Motor winding, stator, motor and winding method

Abstract

This invention discloses a motor winding, stator, motor, and winding method, relating to the field of motors. The winding method includes winding conductors into coils to form a winding; each coil group includes two axial groups, a first slot-crossing group, and a second slot-crossing group. The two axial groups include axial segments; the first slot-crossing group is connected to one axial end of the axial group; the second slot-crossing group is connected to the other axial end of the axial group, wherein in at least one axial group, all axial segments extend along the axial direction of the motor, are located on the same arc, and are arranged sequentially circumferentially. This winding method effectively improves the reliability of the motor winding by reducing intermediate joints.

Description

Technical Field

[0001] This invention relates to the field of electric motors, and more specifically to an electric motor winding, stator, motor, and winding method. Background Technology

[0002] In some existing hollow cup motor winding designs, the winding includes multi-slot winding coils, each with a power lead, and non-adjacent winding coils are connected via cross-slot windings. This structure requires soldering of the intermediate wire ends, which can easily lead to problems such as solder splattering and wire damage, resulting in reduced connection reliability. At the same time, the soldering process increases complexity, affecting production efficiency and product consistency. Furthermore, the multi-slot winding design may lead to uneven electromagnetic field distribution, increasing eddy current losses and thus limiting further improvements in motor performance.

[0003] Therefore, a new winding method is urgently needed to improve the reliability of motor windings. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, a first aspect of the present invention aims to provide a winding method that effectively improves the reliability of motor windings by reducing intermediate joints.

[0005] The second aspect of the present invention is to provide a motor winding using the above-described winding method.

[0006] The third aspect of the present invention aims to provide a stator using the aforementioned winding method.

[0007] The fourth aspect of the present invention is to provide a motor having the aforementioned motor windings or having the aforementioned stator.

[0008] According to a first aspect of the present invention, a winding method includes: winding a conductor into at least one coil to form a winding group, each group of said coils including: two axial groups, a first slot group and a second slot group, the two axial groups being arranged circumferentially along the motor, each axial group including at least two axial segments; the first slot group being connected to one axial end of the two axial groups; the second slot group being connected to the other axial end of the two axial groups; wherein, in at least one axial group, all said axial segments extend axially along the motor and are located on the same arc, and are arranged sequentially circumferentially.

[0009] According to the winding method of the first aspect of the present invention, by winding a conductor into at least one coil to form a winding, the number of intermediate joints is reduced and the continuity of the current path is improved. By setting two axial groups in each coil group, and by arranging all axial segments along the axial direction of the motor and on the same arc, and sequentially arranged circumferentially, a symmetrical and uniform magnetic field distribution is achieved, improving the smoothness and efficiency of motor operation. By setting a first slot group and a second slot group, the current path is improved, ensuring the stability and reliability of current transmission. This design not only reduces complex wiring and welding steps, simplifies the production process, improves production efficiency, and reduces manufacturing costs, but also enhances the overall performance and service life of the motor.

[0010] According to some embodiments of the winding method of the present invention, the axial segments of all the axial groups are arranged to extend along the axial direction of the motor and are located on the same arc.

[0011] In some alternative embodiments, within the same axial group, each pair of adjacent axial segments are arranged closely together circumferentially or at equal intervals.

[0012] Further optionally, there are at least two coils, all of which are arranged at circumferential intervals along the motor, and each pair of coils are connected by a connecting wire.

[0013] In some specific embodiments, from the beginning of the wire to the end of the wire, the conductor is wound with multiple coils in sequence along the first circumferential direction, and after each coil is wound, a connecting wire is wound before the next coil is wound.

[0014] More specifically, the first slot group, the wire head, and the wire tail are located at one axial end of the winding, and the second slot group and the connecting wire are located at the other axial end of the winding.

[0015] Optionally, the first cross-slot group and the connecting line both extend out along the first circumferential direction; the second cross-slot group extends out along a second circumferential direction opposite to the first circumferential direction.

[0016] In some optional embodiments, each first slot group includes at least two first slot segments, and each second slot group includes at least two second slot segments; an axial segment of one axial group, a first slot segment of the first slot group, an axial segment of another axial group, and a second slot segment of the second slot group are sequentially connected to form a loop; all the loops of the coil are wound sequentially from the inside to the outside along the radial direction of the loop.

