Stator core, stator component, stator assembly, levitation motor, suspension system, and vehicle

Abstract

A stator core, a stator component, a stator assembly, a levitation motor, a suspension system, and a vehicle. The stator core comprises a stator tooth portion, a stator yoke portion, and a tooth-yoke transition piece, the stator yoke portion being connected to the stator tooth portion, and at least one of the stator yoke portion and the stator tooth portion being a multi-layer structure; the tooth-yoke transition piece is connected to both the stator yoke portion and the stator tooth portion, allowing the stator yoke portion to connect to the stator tooth portion.

Description

Stator core, stator assembly, stator assembly, suspension motor, suspension system and vehicle

[0001] This application claims priority to Chinese patent application No. 202410407108.6, filed on April 3, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of motors, and in particular to a stator core, a stator component, a stator assembly, a suspended motor, a suspension system, and a vehicle. Background Art

[0003] With the advancement of technology, levitation motors have become an emerging type of electric motor. The stator core is a key component of levitation motors. Typically made of highly permeable materials, the stator core enhances the strength and stability of the electromagnetic field. The design of the stator core must consider not only electromagnetic performance but also structural strength, thermal management, and cost. Summary of the Invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the related art. To this end, one purpose of the present disclosure is to provide a stator core that can significantly reduce eddy current losses in the stator core, reduce the impact of the air gap on the magnetic field lines, and thereby improve the thrust and efficiency of the levitation motor.

[0005] According to some embodiments of the present disclosure, the stator core includes: a stator tooth portion, a stator yoke portion and a tooth yoke transition piece, the stator yoke portion and the stator tooth portion are connected, and at least one of the stator yoke portion and the stator tooth portion is a multi-layer structure; the tooth yoke transition piece is connected to both the stator yoke portion and the stator tooth portion to connect the stator yoke portion and the stator tooth portion.

[0006] According to the stator core of some embodiments of the present disclosure, by setting at least one of the stator yoke and the stator tooth to be a multi-layer structure, the eddy current loss generated by the stator yoke and the stator tooth can be greatly reduced. In addition, the provision of a tooth yoke transition piece can reduce the influence of the air gap on the magnetic field lines, thereby effectively improving the motor thrust and the overall operating efficiency of the motor.

[0007] According to the stator core of some embodiments of the present disclosure, the tooth yoke transition piece is located on the magnetic path from the stator tooth portion to the stator yoke portion.

[0008] According to some embodiments of the stator core of the present disclosure, at least one of the following conditions is met: the stator tooth portion is a multi-layer structure, and the projection of the tooth yoke transition piece and the stator tooth portion in the radial direction at least partially overlaps; or, the stator yoke portion is a multi-layer structure, and the projection of the tooth yoke transition piece and the stator yoke portion in the axial direction at least partially overlaps.

[0009] According to the stator core of some embodiments of the present disclosure, the tooth yoke transition piece is connected to the radial inner side of the stator tooth portion.

[0010] According to the stator core of some embodiments of the present disclosure, the axial extension dimension of the tooth yoke transition piece is greater than or equal to the axial extension dimension of the stator tooth portion.

[0011] According to the stator core of some embodiments of the present disclosure, a side surface of the tooth yoke transition piece away from the stator yoke portion is flush with a side surface of the stator tooth portion, and in the axial direction, a side surface of the tooth yoke transition piece close to the stator yoke portion is located between the stator tooth portion and the stator yoke portion.

[0012] According to the stator core of some embodiments of the present disclosure, the tooth yoke transition piece includes a magnetic conductive material piece.

[0013] According to the stator core of some embodiments of the present disclosure, the yoke transition piece is an integral piece.

[0014] According to the stator core of some embodiments of the present disclosure, the tooth yoke transition piece is a multi-layer structure, the stator teeth are a multi-layer structure, and the number of layers of the tooth yoke transition piece is less than the number of layers of the stator teeth.

[0015] According to the stator core of some embodiments of the present disclosure, the stator teeth include a plurality of first laminations stacked together.

[0016] According to the stator core of some embodiments of the present disclosure, the stator yoke is a winding.

[0017] According to the stator core of some embodiments of the present disclosure, the tooth yoke transition piece is connected to one axial side of the stator yoke part.

[0018] According to the stator core of some embodiments of the present disclosure, the tooth yoke transition piece and the stator tooth portion are connected via a first matching structure and a second matching structure.

[0019] According to the stator core of some embodiments of the present disclosure, one of the first mating structure and the second mating structure is a first positioning protrusion, and the other of the first mating structure and the second mating structure is a first positioning groove, and the first positioning protrusion and the first positioning groove are plugged into each other to limit the circumferential position of the stator teeth.

[0020] According to the stator core of some embodiments of the present disclosure, in the circumferential direction of the stator tooth portion, the opposite side walls of the first positioning groove extend obliquely toward each other in the direction toward the center of the stator tooth portion, and the first positioning protrusion and the first positioning groove cooperate.

[0021] According to the stator core of some embodiments of the present disclosure, the first positioning protrusion is provided on the outer peripheral wall of the yoke transition piece, and the first positioning groove is located in the stator tooth portion and is recessed outward from the inner wall of the stator tooth portion.

[0022] According to the stator core of some embodiments of the present disclosure, one of the first matching structure and the second matching structure is a guide protrusion, and the other of the first matching structure and the second matching structure is a guide groove, and the guide protrusion and the guide groove match.

[0023] According to the stator core of some embodiments of the present disclosure, the outer peripheral wall of the guide protrusion is formed as an arc-shaped surface, and the guide groove is formed as an arc-shaped groove.

[0024] According to the stator core of some embodiments of the present disclosure, the guide groove is provided on the outer peripheral wall of the yoke transition piece, and the guide protrusion is located on the stator tooth portion and protrudes inward from the inner wall of the stator tooth portion.

[0025] According to the stator core of some embodiments of the present disclosure, in the axial direction of the stator core, the end of the tooth yoke transition piece is provided with a first plug-in portion, and the end of the stator yoke is provided with a second plug-in portion, and the first plug-in portion and the second plug-in portion are plug-fitted.

[0026] According to the stator core of some embodiments of the present disclosure, the first plug-in portion includes a plurality of first plug-in protrusions protruding axially, and the second plug-in portion includes a plurality of first plug-in grooves, and the plurality of first plug-in protrusions and the plurality of first plug-in grooves are respectively plug-fitted into each other.

[0027] According to the stator core of some embodiments of the present disclosure, the yoke transition piece is provided with at least one slit.

[0028] According to the stator core of some embodiments of the present disclosure, the at least one slit includes a plurality of slits, and the plurality of slits are arranged at intervals in the circumferential direction of the tooth yoke transition piece.

[0029] According to some embodiments of the present disclosure, the stator core further includes a stator tooth crown, which is arranged on the radial outside of the stator tooth portion. In the axial direction of the stator core, at least one axial end of the stator tooth crown protrudes from the axial end face of the stator tooth portion.

[0030] According to the stator core of some embodiments of the present disclosure, the stator crown includes a plurality of second laminations stacked along the axial direction of the stator core.

[0031] According to the stator core of some embodiments of the present disclosure, in the circumferential direction of the stator core, the stator tooth crown includes a plurality of sub-crown portions arranged at intervals along the circumferential direction, and the wire groove of the stator tooth crown is defined by two adjacent sub-crown portions among the plurality of sub-crown portions.

[0032] According to the stator core of some embodiments of the present disclosure, the stator tooth crown is formed as an annular integral part, and the outer peripheral wall of the stator tooth crown is provided with a plurality of wire grooves.

[0033] According to the stator core of some embodiments of the present disclosure, a portion of the stator tooth crown is bent inward to define a bent portion provided with the wire slot, and a second positioning groove is provided on the peripheral wall of the stator tooth portion, and the bent portion is located in the second positioning groove.

[0034] According to the stator core of some embodiments of the present disclosure, the stator tooth crown includes a circumferential side wall and a plurality of axial end faces, and a transition chamfer is provided between the circumferential side wall and at least one of the plurality of axial end faces.

[0035] The present disclosure also proposes another stator core, including: a stator tooth portion, a stator yoke portion and a tooth yoke transition piece; a radial magnetic path is formed on the stator tooth portion; an axial magnetic path is formed on the stator yoke portion; a connecting magnetic path is formed on the tooth yoke transition piece, the magnetic path of the stator core includes the radial magnetic path, the axial magnetic path and the connecting magnetic path, and the connecting magnetic path is used to connect the radial magnetic path and the axial magnetic path.

[0036] According to the stator core of some other embodiments of the present disclosure, the tooth yoke transition piece is located on the magnetic path from the stator tooth portion to the stator yoke portion.

[0037] According to some other embodiments of the stator core of the present disclosure, at least one of the following conditions is met: the stator tooth portion is a multi-layer structure, and the projection of the tooth yoke transition piece and the stator tooth portion in the radial direction at least partially overlaps; or, the stator yoke portion is a multi-layer structure, and the projection of the tooth yoke transition piece and the stator yoke portion in the axial direction at least partially overlaps.

[0038] According to the stator core of some other embodiments of the present disclosure, the tooth yoke transition piece is connected to the radial inner side of the stator tooth portion.

[0039] According to the stator core of some other embodiments of the present disclosure, the axial extension dimension of the tooth yoke transition piece is greater than or equal to the axial extension dimension of the stator tooth portion.

[0040] According to the stator core of some other embodiments of the present disclosure, a side surface of the tooth yoke transition piece away from the stator yoke portion is flush with a side surface of the stator tooth portion, and in the axial direction, a side surface of the tooth yoke transition piece close to the stator yoke portion is located between the stator tooth portion and the stator yoke portion.

[0041] According to the stator core of some other embodiments of the present disclosure, the yoke transition piece includes a magnetic conductive material piece.

[0042] According to the stator core of some other embodiments of the present disclosure, the yoke transition piece is an integral piece.

[0043] According to the stator core of some other embodiments of the present disclosure, the tooth yoke transition piece is a multi-layer structure, the stator teeth are a multi-layer structure, and the number of layers of the tooth yoke transition piece is less than the number of layers of the stator teeth.

[0044] According to the stator core of some other embodiments of the present disclosure, the stator teeth include a plurality of first laminations stacked together.

