Stator assembly and motor

Abstract

The present invention discloses a stator assembly and a motor, and relates to the technical field of motors. The stator assembly includes: a yoke, which is annular; a tooth portion, which is a separate processed part and a plurality of teeth spaced apart along the circumferential direction of the yoke. The tooth portion includes a tooth root section and a tooth body, and the tooth body is located on the radial inner side of the yoke. The tooth root section is embedded in the yoke. The dimension of the tooth root section along the circumferential direction of the yoke is a, and the dimension of the tooth body along the circumferential direction of the yoke is b, wherein a≤b. According to the stator assembly of the present invention, the winding difficulty of the winding is greatly reduced, which is convenient for winding machines or manual winding, reduces the difficulty of assembly, improves the assembly efficiency of the stator assembly, and effectively improves the slot filling rate, thereby reducing resistance and copper loss, and improving the efficiency of the motor using the stator assembly. At the same time, the tooth portion and the yoke portion of the present application have simple structures, low manufacturing difficulty, and have the advantages of high production efficiency, low cost, and high yield rate, which is convenient for product industrialization.

Description

Technical Field

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

[0002] The stator is an important part of the motor, and its performance directly affects the overall operating efficiency and reliability of the motor. Winding not only ensures that the coil can be evenly and tightly wound on the stator teeth, but also takes into account the slot fill rate. Whether it is a winding machine or manual operation, there is a certain degree of difficulty. 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 proposes a stator assembly, which greatly reduces the difficulty of winding the winding, improves the assembly efficiency of the stator assembly, and effectively improves the slot filling rate, thereby reducing the resistance and copper loss, and improving the efficiency of the motor using the stator assembly.

[0004] The present invention also provides a motor, comprising the above-mentioned stator assembly.

[0005] According to an embodiment of the present invention, the stator assembly includes: a yoke, which is annular; a tooth portion, wherein the tooth portion and the yoke are separately processed parts, the tooth portion is a plurality of teeth spaced apart along the circumferential direction of the yoke, the tooth portion includes a tooth root segment and a tooth body, the tooth body is located radially inside the yoke, the tooth root segment is embedded in the yoke, the dimension of the tooth root segment along the circumferential direction of the yoke is a, and the dimension of the tooth body along the circumferential direction of the yoke is b, wherein a≤b.

[0006] According to the stator assembly of the embodiment of the present invention, the yoke is annular, the tooth portion and the yoke are separate processed parts, the tooth portion is a plurality of teeth spaced apart along the circumferential direction of the yoke, the tooth portion includes a tooth root section and a tooth body, the tooth body is located on the radial inner side of the yoke, the tooth root section is embedded in the yoke, the dimension of the tooth root section along the circumferential direction of the yoke is a, and the dimension of the tooth body along the circumferential direction of the yoke is b, wherein a≤b, thereby greatly reducing the difficulty of winding the winding, facilitating winding by a winding machine or manual winding, reducing the difficulty of assembly, improving the assembly efficiency of the stator assembly, and effectively improving the slot fill rate, thereby reducing resistance and copper loss, and improving the efficiency of the motor using the stator assembly. At the same time, the tooth portion and the yoke portion of the present application have a simple structure, low manufacturing difficulty, and have the advantages of high production efficiency, low cost, and high yield rate, which is convenient for product industrialization.

[0007] In some embodiments of the present invention, the yoke has a plurality of matching grooves for respectively embedding the plurality of tooth root segments, the tooth root segments have grooves, and the inner walls of the matching grooves have protrusions matching with the grooves.

[0008] In some embodiments of the present invention, both sides of the tooth root segment along the circumferential direction of the yoke have the groove, and both sides of the matching groove along the circumferential direction of the yoke have the protrusion matching with the groove.

[0009] In some embodiments of the present invention, both sides of the tooth root segment along the circumferential direction of the yoke have one groove or a plurality of grooves spaced apart along the radial direction of the yoke.