[0017] In some alternative embodiments, the motor windings are at least two phases, and the winding method for each phase is the same.

[0018] According to some embodiments of the winding method of the present invention, the axial segments of the windings of different phases are located on an arc of the same radius.

[0019] According to a second aspect embodiment of the present invention, the motor winding is wound using the winding method of the motor winding described in the first aspect embodiment of the present invention.

[0020] According to a third aspect of the present invention, a stator includes a stator core and a stator winding wound on the stator core, wherein the stator winding is wound using the winding method for motor windings described in the first aspect of the present invention.

[0021] The motor according to a fourth aspect embodiment of the present invention includes the motor windings of the second aspect embodiment of the present invention, or includes the stator according to the third aspect embodiment of the present invention.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a side view of the motor winding in some embodiments of the present invention;

[0025] Figure 2 This is a top view of the motor windings in some embodiments of the present invention;

[0026] Figure 3 This is a perspective view of the wires after winding in some embodiments of the present invention;

[0027] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of some coils in some embodiments of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the first cross-slot group in some embodiments of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of some coils in some embodiments of the present invention;

[0031] Figure 8 This is a side view of the U-phase winding in some embodiments of the present invention;

[0032] Figure 9 This is a top view of the U-phase winding in some embodiments of the present invention;

[0033] Figure 10 This is a side view of the V-phase winding in some embodiments of the present invention;

[0034] Figure 11 This is a top view of the V-phase winding in some embodiments of the present invention;

[0035] Figure 12 This is a side view of the W-phase winding in some embodiments of the present invention;

[0036] Figure 13 This is a top view of the W-phase winding in some embodiments of the present invention;

[0037] Figure 14 This is a schematic diagram of the stator structure in some embodiments of the present invention;

[0038] Figure 15 This is a side view of the stator in some embodiments of the present invention;

[0039] Figure 16 This is a top view of the stator in some embodiments of the present invention.

[0040] Figure label:

[0041] Stator 10000

[0042] Motor winding 1000

[0043] Wire 100

[0044] 10 thread ends

[0045] Coil 30, wire loop 31, axial group 32, axial segment 321, first slot group 34, first slot segment 341, second slot group 36, second slot segment 361.

[0046] Connecting cable 40

[0047] Line tail 50,

[0048] Three-phase winding 200, U-phase winding 201, V-phase winding 202, W-phase winding 203.

[0049] Stator core 2000. Detailed Implementation

[0050] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0051] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] The following is for reference. Figures 1-16 A winding method for a motor winding 1000 according to an embodiment of the present invention is described.

[0054] like Figures 1-3 As shown, the conductor 100 is wound into at least one coil 30 to form a winding.

[0055] This winding method ensures a smooth current path while reducing the number of joints, lowering contact resistance, and improving the reliability of the motor winding 1000. Furthermore, reducing the number of joints simplifies the manufacturing process and increases production efficiency.

[0056] Further optional, refer to Figures 3-5 Each coil 30 includes a multi-turn loop 31. The multi-turn loop 31 increases the number of turns in the winding, which in turn enhances the electromagnetic field strength and reduces flux leakage and losses. Secondly, the multi-turn loop 31 makes the current distribution more uniform, reducing the risk of localized overheating and improving operational stability. Furthermore, by increasing the number of turns, it helps to meet the demands of higher loads while distributing current pressure, reducing heat generation, and extending motor life.

[0057] Each group of coils 30 includes: two axial groups 32, a first slot group 34, and a second slot group 36. The two axial groups 32 are arranged circumferentially along the motor, and each axial group 32 includes at least two axial segments 321. This helps to form a compact and efficient winding layout.

[0058] Specifically, the two axial groups 32 are arranged sequentially along the circumference of the motor, and each axial group 32 includes at least two axial segments 321, where the motor's axis is parallel to the circumference of the motor. Figures 3-5 The first circumference shown is in the same direction.