[0045] According to the stator core of some other embodiments of the present disclosure, the stator yoke is a winding.

[0046] According to the stator core of some other embodiments of the present disclosure, the tooth yoke transition piece is connected to one axial side of the stator yoke part.

[0047] The present disclosure also provides a stator assembly.

[0048] According to some embodiments of the present disclosure, the stator assembly includes: a stator core and a stator winding, wherein the stator core is any one of the stator cores described above; the stator winding is placed on the stator teeth and is externally mounted on the stator yoke.

[0049] The present disclosure also provides a stator assembly.

[0050] According to some embodiments of the present disclosure, the stator assembly includes a plurality of stator assemblies, any one of the plurality of stator assemblies is the stator assembly described above, and the plurality of stator assemblies are stacked in the axial direction.

[0051] According to some embodiments of the present disclosure, the stator assembly further includes a connecting rod, and the stator cores of the multiple stator assemblies are arranged on the connecting rod.

[0052] According to the stator assembly of some embodiments of the present disclosure, the connecting rod passes through the stator core, and the yoke transition piece is provided with a positioning portion that limits the circumferential position of the connecting rod.

[0053] The present disclosure also proposes a levitation motor.

[0054] According to some embodiments of the present disclosure, a levitation motor includes: a stator assembly and a mover assembly, wherein the stator assembly is the stator assembly described in any one of the above embodiments; and the mover assembly is movably matched with the stator assembly.

[0055] The present disclosure also proposes a suspension system, comprising the suspension motor described in any one of the above embodiments, wherein one of the stator assembly and the mover assembly is suitable for connection to a vehicle body, and the other of the stator assembly and the mover assembly is suitable for connection to a wheel.

[0056] The present disclosure also provides a vehicle comprising the suspension system described in any one of the above embodiments.

[0057] The advantages of the vehicle, the suspension system, the suspension motor, the stator assembly and the stator component are the same as those of the above-mentioned stator core compared with the related art, which will not be repeated here.

[0058] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] At least one of the above or additional aspects and advantages of the present disclosure will become apparent and easily understood from the description of the embodiments with reference to the following drawings.

[0060] FIG1 is a structural diagram of a stator core according to some embodiments of the present disclosure;

[0061] FIG2 is a structural diagram of a stator core according to some embodiments of the present disclosure from another perspective;

[0062] FIG3 is a structural diagram of a gear yoke transition piece according to some embodiments of the present disclosure;

[0063] FIG4 is a structural diagram of a gear yoke transition piece according to some embodiments of the present disclosure from another perspective;

[0064] FIG5 is a structural diagram of one side end surface of a yoke transition piece according to other embodiments of the present disclosure;

[0065] FIG6 is a structural diagram of a gear yoke transition piece according to other embodiments of the present disclosure;

[0066] FIG7 is a structural diagram of a stator tooth according to some embodiments of the present disclosure;

[0067] FIG8 is a structural diagram of a stator yoke according to some embodiments of the present disclosure;

[0068] FIG9 is a partial enlarged view of the circle A in FIG8 ;

[0069] FIG10 is a structural diagram of a stator yoke according to some embodiments of the present disclosure from another perspective;

[0070] FIG11 is a structural diagram of a stator tooth crown according to some embodiments of the present disclosure;

[0071] FIG12 is a structural diagram of a stator core according to other embodiments of the present disclosure;

[0072] FIG13 is a structural diagram of a stator tooth crown according to other embodiments of the present disclosure;

[0073] FIG14 is a structural diagram of a stator core according to yet other embodiments of the present disclosure;

[0074] FIG15 is a structural diagram of a stator core according to yet other embodiments of the present disclosure from another perspective;

[0075] FIG16 is a structural diagram of a gear yoke transition piece according to yet other embodiments of the present disclosure;

[0076] FIG17 is a diagram showing the relationship between the magnetic resistance of the stator core and time in the related art and some embodiments of the present disclosure;

[0077] FIG18 is a graph showing the relationship between thrust and time of a linear motor in the related art and some embodiments of the present disclosure;

[0078] FIG19 is a simulation diagram of magnetic lines of force corresponding to two stator tooth crowns in related art and some embodiments of the present disclosure;

[0079] FIG20 is a simulation diagram of partial magnetic lines of force of a stator core according to some embodiments of the present disclosure (the stator crown is an integrated structure);

[0080] FIG21 is a simulation diagram of part of the magnetic lines of force of the stator core of some embodiments of the present disclosure (the stator crown is a split type);

[0081] FIG22 is a block diagram of a stator assembly according to some embodiments of the present disclosure;

[0082] FIG23 is a block diagram of a levitation motor according to some embodiments of the present disclosure;

[0083] FIG24 is a block diagram of a suspension system according to some embodiments of the present disclosure;

[0084] FIG25 is a block diagram of a vehicle according to some embodiments of the present disclosure.

[0085] Figure numerals: stator assembly 1000, stator core 100, stator tooth 1, center hole 11, first positioning groove 12, guide protrusion 13, second positioning groove 14, first lamination 15, tooth yoke transition piece 2, first positioning protrusion 21, guide groove 22, first plug-in protrusion 23, slit 24, positioning portion 25, stator yoke 3, first plug-in groove 31, head end 32, tail end 33, stator tooth crown 4, sub-crown 41, wire groove 42, bend 43, axial end face 44, circumferential side wall 45, second lamination 46, stator winding 200, stator assembly 2000; suspension motor 3000; suspension system 4000; vehicle 5000. DETAILED DESCRIPTION

[0086] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present disclosure and are not to be construed as limiting the present disclosure.

[0087] The disclosure below provides many different embodiments or examples for realizing different structures of the present disclosure. In order to simplify the disclosure of the present disclosure, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present disclosure. In addition, the present disclosure may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present disclosure provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0088] In the related art, during the operation of the suspension motor, the stator core will generate eddy current loss, thereby reducing the thrust and efficiency of the suspension motor, and there is room for improvement.

[0089] To this end, some embodiments of the present disclosure provide a stator core 100, which can be used in the stator assembly of a suspension motor, can effectively reduce eddy current loss, thereby helping to improve the thrust and efficiency of the suspension motor, enhance the operating performance of the suspension motor, and reduce the use cost of the suspension motor.

[0090] As shown in FIG. 1 , FIG. 2 , FIG. 14 and FIG. 15 , the stator core 100 according to some embodiments of the present disclosure includes: a stator tooth portion 1 , a stator yoke portion 3 and a tooth yoke transition piece 2 .

[0091] The stator yoke 3 is connected to the stator teeth 1. Methods for connecting the stator yoke 3 and the stator teeth 1 include, but are not limited to, welding, plugging, or clamping, or the stator yoke 3 and the stator teeth 1 are indirectly connected via other structural components. When connecting the stator yoke 3 and the stator teeth 1, the axis of the stator yoke 3 can be aligned with the axis of the stator teeth 1.

[0092] At least one of the stator yoke 3 and the stator tooth 1 is configured as a multi-layer structure, that is, the stator yoke 3 can be constructed as a multi-layer structure, the stator tooth 1 can be constructed as a multi-layer structure, or both the stator yoke 3 and the stator tooth 1 can be constructed as a multi-layer structure. For example, the multi-layer structure can be installed and set by stacking or winding. Therefore, compared with a whole-piece structural component (such as an integrated component with a single-layer structure), the multi-layer stator yoke 3 and stator tooth 1 can effectively block the eddy current circuit, thereby helping to reduce the eddy current loss of the stator yoke 3.

[0093] The tooth yoke transition piece 2 is respectively connected to the stator yoke 3 and the stator tooth 1 to connect the stator yoke 3 and the stator tooth 1. In this way, the stator yoke 3 and the stator tooth 1 can be relatively fixed through the tooth yoke transition piece 2. In this way, the tooth yoke transition piece 2 can eliminate the air gap between the stator yoke 3 and the stator tooth 1 of the multi-layer structure, or eliminate the air gap between the stator tooth 1 and the stator yoke 3 of the multi-layer structure, or eliminate the air gap between the stator yoke 3 and the stator tooth 1 of the multi-layer structure.

[0094] Therefore, by providing the tooth yoke transition piece 2, not only can the connection between the stator yoke 3 and the stator tooth 1 be achieved, but also the air gap between the stator yoke 3 and the stator tooth 1 can be eliminated, and the influence of the air gap at the connection between the stator tooth 1 and the stator yoke 3 on the magnetic field lines can be reduced, thereby greatly reducing the influence of the air gap formed in the motor on the magnetic field lines, which is beneficial to improving the motor thrust and increasing the motor operating efficiency.

[0095] According to the stator core 100 of some embodiments of the present disclosure, at least one of the stator yoke 3 and the stator tooth 1 is set to a multi-layer structure, which can greatly reduce the eddy current loss generated by the stator yoke 3 and the stator tooth 1. In addition, the tooth yoke transition piece 2 is set to reduce the influence of the air gap formed by the stator yoke 3, the stator tooth 1 and the connection between the stator yoke 3 and the stator tooth 1 on the magnetic field lines, thereby effectively improving the motor thrust and the overall operating efficiency of the motor.

[0096] In some embodiments, the tooth yoke transition piece 2 is located on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3. Thus, the tooth yoke transition piece 2 can play a magnetic conductive role on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3, thereby helping to reduce the magnetic resistance between the stator yoke portion 3 and the stator tooth portion 1, enhance the motor thrust, and increase the motor operating efficiency.

[0097] In some embodiments, the stator core 100 satisfies at least one of the following conditions:

[0098] The stator tooth portion 1 is a multi-layer structure, and the radial projections of the tooth yoke transition piece 2 and the stator tooth portion 1 at least partially overlap, that is, at least part of the tooth yoke transition piece 2 is located in the radial direction of the stator tooth portion 1. The tooth yoke transition piece 2 can be installed in the stator tooth portion 1 to eliminate the air gap between the multi-layer structure of the stator tooth portion 1 and the stator yoke portion 3, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0099] Alternatively, the stator yoke 3 is a multi-layer structure, and the axial projections of the tooth yoke transition piece 2 and the stator yoke 3 at least partially overlap, that is, at least part of the tooth yoke transition piece 2 is located in the axial direction of the stator yoke 3. For example, the tooth yoke transition piece 2 and the stator yoke 3 can be arranged axially opposite each other, so that the tooth yoke transition piece 2 can eliminate the air gap between the multi-layer structure of the stator yoke 3 and the stator tooth part 1, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0100] In some embodiments, the tooth yoke transition piece 2 is connected to the radial inner side of the stator tooth portion 1. A center hole 11 may be formed in the stator tooth portion 1 (refer to Figure 7). The tooth yoke transition piece 2 may be arranged in the center hole 11 to eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3 on the radial inner side of the stator tooth portion 1, thereby reducing the magnetic resistance of the stator tooth portion 1 and improving the operating efficiency of the motor.

