Stator core, electric machine and vehicle

Abstract

The application discloses a kind of stator core, motor and vehicle, the stator includes core body, the core body includes splicing module, the splicing module includes: tooth module and yoke module, the yoke module extends along the circumference of the stator, the tooth module is connected in the inner end or outer end of the yoke module in the radial direction of the stator core, the tooth module is amorphous metal piece, the yoke module is crystalline metal piece.According to the stator core of the application, the material of yoke module and tooth module can be selected according to the need, for example, compared with silicon steel material, the saturation magnetic flux density of amorphous metal material is about 20% lower, and the saturation magnetic induction intensity of tooth in motor is higher than that of yoke, to improve the output torque of motor.

Description

[0001] This application is a divisional application of Chinese patent application filed on December 13, 2024, with application number 202411852489.5 and the invention title "Stator Core, Motor and Vehicle". Technical Field

[0002] This invention relates to the field of electric motor technology, and in particular to a stator core, an electric motor, and a vehicle. Background Technology

[0003] The stator core of an electric motor guides the magnetic field during motor operation. Therefore, the consistency of each part of the stator core is required to be high. In related technologies, the output torque of the motor is relatively low. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a stator core capable of increasing the output torque of a motor.

[0005] The present invention also proposes a motor having the above-mentioned stator core.

[0006] The present invention also proposes a vehicle having the above-mentioned motor.

[0007] According to a first aspect of the present invention, a stator core for an electric motor includes a core body, the core body including a splicing module, the splicing module including a tooth module and a yoke module, the yoke module extending circumferentially along the stator, the tooth module being connected to the inner or outer end of the yoke module in the radial direction of the stator core, the tooth module being an amorphous metal component, and the yoke module being a crystalline metal component.

[0008] According to the first aspect of the present invention, the materials of the yoke module and the tooth module can be selected according to the needs of use. For example, compared with silicon steel, the saturation magnetic density of amorphous metal materials is about 20% lower. In the motor, the saturation magnetic induction intensity of the tooth is higher than that of the yoke, so as to improve the output torque of the motor.

[0009] According to some embodiments of the present invention, the number of tooth modules is 36-96, or the number of tooth modules is 9-54.

[0010] According to some embodiments of the present invention, the ratio of the width of the yoke module to the length of the tooth module is 0.95-1.52.

[0011] According to some embodiments of the present invention, there are multiple tooth modules, and the multiple teeth are connected to one side of the yoke module in the radial direction and are arranged at circumferential intervals in the yoke module.

[0012] According to some embodiments of the present invention, one of the yoke module and the tooth module has a slot and the other has a retaining part, the retaining part engaging within the slot.

[0013] According to some embodiments of the present invention, the yoke module has the slot, and the tooth module has the retaining portion.

[0014] According to some embodiments of the present invention, the slot has an opening and a bottom wall opposite each other in the radial direction of the yoke module, wherein the width of the opening increases in the direction of the opening toward the bottom wall.

[0015] According to some embodiments of the present invention, in the direction of the opening toward the bottom wall, at least a portion of the slot has a width greater than the width of the opening in the circumferential direction of the yoke module.

[0016] According to some embodiments of the present invention, the slot is formed by a radial recess along the inner or outer periphery of the yoke module.

[0017] According to some embodiments of the present invention, there are multiple tooth modules, and the multiple teeth are connected to one side of the yoke module in the radial direction and are arranged at circumferential intervals in the yoke module; the yoke module includes a yoke body and a connecting boss, the yoke body is annular, there are multiple connecting bosses and each corresponds to a tooth module, the connecting boss is connected to the inner or outer side of the yoke body and extends radially along the yoke body, and the slot is formed by recessing the edge of the connecting boss away from the yoke body.

[0018] According to some embodiments of the present invention, 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, and R1-R2≤200mm. The outer diameter is the maximum distance between the radial outer edge of the core body and the central axis of the core body, and the inner diameter is the minimum distance between the radial inner edge of the core body and the central axis of the core body. The core body has a splicing seam formed by splicing, and the splicing seam is formed in the tooth module and the yoke module.