[0059] Here, the axial segments 321 are arranged sequentially along the circumference so that the magnetic field generated by each axial segment 321 is in the same direction. Therefore, the magnetic fields between each axial segment 321 can be superimposed to form a stronger overall magnetic field, which helps to improve the torque output, operating efficiency and power density of the motor, while reducing energy loss and improving motor performance.

[0060] Further optional, such as Figure 4 and Figure 5 As shown, the axial segments 321 in each axial group 32 are arranged parallel to each other in the axial direction and do not intersect. It is known that the motor winding 1000 is usually wound around the outside of the stator core and located between the motor stator 10000 and the rotor. By arranging the axial segments 321 in parallel, crossing is reduced, and uneven distribution and local protrusion of the motor winding 1000 are avoided, preventing interference with the normal rotation of the rotor. This reduces operating noise and vibration, improves motor efficiency and stability, and also helps to extend the service life of the motor.

[0061] Furthermore, the parallel axial segments 321 ensure a more uniform current distribution in the motor windings 1000, effectively preventing excessively strong or weak local magnetic fields caused by crossing or overlapping. This uniform current distribution generates a more stable and symmetrical magnetic field, thereby improving motor operating efficiency, reducing energy loss, and optimizing motor performance.

[0062] See Figure 4 and Figure 5 The first cross-slot group 34 is connected to one axial end of the two axial groups 32. The second cross-slot group 36 is connected to the other axial end of the two axial groups 32. In at least one axial group 32, all axial segments 321 extend along the axial direction of the motor, are located on the same arc, and are arranged sequentially in the circumferential direction.

[0063] In this embodiment of the invention, the first slot group 34 and the second slot group 36 are respectively disposed at both ends of the two axial groups 32, and are connected sequentially to the slot group 36 by the axial line segment 321 to form a loop 31. This design enables the same coil 30 to form a continuous and stable current path after winding, greatly reducing or even avoiding the generation of additional connection points, thereby ensuring the stability of current transmission.

[0064] It is worth noting that in some traditional winding structures, different groups of coils 30 are usually connected by soldering lead wires 10. However, the present invention uses the same conductor 100 to continuously wind out the axial segment 321, the first cross-slot group 34, and the second cross-slot group 36. The direct connection between the first cross-slot group 34 and the second cross-slot group 36 greatly reduces the number of joints required between the axial groups 32, thereby largely eliminating the need for solder. This not only prevents voltage breakdown problems that may result from improper solder joint insulation, but also further improves the safety of the motor.

[0065] In addition, the winding method of this invention reduces welding steps, lowers process equipment costs, and simplifies operation procedures, thereby shortening production time and improving production efficiency. Simultaneously, it increases the utilization rate of the wires by 100%, avoids quality risks associated with welding, such as incomplete soldering and desoldering, ensures the reliability of the motor, and optimizes the overall manufacturing process.

[0066] In summary, the winding method according to the first aspect of the present invention reduces the number of intermediate joints and improves the continuity of the current path by winding at least one coil of wire into a winding. By setting two axial groups in each coil group, and by arranging all axial segments along the axial direction of the motor and on the same arc, and sequentially arranged circumferentially, a symmetrical and uniform magnetic field distribution is achieved, improving the smoothness and efficiency of motor operation. By setting a first slot group and a second slot group, the current path is improved, ensuring the stability and reliability of current transmission. This design not only reduces complex wiring and welding steps, simplifies the production process, improves production efficiency, and reduces manufacturing costs, but also enhances the overall performance and service life of the motor.

[0067] Furthermore, according to some optional embodiments of the present invention, the axial segments 321 of all axial groups 32 are arranged to extend along the axial direction of the motor and are located on the same arc.

[0068] This design ensures a high degree of consistency in the spatial layout of the axial segments 321, making the winding structure more compact and regular. By arranging the axial segments 321 on the same arc, not only is the space utilization of the winding optimized, but mutual interference between segments is also reduced, thereby improving the uniformity of the electromagnetic field distribution.

[0069] Furthermore, this layout helps enhance the mechanical stability of the motor winding 1000 to some extent, avoiding additional stress and losses caused by misalignment or crossing of wire segments. Simultaneously, the design of the axial segment 321 extending along the motor axis makes the current path smoother, reduces resistance loss, and improves motor operating efficiency.