[0101] In some embodiments, the axial extension of the yoke transition piece 2 is greater than or equal to the axial extension of the stator tooth portion 1. Thus, the yoke transition piece 2 and the stator tooth portion 1 can both be constructed as annular members, with the yoke transition piece 2 positioned within the stator tooth portion 1. The yoke transition piece 2 and the stator tooth portion 1 can be coaxially arranged, so that the yoke transition piece 2 can reduce the effect of the air gap on the magnetic drag force.

[0102] In some embodiments, the side surface of the tooth yoke transition piece 2 away from the stator yoke 3 is flush with the side surface of the stator tooth portion 1, and in the axial direction of the tooth yoke transition piece 2, the side surface of the tooth yoke transition piece 2 close to the stator yoke 3 is located between the stator tooth portion 1 and the stator yoke 3.

[0103] For example, as shown in Figure 1, the upper surface of the tooth yoke transition piece 2 in Figure 1 is flush with the upper surface of the stator tooth portion 1, and, as shown in Figure 2, the lower surface of the tooth yoke transition piece 2 in Figure 2 is located between the stator tooth portion 1 and the stator yoke portion 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3, thereby reducing the magnetic resistance generated by the air gap and the space between the stator tooth portion 1 and the stator yoke portion 3.

[0104] In some embodiments, the tooth-yoke transition piece 2 is made of a magnetically conductive material, allowing it to guide magnetic field lines, reduce the effect of the air gap between the stator teeth 1 and the stator yoke 3 on the magnetic field lines, and reduce magnetic drag. For example, the stator yoke 3 and the stator teeth 1 can be connected via the tooth-yoke transition piece 2. The tooth-yoke transition piece 2 is formed as an annular magnetically conductive material. In the axial direction of the stator core 100, the tooth-yoke transition piece 2 and the stator yoke 3 are stacked, and the tooth-yoke transition piece 2 and the center hole 11 are positioned and matched to achieve secure installation.

[0105] In some embodiments, the yoke transition piece 2 is an integral piece, so that the yoke transition piece 2 can be formed in one piece, thereby reducing processing costs and facilitating installation.

[0106] In some embodiments, the yoke transition piece 2 is a multi-layer structure, and the stator tooth portion 1 is a multi-layer structure. The number of layers of the yoke transition piece 2 is less than the number of layers of the stator tooth portion 1, so that the yoke transition piece 2 has better magnetic conductivity, and both the yoke transition piece 2 and the stator tooth portion 1 can reduce eddy current loss and improve the operating efficiency of the motor.

[0107] In some embodiments, as shown in FIG7 , the stator tooth 1 includes a plurality of stacked first laminations 15 . For example, the plurality of first laminations 15 are stacked axially along the stator core 100 , with a center hole 11 defined in the center of the stator tooth 1 . Specifically, the stator tooth 1 includes a plurality of first laminations 15 stacked axially along the stator core 100 to form a single, integral component. The thickness of the plurality of first laminations 15 can be set to be the same, or at least two first laminations 15 can have different thicknesses. Adjacent first laminations 15 can be connected by bonding or other means to form the stator tooth 1 as a stable, integral component, preventing the adjacent first laminations 15 from separating from each other. Thus, forming the stator tooth 1 by axial lamination helps reduce eddy current losses in the stator tooth 1 . Furthermore, the technology for manufacturing laminations using stamping is relatively mature, making the manufacturing process of the stator tooth 1 more feasible.

[0108] In some embodiments, each first laminate 15 may be shaped as an annular sheet, so that a plurality of first laminates 15 are axially stacked to form an annular member having a central hole 11 in the middle.

[0109] In some embodiments, as shown in Figures 8 and 9, the stator yoke 3 is formed as a wound component, that is, the stator yoke 3 is a multi-layer component formed by sequentially winding in the circumferential direction. For example, the stator yoke 3 can be formed by spirally winding a whole piece of silicon steel sheet around an axis. That is, as shown in Figure 9, the stator yoke 3 includes a stator yoke body, a first end of the stator yoke 3 is located on the inner side of the stator yoke body, and a second end of the stator yoke 3 is located on the outer side of the stator yoke body. For example, the stator yoke 3 can be formed by a stamping and winding process, and the winding head end 32 and tail end 33 can be fixed by resistance welding or other methods. Therefore, compared with the structure of a whole piece of conductor, the stator yoke 3 formed by circumferential winding effectively blocks the eddy current circuit, thereby helping to reduce the eddy current loss of the stator yoke 3. In addition, the process of winding the magnetic core of the axial flux motor is relatively mature, making the manufacturing process of the stator yoke 3 more feasible.

[0110] Therefore, the coil winding can be nested on the stator yoke 3, and the stator yoke 3 can be placed on the stator tooth 1. When the motor is running, the magnetic flux mainly passes through the iron core along the radial direction of the stator tooth 1 and the axial direction of the stator yoke 3. Therefore, the stator tooth 1 of the axially stacked silicon steel sheets can better block the tooth eddy current circuit to reduce the eddy current loss of the stator tooth 1, and the stator yoke 3 of the circumferentially wound silicon steel sheets can also effectively block the eddy current circuit of the stator yoke 3 to reduce the eddy current loss of the stator yoke 3. In this way, the combination of the stator tooth 1 of the axially stacked silicon steel sheets and the stator yoke 3 of the circumferentially wound silicon steel sheets can further increase the motor thrust and the total motor loss, which is beneficial to improving the motor operation efficiency.

[0111] In some embodiments, the tooth yoke transition piece 2 is connected to one axial side of the stator yoke 3, so that the tooth yoke transition piece 2 can play a magnetic conductive role on the axial side of the stator yoke 3. That is, the tooth yoke transition piece 2 and the stator yoke 3 are stacked and distributed in the axial direction, so that the tooth yoke transition piece 2 can eliminate the air gap between the end of the stator yoke 3 and the stator tooth part 1, thereby helping to reduce the influence of the air gap on the magnetic field.

[0112] In some embodiments, the tooth yoke transition piece 2 and the stator yoke 3 are axially positioned and matched, that is, a positioning structure is designed between the connecting structure (such as the tooth yoke transition piece 2) and the stator yoke 3 so that the tooth yoke transition piece 2 and the stator yoke 3 are relatively fixed in the axial direction, so that the stator yoke 3 will not detach axially from the tooth yoke transition piece 2.

[0113] Therefore, after the tooth yoke transition piece 2 and the stator yoke 3 are axially positioned, the tooth yoke transition piece 2 is located at one axial end of the stator yoke 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator yoke 3 and the stator tooth portion 1 caused by the multi-layer structure of the stator yoke 3. During the use of the suspension motor, the tooth yoke transition piece 2 will not automatically detach axially relative to the stator yoke 3, thereby ensuring the stability of the assembly of the tooth yoke transition piece 2 and the stator yoke 3, thereby reliably reducing the influence of the air gap on the magnetic field lines.

[0114] In addition, the circumferential positioning of the yoke transition piece 2 and the center hole 11 is coordinated, that is, the yoke transition piece 2 can be circumferentially positioned with the stator tooth portion 1 in the center hole 11 through a positioning structure, so that the stator tooth portion 1 and the yoke transition piece 2 are relatively fixed in the circumferential direction, avoiding relative movement of the stator tooth portion 1 and the yoke transition piece 2 along the circumferential direction, thereby ensuring the stability of the suspension motor.

[0115] In some embodiments, the yoke transition piece 2 is connected to the stator tooth portion 1 via a first mating structure and a second mating structure. For example, the yoke transition piece 2 and the stator yoke portion 3 may be circumferentially limited by the first and second mating structures. Alternatively, the yoke transition piece 2 and the stator yoke portion 3 may be axially guided by the first and second mating structures to achieve the connection and installation of the yoke transition piece 2 and the stator yoke portion 3.

[0116] In some embodiments, as shown in Figures 3, 4, and 7, one of the first and second mating structures is a first positioning protrusion 21, and the other is a first positioning groove 12. The first positioning protrusion 21 and the first positioning groove 12 are plugged together to limit the circumferential position of the stator tooth portion 1. That is, one of the yoke transition piece 2 and the stator tooth portion 1 is provided with the first positioning protrusion 21, and the other is provided with the first positioning groove 12. The first positioning protrusion 21 and the first positioning groove 12 are plugged together to limit the circumferential position of the stator tooth portion 1, thereby fixing the yoke transition piece 2 and the stator tooth portion 1 relative to each other in the circumferential direction.

[0117] For example, a first positioning protrusion 21 can be provided on the yoke transition piece 2, and a first positioning groove 12 can be provided on the stator tooth portion 1, or a first positioning protrusion 21 can be provided on the stator tooth portion 1, and a first positioning groove 12 can be provided on the yoke transition piece 2, both of which can achieve the positioning and plugging of the yoke transition piece 2 and the stator tooth portion 1. As shown in Figures 3 and 4, the first positioning protrusion 21 is provided on the outer peripheral wall of the yoke transition piece 2, and as shown in Figure 7, the first positioning groove 12 is provided on the inner peripheral wall of the stator tooth portion 1, so that the first positioning protrusion 21 of the yoke transition piece 2 is plugged into the first positioning groove 12 of the stator tooth portion 1 to perform circumferential limit fit.