[0019] According to a second aspect of the present invention, an electric motor includes: the stator core described above according to the first aspect of the present invention.

[0020] According to the second aspect of the present invention, by providing the stator core described above 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 increased.

[0021] According to a third aspect of the present invention, the vehicle includes: the motor described above according to the second aspect of the present invention.

[0022] According to a third aspect of the present invention, the vehicle's performance can be improved by providing the motor described above according to the second aspect of the present invention.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the iron core body according to an embodiment of the present invention;

[0025] Figure 2 yes Figure 1 The diagram shows the splicing module;

[0026] Figure 3 This is a schematic diagram of the core body according to another embodiment of the present invention;

[0027] Figure 4 yes Figure 3 A schematic diagram of the yoke module and the tooth module shown;

[0028] Figure 5 This is a schematic diagram of the yoke module and the tooth module according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of a splicing module according to another embodiment of the present invention;

[0030] Figure 7 yes Figure 6 The diagram shows the relative positions of the splicing modules during the production process.

[0031] Figure label:

[0032] 100. Iron core body;

[0033] 10. Splicing module; 11. Tooth; 12. Yoke; 13. Clearance groove; 14. Yoke module; 141. Connecting boss; 15. Tooth module; 151. Holding part; 16. First edge; 17. Second edge. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0035] The following is for reference. Figures 1-7 A stator core according to an embodiment of the first aspect of the present invention is described.

[0036] According to a first aspect of the present invention, a stator core for an electric motor includes a core body 100, the core body 100 having an annular cross-section, an outer diameter R1, an inner diameter R2, and R1-R2 ≤ 200 mm. The outer diameter is the maximum distance between the radial outer edge of the core body 100 and its central axis, and the inner diameter is the minimum distance between the radial inner edge of the core body 100 and its central axis. The core body 100 has splicing seams formed by joining. For example, R1-R2 can be 5 mm, 10 mm, 22 mm, 50 mm, 67 mm, 90 mm, 100 mm, 176 mm, or 200 mm.

[0037] The cross-section of the core body 100 is perpendicular to the axis of the core body 100. The core body 100 has a splicing seam on its axial end face and a splicing seam on its cross-section.

[0038] In other words, the core body 100 is assembled from splicing modules. Specifically, the splicing modules 10 can be connected circumferentially to form the core body 100, with the splicing seam extending radially along the core body 100; or the splicing modules 10 can be connected radially to form the core body 100, with the splicing seam extending circumferentially along the core body 100; or the splicing modules 10 can be connected both circumferentially and radially to form the core body 100, with the splicing seam extending both circumferentially and radially along the core body 100.

[0039] As will be understood by those skilled in the art, the core body 100 comprises multiple sheet-like monomers stacked axially. When the core body 100 is large, the sheet-like monomers are also large. In the production of these sheet-like monomers, they are typically formed by stretching raw materials or by rapidly cooling liquid raw materials on rollers. When the sheet-like monomers are large, the thickness uniformity is high during the stretching process. Therefore, when using stacked sheet-like monomers to form the core body 100, the uniformity of the core body 100 is poor, affecting its yield. During production, it was found that when the width of the sheet-like monomers is less than 200 mm, the uniformity is easier to control. This is especially true when using amorphous metal materials to manufacture the core body 100; when the width of the amorphous metal sheet strips is less than 200 mm, the uniformity of the sheet-like monomers is high, meeting the yield requirements of the core body 100.

[0040] Amorphous metal components have lower hysteresis and eddy current losses, as well as higher permeability and saturation magnetic induction. Using amorphous metal materials in the stator core can improve the efficiency of the motor.

[0041] In the production of sheet-like amorphous metal strips, molten metal is rapidly cooled on rollers to obtain metal strips with a thickness of less than 0.1 mm. The cooling rate is as high as 106℃ / 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.

