Stator core, motor and vehicle

Abstract

The invention discloses a stator iron core, a motor and a vehicle, the stator comprises an iron core body, the cross section of the iron core body is annular, the outer diameter of the iron core body is R1, the inner diameter of the iron core body is R2, R1-R2 is less than or equal to 200mm, the outer diameter is the maximum distance between the radial outer edge of the iron core body and the central axis of the iron core body, and the inner diameter of the iron core body is R2. The inner diameter is the minimum distance between the radial inner edge of the iron core body and the central axis of the iron core body, and the iron core body is provided with a splicing seam formed by splicing. According to the stator iron core, the splicing seam is arranged on the iron core body, and the difference value between the inner diameter and the outer diameter is smaller than or equal to 200mm, so that in the production process, on one hand, the consistency of splicing modules with smaller sizes is easy to control, the yield of the stator iron core can be improved, on the other hand, the material loss in the production process can be reduced, and the production cost is reduced. The production cost is reduced.

Description

Technical Field

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

[0002] The stator core of the motor guides the magnetic field during the operation of the motor. Therefore, high consistency requirements are placed on various parts of the stator core. In related technologies, when the motor size is larger, the size of the stator core is larger. During the production process, the consistency of the stator core is difficult to control, resulting in a low yield rate of the stator core. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a stator core, which uses amorphous metal parts and has a high yield rate.

[0004] The present invention also provides a motor having the stator core.

[0005] The present invention also provides a vehicle having the motor.

[0006] The stator core according to the first aspect of the present invention is used for an electric motor and includes a core body, the cross-section of the core body is annular, the outer diameter of the core body is R1, the inner diameter of the core body is R2, R1-R2≤200mm, wherein the outer diameter is the maximum distance between the radial outer edge of the core body and the central axis of the core body, the inner diameter is the minimum distance between the radial inner edge of the core body and the central axis of the core body, and the core body has a splicing seam formed by splicing.

[0007] According to the stator core of the first aspect of the present invention, a splicing seam is set on the core body, and the difference between the inner diameter and the outer diameter is less than or equal to 200 mm. During the production process, the core body can be formed by splicing smaller-sized splicing modules. On the one hand, the consistency of the smaller-sized splicing modules is easy to control, which can improve the yield rate of the stator core. On the other hand, it can reduce material loss in the production process and reduce production costs.

[0008] According to some embodiments of the present invention, the core body includes a plurality of fan-shaped splicing modules, the plurality of splicing modules are spliced ​​in sequence along the circumferential direction, and a splicing seam is formed between two adjacent splicing modules.

[0009] According to some embodiments of the present invention, the radially innermost inner edge of the splicing module is the first edge, the radially outermost outer edge of the splicing module is the second edge, and in the radial direction, the distance between the first edge and the second edge is less than or equal to 200 mm.

[0010] According to some embodiments of the present invention, the splicing module includes: a tooth portion and a yoke portion, the yoke portion extends along the circumference of the stator core, and the tooth portion is connected to the inner end or the outer end of the yoke portion in the radial direction of the stator core.

[0011] According to some embodiments of the present invention, the number of the teeth of the stator core is 36-96.

[0012] According to some embodiments of the present invention, a central angle between two ends of the splicing module in the circumferential direction is 45°-180°.

[0013] According to some embodiments of the present invention, at least a portion of the structure of at least one of the plurality of splicing modules is an amorphous metal part.

[0014] According to some embodiments of the present invention, the plurality of splicing modules are all amorphous metal parts.

[0015] According to some embodiments of the present invention, the core body includes at least one splicing module, which is in a strip shape before splicing. The splicing module is bent into an arc or a ring shape during splicing to form the core body. The width of the splicing module before splicing is less than or equal to 200 mm. When the core body includes one splicing module, the splicing seam is formed between the two ends of the splicing module in the circumferential direction after bending. When the core body includes multiple splicing modules, the splicing seam is formed between the ends of two adjacent splicing modules in the circumferential direction of the core body.