[0118] Both the first positioning protrusion 21 and the first positioning groove 12 can be provided in a plurality, and the plurality of first positioning protrusions 21 and the plurality of first positioning grooves 12 are matched one-to-one, so that the stator tooth portion 1 and the tooth yoke transition piece 2 are circumferentially limited at multiple positions, thereby improving the reliability of the limit. For example, as shown in Figures 3 and 4, the first positioning protrusion 21 is provided in three numbers, and the three first positioning protrusions 21 are spaced apart and distributed in the circumferential direction of the tooth yoke transition piece 2. Moreover, as shown in Figure 7, the first positioning grooves 12 are provided in three numbers, and the three first positioning grooves 12 are spaced apart and distributed in the circumferential direction of the stator tooth portion 1. Thus, as shown in Figures 1 and 2, the three first positioning protrusions 21 and the three first positioning grooves 12 are spaced apart in the circumferential direction of the stator core 100 to form three groups of positioning structures, which greatly increases the matching stability of the stator tooth portion 1 and the tooth yoke transition piece 2.

[0119] In some embodiments, as shown in Figure 7, on the circumference of the stator tooth portion 1, the relative side walls of the first positioning groove 12 extend obliquely in the direction toward the center hole 11 toward each other, that is, the first positioning groove 12 includes two inner side walls that are relatively distributed on the circumference of the stator tooth portion 1, and the two inner side walls are inclined side walls, that is, the circumferential spacing between the two inner side walls gradually decreases from the outside to the inside along the radial direction of the stator tooth portion 1. In other words, the first positioning groove 12 can be constructed as a dovetail groove that gradually decreases from the outside to the inside in the radial direction of the stator tooth portion 1.

[0120] The first positioning protrusion 21 and the first positioning groove 12 are conformally matched, as shown in Figures 3 and 4, that is, the shapes of the first positioning protrusion 21 and the first positioning groove 12 can be constructed to be the same, that is, the first positioning protrusion 21 can also be constructed as a dovetail-shaped protrusion. In this way, after the first positioning protrusion 21 is extended into the first positioning groove 12, the first positioning protrusion 21 and the first positioning groove 12 cooperate to not only achieve circumferential limitation between the stator tooth portion 1 and the tooth yoke transition piece 2, but also utilize the inclined outer side wall of the first positioning protrusion 21 and the inclined inner side wall of the first positioning groove 12 to perform wedging limitation, so that the stator tooth portion 1 and the tooth yoke transition piece 2 can also achieve effective radial anti-slip effect through the cooperation of the first positioning protrusion 21 and the first positioning groove 12.

[0121] It should be noted that before the multiple first laminations 15 are stacked into the stator tooth portion 1, each first lamination 15 is constructed to have a groove portion. After the multiple first laminations 15 are stacked, the groove portions of the multiple first laminations 15 are aligned along the axial direction of the stator tooth portion 1 to jointly construct the first positioning groove 12.

[0122] In some embodiments, the first positioning protrusion 21 is provided on the outer peripheral wall of the yoke transition piece 2, the first positioning groove 12 is located in the stator tooth portion 1, the inner wall of the stator tooth portion 1 is recessed outward, and the first positioning groove 12 is connected to the center hole 11 of the stator tooth portion 1, that is, in actual construction, the first positioning protrusion 21 can be directly formed on the outer peripheral wall of the yoke transition piece 2 when the yoke transition piece 2 is processed, and the first positioning groove 12 can be formed together with the center hole 11 when the stator tooth portion 1 is processed, thereby helping to reduce the setting cost.

[0123] Therefore, when the yoke transition piece 2 is installed in the center hole 11, the first positioning protrusion 21 extends from the outer peripheral wall of the yoke transition piece 2 to the first positioning groove 12 to achieve the limiting cooperation between the yoke transition piece 2 and the stator tooth part 1, which has a simple structure and is easy to install.

[0124] As shown in Figures 3 and 4 , the first positioning protrusion 21 is provided on the outer circumferential wall of the yoke transition piece 2, and the thickness of the first positioning protrusion 21 can be set to be the same as the axial thickness of the yoke transition piece 2, facilitating the integral molding of the first positioning protrusion 21 and the yoke transition piece 2. As shown in Figure 7 , the first positioning groove 12 is provided on the inner circumferential wall of the stator tooth portion 1, and the first positioning groove 12 can be set to pass through the stator tooth portion 1 in the axial direction, facilitating the co-molding of the first positioning groove 12 and the center hole 11.

[0125] In some embodiments, as shown in Figures 3, 4, and 7, one of the first and second mating structures is a guide protrusion 13, and the other is a guide groove 22, with the guide protrusion 13 mating with the guide groove 22. Specifically, one of the yoke transition piece 2 and the stator tooth 1 is provided with a guide protrusion 13, and the other is provided with a guide groove 22. The guide protrusion 13 is disposed on the inner side of the stator tooth 1 and extends axially along the stator core 100. The guide protrusion 13 is adapted to mate with the guide groove 22, thereby both circumferentially limiting the yoke transition piece 2 by the stator tooth 1 and guiding the assembly direction of the yoke transition piece 2. Thus, by providing the guide protrusion 13 and the guide groove 22, the yoke transition piece 2 and the stator tooth 1 can be guided in the axial direction during installation, thereby improving the installation efficiency of the yoke transition piece 2 and the stator tooth 1.

[0126] In actual design, the guide protrusion 13 can be provided on the yoke transition piece 2, and the guide groove 22 can be provided on the stator tooth portion 1, or the guide protrusion 13 can be provided on the stator tooth portion 1 as shown in Figure 7, and the guide groove 22 can be provided on the yoke transition piece 2 as shown in Figures 3-6. The setting method is flexible and optional.

[0127] Therefore, by setting the guide protrusion 13 and the guide groove 22 for plug-in cooperation, the tooth yoke transition piece 2 can be plug-in assembled with the stator tooth portion 1 along the axial direction, that is, during actual installation, the tooth yoke transition piece 2 is located at one axial end of the stator tooth portion 1 and is opposite to the center hole 11, and the guide protrusion 13 and the guide groove 22 are opposite to each other along the axial direction of the stator tooth portion 1, and the first positioning groove 12 and the first positioning protrusion 21 are also opposite to each other along the axial direction of the stator tooth portion 1, and then the tooth yoke transition piece 2 is pushed into the center hole 11, and under the guiding action of the guide protrusion 13 and the guide groove 22, quick installation is achieved, which is conducive to improving the axial installation efficiency.

[0128] In some embodiments, the outer peripheral wall of the guide protrusion 13 is formed as an arc surface, the guide groove 22 is formed as an arc groove, and the curvature of the arc surface and the curvature of the arc groove are set to be the same, so that the guide protrusion 13 can be smoothly guided and matched with the guide groove 22.

[0129] The axis of the arc surface and the axis of the arc groove are parallel to the axis of the stator core 100, so that the guide protrusion 13 and the guide groove 22 can cooperate along the axial direction to avoid the guide jam.

[0130] Of course, in actual construction, the outer peripheral wall of the guide protrusion 13 can be constructed as an arc surface, but is not limited to an arc surface. It can also be constructed as other types of surfaces, such as a multi-section bent prismatic surface, etc. The setting method is flexible and optional.

[0131] In some embodiments, the guide groove 22 is provided on the outer peripheral wall of the yoke transition piece 2, and the guide protrusion 13 is located on the stator tooth portion 1 and protrudes inward from the inner wall of the stator tooth portion 1. As shown in Figures 3 and 4, the guide groove 22 and the first positioning protrusion 21 are respectively provided on the outer peripheral wall of the yoke transition piece 2. That is, in actual construction, the guide groove 22 and the first positioning protrusion 21 can be respectively provided on the outer peripheral wall of the yoke transition piece 2, and the guide groove 22 and the first positioning protrusion 21 can be spaced apart and distributed in the circumferential direction of the yoke transition piece 2. Therefore, when the yoke transition piece 2 is installed in the center hole 11, it can be assembled simultaneously with the guide protrusion 13 and the first positioning groove 12 of the stator tooth portion 1. That is, there is no need to assemble the guide structure and the positioning structure separately. Positioning and matching are achieved during the guiding process, which is conducive to improving installation efficiency and ensuring installation accuracy.

[0132] In some embodiments, there are multiple guide grooves 22 and multiple first positioning protrusions 21, and the multiple first positioning protrusions 21 and multiple guide grooves 22 are staggered along the circumference of the tooth yoke transition piece 2 to achieve an staggered distribution of guiding and positioning cooperation with the stator tooth portion 1 in the circumferential direction of the tooth yoke transition piece 2, so that the guiding and positioning of the stator tooth portion 1 and the tooth yoke transition piece 2 are more balanced.

[0133] For example, as shown in Figures 3 and 4, there are three guide grooves 22 and three first positioning protrusions 21. The three first positioning protrusions 21 and the three guide grooves 22 are spaced apart and staggered along the circumferential direction on the outer wall of the tooth yoke transition piece 2. Of course, the number of guide grooves 22 and first positioning protrusions 21 includes but is not limited to three, and can be flexibly set according to actual guiding and positioning requirements.

[0134] In some embodiments, in the axial direction of the stator core 100, a first plug-in portion is provided at the end of the tooth yoke transition piece 2, and a second plug-in portion is provided at the end of the stator yoke 3, and the first plug-in portion and the second plug-in portion are plug-fitted. In this way, when the tooth yoke transition piece 2 and the stator yoke 3 are stacked axially, the tooth yoke transition piece 2 and the stator yoke 3 can be axially connected through the plug-fitting of the first plug-in portion and the second plug-in portion.

[0135] In some embodiments, the first plug-in portion may be provided on an end surface of one end of the gear yoke transition piece 2, and the second plug-in portion may be provided on an end surface of one end of the stator yoke 3. When the gear yoke transition piece 2 and the stator yoke 3 are stacked axially, the end surface of one end of the gear yoke transition piece 2 and the end surface of one end of the stator yoke 3 are aligned axially with each other in the stator core 100, and the first plug-in portion and the second plug-in portion are also aligned axially with each other in the stator core 100, thereby enabling the gear yoke transition piece 2 and the stator yoke 3 to be plugged and installed by axially approaching each other.

[0136] Therefore, after the first plug-in part and the second plug-in part are axially plugged in and matched, the first plug-in part and the second plug-in part can press against each other during the circumferential relative movement along the stator core 100 to limit the relative movement of the tooth yoke transition piece 2 and the stator yoke part 3 in the circumferential direction and avoid relative movement. Moreover, through the tight fit after the first plug-in part and the second plug-in part are plugged in, the axial slippage of the tooth yoke transition piece 2 and the stator yoke part 3 can be reduced, and the installation is more stable.