[0042] In this embodiment, the core body 100 is provided with splicing seams, and the difference between the inner diameter and the outer diameter is less than or equal to 200mm. The core body 100 is spliced ​​from splicing modules 10. During the production process, the width of the raw materials of the splicing modules 10 can be controlled within 200mm, and the width of the sheet-like units of the splicing modules 10 can also be controlled within 200mm. This allows the consistency of the sheet-like units to meet the production needs of the core body 100 and improves the yield of the core body 100.

[0043] When the raw material of the splicing module 10 is amorphous metal material, the width of the amorphous metal sheet used to produce the splicing module 10 can be controlled within 200mm. 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 of the splicing module 10, thereby improving the yield of the stator core using amorphous metal material.

[0044] Meanwhile, by stacking the splicing modules 10, the size requirements of the iron core body 100 can be met. During the product design process, the size of the iron core body 100 can be adjusted by changing the number of splicing modules 10, thereby reducing the difficulty of product design.

[0045] In addition, it is understandable that the smaller splicing module 10 requires less raw material to be removed during the molding process, which can reduce material loss during production and thus reduce production costs.

[0046] According to the first aspect of the present invention, the stator core is formed by splicing seams on the core body 100 and making the difference between the inner diameter and the outer diameter less than or equal to 200 mm. During the production process, the core body 100 can be formed by splicing smaller splicing modules 10. On the one hand, the consistency of the smaller splicing modules 10 is easier to control, which can improve the yield of the stator core. On the other hand, it can reduce material loss during the production process and reduce production costs. In addition, it can reduce the design difficulty of the stator core.

[0047] In some embodiments of the present invention, such as Figure 1 and Figure 2As shown, the iron core body 100 includes multiple fan-shaped splicing modules 10, which are sequentially spliced ​​together along the circumference, with splicing seams forming between adjacent splicing modules 10. This simplifies the assembly process, reduces assembly difficulty, and minimizes material loss per splicing module 10 during production, thus lowering production costs.

[0048] In some embodiments of the present invention, such as Figure 2 As shown, the innermost radial edge of the splicing module 10 is the first edge 16, and the outermost radial 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 200mm. Therefore, R1-R2≤200mm can be achieved. During the production process, the first edge 16 and the second edge 17 are the two edges in the width direction of the amorphous metal raw material used to produce the splicing module 10, i.e., the raw material is an arc-shaped amorphous metal strip. Thus, the width of the amorphous metal strip is no greater than 200mm, which can result in a higher yield rate for the splicing module 10.

[0049] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the splicing module 10 includes a toothed portion 11 and a yoke portion 12. The toothed portion 11 extends radially along the stator core, and the yoke portion 12 extends circumferentially along the stator core. The yoke portion 12 is connected to the inner or outer end of the toothed portion 11 in the radial direction of the stator core. Thus, during the splicing process, the stator core can be spliced ​​simply by assembling both ends of the splicing module 10, thereby further reducing production difficulty.

[0050] In some embodiments of the present invention, such as Figure 2 As shown, the splicing module 10 is stamped, and the stamped splicing module 10 extends into an arc shape along the circumference of the stator core. Therefore, splicing can be performed without processing the splicing module 10, thereby further reducing the production difficulty.

[0051] In some embodiments of the present invention, the number of teeth 11 in 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 usage requirements.

[0052] In some embodiments of the present invention, such as Figure 1As shown, the central angle α between the two ends of the splicing module 10 in the circumferential direction is 45°-180°. For example, the central angle α between the two ends of the splicing module 10 in the circumferential direction can be 45°, 60°, 120°, 135°, 170°, or 180°, thereby ensuring that the performance parameters of the splicing module 10 meet the usage requirements. During the product design process, the central angle α between the two ends of the splicing module 10 in the circumferential direction can be adjusted to meet more product design needs.