[0016] According to some embodiments of the present invention, the core body includes at least one splicing module, the splicing module includes a yoke module and a tooth module, at least one of the yoke modules is spliced ​​to form the yoke of the core body, the number of the tooth modules is multiple, and the multiple tooth modules are connected to the yoke module on one side of the yoke in the radial direction, and are arranged at intervals in the circumferential direction of the yoke.

[0017] According to some embodiments of the present invention, the number of the tooth modules is 9-54.

[0018] According to some embodiments of the present invention, the yoke module is an amorphous metal part; and / or, the plurality of tooth modules are all amorphous metal parts.

[0019] According to some embodiments of the present invention, the plurality of tooth modules are all amorphous metal parts, and the yoke module is a crystalline metal part; or, the plurality of tooth modules are all crystalline metal parts, and the yoke module is an amorphous metal part.

[0020] According to some embodiments of the present invention, the core body includes at least one splicing module, the splicing module includes a plurality of stacked amorphous metal sheets, and the ratio of the thickness of the splicing module to the outer diameter of the stator core is 0.00019-0.00168.

[0021] According to some embodiments of the present invention, the stator core includes a tooth portion and a yoke portion, and a ratio of a width of the yoke portion to a length of the tooth portion is 0.95-1.52.

[0022] According to some embodiments of the present invention, the core body includes at least one splicing module, and the splicing module is formed by stamping.

[0023] According to a second aspect of the present invention, a motor comprises: the stator core according to the first aspect of the present invention.

[0024] According to the motor of the second aspect of the present invention, by providing the stator core according to the first aspect of the present invention, the efficiency of the motor can be improved and the yield rate in the production process can be improved.

[0025] According to a third aspect of the present invention, the vehicle comprises: the motor according to the second aspect of the present invention.

[0026] According to the vehicle of the third aspect of the present invention, the performance of the vehicle can be improved by providing the motor according to the second aspect of the present invention.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a core body according to an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 Schematic diagram of the splicing module shown in;

[0030] Figure 3 is a schematic diagram of an iron core body according to another embodiment of the present invention;

[0031] Figure 4 yes Figure 3 Schematic diagram of the yoke module and the tooth module shown in;

[0032] Figure 5 is a schematic diagram of a yoke module and a tooth module according to an embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of a splicing module according to another embodiment of the present invention;

[0034] Figure 7 yes Figure 6 Schematic diagram of the relative positions of the splicing modules during the production process shown in .

[0035] Reference numerals:

[0036] 100. Core body;

[0037] 10. Splicing module; 11. Tooth; 12. Yoke; 13. Avoidance groove; 14. Yoke module; 141. Connecting boss; 15. Tooth module; 151. Clamping part; 16. First edge; 17. Second edge. DETAILED DESCRIPTION

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0039] Reference below Figure 1-Figure 7 A stator core according to an embodiment of the first aspect of the present invention is described.

[0040] The stator core according to the first aspect of the present invention is used for a motor, and includes a core body 100, the cross section of the core body 100 is annular, the outer diameter of the core body 100 is R1, the inner diameter of the core body 100 is R2, R1-R2≤200mm, wherein the outer diameter is the maximum distance between the radial outer edge of the core body 100 and the central axis of the core body 100, the inner diameter is the minimum distance between the radial inner edge of the core body 100 and the central axis of the core body 100, and the core body 100 has a splicing seam formed by splicing. For example, R1-R2 can be 5mm, 10mm, 22mm, 50mm, 67mm, 90mm, 100mm, 176mm or 200mm.

[0041] The cross section of the core body 100 is perpendicular to the axis of the core body 100 , the core body 100 has a joint seam on the end face in the axial direction, and the cross section of the core body 100 also has a joint seam.

[0042] That is to say, the core body 100 is spliced ​​together by splicing modules, wherein the splicing modules 10 can be connected and spliced ​​in the circumferential direction to form the core body 100, and the splicing seams extend radially along the core body 100; the splicing modules 10 can also be connected and spliced ​​in the radial direction to form the core body 100, and the splicing seams extend circumferentially along the core body 100; or the splicing modules 10 can be connected and spliced ​​in both the circumferential and radial directions to form the core body 100, and the splicing seams extend circumferentially and radially along the core body 100.

