Stator core, motor, compressor and vehicle

Abstract

This invention provides a stator core, a motor, a compressor, and a vehicle. The stator core comprises multiple segmented cores connected end-to-end around the axis of the stator core. Each segmented core includes multiple stacked laminations. Each segmented core includes a connected stator yoke and stator teeth, with the stator teeth located between the axes of the stator yoke and the stator core. The stator yoke and stator teeth of any two adjacent segmented cores enclose a stator slot. The wall surface of the stator yoke facing the axis of the stator core is a mating surface. At least a portion of the connection between any two adjacent mating surfaces is smoothly transitioned along the circumference of the stator core. This invention, through a rationally designed segmented core structure, facilitates increasing the size of the connection between two adjacent stator yokes along the radial direction of the stator core, avoiding situations where the connection size between two adjacent stator yokes is too small, which could affect the motor's performance and ensure the stability and efficiency of the motor operation.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and more specifically, to a stator core, an electric motor, a compressor, and a vehicle. Background Technology

[0002] In related technologies, such as Figures 14 to 17 As shown, the stator core 100' includes multiple segmented cores 110', and each segmented core 110' includes multiple stacked laminations 120'. The wall surface of the stator yoke of the segmented core 110' facing the axis of the stator core 100' is inclined, so that the splice 130' of two adjacent stator yokes forms a sharp angle, which reduces the size of the connection between two adjacent stator yokes along the radial direction of the stator core 100', affecting the performance of the motor and interfering with the winding nozzle, affecting the winding effect. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, a first aspect of the present invention provides a stator core.

[0005] A second aspect of the present invention provides an electric motor.

[0006] A third aspect of the present invention provides a compressor.

[0007] A fourth aspect of the present invention provides a vehicle.

[0008] In view of the above, a first aspect of the present invention provides a stator core comprising: a plurality of segmented cores connected end-to-end around the axis of the stator core, each segmented core comprising a plurality of stacked laminations; each segmented core comprising a connected stator yoke and stator teeth, the stator teeth being located between the axis of the stator yoke and the axis of the stator core, the stator yoke and stator teeth of any two adjacent segmented cores forming a stator slot; the wall surface of the stator yoke facing the axis of the stator core being a mating surface; and at least a portion of the connection between any two adjacent mating surfaces along the circumference of the stator core being a smooth transition.

[0009] The present invention provides a stator core comprising multiple segmented cores, which are connected end to end around the axis of the stator core to form a cylindrical structure.

[0010] Each segmented iron core includes a connected stator yoke and stator teeth. The stator yoke and stator teeth of any two adjacent segmented iron cores enclose a stator slot. The wall surface of the stator yoke facing the axis of the stator iron core is the mating surface.

[0011] In related technologies, the wall surface of the segmented iron core facing the axis of the stator iron core is inclined. This creates a sharp angle at the joint of two adjacent stator yokes, which reduces the size of the joint of two adjacent stator yokes along the radial direction of the stator iron core, affecting the performance of the motor.

[0012] This application, through a rationally designed segmented core structure, ensures a smooth transition at least a portion of the connection point between any two adjacent stator yokes along the circumferential direction of the stator core. This design facilitates increasing the size of the connection point between two adjacent stator yokes along the radial direction of the stator core, preventing situations where the connection point is too small and thus affecting motor performance, thereby ensuring motor stability and operating efficiency.

[0013] Furthermore, this design ensures a smooth transition at least a portion of the connection between the mating surfaces of any two adjacent stator yokes along the circumference of the stator core. This prevents burrs from forming at the connection points of adjacent stator yokes due to machining and assembly errors, which could easily puncture the slot insulation paper inside the stator core. This guarantees the insulation function of the slot insulation paper and provides stable and reliable structural support for ensuring the performance of the motor. This structural design also has the advantages of simple processing, ease of operation, and low production cost.

[0014] Furthermore, this design ensures that at least a portion of the connection between the mating surfaces of any two adjacent stator yokes along the circumference of the stator core is smoothly transitioned. When winding with the winding nozzle, the connection between two adjacent stator yokes will not interfere with the winding nozzle, allowing the winding nozzle to fit snugly against the bottom of the stator slot. This ensures the proper fit between the winding and the stator core after winding, providing effective structural support for the stability and efficiency of the motor operation.

[0015] The stator core according to the present invention may also have the following additional technical features:

[0016] In the above technical solution, at least a portion of the mating surface is an arc surface, and the mating surfaces of two adjacent stator yokes are smoothly transitioned through the arc surface.

[0017] In this technical solution, the joint between two adjacent segmented iron cores is called a break. Each segmented iron core has a joint surface, and at least a part of the joint surface is an arc surface. When two adjacent stator yokes are joined, the arc surfaces on both sides of the break are connected to ensure that the joint surfaces of the two adjacent stator yokes are smoothly transitioned through the arc surface. This can effectively avoid the occurrence of burrs or sharp points at the joint between two adjacent stator yokes.

[0018] In any of the above technical solutions, the arc surface is further defined as a circular arc surface; the stator core is cross-sectioned along the axis perpendicular to the stator core, and in the cross-section, the radius corresponding to the outline of the circular arc surface is smaller than the thickness of the lamination.

[0019] In this technical solution, the structure of the segmented iron core is rationally designed, with the splicing surface of the segmented iron core being an arc surface. The relationship between the size of the arc surface and the thickness of the laminations is defined, ensuring that when the stator iron core is cross-sectioned along a direction perpendicular to the axis of the stator iron core, the radius corresponding to the outline of the arc surface in the cross-section is smaller than the thickness of the laminations. This prevents interference with the winding nozzle during winding, allowing the winding nozzle to fit snugly against the bottom of the stator slot. This ensures the proper fit between the winding and the stator iron core after winding, providing effective structural support for the stability and efficiency of the motor operation.

[0020] If the radius corresponding to the outline of the arc surface is greater than the thickness of the lamination, it will interfere with the winding nozzle, preventing the winding nozzle from reaching the bottom of the stator slot. This will affect the winding effect and make it impossible to guarantee the fit dimensions between the winding and the stator core.

[0021] It is understandable that the thickness of the lamination refers to the size of the lamination along the axial direction of the stator core.

[0022] In any of the above technical solutions, the segmented iron core further includes: a recessed portion; a main body portion, wherein the recessed portion and the main body portion are stacked along the axial direction of the stator iron core, and the connection between the splicing surfaces of any two adjacent main body portions is smoothly transitioned along the circumference of the stator iron core; wherein, the stator iron core is cross-sectioned along the axial direction perpendicular to the stator iron core, and the cross-sectional area of ​​the stator slot corresponding to the recessed portion is larger than the cross-sectional area of ​​the stator slot corresponding to the main body portion.

[0023] In this technical solution, by reasonably setting the matching structure of the segmented iron core, the segmented iron core includes a stacked sinking part and a main body part.

[0024] In this design, the stator core is cross-sectioned along an axis perpendicular to the stator core, and the cross-sectional area of ​​the stator slot corresponding to the recessed portion is larger than the cross-sectional area of ​​the stator slot corresponding to the main body portion. That is, the slot wall of the stator slot corresponding to the recessed portion and the main body portion enclose a recessed slot, and at least a portion of the slot wall of the stator slot corresponding to the recessed portion and the slot wall of the stator slot corresponding to the main body portion form a stepped structure.

[0025] Specifically, the stator includes a stator core and an insulating support. When the stator core and the insulating support are connected, the insulating support has insulating protrusions that abut against the recessed groove and cover the edge of the recessed portion. In this way, while ensuring the performance of the motor, the height of the stator can be reduced along the axial direction of the stator core, which helps to reduce the stator's occupancy of the motor's internal space, thus reducing the motor's size and weight.

[0026] In addition, this setting can shorten the length of each winding, reduce the amount of winding used, and lower the production cost of the product.

[0027] Furthermore, the smooth transition at the joint surface of any two adjacent main body sections along the circumference of the stator core is beneficial. This design helps to increase the size of the stator yoke joint between two adjacent main body sections along the radial direction of the stator core, thus ensuring the stability and efficiency of motor operation.

[0028] Furthermore, the smooth transition at the joint of any two adjacent main body sections along the circumference of the stator core avoids burrs at the joint of the stator yoke corresponding to the two adjacent main body sections due to processing and assembly errors, which could easily puncture the slot insulation paper inside the stator core. This ensures the insulation function of the slot insulation paper and provides stable and reliable structural support for ensuring the performance of the motor. This structural design also has the advantages of simple processing, ease of operation, and low production cost.