[0137] In some embodiments, as shown in Figures 3 and 4 , the first plug-in portion includes a plurality of first plug-in protrusions 23 protruding in the axial direction. That is, the first plug-in portion can be configured as a plurality of first plug-in protrusions 23. The first plug-in protrusions 23 can be protrudingly provided on the end surface of the gear yoke transition piece 2, and the plurality of first plug-in protrusions 23 are spaced apart and distributed circumferentially of the gear yoke transition piece 2. Furthermore, as shown in Figure 8 , the second plug-in portion includes a plurality of first plug-in grooves 31. The first plug-in grooves 31 are configured as recessed grooves in the end surface of the stator yoke 3, and the plurality of first plug-in grooves 31 are spaced apart and distributed circumferentially of the stator yoke 3.

[0138] Therefore, when the stator yoke 3 and the tooth yoke transition piece 2 are axially connected, multiple first plug-in protrusions 23 and multiple first plug-in grooves 31 can be plugged in and matched respectively, so that the stator yoke 3 and the tooth yoke transition piece 2 can be tightly plugged in and matched at multiple positions in the circumferential direction, thereby improving the compactness of the connection between the stator yoke 3 and the tooth yoke transition piece 2 and preventing axial slippage.

[0139] For example, as shown in Figures 3 and 4 , the number of first insertion protrusions 23 can be nine, and the nine first insertion protrusions 23 are evenly spaced and distributed along the circumferential direction on the end surface of the gear yoke transition piece 2. Furthermore, as shown in Figures 8 and 10 , the number of first insertion grooves 31 can also be nine, and the nine first insertion grooves 31 are evenly spaced and distributed along the circumferential direction on the end surface of the stator yoke 3. Thus, during actual installation, the nine first insertion protrusions 23 can be correspondingly inserted into the nine first insertion grooves 31, achieving plug-in installation and greatly improving the assembly tightness between the stator yoke 3 and the gear yoke transition piece 2.

[0140] In some embodiments, as shown in Figures 5 and 6, the yoke transition piece 2 is provided with a slit 24. The slit 24 can be set as a thin slit that penetrates the axial direction of the yoke transition piece 2 and does not penetrate in the radial direction. By setting the slit 24, part of the eddy current circuit of the yoke transition piece 2 can be interrupted, thereby reducing the eddy current loss, thereby reducing the overall loss of the motor, and improving the motor thrust and operating efficiency.

[0141] Furthermore, the radially outer side of the slit 24 is open, and a thermally conductive adhesive can be injected into the slit 24 to increase the thermal conductivity, thereby reducing the temperature rise of the stator core 100 and achieving the purpose of reducing iron loss.

[0142] In some embodiments, as shown in Figures 5 and 6, the yoke transition piece 2 is provided with a plurality of slits 24. The plurality of slits 24 are spaced apart in the circumferential direction of the yoke transition piece 2 so that the yoke transition piece 2 can interrupt the eddy current circuit at multiple positions in the circumferential direction, thereby significantly reducing the worm gear loss and improving the motor performance.

[0143] As shown in FIG. 5 and FIG. 6 , the slits 24 may be distributed in groups in the circumferential direction of the gear yoke transition piece 2 , and each group includes a plurality of slits 24 .

[0144] For example, the slit 24 can be provided between two adjacent first plug-in protrusions 23, that is, there are multiple first plug-in protrusions 23, and the multiple first plug-in protrusions 23 are spaced apart and distributed circumferentially of the yoke transition piece 2, that is, the multiple first plug-in protrusions 23 and the multiple slits 24 can be staggered in the circumferential direction of the yoke transition piece 2, so that the slit 24 is connected to the groove between the two adjacent first plug-in protrusions 23, so that the groove can be formed together with the slit 24, thereby reducing the difficulty of forming.

[0145] In some embodiments, as shown in Figures 1, 2, 5, and 6, the stator core 100 further includes a stator crown 4, which is disposed radially outward of the stator teeth 1. The stator crown 4 can be configured as an annular member, which can be configured as a closed ring or an open ring, so that the stator crown 4 can be sleeved outside the stator teeth 1, thereby shielding the outside of the stator teeth 1, that is, the stator teeth 1 are accommodated within the stator crown 4.

[0146] The stator crown 4 can be made of magnetic conductive material DT4, No. 10 steel, or other types of magnetic conductive materials. Here, the magnetic conductive material DT4 can refer to high-quality steel with a content of more than 99.5%, which is a low-carbon, low-sulfur, and low-phosphorus iron.

[0147] In the axial direction of the stator core 100, at least one axial end portion of the stator tooth crown 4 protrudes from the axial end face 44 of the stator tooth portion 1 (as shown in FIG12 ). It should be noted that when the stator core 100 is installed in the stator assembly, multiple stator cores 100 can be stacked in sequence along the axial direction, and a stator slot for placing the winding is formed between two adjacent stator tooth portions 1. By arranging the stator tooth crown 4 on the outside of the stator tooth portion 1, the stator slot can be partially blocked by the portion of the stator tooth crown 4 protruding from the stator tooth portion 1 in the axial direction, thereby optimizing the stator slot, thereby reducing the magnetic resistance of the stator core 100, thereby helping to reduce the thrust fluctuation of the motor and ensure the operating efficiency of the motor.

[0148] In actual design, one end of the stator tooth crown 4 can protrude from the end face of the stator tooth portion 1, or both ends of the stator tooth crown 4 can be configured to protrude from the end faces of the stator tooth portion 1 to enhance the optimization effect on the stator slot. For example, as shown in Figure 2, the stator tooth crown 4 is configured to protrude from the upper end face of the stator tooth portion 1 to reduce the magnetic resistance on the upper side of the stator tooth portion 1. This configuration is flexible and optional.

[0149] The stator yoke 3 is located at one end of the stator tooth portion 1, and the portion of the stator tooth crown 4 protruding from the stator tooth portion 1 can be located at the same end of the stator tooth portion 1 as the stator yoke 3, so that after the stator winding 200 (as shown in Figures 20 and 21) is wound on the stator yoke 3, the stator tooth crown 4 is located on the outside of the stator winding 200 to reduce the magnetic resistance.

[0150] In some embodiments, as shown in Figures 12 and 13, the stator crown 4 includes a plurality of second laminations 46 stacked along the axial direction of the stator core 100, that is, the stator crown 4 is formed by stacking a plurality of second laminations 46 along the axial direction. In this way, the stator crown 4 can be divided into a plurality of second laminations 46 and processed separately, which helps to reduce the processing difficulty of the stator crown 4 and reduce the setting cost.

[0151] It should be noted that the thickness of the plurality of second laminations 46 can be set to be the same, or the thickness of at least two second laminations 46 can be set to be different. Adjacent second laminations 46 can be connected by bonding or other means to form the stator crown 4 as a stable whole and prevent the adjacent second laminations 46 from separating from each other. Forming the stator crown 4 in the axial lamination direction also helps reduce eddy current losses in the stator crown 4 and improve motor performance.

[0152] In addition, in actual design, the thickness of the second laminations 46 can be set to be the same as the thickness of the first laminations 15, and the number of the second laminations 46 can be a multiple of the number of the first laminations 15, so that the stacked second laminations 46 can protrude from the stator teeth 1.

[0153] In some embodiments, as shown in FIG13 , in the circumferential direction of the stator core 100 , the stator tooth crown 4 includes a plurality of sub-crown portions 41 spaced apart along the circumferential direction, that is, the stator tooth crown 4 can be formed by a plurality of sub-crown portions 41 to reduce the difficulty of processing the stator tooth crown 4 , and the plurality of sub-crown portions 41 can be respectively connected to the outer peripheral wall of the stator tooth portion 1 to reduce the difficulty of installing the stator tooth crown 4 .

[0154] As shown in FIG13 , the wire slot 42 of the stator tooth crown 4 is defined by the adjacent sub-crown portion 41 , so that the stator winding 200 located in the stator slot can extend out of or into the wire slot 42 , making it convenient for threading the stator winding 200 and facilitating the installation and coordination of the stator winding 200 and the stator core 100 .

[0155] For example, three sub-crown portions 41 may be provided, as shown in Figures 1, 2, 12, and 13. The three sub-crown portions 41 are evenly spaced and distributed in the circumferential direction of the stator tooth portion 1, so that three wire grooves 42 are formed on the outer peripheral wall of the stator tooth portion 1. It will be understood that the stator core 100 in some embodiments of the present disclosure may be applicable to a three-phase permanent magnet synchronous levitation motor, and the three-phase wiring can be respectively routed through the three wire grooves 42 to facilitate installation of the motor.

[0156] Therefore, by providing the stator crown 4, not only the stator slot is optimized and the magnetic resistance of the stator core 100 is reduced, but also the wire slot 42 is defined to facilitate the threading of the stator winding 200, with a simple structure and easy use.

[0157] In other embodiments, as shown in Figures 1, 2 and 11, the stator crown 4 is formed as an annular integral part, and the outer peripheral wall of the stator crown 4 is provided with a plurality of wire grooves 42. In other words, the stator crown 4 can be constructed as an integral part and be annular as a whole, so that the stator crown 4 can be integrally mounted outside the stator tooth portion 1, thereby reducing the assembly steps of the stator crown 4 and the stator tooth portion 1 and improving the assembly efficiency.

[0158] Furthermore, the stator crown 4 is constructed as a single piece, requiring only three separate wire slots 42. This eliminates the need for axial penetration of the stator crown 4, further facilitating molding. Furthermore, the stator crown 4 is sleeved over the stator tooth 1, maintaining a relatively stable radial positional relationship between the stator crown 4 and the stator tooth 1. This prevents radial outward separation of the stator tooth 1 from the stator crown 4 and improves structural stability.

[0159] In other words, the stator crown 4 can be constructed as a split type (as shown in Figures 12 and 13) or as an integrated type (as shown in Figure 11), both of which can reduce magnetic drag and improve magnetic lines of force. For example, as shown in Figure 20, the stator crown 4 is an integrated type, while as shown in Figure 21, the stator crown 4 is a split type. Comparing the magnetic lines of force of the split and integrated types, it can be seen that the integrated stator crown 4 can more effectively reduce magnetic drag than the split type, making the magnetic lines of force smoother when passing through the integrated stator crown 4, thereby effectively reducing magnetic drag and increasing motor thrust and efficiency.