[0043] It is understandable to those skilled in the art that the core body 100 includes a plurality of sheet-like monomers stacked in the axial direction. When the size of the core body 100 is large, the size of the sheet-like monomer is also large. In the process of producing the sheet-like monomer, the sheet-like monomer is usually formed by extending the raw material, or by rapidly cooling the liquid raw material on a roller to form the sheet-like monomer. When the size of the sheet-like monomer is large, the thickness consistency of the sheet-like monomer is large when the raw material is extended. In this way, when the sheet-like monomer is stacked to form the core body 100, the consistency of the core body 100 will be poor, affecting the yield rate of the core body 100. In the production process, it is found that when the width of the sheet-like monomer is less than 200 mm, the consistency of the sheet-like monomer is easy to control, especially when the amorphous metal material is used to manufacture the core body 100, when the width of the sheet-like amorphous metal strip is less than 200 mm, the consistency of the sheet-like monomer is high, which can meet the yield rate requirements of the core body 100.

[0044] Amorphous metal parts have lower hysteresis loss and eddy current loss, and higher magnetic permeability and saturation magnetic induction intensity. Using amorphous metal materials on the stator core can improve the efficiency of the motor.

[0045] During the production of sheet amorphous metal strips, the molten metal is rapidly cooled on rollers to obtain a metal strip with a thickness of less than 0.1 mm. The cooling rate is as high as 106°C / s to ensure that the metal is difficult to crystallize and form irregularly arranged atoms. In this process, the wider the amorphous metal strip, the more difficult it is to form.

[0046] In this embodiment, a splicing seam is provided on the core body 100, and the difference between the inner diameter and the outer diameter is less than or equal to 200 mm. The core body 100 is spliced ​​by splicing modules 10. During the production process, the width of the raw materials of the splicing modules 10 can be controlled within 200 mm, and the width of the sheet monomers of the splicing modules 10 can also be controlled within 200 mm, so that the consistency of the sheet monomers can meet the production needs of the core body 100 and improve the yield rate of the core body 100.

[0047] When the raw material of the splicing module 10 is an amorphous metal material, the width of the amorphous metal sheet used to produce the splicing module 10 can be controlled within 200 mm. The consistency of the amorphous metal sheet production process is high. Using the above-mentioned amorphous metal sheet to produce the splicing module 10 can improve the yield rate of the splicing module 10, thereby improving the yield rate of the stator core using amorphous metal materials.

[0048] Meanwhile, the size requirement of the core body 100 can be met by stacking the number of splicing modules 10. In the process of product design, the size of the core body 100 can be adjusted by adjusting the number of splicing modules 10, thereby reducing the difficulty of product design.

[0049] In addition, it is understandable that a smaller-sized splicing module 10 removes less raw material during the molding process, which can reduce material loss during the production process, thereby reducing production costs.

[0050] According to the stator core of the embodiment of the first aspect of the present invention, a splicing seam is set on the core body 100, and the difference between the inner diameter and the outer diameter is less than or equal to 200 mm. During the production process, the core body 100 can be formed by splicing smaller-sized splicing modules 10. On the one hand, the consistency of the smaller-sized splicing modules 10 is easy to control, which can improve the yield rate of the stator core. On the other hand, it can reduce material loss in the production process and reduce production costs. In addition, it can reduce the design difficulty of the stator core.

[0051] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the core body 100 includes a plurality of fan-shaped splicing modules 10, and the plurality of splicing modules 10 are spliced ​​in sequence along the circumferential direction, and a splicing seam is formed between two adjacent splicing modules 10. In this way, during the assembly process, the assembly process is relatively simple, which can reduce the assembly difficulty, and the material loss of a single splicing module 10 during the production process is less, which can reduce the production cost.