[0029] Furthermore, the smooth transition at the connection point of any two adjacent main body parts along the circumference of the stator core ensures that there is no interference with the winding nozzle when winding, allowing the winding nozzle to fit snugly against the bottom of the stator slot. This guarantees the fit dimensions between the winding and the stator core after winding, providing effective structural support for the stability and efficiency of motor operation.

[0030] In any of the above technical solutions, the groove wall of the stator groove corresponding to the sunken part is located outside the groove wall of the stator groove corresponding to the main body part.

[0031] In this technical solution, the wall of the stator slot corresponding to the recessed portion is located outside the wall of the stator slot corresponding to the main body portion. That is, the recessed groove formed by the wall of the stator slot corresponding to the recessed portion and the main body portion is arranged around the circumference of the stator slot corresponding to the main body portion. This arrangement is beneficial to increasing the mating area and mating angle between the insulating support and the stator core, and is beneficial to improving the stability and reliability of the mating between the insulating support and the stator core.

[0032] In any of the above technical solutions, the number of sunken parts is two, and the two sunken parts are respectively stacked on both sides of the main body.

[0033] In this technical solution, there are two recessed sections. By reasonably setting the cooperation structure between the two recessed sections and the main body, one of the two recessed sections is located on one side of the main body, and the other of the two recessed sections is located on the other side of the main body. That is to say, the two recessed sections are stacked on both sides of the main body.

[0034] When the stator core is connected to the insulating support, the insulating protrusions on the insulating support can cover both sides of the stator core. In this way, while ensuring the performance of the motor, the height of the stator can be reduced along the axial direction of the stator core, which helps to reduce the stator's occupation of the internal space of the motor, thereby reducing the size and weight of the motor.

[0035] Furthermore, due to the reduced end thickness of the insulating support, the axial length of the winding wound on the segmented iron core will also be reduced, thereby reducing the amount of winding used and helping to reduce the production cost of the product.

[0036] In any of the above technical solutions, the first center line of the slot opening of the stator slot corresponding to the sunken part is located on one side of the second center line of the stator slot corresponding to the sunken part; the third center line of the slot opening of the stator slot corresponding to the main body part is located on one side of the fourth center line of the stator slot corresponding to the main body part.

[0037] In this technical solution, the center line of the stator slot corresponding to the sunken part is denoted as the first center line, and the center line of the stator slot corresponding to the sunken part is denoted as the second center line. The first center line is located on one side of the second center line. In this way, the magnetic reluctance torque caused by the asymmetry of the rotor magnetic circuit structure is fully utilized. When the motor is working, the rotor rotation inside the stator core increases the magnetic reluctance torque of the motor, thereby increasing the motor torque and torque coefficient without changing the back EMF coefficient, and ensuring that the motor has a high torque output capability when rotating.

[0038] The center line of the stator slot corresponding to the main body is denoted as the third center line, and the center line of the stator slot corresponding to the main body is denoted as the fourth center line. The third center line is located to one side of the fourth center line. This fully utilizes the reluctance torque caused by the asymmetry of the rotor magnetic circuit structure. When the motor is working, the rotor rotation inside the stator core increases the motor's reluctance torque, thereby increasing the motor torque and torque coefficient without changing the back EMF coefficient, ensuring high torque output capability during motor rotation. The motor is a unidirectional rotating motor.

[0039] In any of the above technical solutions, the first center line is parallel to the second center line; the third center line is parallel to the fourth center line.

[0040] In this technical solution, the first center line is parallel to the second center line, that is, the first center line and the second center line are parallel and do not coincide; the third center line is parallel to the fourth center line, that is, the third center line and the fourth center line are parallel and do not coincide.

[0041] Specifically, the segmented core is cross-sectioned along the axis perpendicular to the stator core. In the cross-section, the line connecting the joint of two adjacent stator yokes and the center of the stator core is the center line of the stator slot.

[0042] In any of the above technical solutions, the first center line is located on one side of the third center line; along the circumference of the stator core, the slot width of the stator slot corresponding to the recessed part is greater than the slot width of the stator slot corresponding to the main body part.

[0043] In this technical solution, by rationally configuring the stator core structure, the first center line is located to one side of the third center line, and along the circumference of the stator core, the slot width of the stator slot corresponding to the recessed part is greater than the slot width of the stator slot corresponding to the main body part. This configuration not only improves the motor torque and torque coefficient, ensuring high torque output capability when the motor rotates, but also reduces the processing difficulty of the stator core, facilitating mass production and lowering product manufacturing costs.

[0044] In any of the above technical solutions, the stator tooth further includes: a tooth body connected to the stator yoke; a tooth crown connected to the end of the tooth body facing away from the stator yoke, the tooth crown including a first pole shoe and a second pole shoe, the first pole shoe and the second pole shoe being located on both sides of the tooth body along the circumference of the stator core; the end face of the first pole shoe corresponding to the recessed portion facing away from the tooth body is coplanar with the end face of the first pole shoe corresponding to the main body facing away from the tooth body; the end face of the second pole shoe corresponding to the recessed portion facing away from the tooth body is located inside the end face of the second pole shoe corresponding to the main body facing away from the tooth body.

[0045] In this technical solution, the stator tooth includes a tooth body and a tooth crown. The tooth crown includes a first pole shoe and a second pole shoe. Along the circumference of the stator core, the first pole shoe and the second pole shoe are located on both sides of the tooth body, that is, the slot opening of the stator slot is defined between the first pole shoe and the second pole shoe of two adjacent segmented cores.

[0046] The end face of the first pole shoe corresponding to the recessed portion, facing away from the tooth body, is coplanar with the end face of the first pole shoe corresponding to the main body, also facing away from the tooth body. The end face of the second pole shoe corresponding to the recessed portion, facing away from the tooth body, is located inside the end face of the second pole shoe corresponding to the main body, facing away from the tooth body. This design makes it feasible to machine the stator core, reduces the machining difficulty of the stator core, facilitates machining, enables mass production, and reduces product production costs.

[0047] Specifically, along the circumference of the stator core, the center line corresponding to the portion between the first and second pole shoes of two adjacent segmented cores is the center line of the stator slot opening.

[0048] Specifically, along the axis perpendicular to the stator core, the projection of the end face of the first pole shoe corresponding to the recessed portion away from the tooth body onto a predetermined plane coincides with the projection of the end face of the first pole shoe corresponding to the main body away from the tooth body onto a predetermined plane, wherein the predetermined plane is perpendicular to the axis of the stator core.

[0049] In any of the above technical solutions, further, the multiple laminations of each segmented iron core include: multiple first lamination layers and multiple second lamination layers. Along the axial direction of the stator iron core, a second lamination layer is sandwiched between any two adjacent first lamination layers. The first lamination layer includes at least one first lamination, and the second lamination layer includes at least one second lamination. Along the circumferential direction of the stator iron core, an overlapping portion is provided on the first side of the first lamination layer, and a notch is provided on the second side of the first lamination layer. Along the circumferential direction of the stator iron core, a notch is provided on the first side of the second lamination layer, and an overlapping portion is provided on the second side of the second lamination layer. Along the axial direction of the stator iron core, two adjacent overlapping portions are located on both sides of the notch, defining an overlapping gap. When two adjacent segmented iron cores are connected, the overlapping portion on one segmented iron core can be inserted into the overlapping gap of the other segmented iron core, and the height of the portion of the overlapping portion that is first inserted into the overlapping gap during the rounding process is less than the distance of the overlapping gap.

[0050] In this technical solution, the segmented iron core includes multiple first lamination layers and multiple second lamination layers, with a second lamination layer sandwiched between any two adjacent first lamination layers. Each first lamination layer has a fracture, with an overlapping portion on a first side of the fracture and a notch on a second side of the fracture; the second lamination layer also has a fracture, with a notch on a first side of the fracture and an overlapping portion on a second side of the fracture.

[0051] Thus, when multiple first lamination layers and multiple second lamination layers are alternately distributed along the axial direction of the stator core, the overlapping portions of two adjacent first lamination layers are spaced apart on the first side of the fracture, and the overlapping gap on the first side of the fracture is defined directly at the notch of the second lamination layer between these two first lamination layers. Correspondingly, the overlapping portions of two adjacent second lamination layers are spaced apart on the second side of the fracture, and the overlapping gap on the first side of the fracture is defined directly at the notch of the first lamination layer between these two second lamination layers.

[0052] Understandably, the stator core has a break, allowing it to be unfolded and reassembled at the break. Specifically, with the stator core unfolded, the winding can be wound onto the stator teeth. Because the stator core is unfolded, the stator slots have sufficient space for winding, facilitating insulation treatment. After winding, the stator core can be reassembled and reassembled.