[0070] According to some optional embodiments of the present invention, see [reference]. Figure 4 and Figure 5 In the same axial group 32, each pair of adjacent axial line segments 321 are arranged closely along the circumference or at equal intervals.

[0071] In some technical solutions, two adjacent axial segments 321 within the same axial group 32 are arranged closely in the circumferential direction. This close arrangement of axial segments 321 helps improve space utilization, increases the density of the motor windings 1000, avoids loose and redundant winding, and improves the utilization rate of the conductors 100.

[0072] In some technical solutions, within the same axial group 32, the uniform circumferential spacing of every two adjacent axial segments 321 ensures a uniform electromagnetic field distribution. This guarantees a uniform current distribution around the stator core 2000 of the motor winding 1000, thereby optimizing the electromagnetic field distribution, reducing harmonic distortion, lowering vibration and noise, and improving the smoothness and efficiency of motor operation.

[0073] According to some optional embodiments of the present invention, combined with Figure 5 and Figure 6 As shown, there are at least two coils 30, and all coils 30 are arranged at intervals along the circumference of the motor. Every two coils 30 are connected by a connecting line 40.

[0074] There are at least two coils 30, evenly spaced along the circumference of the motor. Adjacent coils 30 are connected by connecting wires 40 to form a continuous current path, ensuring uniform current distribution and optimizing magnetic field consistency. Simultaneously, the uniform magnetic field distribution improves motor operating stability, reduces vibration, extends service life, and increases energy conversion efficiency, achieving smoother and more efficient operation.

[0075] In some alternative embodiments, the length of the connecting line 40 can be adjusted according to the actual span between adjacent coils 30, and no specific limitation is made in this invention.

[0076] In some specific embodiments, refer to Figure 3 and Figure 7 From the beginning of the wire 10 to the end of the wire 50, the conductor 100 winds out multiple coils 30 in the first circumferential direction, and after each coil 30 is wound out, a connecting wire 40 is wound out before the next coil 30 is wound out.

[0077] Specifically, the winding method is as follows: First, wind the first coil 30. After the first coil 30 is completed, continue winding a connecting wire 40 to connect to the next coil 30. Then, along the same circumferential direction, start winding the next coil 30 based on the connecting wire 40. Repeat this process until the last coil 30 is completed and finally the end of the wire 50 is reached.

[0078] Firstly, this method of winding the coils 30 one by one ensures continuity and stability. By connecting each coil 30 in series with the connecting wire 40, the continuity and stability of the current path are ensured, avoiding problems such as open circuits or poor contact.

[0079] Individual winding reduces complex one-time winding operations, making it easier to control the quality and precision of each coil 30. Winding along a fixed circumferential direction makes the coils 30 more regularly arranged, improving the feasibility and efficiency of automated production.

[0080] Further optional, such as Figure 3 As shown, the first slot group 34, the wire head 10 and the wire tail 50 are located at one end of the winding axis, and the second slot group 36 and the connecting wire 40 are located at the other end of the winding axis.

[0081] The lead wire 10, tail wire 50, and connecting wire 40 are respectively located at both ends, allowing for the rational arrangement of components with different functions at both axial ends of the winding. For example, the lead wire 10 and tail wire 50 are concentrated at the same end, facilitating connection with other components and reducing interference with the connecting wire 40. This also achieves clear division of functional areas, making installation, maintenance, and troubleshooting more convenient and efficient. Furthermore, this separate layout effectively reduces spatial interference between the lead wire and the connecting wire 40, avoiding unnecessary electromagnetic coupling and ensuring the stability of current transmission. Optimized layout helps generate a more uniform and stable magnetic field, thereby improving magnetic field quality, reducing vibration and noise during motor operation, and enhancing motor reliability.

[0082] In some such Figure 5 In the specific embodiment shown, the first cross-slot group 34 and the connecting line 40 both extend outward along the first circumferential direction. The second cross-slot group 36 extends outward along the second circumferential direction, which is opposite to the first circumferential direction.