[0052] In some embodiments of the present invention, Figure 2 As shown, the radially innermost inner edge of the splicing module 10 is the first edge 16, and the radially outermost outer edge of the splicing module 10 is the second edge 17. In the radial direction, the distance between the first edge 16 and the second edge 17 is less than or equal to 200 mm. Thus, R1-R2≤200 mm can be achieved. In the production process, the first edge 16 and the second edge 17 are the two side edges in the width direction of the amorphous metal raw material for producing the splicing module 10, that is, the raw material is an arc-shaped amorphous metal strip. In this way, the width of the amorphous metal strip is not more than 200 mm, which can make the splicing module 10 have a higher yield rate.

[0053] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the splicing module 10 includes: a tooth portion 11 and a yoke portion 12, the tooth portion 11 extends in the radial direction of the stator core, the yoke portion 12 extends in the circumferential direction of the stator core, and the yoke portion 12 is connected to the inner end or the outer end of the tooth portion 11 in the radial direction of the stator core. In this way, in the splicing process, the two ends of the splicing module 10 can be assembled to realize the splicing of the stator core, thereby further reducing the difficulty of production.

[0054] In some embodiments of the present invention, Figure 2As shown, the splicing module 10 is formed by stamping, and the stamped splicing module 10 extends into an arc shape along the circumference of the stator core. Therefore, the splicing module 10 does not need to be processed during splicing, which can further reduce the difficulty of production.

[0055] In some embodiments of the present invention, the number of teeth 11 of the stator core is 36-96. For example, the number of teeth 11 can be 36, 48, 54, 72 or 96, thereby enabling the performance parameters of the stator core to meet the use requirements.

[0056] In some embodiments of the present invention, Figure 1 As shown, the center angle a between the two ends of the splicing module 10 in the circumferential direction is 45°-180°. For example, the center angle a between the two ends of the splicing module 10 in the circumferential direction can be 45°, 60°, 120°, 135°, 170° or 180°, thereby making the performance parameters of the splicing module 10 meet the use requirements. In the process of product design, the center angle a between the two ends of the splicing module 10 in the circumferential direction can be adjusted to meet more product design requirements.

[0057] In some embodiments of the present invention, at least a portion of the structure of at least one of the multiple splicing modules 10 is an amorphous metal part. That is, one of the multiple splicing modules 10 may contain an amorphous metal part, or multiple of the multiple splicing modules 10 may contain an amorphous metal part, or all of the multiple splicing modules 10 may contain an amorphous metal part, wherein when the splicing module 10 contains an amorphous metal part, a portion of the splicing module 10 may be an amorphous metal part, or all of the splicing modules 10 may be amorphous metal parts.

[0058] When amorphous metal parts are arranged at different positions of the core body 100, the performance of the core body 100 at that position can be changed. During product design, the material composition of the splicing module 10 can be selected according to product design requirements to meet more product design requirements.

[0059] In some embodiments of the present invention, multiple splicing modules 10 are all amorphous metal parts. It can be understood that multiple splicing modules 10 are connected end to end in the circumferential direction of the core body 100 to enclose the core body 100, and the splicing modules 10 include: a tooth portion 11 and a yoke portion 12. The material of each splicing module 10 needs to be consistent. In this way, during the operation of the stator core, the consistent performance parameters of each module can enable the stator core to work normally, thereby enabling the motor to work normally.

[0060] In some embodiments of the present invention, Figure 1 and Figure 6As shown, the core body 100 includes at least one splicing module 10. The splicing module 10 is in a strip shape before splicing. The splicing module 10 is bent into an arc or ring shape during splicing to form the core body 100. The width of the splicing module 10 before splicing is less than or equal to 200 mm.

[0061] When the core body 100 includes one splicing module 10, the splicing seam is formed between the two ends of the bent splicing module 10 in the circumferential direction. When the core body 100 includes multiple splicing modules 10, the splicing seam is formed between the ends of two adjacent splicing modules 10 in the circumferential direction of the core body 100.

[0062] Among them, when the core body 100 includes multiple splicing modules 10, the splicing module 10 is bent into an arc shape, and the core body 100 is spliced ​​by multiple splicing modules 10. When the core body 100 includes one splicing module 10, the splicing module 10 is bent into a ring shape, and the core body 100 is spliced ​​by connecting the two ends of a splicing module 10.