[0053] In some embodiments of the present invention, at least a portion of the structure of at least one of the plurality of splicing modules 10 is an amorphous metal component. That is, one of the plurality of splicing modules 10 may contain an amorphous metal component, or multiple splicing modules 10 may contain amorphous metal components, or all of the plurality of splicing modules 10 may contain amorphous metal components. When a splicing module 10 contains amorphous metal components, a portion of the splicing module 10 may be amorphous metal components, or all of the splicing module 10 may be amorphous metal components.

[0054] When amorphous metal parts are placed in different parts of the core body 100, the performance of the core body 100 in that part can be changed. During the product design process, the material composition of the splicing module 10 can be selected according to the product design requirements, thereby meeting more product design needs.

[0055] In some embodiments of the present invention, multiple splicing modules 10 are all amorphous metal parts. It is 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 each splicing module 10 includes a toothed 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 ensure that the stator core can operate normally, thereby enabling the motor to operate normally.

[0056] In some embodiments of the present invention, such as Figure 1 and Figure 6 As shown, the iron core body 100 includes at least one splicing module 10. Before splicing, the splicing module 10 is strip-shaped. During splicing, the splicing module 10 is bent into an arc or ring shape to form the iron core body 100. The width of the splicing module 10 before splicing is less than or equal to 200mm.

[0057] 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.

[0058] When the iron core body 100 includes multiple splicing modules 10, the splicing modules 10 are bent into an arc shape, and the iron core body 100 is spliced ​​together from multiple splicing modules 10. When the iron core body 100 includes one splicing module 10, the splicing module 10 is bent into a ring shape, and the iron core body 100 is spliced ​​together from the two ends of one splicing module 10.

[0059] Specifically, along the length of the splicing module 10, there are multiple connected unit groups. Each unit group includes a connected tooth 11 and a yoke 12. A clearance groove 13 is provided between adjacent units. During splicing, the splicing module 10 is bent towards the center of the stator core, causing the inner walls of the clearance groove 13 to fit together, and connecting multiple splicing modules 10 end-to-end, thus achieving the splicing of multiple splicing modules 10. Compared to the stamped arc-shaped splicing module 10, the splicing module 10 is formed by bending a strip into an arc or ring shape. The fitting of the inner walls of the clearance groove 13 creates a splicing seam on the axial end face of the splicing module 10.

[0060] Between the bends, the spacing between the two connected teeth 11 is relatively large. This allows for winding on the teeth 11 before assembly, which reduces the difficulty of winding, thereby improving winding efficiency and slot fill factor.

[0061] Among them, the width of the splicing module before splicing is less than or equal to 200mm, and the width of the amorphous metal strip raw material of the strip-shaped splicing module 10 is also less than or equal to 200mm. The amorphous metal strip raw material has high consistency in the production process, which can improve the yield of the iron core body 100. In addition, the two sides of the amorphous metal strip raw material in the width direction can be parallel. In 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 thus reducing the production difficulty of the splicing module.

[0062] Preferably, the strip-shaped splicing module 10 is formed by stamping, and during the production process, a single strip-shaped splicing module 10 can be stamped out in one go, such as... Figure 7 As shown, two strip-shaped splicing modules 10 can also be stamped out at one time. The teeth 11 of the two strip-shaped splicing modules 10 are placed in the area of ​​the opposite groove. In this way, the material stamped out by the two strip-shaped splicing modules 10 can overlap, thereby reducing material loss and reducing production costs.

[0063] In some embodiments of the present invention, such as Figure 3As shown, the core body 100 includes at least one splicing module 10. The splicing module 10 includes a yoke module 14 and a toothed module 15. At least one yoke module 14 is spliced ​​to form the yoke 12 of the core body 100. There are multiple toothed modules 15. Multiple toothed 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.