[0010] In some embodiments of the present invention, the grooves on both sides of the tooth root segment along the circumferential direction of the yoke are symmetrically or asymmetrically arranged with respect to the center plane of the tooth portion; and / or, the depths of the grooves on both sides of the tooth root segment along the circumferential direction of the yoke are the same or different along the circumferential direction of the yoke; and / or, the sizes of the grooves on both sides of the tooth root segment along the circumferential direction of the yoke are the same or different along the radial direction of the yoke.

[0011] In some embodiments of the present invention, the tooth portion further includes a tooth top segment, the tooth top segment is located on a side of the tooth body away from the tooth root segment, and a dimension of the tooth top segment along the circumferential direction of the yoke is c, wherein c>b.

[0012] In some embodiments of the present invention, a stator slot is formed between two adjacent tooth portions, a notch of the stator slot is formed between the tooth top segments of two adjacent tooth portions, and along the circumferential direction of the yoke, the center plane of the stator slot has a different size from the two adjacent tooth top segments.

[0013] In some embodiments of the present invention, the tooth top segment includes a tooth top body, a first boot and a second boot, the tooth top body is located on the side of the tooth body away from the tooth root segment, the first boot and the second boot are respectively located on both sides of the tooth top body along the circumferential direction of the yoke and both extend beyond the tooth body, and along the circumferential direction of the yoke, the size of the first boot and the size of the second boot are not equal.

[0014] In some embodiments of the present invention, the first boot has a first harmonic groove on a side facing away from the tooth body, the second boot has a second harmonic groove on a side facing away from the tooth body, the first harmonic groove and the second harmonic groove are spaced apart in a circumferential direction of the yoke, the first harmonic groove extends to an end of the first boot facing away from the second boot, and the second harmonic groove extends to an end of the second boot facing away from the first boot.

[0015] In some embodiments of the present invention, ends of the first harmonic slot and the second harmonic slot close to each other both extend onto the tooth tip body portion.

[0016] In some embodiments of the present invention, an angle between a side wall and a bottom wall of the first harmonic slot is different from an angle between a side wall and a bottom wall of the second harmonic slot.

[0017] In some embodiments of the present invention, the present invention further includes: a winding, wherein the winding is wound on the tooth body of the plurality of teeth.

[0018] A motor according to an embodiment of the present invention includes the above-mentioned stator assembly.

[0019] According to the motor of the embodiment of the present invention, a stator assembly is provided, wherein the yoke is annular, the tooth portion and the yoke portion are separate processed parts, the tooth portion is a plurality of teeth spaced apart along the circumferential direction of the yoke portion, the tooth portion includes a tooth root segment and a tooth body, the tooth body is located radially inside the yoke portion, the tooth root segment is embedded in the yoke portion, the dimension of the tooth root segment along the circumferential direction of the yoke portion is a, and the dimension of the tooth body along the circumferential direction of the yoke portion is b, wherein a≤b, thereby greatly reducing the difficulty of winding the winding, facilitating winding by a winding machine or manual winding, reducing the difficulty of assembly, improving the assembly efficiency of the stator assembly, and effectively improving the slot fill rate, thereby reducing resistance and copper loss, and improving the efficiency of the motor. At the same time, the tooth portion and the yoke portion of the present application have simple structures, low manufacturing difficulty, and have the advantages of high production efficiency, low cost, and high yield rate, and are convenient for product industrialization.

[0020] 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

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a structural diagram of a stator assembly according to an embodiment of the present invention;

[0023] Figure 2 is a top view of a stator assembly according to an embodiment of the present invention, wherein the winding is not shown;

[0024] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 is a top view of a stator assembly according to another embodiment of the present invention, wherein the winding is not shown;

[0026] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0027] Reference numerals:

[0028] 100. stator assembly;

[0029] 1. yoke; 11. matching groove; 111. protrusion;

[0030] 2. tooth portion; 21. tooth root segment; 211. groove; 22. tooth body; 23. tooth top segment; 231. tooth top body portion; 232. first shoe portion; 2321. first harmonic groove; 233. second shoe portion; 2331. second harmonic groove;