[0063] Specifically, there are multiple connected monomer groups in the length direction of the splicing module 10, each monomer group includes a connected tooth portion 11 and a yoke portion 12, and an avoidance groove 13 is provided between adjacent monomers. When splicing, the splicing module 10 is bent toward the center of the stator core, so that the inner walls on both sides of the avoidance groove 13 fit together, and multiple splicing modules 10 are connected end to end, thereby realizing the splicing of multiple splicing modules 10. Compared with the arc-shaped splicing module 10 formed by stamping, the splicing module 10 is formed into an arc or ring shape after bending the strip shape, and the inner walls on both sides of the avoidance groove 13 fit together to form a splicing seam of the avoidance groove 13 on the axial end face of the splicing module 10.

[0064] Between the bends, the distance between two connected teeth 11 is relatively large. Thus, winding is performed on the teeth 11 before assembly, which can reduce the difficulty of winding, thereby improving the winding efficiency and the slot fill rate.

[0065] Among them, the width of the splicing module before splicing is less than or equal to 200 mm, and the width of the amorphous metal strip raw material of the strip-shaped splicing module 10 is also less than or equal to 200 mm. The consistency of the amorphous metal strip raw material during the production process is high, which can improve the yield rate of the core body 100, and the two side edges of the amorphous metal strip raw material in the width direction can be parallel. During the production process, the amorphous metal strip forming process is easier to control, thereby reducing the production difficulty of the amorphous metal strip raw material, and then reducing the production difficulty of the splicing module.

[0066] Preferably, the strip-shaped splicing module 10 is formed by stamping. During the production process, a single strip-shaped splicing module 10 can be stamped out at one time. Figure 7As shown, two strip-shaped splicing modules 10 can also be punched out at one time, and the teeth 11 of the two strip-shaped splicing modules 10 are respectively placed in the area of ​​each other's groove. In this way, the materials punched out of the two strip-shaped splicing modules 10 can overlap, thereby reducing material loss and reducing production costs.

[0067] In some embodiments of the present invention, Figure 3 As shown, the core body 100 includes at least one splicing module 10, and the splicing module 10 includes a yoke module 14 and a tooth module 15. At least one yoke module 14 is spliced ​​to form the yoke 12 of the core body 100. There are multiple tooth modules 15, and the multiple tooth modules 15 are connected to one side of the yoke module 14 in the radial direction of the yoke and are arranged at intervals in the circumferential direction of the yoke.

[0068] In this way, during the production process, the winding can be carried out before the tooth module 15 is assembled on the yoke module 14, and there is less obstruction during the winding. In this way, on the one hand, the difficulty of winding can be reduced and the efficiency of winding can be improved. On the other hand, more windings can be wound on the tooth module 15, thereby improving the slot fill rate.

[0069] In some embodiments of the present invention, Figure 3-Figure 5 As shown, a slot is formed on one of the yoke module 14 and the tooth module 15, and a clamping portion 151 is formed on the other, and the clamping portion 151 is engaged in the slot. The clamping connection operation is convenient, which can further reduce the difficulty of operation, and the slot and the clamping portion 151 can be positioned together to improve the position accuracy of the tooth 11 on the stator core.

[0070] In some embodiments of the present invention, Figure 3-Figure 5 As shown, the slot has an opening and a bottom wall arranged oppositely in the radial direction of the yoke module 14, and the width of the opening increases in the direction from the opening to the bottom wall, or, in the direction from the opening to the bottom wall, the width of at least part of the slot in the circumferential direction of the yoke module 14 is greater than the width of the opening. The shape of the retaining portion 151 is adapted to the shape of the slot, so that when the retaining portion 151 is displaced from the opening, the inner wall of the slot can abut against the retaining portion 151, thereby preventing the retaining portion 151 from being disengaged from the slot, thereby improving the reliability of the connection between the tooth module 15 and the yoke module 14.

[0071] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the slot is formed by radially concavely extending along the inner or outer circumference of the yoke module 14, and one end of the tooth module 15 is formed as a clamping portion 151 and fits into the slot. It can be understood that the size of the yoke module 14 is relatively large, and in the process of opening the slot, it is convenient to fix and operate the yoke module 14, thereby further reducing the difficulty of production.