[0064] In this way, during the production process, the winding can be carried out before the tooth module 15 is assembled onto the yoke module 14, resulting in less obstruction during winding. This reduces the difficulty of winding and improves winding efficiency. Furthermore, more windings can be wound onto the tooth module 15, thereby increasing the slot fill factor.

[0065] In some embodiments of the present invention, such as Figures 3-5 As shown, one of the yoke module 14 and the tooth module 15 has a slot, and the other has a retaining part 151, which fits into the slot. The snap-fit ​​connection is convenient and can further reduce the difficulty of operation. In addition, the slot and the retaining part 151 can be used for positioning, improving the positional accuracy of the tooth 11 on the stator core.

[0066] In some embodiments of the present invention, such as Figures 3-5 As shown, the slot has an opening and a bottom wall arranged radially opposite to each other in the yoke module 14. The width of the opening increases in the direction facing the bottom wall, or, in the direction facing the bottom wall, at least a portion of the slot has a circumferential width greater than the width of the opening in the yoke module 14. The retaining portion 151 is adapted to the shape of the slot, such that when the retaining portion 151 displaces from the opening, the inner wall of the slot can abut against the retaining portion 151, thereby preventing the retaining portion 151 from disengaging from the slot. This improves the reliability of the connection between the tooth module 15 and the yoke module 14.

[0067] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the slot is formed by a radial indentation along the inner or outer periphery of the yoke module 14, and one end of the tooth module 15 is formed as a retaining part 151 and fits into the slot. It is understood that the yoke module 14 is relatively large, which facilitates the fixing and operation of the yoke module 14 during the slot-making process, thereby further reducing the production difficulty.

[0068] In some embodiments of the present invention, such as Figure 3 and Figure 5As shown, the yoke module 14 includes a yoke body and connecting bosses 141. The yoke body is annular, and there are multiple connecting bosses 141, each corresponding to a tooth module 15. The connecting bosses 141 are connected to the inner or outer side of the yoke body and extend radially along the yoke body. A slot is formed by recessing the edge of the connecting boss 141 away from the yoke body. Thus, after assembly, the connecting bosses 141 and the tooth modules 15 together form the tooth section 11. As those skilled in the art will understand, windings are made on the tooth section 11, which can fix the connecting bosses 141 and the tooth modules 15, thereby improving the stability of the connection between the tooth modules 15 and the yoke module 14.

[0069] 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. This allows the performance parameters of the stator core to meet the usage requirements.

[0070] In some embodiments of the present invention, the yoke module 14 is an amorphous metal component; and / or, the plurality of tooth modules 15 are all amorphous metal components.

[0071] In other words, the yoke module 14 can be an amorphous metal part, or all the tooth modules 15 can be amorphous metal parts, or both the yoke module 14 and the tooth modules 15 can be amorphous metal parts.

[0072] During the product design process, the materials of the yoke module 14 and the tooth module 15 can be selected according to the usage requirements. For example, compared with silicon steel, the saturation magnetic density of amorphous metal 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 improve the output torque of the motor, the yoke module 14 can be set as an amorphous metal part and the tooth module 15 can be set as a silicon steel part.

[0073] For example, in order to improve the yield rate and reduce the production difficulty during the production process, 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 part.

[0074] For example, in order to maximize the efficiency of the motor, both the tooth module 15 and the yoke module 14 can be made of amorphous metal.

[0075] In some embodiments of the present invention, the toothed modules 15 are all amorphous metal parts, and the yoke module 14 is a crystalline metal part; or, the toothed modules 15 are all crystalline metal parts, and the yoke module 14 is an amorphous metal part. During product design, the materials of the toothed modules 15 and the yoke module 14 can be selected according to product design requirements.

[0076] In some embodiments of the present invention, the core body 100 includes at least one splicing module 10, which comprises a plurality of stacked amorphous metal sheets. 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 ensuring that the performance parameters of the stator core meet the usage requirements.