[0160] In some embodiments, as shown in FIG11 , a portion of the stator tooth crown 4 is bent inward to define a bent portion 43 having a wire passing groove 42 . As shown in FIG7 , a second positioning groove 14 is provided on the peripheral wall of the stator tooth portion 1 , and the bent portion 43 is located within the second positioning groove 14 . That is, by providing the bent portion 43 , the stator tooth crown 4 can be positioned and matched with the stator tooth portion 1 inside the bent portion 43 , thereby achieving circumferential limited matching of the stator tooth crown 4 and the stator tooth portion 1 . In addition, the wire passing groove 42 on the bent portion 43 can be used for threading.

[0161] For example, three bent portions 43 are provided on the inner peripheral wall of the stator tooth crown 4. In addition, three second positioning grooves 14 are provided on the outer peripheral wall of the stator tooth portion 1, so that the three bent portions 43 extend into the three second positioning grooves 14 respectively for positioning and matching, thereby improving the compactness of the assembly of the bent portions 43 and the second positioning grooves 14. Moreover, the winding wire of the stator winding 200 can also pass through or pass through the wire grooves 42 of the three bent portions 43. The structure is simple and the installation is convenient, which is conducive to the assembly of the entire motor.

[0162] In some embodiments, as shown in FIG12 , the stator tooth crown 4 includes a circumferential sidewall 45 and multiple axial end faces 44, with a transition chamfer provided between the circumferential sidewall 45 and at least one of the multiple axial end faces 44. In other words, the stator tooth crown 4 includes two axial end faces 44 that face away from each other in the axial direction, and a circumferential inner sidewall and a circumferential outer sidewall that face away from each other in the radial direction. For example, a transition chamfer may be provided at the junction of the circumferential outer sidewall with one axial end face 44, at the junction of the circumferential outer sidewall with both axial end faces 44, or at the junction of the circumferential inner sidewall with at least one of the axial end faces 44.

[0163] Therefore, by setting the transition chamfer, the corners of the stator tooth crown 4 can be made relatively smooth, avoiding the corners being too sharp, thereby preventing the corners from being easily deformed under force, and reducing the risk of the corners of the stator tooth crown 4 cutting other objects, thereby improving the safety of the stator tooth crown 4.

[0164] For example, the transition chamfer may be configured as a straight angle, a curved angle, or another type of chamfer.

[0165] Some embodiments of the present disclosure further provide another stator core 100 .

[0166] As shown in FIG. 1 , FIG. 2 , FIG. 14 and FIG. 15 , the stator core 100 according to some embodiments of the present disclosure includes: a stator tooth portion 1 , a stator yoke portion 3 and a tooth yoke transition piece 2 .

[0167] A radial magnetic path is formed on the stator tooth portion 1, an axial magnetic path is formed on the stator yoke portion 3, and a connecting magnetic path is formed on the tooth yoke transition piece 2. The magnetic path of the stator core 100 includes a radial magnetic path, an axial magnetic path and a connecting magnetic path. The connecting magnetic path is used to connect the radial magnetic path and the axial magnetic path.

[0168] Therefore, by setting the tooth yoke transition piece 2, the radial magnetic path and the axial magnetic path of the stator yoke 3 and the stator tooth part 1 can be connected, thereby reducing the magnetic resistance between the radial magnetic path and the axial magnetic path, which is beneficial to improving the motor thrust and increasing the motor operating efficiency.

[0169] In some embodiments, the tooth yoke transition piece 2 is located on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3. Thus, the tooth yoke transition piece 2 can play a magnetic conductive role on the magnetic path from the stator tooth portion 1 to the stator yoke portion 3, thereby helping to reduce the magnetic resistance between the stator yoke portion 3 and the stator tooth portion 1, enhance the motor thrust, and increase the motor operating efficiency.

[0170] In some embodiments, the stator core 100 satisfies at least one of the following conditions:

[0171] The stator tooth portion 1 is a multi-layer structure, and the radial projections of the tooth yoke transition piece 2 and the stator tooth portion 1 at least partially overlap, that is, at least part of the tooth yoke transition piece 2 is located in the radial direction of the stator tooth portion 1. The tooth yoke transition piece 2 can be installed in the stator tooth portion 1 so that the tooth yoke transition piece 2 can eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3 caused by the stator tooth portion 1 being arranged as a multi-layer structure, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0172] Alternatively, the stator yoke 3 is a multi-layer structure, and the axial projections of the tooth yoke transition piece 2 and the stator yoke 3 at least partially overlap, that is, at least part of the tooth yoke transition piece 2 is located in the axial direction of the stator yoke 3. For example, the tooth yoke transition piece 2 and the stator yoke 3 can be arranged axially opposite to each other, so that the tooth yoke transition piece 2 can reduce the air gap between the stator yoke 3 and the stator tooth portion 1, thereby reducing the influence of the magnetic resistance caused by the air gap.

[0173] In some embodiments, the yoke transition piece 2 is connected to the radial inner side of the stator tooth portion 1. A center hole 11 may be formed in the stator tooth portion 1 (refer to Figure 7). The yoke transition piece 2 may be arranged in the center hole 11 to eliminate the air gap, thereby reducing the magnetic resistance of the stator tooth portion 1 and improving the operating efficiency of the motor.

[0174] In some embodiments, the axial extension of the yoke transition piece 2 is greater than or equal to the axial extension of the stator tooth portion 1. Thus, the yoke transition piece 2 and the stator tooth portion 1 can both be constructed as annular members, with the yoke transition piece 2 positioned within the stator tooth portion 1. The yoke transition piece 2 and the stator tooth portion 1 can be coaxially arranged, so that the yoke transition piece 2 can reduce the effect of the air gap on the magnetic drag force.

[0175] In some embodiments, the side surface of the tooth yoke transition piece 2 away from the stator yoke 3 is flush with the side surface of the stator tooth portion 1, and in the axial direction of the tooth yoke transition piece 2, the side surface of the tooth yoke transition piece 2 close to the stator yoke 3 is located between the stator tooth portion 1 and the stator yoke 3.

[0176] For example, as shown in Figure 1, the upper surface of the tooth yoke transition piece 2 in Figure 1 is flush with the upper surface of the stator yoke 3, and, as shown in Figure 2, the lower surface of the tooth yoke transition piece 2 in Figure 2 is located between the stator tooth portion 1 and the stator yoke portion 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator tooth portion 1 and the stator yoke portion 3, thereby reducing the magnetic resistance generated by the air gap and the space between the stator tooth portion 1 and the stator yoke portion 3.

[0177] In some embodiments, the tooth-yoke transition piece 2 is made of a magnetically conductive material, allowing it to guide magnetic field lines, reduce the effect of the air gap between the stator teeth 1 and the stator yoke 3 on the magnetic field lines, and reduce magnetic drag. For example, the stator yoke 3 and the stator teeth 1 can be connected via the tooth-yoke transition piece 2. The tooth-yoke transition piece 2 is formed as an annular magnetically conductive material. In the axial direction of the stator core 100, the tooth-yoke transition piece 2 and the stator yoke 3 are stacked, and the tooth-yoke transition piece 2 and the center hole 11 are positioned and matched to achieve secure installation.

[0178] In some embodiments, the yoke transition piece 2 is an integral piece, so that the yoke transition piece 2 can be formed in one piece, thereby reducing processing costs and facilitating installation.

[0179] In some embodiments, the yoke transition piece 2 is a multi-layer structure, and the stator tooth portion 1 is a multi-layer structure. The number of layers of the yoke transition piece 2 is less than the number of layers of the stator tooth portion 1, so that the yoke transition piece 2 has better magnetic conductivity, and both the yoke transition piece 2 and the stator tooth portion 1 can reduce eddy current loss and improve the operating efficiency of the motor.

[0180] In some embodiments, as shown in FIG7 , the stator tooth 1 includes a plurality of stacked first laminations 15 . For example, the plurality of first laminations 15 are stacked axially along the stator core 100 , with a center hole 11 defined in the center of the stator tooth 1 . Specifically, the stator tooth 1 includes a plurality of first laminations 15 stacked axially along the stator core 100 to form a single, integral component. The thickness of the plurality of first laminations 15 can be set to be the same, or at least two first laminations 15 can have different thicknesses. Adjacent first laminations 15 can be connected by bonding or other means to form the stator tooth 1 as a stable, integral component, preventing the adjacent first laminations 15 from separating from each other. Thus, forming the stator tooth 1 by axial lamination helps reduce eddy current losses in the stator tooth 1 . Furthermore, the technology for manufacturing laminations using stamping is relatively mature, making the manufacturing process of the stator tooth 1 more feasible.

[0181] In some embodiments, each first laminate 15 may be shaped as an annular sheet, so that a plurality of first laminates 15 are axially stacked to form an annular member having a central hole 11 in the middle.

[0182] In some embodiments, as shown in Figures 8 and 9, the stator yoke 3 is formed as a wound part, that is, the stator yoke 3 is a multi-layer part formed by winding in sequence along the circumferential direction. For example, the stator yoke 3 can be formed by spirally winding a whole piece of silicon steel sheet around the axis, that is, as shown in Figure 9, the first end of the stator yoke 3 is located on the inner side of the stator yoke body, and the second end of the stator yoke 3 is located on the outer side of the stator yoke body. For example, the stator yoke 3 can adopt a stamping winding process, and the winding head end 32 and the tail end 33 can be fixed by resistance welding or other methods. Therefore, compared with the structure of a whole piece of conductor, the stator yoke 3 formed by circumferential winding effectively blocks the eddy current circuit, thereby helping to reduce the eddy current loss of the stator yoke 3. In addition, the process of winding the magnetic core of the axial flux motor is relatively mature, making the manufacturing process of the stator yoke 3 more feasible.