[0072] In some embodiments of the present invention, Figure 3 and Figure 5 As shown, the yoke module 14 includes a yoke body and a connecting boss 141. The yoke body is annular, and there are multiple connecting bosses 141, which correspond to the tooth modules 15 one by one. The connecting boss 141 is connected to the inner side or the outer side of the yoke body and extends along the radial direction of the yoke body. The slot is formed by a concave edge of the connecting boss 141 away from the yoke body. In this way, after the assembly is completed, the connecting boss 141 and the tooth module 15 together form the tooth 11. It can be understood by those skilled in the art that winding is performed on the tooth 11, and the winding can fix the connecting boss 141 and the tooth module 15, thereby improving the stability of the connection between the tooth module 15 and the yoke module 14.

[0073] In some embodiments of the present invention, the number of tooth modules 15 is 9-54. For example, the number of tooth modules 15 can be 9, 12, 15, 18, 36, 48 or 54. In this way, the performance parameters of the stator core can meet the use requirements.

[0074] In some embodiments of the present invention, the yoke module 14 is an amorphous metal part; and / or the plurality of tooth modules 15 are all amorphous metal parts.

[0075] That is to say, the yoke module 14 may be an amorphous metal part, the plurality of tooth modules 15 may all be amorphous metal parts, or the yoke module 14 and the plurality of tooth modules 15 may all be amorphous metal parts.

[0076] During the product design process, the materials of the yoke module 14 and the tooth module 15 can be selected according to usage requirements. For example, compared with silicon steel materials, the saturation magnetic density of amorphous metal materials is about 20% lower. In the motor, the saturation magnetic induction intensity of the tooth 11 is higher than that of the yoke 12. In order to increase the output torque of the motor, the yoke module 14 can be set to an amorphous metal part, and the tooth module 15 can be set to a silicon steel material part.

[0077] For another example, during the production process, in order to improve the yield rate and reduce the difficulty of production, the smaller tooth module 15 can be set as an amorphous metal part, and the larger yoke module 14 can be set as a silicon steel material part.

[0078] For another example, in order to maximize the efficiency of the motor, the tooth module 15 and the yoke module 14 may both be configured as amorphous metal parts.

[0079] In some embodiments of the present invention, the plurality of tooth modules 15 are all amorphous metal parts, and the yoke module 14 is a crystalline metal part; or, the plurality of tooth modules 15 are all crystalline metal parts, and the yoke module 14 is an amorphous metal part. In the process of product design, the materials of the tooth module 15 and the yoke module 14 can be selected according to the product design requirements.

[0080] In some embodiments of the present invention, the core body 100 includes at least one splicing module 10, the splicing module 10 includes a plurality of stacked amorphous metal sheets, and the ratio of the thickness of the splicing module 10 to the outer diameter of the stator core is 0.00019-0.00168. For example, the ratio of the thickness of the splicing module 10 to the outer diameter of the stator core can be 0.00019, 0.00035, 0.00093, 0.0015 or 0.00168, thereby enabling the performance parameters of the stator core to meet the use requirements.

[0081] In some embodiments of the present invention, the stator core includes a tooth portion 11 and a yoke portion 12, and the ratio of the width of the yoke portion 12 to the length of the tooth portion 11 is 0.95-1.52. For example, the ratio of the width of the yoke portion 12 to the length of the tooth portion 11 can be 0.95, 0.99, 1.0, 1.12, 1.47 or 1.52, thereby enabling the performance parameters of the stator core to meet the use requirements.

[0082] In some embodiments of the present invention, the core body 100 includes at least one splicing module 10, and the splicing module 10 is formed by stamping. Stamping is easy to operate, can improve production efficiency, and has high product consistency.

[0083] The motor according to the second embodiment of the present invention includes: the stator core according to the first embodiment of the present invention.

[0084] According to the motor of the second aspect of the present invention, by providing the stator core according to the first aspect of the present invention, the efficiency of the motor can be improved and the yield rate in the production process can be improved.