[0083] The first slot group 34 and the second slot group 36 are wound in opposite directions, forming a symmetrical winding path. On one hand, this path can construct a complete current loop, ensuring normal motor operation; on the other hand, the symmetrical winding method simplifies the winding production process. Because the winding path is clear and regular, complex wiring and welding processes can be significantly reduced, lowering the quality risk caused by poor welding, while increasing the possibility of automated production and reducing manual intervention. Furthermore, this design also improves the utilization rate of the conductors to some extent, reducing material costs.

[0084] According to some embodiments of the present invention, each first slot group 34 includes at least two first slot segments 341, and each second slot group 36 includes at least two second slot segments 361. An axial segment 321 of an axial group 32, a first slot segment 341 of a first slot group 34, an axial segment 321 of another axial group 32, and a second slot segment 361 of a second slot group 36 are sequentially connected to form a loop 31.

[0085] The above winding method can form a complete loop 31.

[0086] Specifically, each first slot group 34 includes at least two first slot segments 341, while each second slot group 36 includes at least two second slot segments 361. During construction, an axial segment 321 of an axial group 32 is first selected as the starting point and then connected to a first slot segment 341 of the first slot group 34. Subsequently, this line continues to extend through an axial segment 321 of another axial group 32 and finally connects to a second slot segment 361 of the second slot group 36, forming a complete loop 31. This design places the first slot group 34 and the second slot group 36 at opposite ends of the two axial groups 32, and connects them sequentially to the slot segments via axial segments 321.

[0087] The aforementioned winding method simplifies the circuit structure to some extent, reduces the number of additional connection points, and avoids current transmission problems that may be caused by poor contact. By ensuring that the current can flow along a smooth and continuous path, the stability and efficiency of current transmission are improved.

[0088] Reference Figure 4 and Figure 5 All the loops 31 of the coil 30 are wound sequentially from the inside to the outside along the radial direction of the loops 31.

[0089] In the winding method described above, all the loops 31 of the coil 30 are wound radially from the inside out, that is, starting from the position near the center and expanding outward layer by layer. This layered winding method ensures the compactness and regularity of the coil 30, optimizes space utilization, reduces the crossing and interference between the loops 31, ensures the continuity of the current path and the uniformity of the magnetic field distribution, thereby helping to enhance the performance of the motor.

[0090] Furthermore, sequential winding facilitates automated operation and helps improve production efficiency.

[0091] Depending on some optional winding methods, such as Figure 1 and Figure 2 As shown, the motor windings consist of at least two phases, and the winding method for each phase is the same.

[0092] Alternatively, the windings can be two-phase, three-phase, or four-phase, etc.

[0093] In some specific embodiments, such as Figure 1 and Figure 2 As shown, the motor has three-phase windings 200. The winding methods of the three-phase windings 200 are the same, and the included angle between different phase windings is 60 degrees.

[0094] Here, the motor adopts a three-phase winding structure of 200, with each phase winding using the same winding method, but the windings of different phases are distributed at a 60-degree angle. This winding method ensures a balanced distribution of the electromagnetic field within the stator 10000 by evenly distributing the positions of the three-phase windings 200, thus effectively avoiding rotor rotation deviation problems that may be caused by uneven electromagnetic field distribution. It is known that if the electromagnetic field distribution is uneven, the rotor will be subjected to unbalanced electromagnetic forces during rotation, which may cause vibration, noise, and mechanical resonance, and even increase friction and wear between the rotor and the stator 10000, reducing the motor's lifespan. Here, the three-phase windings 200 use the same winding method to ensure consistency in structure and electrical performance of each phase winding, simplifying the manufacturing process and improving product reliability. The 60-degree angle arrangement allows the magnetic fields generated by the three-phase currents to superimpose, forming a rotating magnetic field, ensuring normal motor operation.

[0095] Specifically, the three-phase winding 200 includes a U-phase winding 201, a V-phase winding 202, and a W-phase winding 203.

[0096] in, Figures 8-9 This is a schematic diagram of the U-phase winding 201. Figures 10-11 This is a schematic diagram of the V-phase winding 202. Figures 12-13 This is a schematic diagram of the W-phase winding 203.