[0183] Therefore, the alpha coil winding can be nested in the stator yoke 3 and placed on the stator tooth 1. When the motor is running, the magnetic flux mainly passes through the iron core along the radial direction of the stator tooth 1 and the axial direction of the stator yoke 3. Therefore, the stator tooth 1 of the axially stacked silicon steel sheets can better block the tooth eddy current circuit to reduce the eddy current loss of the stator tooth 1. In addition, the stator yoke 3 of the circumferentially wound silicon steel sheets can also effectively block the eddy current circuit of the stator yoke 3 to reduce the eddy current loss of the stator yoke 3. The combination of the two can further increase the motor thrust and the total motor loss, which is beneficial to improving the motor operation efficiency.

[0184] In some embodiments, the tooth yoke transition piece 2 is connected to one axial side of the stator yoke 3. As a result, the tooth yoke transition piece 2 can function as a magnetic conductor on the axial side of the stator yoke 3. That is, when the magnetic path is transmitted from the stator tooth 1 to the stator yoke 3, the stator yoke 3 is provided with a multi-layer structure, resulting in an air gap between the stator yoke 3 and the stator tooth 1, thereby weakening the magnetic force transmission path between the stator yoke 3 and the stator tooth 1. By stacking the tooth yoke transition piece 2 and the stator yoke 3 in the axial direction, the influence of this air gap can be eliminated, thereby ensuring the magnetic force transmission path between the stator yoke 3 and the stator tooth 1, and further facilitating the reduction of the influence of the air gap extending along the axial direction of the stator yoke 3 on the magnetic field lines.

[0185] In some embodiments, the tooth yoke transition piece 2 and the stator yoke 3 are axially positioned and matched, that is, a positioning structure is designed between the tooth yoke transition piece 2 and the stator yoke 3 so that the tooth yoke transition piece 2 and the stator yoke 3 are relatively fixed in the axial direction, so that the stator yoke 3 will not detach axially from the tooth yoke transition piece 2.

[0186] Therefore, after the tooth yoke transition piece 2 and the stator yoke 3 are axially positioned, the tooth yoke transition piece 2 is located at one axial end of the stator yoke 3, so that the tooth yoke transition piece 2 can eliminate the air gap between the stator yoke 3 and the stator tooth portion 1, and during the use of the suspension motor, the tooth yoke transition piece 2 will not automatically detach axially relative to the stator yoke 3, thereby ensuring the stability of the assembly of the tooth yoke transition piece 2 and the stator yoke 3, thereby reliably reducing the influence of the air gap formed in the stator yoke 3 on the magnetic field lines.

[0187] In addition, the circumferential positioning of the yoke transition piece 2 and the center hole 11 is coordinated, that is, the yoke transition piece 2 can be circumferentially positioned with the stator tooth portion 1 in the center hole 11 through a positioning structure, so that the stator tooth portion 1 and the yoke transition piece 2 are relatively fixed in the circumferential direction, avoiding relative movement of the stator tooth portion 1 and the yoke transition piece 2 along the circumferential direction, thereby ensuring the stability of the suspension motor.

[0188] As shown in Figures 17 to 19, the effects of the technical features of some embodiments of the present disclosure and the related art can be compared and analyzed. Figure 17 is a diagram showing the relationship between the magnetic resistance and time of the stator core of some embodiments of the present disclosure in the related art. Line A is the related art, and line B is the present disclosure. It can be seen that compared with the related art, the magnetic resistance of the present disclosure is reduced. Figure 18 is a diagram showing the relationship between the thrust and time of the linear motor of some embodiments of the present disclosure in the related art. Line D is the related art, and line C is the present disclosure. It can be seen that compared with the related art, the thrust of the present disclosure is increased. Figure 19 is a simulation diagram of the magnetic lines of force corresponding to two stator tooth crowns in some embodiments of the present disclosure in the related art. Line E is the related art, and line F is the present disclosure. It can be seen that compared with the related art, the peak value of the magnetic group force of the present disclosure is reduced.

[0189] As shown in FIG. 20 and FIG. 21 , some embodiments of the present disclosure further provide a stator assembly 1000 .

[0190] According to some embodiments of the present disclosure, the stator assembly 1000 includes a stator core 100 and a stator winding 200 . The stator core 100 is the stator core 100 of the above embodiment. The stator winding 200 is placed on the stator teeth 1 and is externally mounted on the stator yoke 3 .

[0191] As a result, the stator teeth 1 can support the stator winding 200 , and the stator yoke 3 can limit the stator winding 200 , thereby enhancing the structural stability of the stator winding 200 .

[0192] In addition, the stator winding 200 can fully utilize the space between the stator teeth 1 and the stator yoke 3, thereby improving space utilization, thereby reducing the overall structural size of the stator assembly 1000, and facilitating the miniaturization design of the stator assembly 1000.

[0193] In some embodiments, when the levitation motor is operating, the magnetic lines of force extend primarily radially within the stator tooth 1 and axially within the stator yoke 3. The axially stacked first laminations 15 of the stator tooth 1 can significantly reduce eddy current losses generated within the stator tooth 1. The circumferentially wound windings act as an equivalent to the axially stacked first laminations 15 in reducing eddy current losses in the stator tooth 1, and can significantly reduce eddy current losses in the stator yoke 3.

[0194] According to the stator assembly 1000 of some embodiments of the present disclosure, the stator tooth portion 1 is composed of a plurality of first laminations 15 stacked axially to reduce the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or stacked member to reduce the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly reduced, thereby improving the thrust and efficiency of the levitation motor.

[0195] Moreover, by providing the tooth yoke transition piece 2, not only the connection between the stator yoke 3 and the stator tooth portion 1 can be achieved, but also the air gap between the stator yoke 3 and the stator tooth portion 1 can be eliminated, thereby reducing the influence of the air gap at the connection between the stator tooth portion 1 and the stator yoke 3 on the magnetic field lines, thereby greatly reducing the influence of the air gap formed in the motor on the magnetic field lines, which is beneficial to improving the motor thrust and increasing the motor operating efficiency.

[0196] As shown in FIG. 22 , some embodiments of the present disclosure further provide a stator assembly 2000 .

[0197] According to some embodiments of the present disclosure, the stator assembly 2000 includes the stator component 1000 described in the above embodiments. The stator assembly 2000 includes multiple stator components 1000, and the multiple stator components 1000 are stacked in the axial direction and can be driven by power.

[0198] In this stator assembly, the stator teeth 1 are composed of multiple first laminations 15 stacked axially to reduce the eddy current loss of the stator teeth 1. The stator yoke 3 is formed as a winding or stacked part to reduce the eddy current loss of the stator yoke 3. In this way, the eddy current loss of the stator core 100 can be greatly reduced, thereby improving the thrust and efficiency of the levitation motor.

[0199] Moreover, by providing the tooth yoke transition piece 2, not only can the connection between the stator yoke 3 and the stator tooth portion 1 be realized, but also the air gap at the connection between the stator yoke 3 and the stator tooth portion 1 can be eliminated, and the influence of the air gap at the connection between the stator tooth portion 1 and the stator yoke 3 on the magnetic field lines can be reduced, thereby greatly reducing the influence of the air gap formed in the motor on the magnetic field lines, which is beneficial to improving the motor thrust and increasing the motor operating efficiency.

[0200] In some embodiments, the stator assembly further includes a connecting rod, on which the stator cores of the multiple stator assemblies 1000 are mounted, thereby connecting the multiple stator assemblies 1000 together as a single unit. The stator cores 100 of the stator assemblies 1000 can form an interference fit with the connecting rod, facilitating the integrated installation of the stator assembly, reducing the number of installation steps, and improving installation efficiency. Furthermore, the multiple stator assemblies 1000 all possess a strong magnetic field, which helps improve the operating performance of the stator assembly.

[0201] In some embodiments, the connecting rod passes through the stator core 100, and the tooth yoke transition piece 2 is provided with a positioning portion 25 that limits the circumference of the connecting rod (as shown in Figure 16). The positioning portion 25 can be constructed as a positioning boss, and the positioning boss can be set to protrude from the inner circumferential wall of the tooth yoke transition piece 2, so that when the connecting rod is passed through the tooth yoke transition piece 2, the connecting rod and the yoke transition piece 2 can be positioned and pressed by the positioning boss, thereby preventing the stator core 100 from rotating relative to the connecting rod, thereby ensuring the stability of the stator assembly.

[0202] For example, the positioning boss can be constructed in an arc shape, and a positioning groove can be provided on the outer peripheral wall of the connecting rod, so that the positioning boss can extend into the positioning groove for positioning and fitting, thereby achieving circumferential fixation.

[0203] As shown in FIG. 23 , some embodiments of the present disclosure further provide a suspension motor 3000 .

[0204] According to some embodiments of the present disclosure, a levitation motor 3000 includes: a stator assembly 2000 and a mover assembly. The stator assembly is the stator assembly 2000 of the above-described embodiment, and the mover assembly moves in conjunction with the stator assembly. For example, the levitation motor is a linear motor. According to some embodiments of the levitation motor of the present disclosure, the stator teeth 1 of the stator assembly are composed of a plurality of first laminations 15 stacked axially to reduce eddy current losses in the stator teeth 1. The stator yoke 3 is formed as a wound or stacked member to reduce eddy current losses in the stator yoke 3. In this way, the eddy current losses of the stator core 100 can be significantly reduced, reducing the impact of the air gap formed in the motor on the magnetic field lines, thereby improving the thrust of the motor and increasing the operating efficiency of the motor.

[0205] As shown in FIG24 , some embodiments of the present disclosure further provide a suspension system 4000 , comprising the suspension motor 3000 of the above embodiment, wherein one of the stator assembly and the mover assembly is suitable for connection to a vehicle body, and the other of the stator assembly and the mover assembly is suitable for connection to a wheel.

[0206] In this way, the suspension motor can be used to transmit the force and torque acting between the wheels and the vehicle body, and to cushion the impact force transmitted to the vehicle body by the uneven road surface, thereby playing a vibration reduction role to ensure that the vehicle can run smoothly.

[0207] According to the suspension system 4000 of some embodiments of the present disclosure, the stator tooth portion 1 of the stator assembly is composed of a plurality of first laminations 15 stacked axially to facilitate weakening the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or stacked member to facilitate weakening the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly weakened, thereby improving the thrust and efficiency of the suspension motor, reducing the influence of the air gap formed in the motor on the magnetic field lines, and facilitating improving the thrust of the motor and increasing the operating efficiency of the motor.

[0208] As shown in FIG. 25 , the present disclosure further provides a vehicle 5000 including the suspension system 4000 of the above embodiment.