[0085] A vehicle according to an embodiment of a third aspect of the present invention comprises: the motor according to the embodiment of the second aspect of the present invention.

[0086] The vehicle according to the third aspect of the present invention can improve the performance of the vehicle by providing the motor according to the second aspect of the present invention.

[0087] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0088] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator core for a motor, characterized in that: It includes an iron core body, the cross-section of the iron core body is annular, the outer diameter of the iron core body is R1, the inner diameter of the iron core body is R2, R1-R2≤200mm, wherein the outer diameter is the maximum distance between the radial outer edge of the iron core body and the central axis of the iron core body, the inner diameter is the minimum distance between the radial inner edge of the iron core body and the central axis of the iron core body, and the iron core body has a splicing seam formed by splicing.

2. The stator core according to claim 1, characterized in that: The core body includes a plurality of fan-shaped splicing modules, and the plurality of splicing modules are spliced ​​in sequence along the circumferential direction, and a splicing seam is formed between two adjacent splicing modules.

3. The stator core according to claim 2, characterized in that: The radially innermost inner edge of the splicing module is a first edge, and the radially outermost outer edge of the splicing module is a second edge. In the radial direction, the distance between the first edge and the second edge is less than or equal to 200 mm.

4. The stator core according to claim 2, characterized in that: The splicing module includes: a tooth portion and a yoke portion, wherein the yoke portion extends along the circumferential direction of the stator core, and the tooth portion is connected to an inner end or an outer end of the yoke portion in the radial direction of the stator core.

5. The stator core according to claim 4, characterized in that: The number of the teeth of the stator core is 36-96.

6. The stator core according to claim 2, characterized in that: The central angle between the two ends of the splicing module in the circumferential direction is 45°-180°.

7. The stator core according to any one of claims 2 to 6, characterized in that: At least a portion of the structure of at least one of the plurality of splicing modules is an amorphous metal part.

8. The stator core according to any one of claims 2 to 6, characterized in that: The plurality of splicing modules are all amorphous metal parts.

9. The stator core according to claim 1, characterized in that: The core body includes at least one splicing module, the splicing module is in a strip shape before splicing, the splicing module is bent into an arc or ring shape during splicing to form the core body, and the width of the splicing module before splicing is less than or equal to 200 mm. When the core body includes one splicing module, the splicing seam is formed between two ends of the splicing module in the circumferential direction after bending. When the core body includes a plurality of the splicing modules, the splicing seam is formed between the ends of two adjacent splicing modules in the circumferential direction of the core body.

10. The stator core according to claim 1, characterized in that: The core body includes at least one splicing module, and the splicing module includes a yoke module and a tooth module. At least one yoke module is spliced ​​to form the yoke of the core body. There are multiple tooth modules, and the multiple tooth modules are connected to the yoke module on one side of the yoke in the radial direction, and are arranged at intervals in the circumferential direction of the yoke.

11. The stator core according to claim 10, characterized in that: The number of the tooth modules is 9-54.

12. The stator core according to claim 10, characterized in that: The yoke module is an amorphous metal part; and / or, the plurality of tooth modules are all amorphous metal parts.

13. The stator core according to claim 10, characterized in that: The plurality of tooth modules are all amorphous metal parts, and the yoke module is a crystalline metal part; or, The plurality of tooth modules are all crystalline metal parts, and the yoke module is an amorphous metal part.

14. The stator core according to claim 1, characterized in that: The core body includes at least one splicing module, and the splicing module includes a plurality of stacked amorphous metal sheets. The ratio of the thickness of the splicing module to the outer diameter of the stator core is 0.00019-0.00168.

15. The stator core according to claim 1, characterized in that: The stator core comprises a tooth portion and a yoke portion, and a ratio of a width of the yoke portion to a length of the tooth portion is 0.95-1.

52.

16. The stator core according to claim 1, characterized in that: The core body includes at least one splicing module, and the splicing module is formed by stamping.

17. A motor, characterized in that: include: The stator core according to any one of claims 1 to 16.

18. A vehicle, characterized in that: include: The motor of claim 17.

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