[0097] First, the W-phase winding 203 is wound as follows: the conductor 100 is wound to form multiple sets of coils 30, each set of coils 30 containing multiple loops 31, which are wound radially from the inside out multiple times. Furthermore, each set of coils 30 also includes two axial groups 32 extending along the axis and arranged opposite each other, each axial group 32 containing multiple longitudinal segments arranged closely in the circumferential direction. After completing the W-phase winding 203, the winding methods for the V-phase winding 202 and the U-phase winding 201 are the same as those for the W-phase winding 203, and will not be described again here.

[0098] Further optional, see Figure 2 The axial segments 321 of different phase windings are located on the same radius of the arc.

[0099] Axial segment 321 maintains the same radial position in the circumferential direction of the stator core 2000, forming a common circular distribution. The spatial distribution of the motor windings 1000 is compact and uniform, which helps to improve the uniformity of the magnetic field distribution, thereby improving the stability of motor operation. At the same time, it avoids unnecessary energy damage and reduces vibration and noise generated during use.

[0100] According to a second aspect embodiment of the present invention, the motor winding 1000 is wound using the winding method of the motor winding 1000 of the first aspect embodiment of the present invention.

[0101] By using an improved winding method to wind the motor winding 1000, the risk of solder blasting is reduced by decreasing the number of joints in the winding structure, thereby improving the reliability of the motor winding 1000. At the same time, the optimized motor winding 1000 also improves the uniformity of the electromagnetic field to a certain extent, thereby enhancing the motor performance.

[0102] According to the third aspect embodiment of the present invention, the stator 10000, such as Figures 14-16 As shown, it includes: a stator core 2000 and a stator winding wound on the stator core 2000. The stator winding is wound using the winding method of the motor winding 1000 in the first aspect of the present invention.

[0103] Here, the stator core 2000 is a toroidal component. The toroidal structure ensures a more uniform magnetic field distribution in the stator windings wound around it, avoiding magnetic reluctance fluctuations and vibration noise that may occur with traditional slotted structures. Secondly, this design helps optimize the spatial layout of the windings, allowing for a more compact arrangement of the conductors 100 and improving space utilization. Furthermore, the combination of the toroidal core and the windings simplifies the manufacturing process and facilitates automated production.

[0104] Optionally, the stator 10000 also includes an insulating frame disposed on the stator core 2000. The insulating frame is used to support the stator windings. The insulating frame is used to ensure electrical isolation and achieve structural stability of the stator windings.

[0105] Optionally, the stator winding includes at least one phase winding. This means that the number of windings in the stator winding is very flexible, and can be a single-phase winding, a two-phase winding, or a three-phase winding, etc. The specific number can be adjusted according to actual needs, and the present invention does not impose specific limitations.

[0106] In some alternative embodiments, refer to Figure 16 The stator 10000 includes a stator core 2000, an insulating frame, and a three-phase stator winding wound on the insulating frame.

[0107] The motor according to a fourth aspect embodiment of the present invention includes the motor winding 1000 according to the second aspect embodiment of the present invention, or includes the stator 10000 according to the third aspect embodiment of the present invention.

[0108] By optimizing the winding structure, the reliability and efficiency of the motor can be improved.

[0109] The following is for reference. Figure 1 - Figure 7 The following describes in detail, with reference to a specific embodiment, a motor winding 1000 wound according to the winding method of an embodiment of the present invention. It is to be understood that the following description is merely illustrative and not a specific limitation of the invention.

[0110] Reference Figure 1 and Figure 2 The motor winding 1000 includes three-phase windings 200. The included angle between the three-phase windings 200 is 60 degrees.

[0111] Reference Figure 3 Each phase winding includes a conductor 100, which comprises a wire start 10, a wire end 50, and multiple sets of coils 30 located between them. The multiple sets of coils 30 are arranged at intervals along a first circumferential direction, and adjacent sets of coils 30 are connected by connecting wires 40. Each set of coils 30 includes multiple loops 31, which are wound sequentially radially. After one set of coils 30 is wound, a section of connecting wire 40 is removed before the next set of coils 30 is wound.

[0112] Reference Figures 4-7 Each coil group 30 includes: two axial groups 32, a first slot group 34, and a second slot group 36. The two axial groups 32 are arranged sequentially along the circumference of the motor, and each axial group 32 includes multiple axial segments 321. The first slot group 34 is located at one axial end of the two axial groups 32, and each first slot group 34 includes multiple first slot segments 341. The second slot group 36 is located at the other axial end of the two axial groups 32, and each second slot group 36 includes multiple second slot segments 361.