[0077] In some embodiments of the present invention, the stator core includes a toothed portion 11 and a yoke portion 12, wherein the ratio of the width of the yoke portion 12 to the length of the toothed portion 11 is 0.95-1.52. For example, the ratio of the width of the yoke portion 12 to the length of the toothed portion 11 can be 0.95, 0.99, 1.0, 1.12, 1.47, or 1.52, thereby ensuring that the performance parameters of the stator core meet the usage requirements.

[0078] In some embodiments of the present invention, the core body 100 includes at least one splicing module 10, which is formed by stamping. Stamping is a convenient operation, which can improve production efficiency and result in high product consistency.

[0079] An electric motor according to a second aspect of the present invention includes: a stator core according to a first aspect of the present invention.

[0080] According to a second aspect embodiment of the present invention, by providing the stator core described above according to a first aspect embodiment of the present invention, the efficiency of the motor can be improved and the yield rate in the production process can be increased.

[0081] A vehicle according to a third aspect of the present invention includes: the motor described in the second aspect of the present invention.

[0082] According to a third aspect embodiment of the present invention, the vehicle's performance can be improved by providing the motor described above according to a second aspect embodiment of the present invention.

[0083] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0085] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0087] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator core for use in an electric motor, characterized in that, The stator includes a core body, which includes a splicing module. The splicing module includes a toothed module and a yoke module. The yoke module extends circumferentially along the stator. The toothed module is connected to the inner or outer end of the yoke module in the radial direction of the stator core. The toothed module is an amorphous metal component, and the yoke module is a crystalline metal component.

2. The stator core according to claim 1, characterized in that, The number of tooth modules is 36-96, or the number of tooth modules is 9-54.

3. The stator core according to claim 1, characterized in that, The ratio of the width of the yoke module to the length of the tooth module is 0.95-1.

52.

4. The stator core according to claim 1, characterized in that, The number of toothed modules is multiple, and the multiple teeth are connected to one side of the yoke module in the radial direction and are arranged at circumferential intervals in the yoke module.

5. The stator core according to claim 1, characterized in that, One of the yoke module and the tooth module has a slot and the other has a retaining part, which engages within the slot.

6. The stator core according to claim 5, characterized in that, The yoke module has the slot, and the tooth module has the retaining part.

7. The stator core according to claim 6, characterized in that, The slot has an opening and a bottom wall that are radially opposite to each other on the yoke module, and the width of the opening increases in the direction of the opening toward the bottom wall.

8. The stator core according to claim 6, characterized in that, In the direction of the opening toward the bottom wall, at least a portion of the slot has a width greater than the width of the opening in the circumferential direction of the yoke module.

9. The stator core according to claim 6, characterized in that, The slot is formed by a radial indentation along the inner or outer periphery of the yoke module.

10. The stator core according to claim 5, characterized in that, The number of tooth modules is multiple, and the multiple teeth are connected to one side of the yoke module in the radial direction and are arranged at intervals in the circumferential direction of the yoke module; The yoke module includes a yoke body and connecting bosses. The yoke body is annular. There are multiple connecting bosses, each corresponding to a tooth module. The connecting bosses are connected to the inner or outer side of the yoke body and extend radially along the yoke body. The slot is formed by recessing the connecting boss on the side edge away from the yoke body.

11. The stator core according to claim 1, characterized in that, 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, and R1-R2≤200mm. The outer diameter is the maximum distance between the radial outer edge of the core body and the central axis of the core body, and the inner diameter is the minimum distance between the radial inner edge of the core body and the central axis of the core body. The core body has a splicing seam formed by splicing, which is formed in the tooth module and the yoke module.

12. The stator core according to claim 1, characterized in that, The core body 100 includes at least one splicing module 10, which includes a plurality of stacked amorphous metal sheets. The ratio of the thickness of the splicing module 10 to the outer diameter of the stator core is 0.00019-0.00168.

13. An electric motor, characterized in that, include: The stator core according to any one of claims 1-16.

14. A vehicle, characterized in that, include: The motor according to claim 17.

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