[0053] Specifically, when the stator core is in its unfolded state, an overlapping gap is formed on the first side of the stator core circumferentially around the fracture, and an overlapping portion is formed on the second side of the stator core circumferentially around the fracture. When two adjacent segmented cores are connected, the overlapping portion on one segmented core can be inserted into the overlapping gap of the other segmented core. In other words, when performing the splicing and rounding process on the stator core, the overlapping portion can be inserted into the overlapping gap, thereby completing the splicing and rounding process of the stator core.

[0054] Furthermore, during the assembly process, the end of the overlapping portion is inserted into the overlapping gap first. Therefore, by optimizing the overlapping portion, the height of the part of the overlapping portion that is first inserted into the overlapping gap during the assembly process is designed to be less than the distance of the overlapping gap. In this way, during the assembly process, it is ensured that the end of the overlapping portion can be smoothly inserted into the overlapping gap first, and there will be no interference or collision during the insertion of the overlapping portion. It is even possible to compensate for the tolerances of the overlapping portion and the overlapping gap, as well as defects such as burrs generated during the manufacturing process of the overlapping portion, by optimizing the height of the end of the overlapping portion, thus ensuring the efficiency of the assembly process and, consequently, the quality of the final manufactured stator core.

[0055] Therefore, the stator proposed in this invention optimizes the height of the end of the overlapping part. The height of the part of the overlapping part that is first inserted into the overlapping gap during the process of joining the circles is less than the distance of the overlapping gap. This ensures that the end of the overlapping part can be smoothly inserted into the overlapping gap during the process of joining the circles, thereby solving the problem of poor splicing caused by manufacturing errors or defects such as burrs in related technologies.

[0056] In any of the above technical solutions, further, along the axial direction of the stator core, the projections of the end faces of the overlapping portions of the multiple second lamination layers away from the notch portions on the first plane coincide; along the axial direction of the stator core, the projections of the end faces of the overlapping portions of the multiple first lamination layers away from the notch portions on the first plane coincide; wherein, the first plane is a plane perpendicular to the axis of the stator core.

[0057] In this technical solution, along the axial direction of the stator core, the projections of the overlapping portions of multiple second lamination layers away from the notch portions on the first plane coincide, and the projections of the overlapping portions of multiple first lamination layers away from the notch portions on the first plane also coincide. This arrangement ensures that after the stator core is rounded, the projections of the fracture surfaces of the multiple first lamination layers and the multiple second lamination layers on the first plane coincide along the axial direction of the stator core. This arrangement facilitates processing, is feasible for mass production, and helps reduce product production costs while ensuring the performance of the stator core.

[0058] In any of the above technical solutions, further, along the axial direction of the stator core, the projections of the overlapping portions of the plurality of second lamination layers toward the endpoints of the stator core axis onto the second plane coincide; along the axial direction of the stator core, the projections of the overlapping portions of the plurality of first lamination layers toward the endpoints of the stator core axis onto the second plane coincide; wherein, the second plane is a plane perpendicular to the axis of the stator core.

[0059] In this technical solution, along the axial direction of the stator core, the projections of the overlapping portions of multiple second lamination layers toward the axis of the stator core onto a second plane coincide, as do the projections of the overlapping portions of multiple first lamination layers toward the axis of the stator core onto the second plane. After the stator core is rounded, along the axial direction of the stator core, the projections of the fracture surfaces of multiple first lamination layers toward the endpoints of the stator core and the fracture surfaces of multiple second lamination layers toward the endpoints of the stator core onto the second plane coincide. This configuration provides effective and reliable structural support for a smooth transition at the joint surfaces of any two adjacent stator yokes along the circumference of the stator core.

[0060] In any of the above technical solutions, the overlapping portion further includes: an insertion portion inserted into the overlapping gap; a guide portion disposed on the insertion portion and inserted into the overlapping gap first during the closing process; the height of the guide portion is less than the height of the insertion portion.

[0061] In this technical solution, the overlapping portion includes an insertion portion and a guide portion. The guide portion is disposed on the insertion portion and is inserted into the overlapping gap first during the merging process. Therefore, this invention optimizes the height of the guide portion, ensuring that its height is less than that of the insertion portion. This optimizes the overlapping portion into a structure that is thin at the edges and thick in the middle, ensuring that the guide portion plays a good guiding role during the merging process and that both the guide portion and the insertion portion are smoothly inserted into the overlapping gap.

[0062] Furthermore, the height of the guide section is designed to be less than the distance of the overlapping gap, while the height of the insertion section matches the distance of the overlapping gap. This ensures that the guide section can be smoothly inserted into the overlapping gap, and also ensures that after the stator is assembled, the insertion section contacts the inner wall of the overlapping gap, maximizing friction and facilitating subsequent welding. Moreover, this design ensures the precise dimensions of the inner and outer diameters of the stator core after assembly, guaranteeing accurate roundness and significantly reducing iron losses in motors using this stator, thus improving the performance of both the stator and the motor.

[0063] A second aspect of the present invention provides an electric motor comprising: a stator core of any of the technical solutions in the first aspect.

[0064] The motor provided by the present invention includes a stator core as described in any of the technical solutions in the first aspect, and therefore has all the beneficial effects of the stator core, which will not be described in detail here.

[0065] A third aspect of the invention provides a compressor comprising the motor described in the second aspect.

[0066] The compressor provided by the present invention includes the motor described in the second aspect, and therefore has all the beneficial effects of the motor described above, which will not be described in detail here.

[0067] A fourth aspect of the invention provides a vehicle comprising the compressor described in the third aspect.

[0068] The vehicle provided by the present invention includes the compressor described in the third aspect, and therefore has all the beneficial effects of the compressor described above, which will not be described in detail here.

[0069] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0070] 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:

[0071] Figure 1 A first-view structural schematic diagram of a stator core according to an embodiment of the present invention is shown;

[0072] Figure 2 A second-view structural schematic diagram of a stator core according to an embodiment of the present invention is shown;

[0073] Figure 3 A third-view structural schematic diagram of a stator core according to an embodiment of the present invention is shown;

[0074] Figure 4 A first-view structural schematic diagram of a segmented iron core according to an embodiment of the present invention is shown;

[0075] Figure 5 A second-view structural schematic diagram of a segmented iron core according to an embodiment of the present invention is shown;

[0076] Figure 6 A third-view structural schematic diagram of a segmented iron core according to an embodiment of the present invention is shown;

[0077] Figure 7 for Figure 6 A magnified view of part A;

[0078] Figure 8 A fourth-view structural schematic diagram of a segmented iron core according to an embodiment of the present invention is shown;

[0079] Figure 9A first-view structural schematic diagram of the sunken portion according to an embodiment of the present invention is shown;

[0080] Figure 10 A second-view structural schematic diagram of the sunken portion according to an embodiment of the present invention is shown;

[0081] Figure 11 A first-view structural schematic diagram of the main body of an embodiment of the present invention is shown;

[0082] Figure 12 for Figure 11 A magnified view of section B;

[0083] Figure 13 A second-view structural schematic diagram of the main body of an embodiment of the present invention is shown;

[0084] Figure 14 A schematic diagram of the stator core structure in the related technology is shown;

[0085] Figure 15 for Figure 14 A magnified view of a portion at point C;

[0086] Figure 16 A schematic diagram of the structure of a lamination in the related technology is shown;

[0087] Figure 17 for Figure 16 A magnified view of a portion of point D.

[0088] in, Figures 1 to 13 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0089] 100 Stator core, 110 Segmented core, 112 Stator yoke, 114 Stator tooth, 116 Tooth body, 118 First pole shoe, 120 Second pole shoe, 122 Stator slot, 124 Joint surface, 130 Recessed part, 140 Main body, 150 First center line, 160 Second center line, 170 Third center line, 180 Fourth center line, 190 First lamination layer, 200 Second lamination layer, 210 Overlapping part, 220 Notch part, 230 Overlapping gap, 232 Insertion part, 234 Guide part;

[0090] Figures 14 to 17 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0091] 100' stator core, 110' segmented core, 120' laminations, 130' splice joint. Detailed Implementation

[0092] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0093] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0094] The following reference Figures 1 to 13 The stator core 100, motor, compressor, and vehicle are described according to some embodiments of the present invention.

[0095] Example 1:

[0096] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 11 and Figure 12 As shown, an embodiment of the first aspect of the present invention provides a stator core 100, which includes a plurality of segmented cores 110. The plurality of segmented cores 110 are connected end to end in sequence around the axis of the stator core 100, and each segmented core 110 includes a plurality of stacked laminations.

