 3 is multiple, and the multiple rotors 3 rotate independently. The rotating shafts of at least two rotors 3 are coaxial, parallel or perpendicular.

[0295] If the number of rotors 3 is set to be multiple, the rotating shafts of at least two rotors 3 can be arranged coaxially, parallelly or perpendicularly. The setting methods are diverse and the installation methods are relatively flexible.

[0296] Among them, one or more rotors 3 can be permanent magnet rotors, squirrel-cage rotors or salient-pole rotors. The number of pole pairs of at least two rotors 3 is different, or the number of pole pairs of at least two rotors 3 is the same.

[0297] The number of rotors 3 is multiple. The number of pole pairs of at least two rotors 3 can be set to be the same or different to meet the requirements of different working conditions.

[0298] Optionally, the rotor 3 is a permanent magnet rotor. The permanent magnet rotor includes a rotor yoke and permanent magnet steel. The permanent magnet steel is surface-mounted on the rotor yoke and is located between the rotor yoke and the tooth tip 2202 of the stator 2. This solution can meet the specific requirements of the product.

[0299] For example: the number of rotors 3 is two. As Figure 22 and Figure 23 shown, the two rotors 3 are respectively denoted as the first rotor and the second rotor. The rotor yoke and the permanent magnet steel of the first rotor are respectively denoted as the first rotor yoke 31 and the first permanent magnet steel 32, and the rotor yoke and the permanent magnet steel of the second rotor are respectively denoted as the second rotor yoke 33 and the second permanent magnet steel 34.

[0300] Or, as Figure 20 and Figure 21 shown, the number of rotors 3 is one, and the rotor yoke and the permanent magnet steel of this rotor 3 can also be marked as the first rotor yoke and the first permanent magnet steel 32.

[0301] Optionally, the rotor 3 is a permanent magnet rotor, which only includes a plurality of permanent magnet steel pieces. The permanent magnet steel pieces are magnetized in the Halbach manner, and the plurality of permanent magnet steel pieces are arranged in a ring shape and form an integral structure by injection molding. This solution saves the material usage of the rotor yoke part.

[0302] An embodiment of the fourth aspect of the present invention provides a fan, including: a body and the motor 1 as described in any one of the embodiments of the third aspect, which is installed on the body.

[0303] The fan provided by the embodiment of the fourth aspect of the present invention includes the motor 1 as described in any one of the embodiments of the third aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be elaborated here.

[0304] Specifically, the body includes a housing and an impeller. The motor is installed in the housing of the fan, and the impeller is fixedly connected to the output shaft of the motor.

[0305] Certainly, the motor 1 provided in this application can also be used in vehicles, compressors or other devices.

[0306] To sum up, this application has the following beneficial effects: By detachably connecting each stator tooth to the stator yoke part, the winding is not restricted by the shape of the stator core during winding, the winding method is flexible, and the winding efficiency is improved. In addition, by reasonably arranging the size of the stator teeth or the distance between the stator teeth to adjust the size of the winding slot, the number of winding sets can be flexibly set, so that the power level of the stator core can be reasonably adjusted. The first stator yoke slot and the second stator yoke slot of adjacent stator yoke slots are parallel to each other, so a relatively regular rectangular space is formed between adjacent stator yoke slots, which is convenient for the regular arrangement of the stator wire package, improves the slot fill factor of the axial motor, and can effectively improve the back electromotive force of the motor and reduce the cogging torque of the motor through a certain optimization design method.

[0307] In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", and "fixation" should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0308] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0309] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A stator core, characterized in that, Comprising: A stator yoke, the stator yoke is provided with a connection structure for connecting stator teeth, and the connection structure includes a first connection part and a second connection part which are arranged at intervals along the circumferential direction of the stator core; Stator teeth, arranged on the stator yoke, including a first tooth part and a second tooth part which are arranged at intervals along the circumferential direction of the stator core, the first tooth part is connected to the stator yoke through the first connection part, the second tooth part is connected to the stator yoke through the second connection part, and the first tooth part and the second tooth part jointly form the tooth body of the stator tooth, and the tooth body extends along the axial direction of the stator yoke and is wound by the same winding; The first tooth part includes a first body part and a first tip part connected to the end face of the first body part, and the first body part is connected to the stator yoke through the first connection part; The second tooth part includes a second body part and a second tip part connected to the end face of the second body part, and the second body part is connected to the stator yoke through the second connection part; The first body part and the second body part jointly form the tooth body of the stator tooth, and the first tip part and the second tip part jointly form the tooth tip of the stator tooth; The number of the tooth tips is one, and one tooth tip is arranged on one end face of the tooth body, and both the first tooth part and the second tooth part are L-shaped; or The number of the tooth tips is two, and two tooth tips are arranged on two opposite end faces of the tooth body, and both the first tooth part and the second tooth part are C-shaped.