[0209] According to some embodiments of the vehicle 5000 disclosed herein, the stator tooth portion 1 of the stator assembly is composed of a plurality of first laminations 15 stacked axially to facilitate weakening the eddy current loss of the stator tooth portion 1, and the stator yoke portion 3 is formed as a winding or stacked member to facilitate weakening the eddy current loss of the stator yoke portion 3. In this way, the eddy current loss of the stator core 100 can be greatly weakened, thereby improving the thrust and efficiency of the suspension motor, reducing the influence of the air gap formed in the motor on the magnetic field lines, and facilitating improving the thrust of the motor and increasing the operating efficiency of the motor.

[0210] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present disclosure.

[0211] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the present disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0212] In this disclosure, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0213] In the present disclosure, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0214] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0215] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator core, comprising: stator teeth; a stator yoke, wherein the stator yoke is connected to the stator teeth, and at least one of the stator yoke and the stator teeth is a multi-layer structure; as well as A tooth yoke transition piece is connected to the stator yoke portion and the stator teeth portion respectively, so that the stator yoke portion and the stator teeth portion are connected.

2. The stator core according to claim 1, wherein: The tooth yoke transition piece is located on a magnetic path from the stator teeth to the stator yoke.

3. The stator core according to claim 1 or 2, satisfying at least one of the following: The stator teeth are of a multi-layer structure, and the radial projections of the yoke transition piece and the stator teeth at least partially overlap; or The stator yoke is a multi-layer structure, and the axial projections of the gear yoke transition piece and the stator yoke at least partially overlap.

4. The stator core according to claim 3, wherein: The gear yoke transition piece is connected to the radial inner side of the stator tooth portion.

5. The stator core according to claim 3 or 4, wherein: An axial extension dimension of the yoke transition piece is greater than or equal to an axial extension dimension of the stator tooth portion.

6. The stator core according to any one of claims 3 to 5, wherein: A side surface of the tooth yoke transition piece away from the stator yoke portion is flush with a side surface of the stator tooth portion. In the axial direction, a side surface of the tooth yoke transition piece close to the stator yoke portion is located between the stator tooth portion and the stator yoke portion.

7. The stator core according to any one of claims 3 to 6, wherein: The gear yoke transition piece is made of magnetic conductive material.

8. The stator core according to any one of claims 3 to 7, wherein: The gear yoke transition piece is an integral piece.

9. The stator core according to any one of claims 3 to 8, wherein: The tooth yoke transition piece is a multi-layer structure, the stator tooth portion is a multi-layer structure, and the number of layers of the tooth yoke transition piece is smaller than the number of layers of the stator tooth portion.

10. The stator core according to any one of claims 3 to 9, wherein: The stator teeth include a plurality of first laminations stacked together.

11. The stator core according to any one of claims 3 to 10, wherein: The stator yoke is a wound part.

12. The stator core according to any one of claims 3 to 11, wherein: The gear yoke transition piece is connected to one axial side of the stator yoke part.

13. The stator core according to any one of claims 1 to 12, wherein: The tooth yoke transition piece and the stator tooth portion are connected via a first matching structure and a second matching structure.

14. The stator core according to claim 13, wherein: One of the first mating structure and the second mating structure is a first positioning protrusion, and the other of the first mating structure and the second mating structure is a first positioning groove. The first positioning protrusion and the first positioning groove are plugged into each other to limit the circumferential position of the stator tooth portion.

15. The stator core according to claim 14, wherein: In the circumferential direction of the stator tooth portion, opposite side walls of the first positioning groove extend obliquely toward each other in a direction toward the center of the stator tooth portion, and the first positioning protrusion and the first positioning groove are engaged with each other.

16. The stator core according to claim 14 or 15, wherein: The first positioning protrusion is provided on the outer peripheral wall of the gear yoke transition piece, and the first positioning groove is located in the stator tooth portion and is recessed outward from the inner wall of the stator tooth portion.

17. The stator core according to claim 13, wherein: One of the first matching structure and the second matching structure is a guiding protrusion, and the other of the first matching structure and the second matching structure is a guiding groove, and the guiding protrusion and the guiding groove match each other.

18. The stator core according to claim 17, wherein: The outer peripheral wall of the guide protrusion is formed into an arc-shaped surface, and the guide groove is formed into an arc-shaped groove.

19. The stator core according to claim 17 or 18, wherein: The guide groove is provided on the outer peripheral wall of the gear yoke transition piece, and the guide protrusion is located on the stator tooth portion and protrudes inward from the inner wall of the stator tooth portion.

20. The stator core according to any one of claims 1 to 19, wherein: In the axial direction of the stator core, a first plug-in portion is provided at the end of the tooth yoke transition piece, and a second plug-in portion is provided at the end of the stator yoke portion, and the first plug-in portion and the second plug-in portion are plug-fitted.

21. The stator core according to claim 20, wherein: The first plug-in portion includes a plurality of first plug-in protrusions protruding along the axial direction, and the second plug-in portion includes a plurality of first plug-in grooves. The plurality of first plug-in protrusions and the plurality of first plug-in grooves are plug-fitted with each other respectively.

22. The stator core according to any one of claims 1 to 21, wherein: The gear yoke transition piece is provided with at least one slit.

23. The stator core according to claim 22, wherein: The at least one slit includes a plurality of slits, and the plurality of slits are arranged at intervals in the circumferential direction of the gear yoke transition piece.

24. The stator core according to any one of claims 1 to 23, further comprising a stator tooth crown, wherein the stator tooth crown is arranged radially outside the stator tooth portion, and in the axial direction of the stator core, at least one axial end portion of the stator tooth crown protrudes from the axial end face of the stator tooth portion.

25. The stator core according to claim 24, wherein: The stator crown includes a plurality of second laminations stacked along the axial direction of the stator core.

26. The stator core according to claim 24 or 25, wherein: In the circumferential direction of the stator core, the stator tooth crown includes a plurality of sub-crown portions spaced apart along the circumferential direction, and a wire passing slot of the stator tooth crown is defined by two adjacent sub-crown portions among the plurality of sub-crown portions.

27. The stator core according to claim 24 or 25, wherein: The stator tooth crown is formed as an annular integral piece, and a plurality of wire passing grooves are provided on the outer peripheral wall of the stator tooth crown.

28. The stator core according to claim 27, wherein: A portion of the stator tooth crown is bent inward to define a bent portion provided with the wire passing groove. A second positioning groove is provided on the peripheral wall of the stator tooth portion, and the bent portion is located in the second positioning groove.

29. The stator core according to claim 27 or 28, wherein: The stator tooth crown includes a circumferential side wall and a plurality of axial end faces, and a transition chamfer is provided between the circumferential side wall and at least one of the plurality of axial end faces.

30. A stator core, comprising: a stator tooth portion, wherein a radial magnetic path is formed on the stator tooth portion; a stator yoke, wherein an axial magnetic path is formed on the stator yoke; as well as A tooth yoke transition piece, wherein a connecting magnetic path is formed on the tooth yoke transition piece, the magnetic path of the stator core includes the radial magnetic path, the axial magnetic path and the connecting magnetic path, and the connecting magnetic path is used to connect the radial magnetic path and the axial magnetic path.

31. The stator core according to claim 30, wherein: The tooth yoke transition piece is located on a magnetic path from the stator teeth to the stator yoke.

32. The stator core according to claim 30 or 31, satisfying at least one of the following: The stator teeth are of a multi-layer structure, and the radial projections of the yoke transition piece and the stator teeth at least partially overlap; or The stator yoke is a multi-layer structure, and the axial projections of the gear yoke transition piece and the stator yoke at least partially overlap.

33. The stator core according to claim 32, wherein: The gear yoke transition piece is connected to the radial inner side of the stator tooth portion.

34. The stator core according to claim 32 or 33, wherein: An axial extension dimension of the yoke transition piece is greater than or equal to an axial extension dimension of the stator tooth portion.

35. The stator core according to any one of claims 32 to 34, wherein: A side surface of the tooth yoke transition piece away from the stator yoke portion is flush with a side surface of the stator tooth portion. In the axial direction, a side surface of the tooth yoke transition piece close to the stator yoke portion is located between the stator tooth portion and the stator yoke portion.

36. The stator core according to any one of claims 32 to 35, wherein: The gear yoke transition piece is made of magnetic conductive material.

37. The stator core according to any one of claims 32 to 36, wherein: The gear yoke transition piece is an integral piece.

38. The stator core according to any one of claims 32 to 37, wherein: The tooth yoke transition piece is a multi-layer structure, the stator tooth portion is a multi-layer structure, and the number of layers of the tooth yoke transition piece is smaller than the number of layers of the stator tooth portion.

39. The stator core according to any one of claims 32 to 38, wherein: The stator teeth include a plurality of first laminations stacked together.

40. The stator core according to any one of claims 32 to 39, wherein: The stator yoke is a wound part.

41. The stator core according to any one of claims 32 to 40, wherein: The gear yoke transition piece is connected to one axial side of the stator yoke part.

42. A stator assembly comprising: A stator core, wherein the stator core is a stator core according to any one of claims 1 to 29 or any one of claims 30 to 41; as well as The stator winding is placed on the stator teeth and is externally mounted on the stator yoke.

43. A stator assembly comprising a plurality of stator assemblies, wherein any one of the plurality of stator assemblies is the stator assembly according to claim 42, and the plurality of stator assemblies are stacked in an axial direction.

44. The stator assembly according to claim 43, further comprising a connecting rod, wherein the stator cores of the plurality of stator assemblies are disposed on the connecting rod.

45. The stator assembly according to claim 43, wherein: The connecting rod passes through the stator core, and the tooth yoke transition piece is provided with a positioning portion that limits the circumferential position of the connecting rod.

46. ​​A suspension motor comprising: A stator assembly, wherein the stator assembly is a stator assembly according to any one of claims 43 to 45; as well as A mover assembly is movably matched with the stator assembly.

47. A suspension system comprising the levitation motor according to claim 46, wherein one of the stator assembly and the mover assembly is adapted to be connected to a vehicle body, and the other of the stator assembly and the mover assembly is adapted to be connected to a wheel.

48. A vehicle comprising a suspension system according to claim 47.

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