[0097] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0098] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between any two adjacent mating surfaces 124 is smoothly transitioned.

[0099] In detail, the stator core 100 includes multiple segmented cores 110, which are connected end to end around the axis of the stator core 100 to form a cylindrical structure.

[0100] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122. The wall surface of the stator yoke 112 facing the axis of the stator iron core 100 is the splicing surface 124.

[0101] In related technologies, the wall surface of the segmented iron core 110' facing the axis of the stator iron core 100' is inclined. As a result, the splice of two adjacent stator yokes forms a sharp angle, which reduces the size of the splice of two adjacent stator yokes along the radial direction of the stator iron core 100', affecting the performance of the motor.

[0102] This application, through a reasonable configuration of the segmented core 110, ensures a smooth transition at least a portion of the connection points between any two adjacent stator yokes 112 along the circumference of the stator core 100 at the joint surfaces 124. This configuration facilitates increasing the size of the connection points between two adjacent stator yokes 112 along the radial direction of the stator core 100, preventing situations where the size of the connection points between two adjacent stator yokes 112 is too small, which could affect the motor's performance and ensure the stability and efficiency of the motor operation.

[0103] Furthermore, by ensuring a smooth transition at least a portion of the connection points of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100, at least a portion of the connection points can avoid burrs caused by machining and assembly errors at the connection points of adjacent stator yokes 112, which could easily puncture the slot insulation paper inside the stator core 100. This ensures the insulation function of the slot insulation paper and provides stable and reliable structural support for ensuring the performance of the motor. This structural design also has the advantages of simple processing, ease of operation, and low production cost.

[0104] Furthermore, this ensures that at least a portion of the connection point of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100 is smoothly transitioned. When winding with the winding nozzle, the connection point of the two adjacent stator yokes 112 will not interfere with the winding nozzle, allowing the winding nozzle to fit snugly against the bottom of the stator slot 122. This ensures the fit dimensions between the winding and the stator core 100 after winding, providing effective structural support for the stability and efficiency of motor operation.

[0105] Specifically, along the circumference of the stator core 100, the connection between any two adjacent mating surfaces 124 is completely smooth; or along the circumference of the stator core 100, a portion of the connection between any two adjacent mating surfaces 124 is smoothly transitioned.

[0106] Example 2:

[0107] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, based on Embodiment 1, Embodiment 2 provides a stator core 100, which includes multiple segmented cores 110. The multiple segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes multiple stacked laminations.

[0108] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0109] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0110] Furthermore, at least a portion of the mating surface 124 is an arc surface, and the mating surfaces 124 of two adjacent stator yokes 112 are smoothly transitioned through the arc surface.

[0111] In detail, the mating point of two adjacent segmented iron cores 110 is referred to as the break. Each segmented iron core 110 has a mating surface 124, and at least a portion of the mating surface 124 is an arc surface. When two adjacent stator yokes 112 are mated, the arc surfaces on both sides of the break are mated and connected so that the mating surfaces 124 of the two adjacent stator yokes 112 can smoothly transition through the arc surface. In this way, burrs or sharp points can be effectively avoided at the connection point of the two adjacent stator yokes 112.

[0112] In this embodiment, along the circumference of the stator core 100, the splicing surface 124 of the segmented core 110 includes an inclined surface and an arc surface.

[0113] In some other embodiments, the splicing surface 124 of the segmented iron core 110 is an arc surface.

[0114] Furthermore, the arc surface is a circular arc surface; the stator core 100 is cross-sectioned along the direction perpendicular to the axis of the stator core 100, and in the cross-section, the radius corresponding to the outline of the circular arc surface is smaller than the thickness of the lamination.

[0115] In detail, the structure of the segmented iron core 110 is rationally designed. The splicing surface 124 of the segmented iron core 110 is an arc surface, and the relationship between the size of the arc surface and the thickness of the lamination is defined. This ensures that when the stator iron core 100 is cross-sectioned along a direction perpendicular to the axis of the stator iron core 100, the radius corresponding to the outline of the arc surface in the cross-section is smaller than the thickness of the lamination. This prevents interference with the winding nozzle during winding, allowing the winding nozzle to fit snugly against the bottom of the stator slot 122. This ensures the proper fit between the winding and the stator iron core 100 after winding, providing effective structural support for the stability and efficiency of the motor operation.

[0116] If the radius corresponding to the outline of the arc surface is greater than the thickness of the lamination, it will interfere with the winding nozzle, and the winding nozzle will not be able to extend to the bottom of the stator slot 122. This will affect the winding effect and will not be able to guarantee the fit dimensions between the winding and the stator core 100.

[0117] It is understandable that the thickness of the lamination refers to the size of the lamination along the axial direction of the stator core.

[0118] Example 3:

[0119] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, based on any of the above embodiments, Embodiment 3 provides a stator core 100, which includes a plurality of segmented cores 110. The plurality of segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes a plurality of stacked laminations.

[0120] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0121] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0122] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 13 As shown, the segmented iron core 110 includes a recessed portion 130 and a main body portion 140 stacked together. The recessed portion 130 and the main body portion 140 are stacked along the axial direction of the stator iron core 100. Along the circumference of the stator iron core 100, the connection between the splicing surfaces of any two adjacent main body portions 140 is smoothly transitioned. The stator iron core 100 is cross-sectioned along the axial direction perpendicular to the stator iron core 100. The cross-sectional area of ​​the stator slot 122 corresponding to the recessed portion 130 is larger than the cross-sectional area of ​​the stator slot 122 corresponding to the main body portion 140.

[0123] In detail, by reasonably setting the matching structure of the segmented iron core 110, the segmented iron core 110 includes a stacked recessed part 130 and a main body part 140.

[0124] In this design, a cross-section of the stator core 100 is taken along a direction perpendicular to the axis of the stator core 100, and the cross-sectional area of ​​the stator slot 122 corresponding to the recessed portion 130 is larger than the cross-sectional area of ​​the stator slot 122 corresponding to the main body portion 140. That is, the slot wall of the stator slot 122 corresponding to the recessed portion 130 and the main body portion 140 enclose a recessed groove, and at least a portion of the slot wall of the stator slot 122 corresponding to the recessed portion 130 and the slot wall of the stator slot 122 corresponding to the main body portion 140 form a stepped structure.

[0125] Specifically, the stator includes a stator core 100 and an insulating support. When the stator core 100 is connected to the insulating support, the insulating support has insulating protrusions that abut against the recessed groove and cover the edge of the recessed portion 130. In this way, while ensuring the performance of the motor, the height of the stator can be reduced along the axial direction of the stator core 100, which helps to reduce the stator's occupancy of the motor's internal space, thus reducing the motor's size and weight.

[0126] In addition, this setting can shorten the length of each winding, reduce the amount of winding used, and lower the production cost of the product.

[0127] Specifically, the connection points of the splicing surfaces 124 corresponding to any two adjacent main body parts 140 are smoothly transitioned.

[0128] Furthermore, such as Figure 1 , Figure 2 and Figure 3 As shown, the wall of the stator slot 122 corresponding to the recessed portion 130 is located outside the wall of the stator slot 122 corresponding to the main body portion 140.

[0129] In this configuration, the wall of the stator slot 122 corresponding to the recessed portion 130 is located outside the wall of the stator slot 122 corresponding to the main body portion 140. Specifically, the recessed groove formed by the wall of the stator slot 122 corresponding to the recessed portion 130 and the main body portion 140 is arranged around the circumference of the stator slot 122 corresponding to the main body portion 140. This arrangement helps to increase the mating area and mating angle between the insulating support and the stator core 100, thereby improving the stability and reliability of the mating between the insulating support and the stator core 100.

[0130] Example 4:

[0131] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12As shown, based on Embodiment 3, Embodiment 4 provides a stator core 100, which includes multiple segmented cores 110. The multiple segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes multiple stacked laminations.

[0132] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0133] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0134] The segmented iron core 110 includes a recessed portion 130 and a main body portion 140 stacked together. The recessed portion 130 and the main body portion 140 are stacked along the axial direction of the stator iron core 100. The stator iron core 100 is cross-sectioned along the axial direction perpendicular to the stator iron core 100. The cross-sectional area of ​​the stator slot 122 corresponding to the recessed portion 130 is larger than the cross-sectional area of ​​the stator slot 122 corresponding to the main body portion 140.

[0135] Furthermore, there are two recessed portions 130, which are stacked on both sides of the main body portion 140.

[0136] Specifically, there are two recessed portions 130. By reasonably arranging the matching structure between the two recessed portions 130 and the main body 140, one of the two recessed portions 130 is located on one side of the main body 140, and the other of the two recessed portions 130 is located on the other side of the main body 140. That is to say, the two recessed portions 130 are respectively stacked on both sides of the main body 140.