2. The stator core according to claim 1, wherein The first connection part and the second connection part are parallel to each other, so that the first tooth part and the second tooth part are parallel to each other; or The first connection part and the second connection part are arranged in a V shape, so that the first tooth part and the second tooth part are arranged in a V shape.

3. The stator core according to claim 1, wherein The number of the stator teeth is multiple, and the multiple stator teeth are distributed at intervals along the circumferential direction of the stator core, and the number of the connection structures is equal to and corresponds to the number of the stator teeth one by one.

4. The stator core according to claim 3, wherein The first connection part and the second connection part of the same connection structure are parallel to each other, and the first connection part of any connection structure and the second connection part of the adjacent connection structure are arranged in a V shape; or The first connection part and the second connection part of the same connection structure are arranged in a V shape, and the first connection part of any connection structure and the second connection part of the adjacent connection structure are parallel to each other.

5. The stator core according to claim 3, wherein The shapes of the multiple stator teeth are the same, and the multiple stator teeth are evenly distributed along the circumferential direction of the stator core, and the multiple connection structures are adapted to the multiple stator teeth.

6. The stator core according to any one of claims 1 to 5, wherein The connection structure includes a stator yoke groove, and the stator yoke groove includes a first sub-groove and a second sub-groove which are arranged at intervals along the circumferential direction of the stator core, and the first sub-groove and the second sub-groove respectively form the first connection part and the second connection part; A part of the first tooth portion is locally embedded in the first sub-groove, and a part of the second tooth portion is locally embedded in the second sub-groove.

7. The stator core according to claim 6, characterized in that the stator yoke groove penetrates at least one axial end face of the stator yoke portion; and / or the stator yoke groove has a spacing from the inner peripheral surface and the outer peripheral surface of the stator yoke portion in the radial direction of the stator core; or, the stator yoke groove penetrates the inner peripheral surface and / or the outer peripheral surface of the stator yoke portion.

8. The stator core according to any one of claims 1 to 5, characterized in that the outer peripheral surface of the stator yoke portion extends radially outward to form a stator boss; and / or the inner peripheral surface of the stator yoke portion extends radially inward to form a stator boss.

9. The stator core according to claim 8, characterized in that the number of the stator bosses is multiple, and the multiple stator bosses are distributed at intervals along the circumferential direction of the stator core.

10. The stator core according to claim 9, characterized in that through holes are provided on the stator bosses.

11. The stator core according to any one of claims 1 to 5, characterized in that through holes are provided on the stator yoke portion, and the through holes are located between two adjacent stator teeth.

12. The stator core according to any one of claims 1 to 5, characterized in that the stator yoke portion is of an integral structure; or the stator yoke portion includes multiple split sub-yoke portions, and the multiple sub-yoke portions are spliced to form the stator yoke portion.

13. The stator core according to any one of claims 1 to 5, characterized in that the first tip extends away from the second body portion, the second tip extends away from the first body portion, and the first tip and the second tip are symmetric to each other.

14. The stator core according to any one of claims 1 to 5, characterized in that the first tip includes multiple sub-tips, the multiple sub-tips are arranged along the radial direction of the stator core, and at least one end face at both ends of the adjacent sub-tips along the circumferential direction of the stator core is staggered, so that at least one end of the first tip along the circumferential direction of the stator core forms a stepped structure; and / or the second tip includes multiple sub-tips, the multiple sub-tips are arranged along the radial direction of the stator core, and at least one end face at both ends of the adjacent sub-tips along the circumferential direction of the stator core is staggered, so that at least one end of the second tip along the circumferential direction of the stator core forms a stepped structure.

15. The stator core according to any one of claims 1 to 5, characterized in that positioning portions are provided on the tooth body for adapting to the mating portions provided on the stator yoke portion; wherein, the positioning portion includes a positioning protrusion for adapting to the mating portion configured as a positioning groove; and / or the positioning portion includes a positioning groove for adapting to the mating portion configured as a positioning protrusion.

16. A stator, characterized in that, including the stator core according to any one of claims 1 to 15.

17. A motor, characterized in that, including: at least one stator according to claim 16; and at least one rotor, and each rotor is correspondingly arranged with the stator.

18. The motor according to claim 17, wherein the number of the stators is less than the number of the rotors, and any one of the stators is disposed between two adjacent rotors; or the number of the stators is greater than the number of the rotors, and any one of the rotors is disposed between two adjacent stators.

19. The motor according to claim 17, wherein the number of the stators is at least two, and the number of stator teeth of at least two stators is the same, or the number of phases of at least two stators is the same; or the number of the stators is at least two, and the number of stator teeth of at least two stators is different, or the number of phases of at least two stators is different.

20. A fan, characterized in that, Comprising the motor according to any one of claims 17 to 19.

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