[0113] An axial segment 321 of an axial group 32, a first cross-slot segment 341 of a first cross-slot group 34, an axial segment 321 of another axial group 32, and a second cross-slot segment 361 of a second cross-slot group 36 are connected in sequence to form a loop 31.

[0114] In both axial groups 32, all axial segments 321 extend along the axial direction of the motor, are located on the same arc, and are arranged sequentially in the circumferential direction. In the same axial group 32, every two adjacent axial segments 321 are arranged closely in the circumferential direction.

[0115] The first slot group 34, the wire head 10 and the wire tail 50 are located at one end of the winding axis, and the second slot group 36 and the connecting wire 40 are located at the other end of the winding axis.

[0116] Reference Figure 6 The first cross-slot group 34 and the connecting line 40 both extend out along the first circumferential direction; the second cross-slot group 36 extends out along the second circumferential direction, which is opposite to the first circumferential direction.

[0117] Reference Figure 2 The axial segments 321 of different phase windings are located on the same radius of the arc.

[0118] Other configurations of the motor winding 1000 according to embodiments of the present invention, such as the stator 10000 and the motor, as well as their operation, are known to those skilled in the art and will not be described in detail here.

[0119] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0120] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for winding a motor winding, characterized in that, include: At least one coil is wound around a wire to form a winding, each winding comprising: Two axial groups are arranged circumferentially along the motor, and each axial group includes at least two axial segments; The first cross-slot group is connected to one axial end of the two axial groups; The second cross-slot group is connected to the other axial end of the two said axial groups; In at least one of the axial groups, all the axial segments extend along the axial direction of the motor, are located on the same arc, and are arranged sequentially in the circumferential direction.

2. The winding method for a motor winding according to claim 1, characterized in that, All the axial segments of the axial groups are arranged to extend along the axial direction of the motor and are located on the same arc.

3. The winding method for a motor winding according to claim 1, characterized in that, In the same axial group, each pair of adjacent axial segments are arranged closely together circumferentially or at equal intervals.

4. The method for winding a motor winding according to any one of claims 1-3, characterized in that, The coils are at least two in number, and all the coils are arranged at intervals along the circumference of the motor, with each pair of coils connected by a connecting wire.

5. The winding method for a motor winding according to claim 4, characterized in that, From the beginning to the end of the wire, the conductor is wound with multiple coils in sequence along the first circumferential direction, and after each coil is wound, a connecting wire is wound before the next coil is wound.

6. The winding method for a motor winding according to claim 5, characterized in that, The first slot group, the wire start and the wire end are located at one axial end of the winding, and the second slot group and the connecting wire are located at the other axial end of the winding.

7. The winding method for a motor winding according to claim 6, characterized in that, The first cross-slot group and the connecting line both extend out along the first circumferential direction; The second cross-slot group extends out along a second circumferential direction opposite to the first circumferential direction.

8. The method for winding a motor winding according to any one of claims 1-3, characterized in that, Each of the first cross-slot groups includes at least two first cross-slot segments, and each of the second cross-slot groups includes at least two second cross-slot segments; An axial segment of one axial group, a first cross-slot segment of the first cross-slot group, an axial segment of another axial group, and a second cross-slot segment of the second cross-slot group are sequentially connected to form a loop. All the loops of the coil are wound sequentially from the inside to the outside along the radial direction of the loops.

9. The method for winding a motor winding according to any one of claims 1-3, characterized in that, The motor winding has at least two phases, and the winding method of each phase is the same.

10. The method for winding a motor winding according to claim 9, characterized in that, The axial segments of the windings of different phases are located on an arc of the same radius.

11. A motor winding, characterized in that, The motor winding is completed by the winding method of the motor winding according to any one of claims 1-10.

12. A stator, comprising: The stator core and the stator winding wound on the stator core are wound by the winding method of motor winding according to any one of claims 1-10.

13. An electric motor comprising the motor windings according to claim 11, or comprising the stator according to claim 12.

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