[0137] When the stator core 100 is connected to the insulating support, the insulating protrusions on the insulating support can cover both sides of the stator core 100. In this way, while ensuring the performance of the motor, the height of the stator can be reduced along the axial direction of the stator core 100, which helps to reduce the stator's occupation of the internal space of the motor, and thus helps to reduce the size and weight of the motor.

[0138] Furthermore, due to the reduced end thickness of the insulating support, the axial length of the winding wound on the segmented iron core 110 will also be reduced, thereby reducing the amount of winding used and helping to reduce the production cost of the product.

[0139] Example 5:

[0140] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, based on Embodiment 3 or Embodiment 4, Embodiment 5 provides a stator core 100, which includes a plurality of segmented cores 110. The plurality of segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes a plurality of stacked laminations.

[0141] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0142] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0143] The segmented iron core 110 includes a recessed portion 130 and a main body portion 140 stacked together. The recessed portion 130 and the main body portion 140 are stacked along the axial direction of the stator iron core 100. The stator iron core 100 is cross-sectioned along the axial direction perpendicular to the stator iron core 100. The cross-sectional area of ​​the stator slot 122 corresponding to the recessed portion 130 is larger than the cross-sectional area of ​​the stator slot 122 corresponding to the main body portion 140.

[0144] Furthermore, such as Figure 10 As shown, the first center line 150 of the stator slot 122 corresponding to the recessed portion 130 is located on one side of the second center line 160 of the stator slot 122 corresponding to the recessed portion 130.

[0145] like Figure 13 As shown, the third center line 170 of the stator slot 122 opening corresponding to the main body 140 is located on one side of the fourth center line 180 of the stator slot 122 corresponding to the main body 140.

[0146] In detail, the center line of the stator slot 122 corresponding to the recessed part 130 is denoted as the first center line 150, and the center line of the stator slot 122 corresponding to the recessed part 130 is denoted as the second center line 160. The first center line 150 is located on one side of the second center line 160. In this way, the magnetic reluctance torque caused by the asymmetry of the rotor magnetic circuit structure is fully utilized. When the motor is working, the rotor rotation inside the stator core 100 increases the magnetic reluctance torque of the motor, thereby increasing the motor torque and torque coefficient without changing the back EMF coefficient, and ensuring that the motor has a high torque output capability when rotating.

[0147] The center line of the stator slot 122 corresponding to the main body 140 is designated as the third center line 170, and the center line of the stator slot 122 corresponding to the main body 140 is designated as the fourth center line 180. The third center line 170 is located to one side of the fourth center line 180. This fully utilizes the reluctance torque caused by the asymmetry of the rotor magnetic circuit structure. When the motor is working, the rotor rotation inside the stator core 100 increases the motor's reluctance torque, thereby increasing the motor torque and torque coefficient without changing the back EMF coefficient, ensuring a high torque output capability during motor rotation. The motor is a unidirectional rotating motor.

[0148] Furthermore, the first center line 150 is parallel to the second center line 160; the third center line 170 is parallel to the fourth center line 180.

[0149] Among them, the first center line 150 is parallel to the second center line 160, that is, the first center line 150 and the second center line 160 are parallel and do not coincide; the third center line 170 is parallel to the fourth center line 180, that is, the third center line 170 and the fourth center line 180 are parallel and do not coincide.

[0150] Specifically, the segmented core 110 is cross-sectioned along the direction perpendicular to the axis of the stator core 100. In the cross-section, the line connecting the joint surface 124 of two adjacent stator yokes 112 and the center of the stator core 100 is the center line of the stator slot 122.

[0151] Example 6:

[0152] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, based on embodiment 5, embodiment 6 provides a stator core 100, which includes multiple segmented cores 110. The multiple segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes multiple stacked laminations.

[0153] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0154] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0155] The segmented iron core 110 includes a recessed portion 130 and a main body portion 140 stacked together. The recessed portion 130 and the main body portion 140 are stacked along the axial direction of the stator iron core 100. The stator iron core 100 is cross-sectioned along the axial direction perpendicular to the stator iron core 100. The cross-sectional area of ​​the stator slot 122 corresponding to the recessed portion 130 is larger than the cross-sectional area of ​​the stator slot 122 corresponding to the main body portion 140.

[0156] The first center line 150 of the stator slot 122 corresponding to the recessed part 130 is located on one side of the second center line 160 of the stator slot 122 corresponding to the recessed part 130.

[0157] Furthermore, the first centerline 150 is located on one side of the third centerline 170.

[0158] Along the circumference of the stator core 100, the slot width of the stator slot 122 corresponding to the recessed portion 130 is greater than the slot width of the stator slot 122 corresponding to the main body portion 140.

[0159] In detail, by rationally configuring the structure of the stator core 100, the slot width of the stator slot 122 corresponding to the recessed portion 130 along the circumference of the stator core 100 is greater than the slot width of the stator slot 122 corresponding to the main body portion 140. This configuration not only improves the motor torque and torque coefficient, ensuring a high torque output capability when the motor rotates, but also reduces the processing difficulty of the stator core 100, facilitating mass production and lowering product manufacturing costs.

[0160] Example 7:

[0161] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, based on Embodiment 3 or Embodiment 4, Embodiment 7 provides a stator core 100, which includes a plurality of segmented cores 110. The plurality of segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes a plurality of stacked laminations.

[0162] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0163] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0164] The segmented iron core 110 includes a recessed portion 130 and a main body portion 140 stacked together. The recessed portion 130 and the main body portion 140 are stacked along the axial direction of the stator iron core 100. The stator iron core 100 is cross-sectioned along the axial direction perpendicular to the stator iron core 100. The cross-sectional area of ​​the stator slot 122 corresponding to the recessed portion 130 is larger than the cross-sectional area of ​​the stator slot 122 corresponding to the main body portion 140.

[0165] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the stator tooth 114 includes a tooth body 116 and a tooth crown, the tooth crown including a first pole shoe 118 and a second pole shoe 120.

[0166] The tooth body 116 is connected to the stator yoke 112; the tooth crown is connected to the end of the tooth body 116 away from the stator yoke 112. Along the circumference of the stator core 100, the first pole shoe 118 and the second pole shoe 120 are located on both sides of the tooth body 116. The end face of the first pole shoe 118 corresponding to the recessed portion 130 is away from the tooth body 116, and the end face of the first pole shoe 118 corresponding to the main body portion 140 is coplanar with the end face of the first pole shoe 118 away from the tooth body 116.

[0167] The second pole shoe 120 corresponding to the recessed portion 130 is located on the inner side of the end face of the second pole shoe 120 corresponding to the main body portion 140 that is away from the end face of the tooth body 116.

[0168] The stator tooth 114 includes a tooth body 116 and a tooth crown. The tooth crown includes a first pole shoe 118 and a second pole shoe 120. Along the circumference of the stator core 100, the first pole shoe 118 and the second pole shoe 120 are located on both sides of the tooth body 116. That is, the slot of the stator slot 122 is defined between the first pole shoe 118 and the second pole shoe 120 of two adjacent segmented cores 110.

[0169] The end face of the first pole shoe 118 corresponding to the recessed portion 130 that is away from the tooth body 116 is coplanar with the end face of the first pole shoe 118 corresponding to the main body 140 that is away from the tooth body 116. The end face of the second pole shoe 120 corresponding to the recessed portion 130 that is away from the tooth body 116 is located inside the end face of the second pole shoe 120 corresponding to the main body 140 that is away from the tooth body 116.

[0170] This setup makes it feasible to process the stator core 100, reduces the processing difficulty of the stator core 100, facilitates processing, enables mass production, and reduces the production cost of the product.

[0171] Specifically, along the circumference of the stator core 100, the center line corresponding to the portion between the first pole shoe 118 and the second pole shoe 120 of two adjacent segmented cores 110 is the center line of the stator slot 122 opening.

[0172] Example 8:

[0173] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, based on any of the above embodiments, Embodiment 8 provides a stator core 100, which includes a plurality of segmented cores 110. The plurality of segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes a plurality of stacked laminations.

[0174] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0175] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0176] Furthermore, such as Figure 6 and Figure 7 As shown, each segmented core 110 has multiple laminations including multiple first lamination layers 190 and multiple second lamination layers 200. Along the axial direction of the stator core 100, a second lamination layer 200 is sandwiched between any two adjacent first lamination layers 190.

[0177] The first lamination layer 190 includes at least one first lamination, and the second lamination layer 200 includes at least one second lamination.

[0178] Along the circumference of the stator core 100, the first lamination layer 190 has an overlapping portion 210 on its first side and a notch portion 220 on its second side. The second lamination layer 200 has a notch portion 220 on its first side and an overlapping portion 210 on its second side.

[0179] Along the axial direction of the stator core 100, two adjacent overlapping portions 210 are located on both sides of the notch portion 220, defining an overlapping gap 230.

[0180] When two adjacent segmented iron cores 110 are connected, the overlapping part 210 on one segmented iron core 110 can be inserted into the overlapping gap 230 of the other segmented iron core 110, and the height of the part of the overlapping part 210 that is first inserted into the overlapping gap 230 during the process of forming a circle is less than the distance of the overlapping gap 230.

[0181] In detail, the segmented iron core 110 includes multiple first lamination layers 190 and multiple second lamination layers 200, with a second lamination layer 200 sandwiched between any two adjacent first lamination layers 190. The first lamination layer 190 has a fracture, with an overlapping portion 210 on the first side of the fracture and a notch portion 220 on the second side of the fracture; the second lamination layer 200 has a fracture, with a notch portion 220 on the first side of the fracture and an overlapping portion 210 on the second side of the fracture.

[0182] Thus, along the axial direction of the stator core 100, a second lamination layer 200 is sandwiched between any two adjacent first lamination layers 190. The overlapping portion 210 of the two adjacent first lamination layers 190 has a gap between the first side of the fracture, and the overlapping gap 230 on the first side of the fracture is defined directly at the notch 220 of the second lamination layer 200 between the two first lamination layers 190. Correspondingly, the overlapping portion 210 of the two adjacent second lamination layers 200 has a gap between the second side of the fracture, and the overlapping gap 230 on the first side of the fracture is defined directly at the notch 220 of the first lamination layer 190 between the two second lamination layers 200.

[0183] Understandably, the stator core 100 has a break, allowing it to be unfolded and reassembled at the break. Specifically, when the stator core 100 is unfolded, the winding can be wound onto the stator teeth 114. Since the stator core 100 is unfolded, the stator slots 122 have sufficient space for winding and for appropriate insulation treatment. After the winding is completed, the stator core 100 can be spliced ​​into a reassembled shape.

[0184] Specifically, when the stator core 100 is in the unfolded state, the stator core 100 has an overlapping gap 230 on the first side of the fracture circumference and an overlapping portion 210 on the second side of the fracture circumference. When two adjacent segmented cores 110 are connected, the overlapping portion 210 on one segmented core 110 can be inserted into the overlapping gap 230 of the other segmented core 110. That is to say, when the stator core 100 is spliced ​​into a circle, the overlapping portion 210 can be inserted into the overlapping gap 230 to complete the splicing and circle-forming process of the stator core 100.

[0185] Furthermore, during the assembly process, the end of the overlapping portion 210 is inserted into the overlapping gap 230 first. Therefore, by optimizing the overlapping portion 210, the height of the part of the overlapping portion 210 that is first inserted into the overlapping gap 230 during the assembly process is designed to be less than the distance of the overlapping gap 230. In this way, during the assembly process, it is ensured that the end of the overlapping portion 210 can be smoothly inserted into the overlapping gap 230 first, and there will be no interference or collision during the insertion of the overlapping portion 210. It is even possible to compensate for the tolerances of the overlapping portion 210 and the overlapping gap 230, as well as defects such as burrs generated during the manufacturing process of the overlapping portion 210, by optimizing the height of the end of the overlapping portion 210, thus ensuring the efficiency of the assembly process and, consequently, the quality of the final manufactured stator core 100.

[0186] Therefore, the stator proposed in this application optimizes the height of the end of the overlapping portion 210. The height of the part of the overlapping portion 210 that is first inserted into the overlapping gap 230 during the process of joining the circles is less than the distance of the overlapping gap 230. This ensures that the end of the overlapping portion 210 can be smoothly inserted into the overlapping gap 230 during the process of joining the circles, thereby solving the problem of poor splicing caused by manufacturing errors or defects such as burrs in related technologies.

[0187] In a specific embodiment, the notch 220 can be formed by cutting material. That is, a portion of material can be cut off from the second side of the first stamping layer 190 to form the notch 220, and a portion of material can be cut off from the first side of the second stamping layer 200 to form the notch 220.

[0188] In a specific embodiment, when the first lamination layer 190 includes a plurality of first laminations, the plurality of first laminations are stacked along the axial direction of the stator core 100; when the second lamination layer 200 includes a plurality of second laminations, the plurality of second laminations are stacked along the axial direction of the stator core 100.

[0189] In a specific embodiment, the recessed portion 130 includes a plurality of first stamped layers 190 and a plurality of second stamped layers 200; the main body portion 140 includes a plurality of first stamped layers 190 and a plurality of second stamped layers 200.

[0190] Furthermore, such as Figure 7 As shown, the overlapping portion 210 includes a plug portion 232 and a guide portion 234.

[0191] The insertion part 232 is inserted into the overlapping gap 230, and the guide part 234 is provided on the insertion part 232 and is inserted into the overlapping gap 230 first during the process of closing the circle; the height of the guide part 234 is less than the height of the insertion part 232.

[0192] The overlapping portion 210 includes an insertion portion 232 and a guide portion 234. The guide portion 234 is disposed on the insertion portion 232 and is inserted into the overlapping gap 230 during the joining process. Therefore, the present invention optimizes the height of the guide portion 234 to ensure that its height is less than that of the insertion portion 232. This allows the overlapping portion 210 to be optimized into a structure that is thin at the edges and thick in the middle, ensuring that the guide portion 234 can play a good guiding role during the joining process and that both the guide portion 234 and the insertion portion 232 can be smoothly inserted into the overlapping gap 230.

[0193] Furthermore, the height of the guide portion 234 is smaller than the distance of the overlapping gap 230, and the height of the insertion portion 232 matches the distance of the overlapping gap 230. This ensures that the guide portion 234 can be smoothly inserted into the overlapping gap 230, and also ensures that after the stator core 100 is assembled, the insertion portion 232 contacts the inner wall of the overlapping gap 230 to ensure friction between them and facilitate subsequent welding. Moreover, this design ensures the precise dimensions of the inner and outer diameters of the stator core 100 after assembly, guaranteeing accurate roundness of the stator core 100. This significantly reduces iron loss in motors using this stator and improves the performance of both the stator and the motor.

[0194] Example 9:

[0195] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, based on Embodiment 7, Embodiment 9 provides a stator core 100, which includes multiple segmented cores 110. The multiple segmented cores 110 are connected end to end around the axis of the stator core 100, and each segmented core 110 includes multiple stacked laminations.

[0196] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0197] The wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between the mating surfaces 124 of any two adjacent stator yokes 112 is smoothly transitioned.

[0198] The segmented core 110 includes multiple first lamination layers 190 and multiple second lamination layers 200. Along the axial direction of the stator core 100, a second lamination layer 200 is sandwiched between any two adjacent first lamination layers 190.

[0199] The first lamination layer 190 includes at least one first lamination, and the second lamination layer 200 includes at least one second lamination.

[0200] Along the circumference of the stator core 100, the first lamination layer 190 has an overlapping portion 210 on its first side and a notch portion 220 on its second side. The second lamination layer 200 has a notch portion 220 on its first side and an overlapping portion 210 on its second side.

[0201] Along the axial direction of the stator core 100, two adjacent overlapping portions 210 are located on both sides of the notch portion 220, defining an overlapping gap 230.

[0202] When two adjacent segmented iron cores 110 are connected, the overlapping part 210 on one segmented iron core 110 can be inserted into the overlapping gap 230 of the other segmented iron core 110, and the height of the part of the overlapping part 210 that is first inserted into the overlapping gap 230 during the process of forming a circle is less than the distance of the overlapping gap 230.

[0203] Furthermore, such as Figure 6 As shown, along the axial direction of the stator core 100, the projections of the overlapping portions 210 of a plurality of second lamination layers 200 away from the notch portions 220 on a first plane coincide; along the axial direction of the stator core 100, the projections of the overlapping portions 210 of a plurality of first lamination layers 190 away from the notch portions 220 on a first plane coincide; wherein, the first plane is a plane perpendicular to the axis of the stator core 100.

[0204] In detail, along the axial direction of the stator core 100, the projections of the overlapping portions 210 of the plurality of second lamination layers 200 away from the notch portions 220 on the first plane coincide, and the projections of the overlapping portions 210 of the plurality of first lamination layers 190 away from the notch portions 220 on the first plane also coincide. This arrangement ensures that after the stator core 100 is rounded, the projections of the fracture surfaces of the plurality of first lamination layers 190 and the plurality of second lamination layers 200 on the first plane coincide along the axial direction of the stator core 100. This arrangement facilitates processing, is feasible for mass production, and helps reduce product production costs while ensuring the performance of the stator core 100.

[0205] In some other embodiments, along the axial direction of the stator core 100, the projections of the overlapping portions 210 of a plurality of second lamination layers 200 toward the endpoints of the stator core 100 axis onto a second plane coincide; along the axial direction of the stator core 100, the projections of the overlapping portions 210 of a plurality of first lamination layers 190 toward the endpoints of the stator core 100 axis onto a second plane coincide; wherein, the second plane is a plane perpendicular to the axis of the stator core 100.

[0206] In this configuration, along the axial direction of the stator core 100, the projections of the overlapping portions 210 of the plurality of second lamination layers 200 toward the axis of the stator core 100 onto a second plane coincide, and the projections of the overlapping portions 210 of the plurality of first lamination layers 190 toward the axis of the stator core 100 onto a second plane also coincide. After the stator core 100 is rounded, along the axial direction of the stator core 100, the projections of the fracture surfaces of the plurality of first lamination layers 190 toward the endpoints of the stator core 100 and the fracture surfaces of the plurality of second lamination layers 200 toward the endpoints of the stator core 100 onto a second plane coincide. This configuration provides effective and reliable structural support by ensuring a smooth transition at the connection points of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100.

[0207] Example 10:

[0208] like Figures 1 to 5 , Figure 8 , Figure 11 and Figure 12 As shown, a stator core 100 includes multiple segmented cores 110, which are connected end to end around the axis of the stator core 100. Each segmented core 110 includes multiple stacked laminations.

[0209] like Figures 1 to 5 As shown, each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator tooth 114 is located between the axis of the stator yoke 112 and the axis of the stator iron core 100. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122.

[0210] like Figures 1 to 5 As shown, the wall surface of the stator yoke 112 facing the axis of the stator core 100 is the mating surface 124; along the circumference of the stator core 100, at least a portion of the connection between any two adjacent mating surfaces 124 is smoothly transitioned.

[0211] At least a portion of the mating surface 124 is an arc surface, and the mating surfaces 124 of two adjacent stator yokes 112 are smoothly transitioned through the arc surface.

[0212] The arc surface is a circular arc surface; the stator core 100 is cross-sectioned along the axis perpendicular to the stator core 100, and in the cross-section, the radius corresponding to the outline of the circular arc surface is smaller than the thickness of the lamination.

[0213] like Figures 1 to 5As shown, the segmented iron core 110 includes a recessed portion 130 and a main body portion 140 stacked together. The recessed portion 130 and the main body portion 140 are stacked along the axial direction of the stator iron core 100. Along the circumference of the stator iron core 100, the connection between the splicing surfaces of any two adjacent main body portions 140 is smoothly transitioned. The stator iron core 100 is cross-sectioned along the axial direction perpendicular to the stator iron core 100. The cross-sectional area of ​​the stator slot 122 corresponding to the recessed portion 130 is larger than the cross-sectional area of ​​the stator slot 122 corresponding to the main body portion 140.

[0214] The wall of the stator slot 122 corresponding to the recessed part 130 is located outside the wall of the stator slot 122 corresponding to the main body part 140.

[0215] like Figures 1 to 5 As shown, there are two recessed portions 130, which are stacked on both sides of the main body 140.

[0216] like Figure 10 As shown, the first center line 150 of the stator slot 122 corresponding to the recessed portion 130 is located on one side of the second center line 160 of the stator slot 122 corresponding to the recessed portion 130.

[0217] like Figure 13 As shown, the third center line 170 of the stator slot 122 opening corresponding to the main body 140 is located on one side of the fourth center line 180 of the stator slot 122 corresponding to the main body 140.

[0218] The first center line 150 is parallel to the second center line 160; the third center line 170 is parallel to the fourth center line 180.

[0219] The first centerline 150 is located on one side of the third centerline 170.

[0220] like Figures 1 to 5 As shown, the stator tooth 114 includes a tooth body 116 and a tooth crown, the tooth crown including a first pole shoe 118 and a second pole shoe 120.

[0221] like Figure 6 and Figure 7 As shown, each segmented core 110 has multiple laminations including multiple first lamination layers 190 and multiple second lamination layers 200. Along the axial direction of the stator core 100, a second lamination layer 200 is sandwiched between any two adjacent first lamination layers 190.

[0222] like Figure 7 As shown, the overlapping portion 210 includes a plug portion 232 and a guide portion 234.

[0223] Along the axial direction of the stator core 100, the projections of the overlapping portions 210 of the plurality of second lamination layers 200 away from the end faces of the notch portions 220 on a first plane coincide; along the axial direction of the stator core 100, the projections of the overlapping portions 210 of the plurality of first lamination layers 190 away from the end faces of the notch portions 220 on a first plane coincide; wherein, the first plane is a plane perpendicular to the axis of the stator core 100.

[0224] Example 11:

[0225] An embodiment of the second aspect of the present invention provides an electric motor, comprising: a stator core 100 of any embodiment of the first aspect.

[0226] The electric motor provided by the present invention includes a stator core 100.

[0227] like Figures 1 to 5 As shown, the stator core 100 includes multiple segmented cores 110, which are connected end to end around the axis of the stator core 100 to form a cylindrical structure.

[0228] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122. The wall surface of the stator yoke 112 facing the axis of the stator iron core 100 is the splicing surface 124.

[0229] In related technologies, the wall surface of the segmented iron core 110' facing the axis of the stator iron core 100' is inclined. As a result, the splice of two adjacent stator yokes forms a sharp angle, which reduces the size of the splice of two adjacent stator yokes along the radial direction of the stator iron core 100', affecting the performance of the motor.

[0230] This application, through a reasonable configuration of the segmented core 110, ensures a smooth transition at least a portion of the connection points between any two adjacent stator yokes 112 along the circumference of the stator core 100 at the joint surfaces 124. This configuration facilitates increasing the size of the connection points between two adjacent stator yokes 112 along the radial direction of the stator core 100, preventing situations where the size of the connection points between two adjacent stator yokes 112 is too small, which could affect the motor's performance and ensure the stability and efficiency of the motor operation.

[0231] Furthermore, by ensuring a smooth transition at least a portion of the connection points of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100, at least a portion of the connection points can avoid burrs caused by machining and assembly errors at the connection points of adjacent stator yokes 112, which could easily puncture the slot insulation paper inside the stator core 100. This ensures the insulation function of the slot insulation paper and provides stable and reliable structural support for ensuring the performance of the motor. This structural design also has the advantages of simple processing, ease of operation, and low production cost.

[0232] Furthermore, this ensures that at least a portion of the connection point of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100 is smoothly transitioned, so that there is no interference with the winding nozzle when winding, allowing the winding nozzle to fit snugly against the bottom of the stator slot 122. This ensures the proper fit between the winding and the stator core 100 after winding, providing effective structural support for the stability and efficiency of the motor operation.

[0233] In addition, the motor also includes a rotor, which is located inside the stator and can cooperate with the stator to rotate, thereby outputting torque.

[0234] Example 12:

[0235] A third aspect of the present invention provides a compressor comprising: the motor described in the second aspect.

[0236] The compressor provided by the present invention includes a motor, and the motor includes a stator core 100.

[0237] like Figures 1 to 5 As shown, the stator core 100 includes multiple segmented cores 110, which are connected end to end around the axis of the stator core 100 to form a cylindrical structure.

[0238] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122. The wall surface of the stator yoke 112 facing the axis of the stator iron core 100 is the splicing surface 124.

[0239] In related technologies, the wall surface of the segmented iron core 110' facing the axis of the stator iron core 100' is inclined. As a result, the splice of two adjacent stator yokes forms a sharp angle, which reduces the size of the splice of two adjacent stator yokes along the radial direction of the stator iron core 100', affecting the performance of the motor.

[0240] This application, through a reasonable configuration of the segmented core 110, ensures a smooth transition at least a portion of the connection points between any two adjacent stator yokes 112 along the circumference of the stator core 100 at the joint surfaces 124. This configuration facilitates increasing the size of the connection points between two adjacent stator yokes 112 along the radial direction of the stator core 100, preventing situations where the size of the connection points between two adjacent stator yokes 112 is too small, which could affect the motor's performance and ensure the stability and efficiency of the motor operation.

[0241] Furthermore, by ensuring a smooth transition at least a portion of the connection points of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100, at least a portion of the connection points can avoid burrs caused by machining and assembly errors at the connection points of adjacent stator yokes 112, which could easily puncture the slot insulation paper inside the stator core 100. This ensures the insulation function of the slot insulation paper and provides stable and reliable structural support for ensuring the performance of the motor. This structural design also has the advantages of simple processing, ease of operation, and low production cost.

[0242] Furthermore, this ensures that at least a portion of the connection point of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100 is smoothly transitioned. When winding with the winding nozzle, the connection point of the two adjacent stator yokes 112 will not interfere with the winding nozzle, allowing the winding nozzle to fit snugly against the bottom of the stator slot 122. This ensures the fit dimensions between the winding and the stator core 100 after winding, providing effective structural support for the stability and efficiency of motor operation.

[0243] Example 13:

[0244] An embodiment of the fourth aspect of the present invention provides a vehicle comprising: the compressor of the third aspect.

[0245] The vehicle provided by the present invention includes a compressor, the compressor includes a motor, and the motor includes a stator core 100.

[0246] like Figures 1 to 5 As shown, the stator core 100 includes multiple segmented cores 110, which are connected end to end around the axis of the stator core 100 to form a cylindrical structure.

[0247] Each segmented iron core 110 includes a stator yoke 112 and a stator tooth 114 connected to each other. The stator yoke 112 and stator tooth 114 of any two adjacent segmented iron cores 110 enclose a stator slot 122. The wall surface of the stator yoke 112 facing the axis of the stator iron core 100 is the splicing surface 124.

[0248] In related technologies, the wall surface of the segmented iron core 110' facing the axis of the stator iron core 100' is inclined. As a result, the splice of two adjacent stator yokes forms a sharp angle, which reduces the size of the splice of two adjacent stator yokes along the radial direction of the stator iron core 100', affecting the performance of the motor.

[0249] This application, through a reasonable configuration of the segmented core 110, ensures a smooth transition at least a portion of the connection points between any two adjacent stator yokes 112 along the circumference of the stator core 100 at the joint surfaces 124. This configuration facilitates increasing the size of the connection points between two adjacent stator yokes 112 along the radial direction of the stator core 100, preventing situations where the size of the connection points between two adjacent stator yokes 112 is too small, which could affect the motor's performance and ensure the stability and efficiency of the motor operation.

[0250] Furthermore, by ensuring a smooth transition at least a portion of the connection points of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100, at least a portion of the connection points can avoid burrs caused by machining and assembly errors at the connection points of adjacent stator yokes 112, which could easily puncture the slot insulation paper inside the stator core 100. This ensures the insulation function of the slot insulation paper and provides stable and reliable structural support for ensuring the performance of the motor. This structural design also has the advantages of simple processing, ease of operation, and low production cost.

[0251] Furthermore, this ensures that at least a portion of the connection point of the mating surfaces 124 of any two adjacent stator yokes 112 along the circumference of the stator core 100 is smoothly transitioned. When winding with the winding nozzle, the connection point of the two adjacent stator yokes 112 will not interfere with the winding nozzle, allowing the winding nozzle to fit snugly against the bottom of the stator slot 122. This ensures the fit dimensions between the winding and the stator core 100 after winding, providing effective structural support for the stability and efficiency of motor operation.

[0252] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0253] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the 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.

[0254] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A stator core, characterized in that, include: Multiple segmented iron cores are connected end to end around the axis of the stator iron core, and each segmented iron core includes multiple stacked laminations; Each of the segmented iron cores includes a stator yoke and a stator tooth connected together. The stator tooth is located between the axis of the stator yoke and the axis of the stator iron core. The stator yoke and stator tooth of any two adjacent segmented iron cores enclose a stator slot. The wall surface of the stator yoke facing the axis of the stator core is the mating surface; Along the circumference of the stator core, at least a portion of the connection between any two adjacent mating surfaces is smoothly transitioned; Each of the said segmented iron cores comprises multiple laminations including: Multiple first lamination layers and multiple second lamination layers are provided, with a second lamination layer sandwiched between any two adjacent first lamination layers along the axial direction of the stator core. Each first lamination layer includes at least one first lamination, and each second lamination layer includes at least one second lamination. Along the circumference of the stator core, an overlapping portion is provided on the first side of the first lamination layer, and a notch portion is provided on the second side of the first lamination layer; Along the circumferential direction of the stator core, the notch is provided on the first side of the second lamination layer, and the overlapping portion is provided on the second side of the second lamination layer; Along the axial direction of the stator core, two adjacent overlapping portions are located on both sides of the notch portion, defining an overlapping gap; When two adjacent segmented iron cores are connected, the overlapping portion on one segmented iron core can be inserted into the overlapping gap of the other segmented iron core, and the height of the portion of the overlapping portion that is first inserted into the overlapping gap during the process of forming a circle is less than the distance of the overlapping gap.

2. The stator core according to claim 1, characterized in that, At least a portion of the mating surface is an arc surface, and the mating surfaces of two adjacent stator yokes smoothly transition through the arc surface.

3. The stator core according to claim 2, characterized in that, The arc surface is a circular arc surface; The stator core is cross-sectioned along a direction perpendicular to the axis of the stator core. In the cross-section, the radius corresponding to the outline of the arc surface is smaller than the thickness of the lamination.

4. The stator core according to any one of claims 1 to 3, characterized in that, Along the axial direction of the stator core, the projections of the overlapping portions of the plurality of second lamination layers away from the end faces of the notch portions on the first plane coincide; Along the axial direction of the stator core, the projections of the overlapping portions of the plurality of first lamination layers away from the end faces of the notches on the first plane coincide. The first plane is a plane perpendicular to the axis of the stator core.

5. The stator core according to any one of claims 1 to 3, characterized in that, Along the axial direction of the stator core, the projections of the overlapping portions of the plurality of second lamination layers toward the endpoints of the axis of the stator core on the second plane coincide. Along the axial direction of the stator core, the projections of the overlapping portions of the plurality of first lamination layers toward the endpoints of the axis of the stator core on the second plane coincide; The second plane is a plane perpendicular to the axis of the stator core.

6. The stator core according to any one of claims 1 to 3, characterized in that, The overlapping portion includes: The insertion part is inserted into the overlapping gap; A guide portion is provided on the insertion portion and is inserted into the overlapping gap first during the process of closing the circle; The height of the guide portion is less than the height of the insertion portion.

7. The stator core according to any one of claims 1 to 3, characterized in that, The segmented iron core includes: Sunken section; The main body, along the axial direction of the stator core, the recessed part and the main body are stacked, and along the circumference of the stator core, there is a smooth transition at the connection of the splicing surfaces of any two adjacent main bodies; In this case, the stator core is cross-sectioned along a direction perpendicular to the axis of the stator core, and the cross-sectional area of ​​the stator slot corresponding to the recessed portion is greater than the cross-sectional area of ​​the stator slot corresponding to the main body portion.

8. The stator core according to claim 7, characterized in that, The wall of the stator slot corresponding to the sunken portion is located outside the wall of the stator slot corresponding to the main body portion.

9. The stator core according to claim 7, characterized in that, There are two recessed sections, which are stacked on both sides of the main body.

10. The stator core according to claim 7, characterized in that, The first center line of the slot opening of the stator slot corresponding to the sunken part is located on one side of the second center line of the stator slot corresponding to the sunken part; The third center line of the stator slot opening corresponding to the main body is located on one side of the fourth center line of the stator slot corresponding to the main body.

11. The stator core according to claim 10, characterized in that, The first centerline is parallel to the second centerline; The third center line is parallel to the fourth center line.

12. The stator core according to claim 10, characterized in that, The first centerline is located on one side of the third centerline; Along the circumference of the stator core, the slot width of the stator slot corresponding to the recessed portion is greater than the slot width of the stator slot corresponding to the main body portion.

13. The stator core according to claim 7, characterized in that, The stator teeth include: The tooth body is connected to the stator yoke; The tooth crown is connected to the end of the tooth body that is away from the stator yoke. The tooth crown includes a first pole shoe and a second pole shoe. Along the circumference of the stator core, the first pole shoe and the second pole shoe are located on both sides of the tooth body. The end face of the first pole shoe corresponding to the sunken portion that is away from the tooth body is coplanar with the end face of the first pole shoe corresponding to the main body that is away from the tooth body. The second pole shoe corresponding to the recessed portion is located on the inner side of the end face of the second pole shoe corresponding to the main body that is away from the end face of the tooth body.

14. An electric motor, characterized in that, include: The stator core as described in any one of claims 1 to 13.

15. A compressor, characterized in that, include: The motor as described in claim 14.

16. A vehicle, characterized in that, include: The compressor as described in claim 15.

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