[0031] 3. Stator slot;

[0032] 4. Winding. DETAILED DESCRIPTION

[0033] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] A stator assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0037] like Figure 1-Figure 5As shown, the stator assembly 100 according to the embodiment of the present invention comprises a yoke 1 and a tooth 2. The yoke 1 is annular, the tooth 2 and the yoke 1 are separate processed parts, the tooth 2 is a plurality of teeth spaced apart along the circumferential direction of the yoke 1, the tooth 2 comprises a tooth root section 21 and a tooth body 22, the tooth body 22 is located at the radial inner side of the yoke 1, the tooth root section 21 is embedded in the yoke 1, the dimension of the tooth root section 21 along the circumferential direction of the yoke 1 is a, and the dimension of the tooth body 22 along the circumferential direction of the yoke 1 is b, wherein a≤b.

[0038] It can be understood that the stator assembly 100 also includes a winding 4. Since the tooth portion 2 and the yoke portion 1 are separately processed parts, the winding 4 can be assembled with the tooth body 22 of multiple tooth portions 2 from the tooth root segment 21 to the tooth body 22, and then the multiple tooth portions 2 and the yoke portion 1 can be spliced ​​from the axial direction of the yoke portion 1 to form the stator assembly 100.

[0039] Specifically, the dimension of the tooth root section 21 along the circumferential direction of the yoke 1 is a, the dimension of the tooth body 22 along the circumferential direction of the yoke 1 is b, and a≤b, so that the formed winding 4 is directly inserted into the tooth body 22 of multiple tooth parts 2 from the tooth root section 21 to the tooth body 22; or, the winding 4 includes multiple sub-windings corresponding to the multiple tooth parts 2, each formed sub-winding is inserted into the tooth body 22 of the corresponding tooth part 2 from the tooth root section 21 to the tooth body 22; or, the winding 4 is wound on the tooth body 22 of multiple tooth parts 2 from the tooth root section 21 to the tooth body 22. Therefore, through such a setting, the winding difficulty of the winding 4 is greatly reduced, which is convenient for winding by a winding machine or manual winding, reduces the assembly difficulty, improves the assembly efficiency of the stator assembly 100, and makes the winding method of the concentrated winding 4 more flexible, effectively improves the slot full rate, thereby reducing the resistance and copper loss, and improving the efficiency of the motor using the stator assembly 100.

[0040] Compared with the prior art where multiple teeth 2 are integrated, the present application arranges multiple teeth 2 spaced apart along the circumferential direction of the yoke 1, and the distance between the teeth 2 and the teeth 2 along the circumferential direction of the yoke 1 does not need to consider the wire width of the winding machine, thereby avoiding the excessive distance between the teeth 2 and the teeth 2 along the circumferential direction of the yoke 1, which reduces the performance and reliability of the motor. At the same time, the present application has a simple structure of the teeth 2 and the yoke 1, low manufacturing difficulty, and has the advantages of high production efficiency, low cost, and high yield rate, which is convenient for product industrialization.

[0041] By embedding the tooth root section 21 in the yoke 1, the connection reliability between the tooth section 2 and the yoke 1 is ensured, and the close fit between the tooth section 2 and the yoke 1 is ensured, thereby improving the overall assembly accuracy of the stator assembly 100, thereby reducing the shape error of the inner surface of the stator assembly 100, thereby improving the cylindricality, thereby improving the efficiency and output power of the motor using the stator assembly 100, and reducing the vibration and noise of the motor. At the same time, such a setting can ensure the concentricity of multiple tooth sections 2, effectively avoid the deflection of the stator teeth, reduce the wear and noise caused by vibration and wear during the operation of the motor using the stator assembly 100, improve the running stability of the motor, and reduce the magnetic flux leakage and magnetic resistance, thereby improving the efficiency and output power of the motor.

[0042] Optionally, the yoke 1 can be manufactured by a stamping process or a press forming process to improve the high precision and stability of the yoke 1, and the tooth portion 2 can be manufactured by a stamping process or a press forming process to improve the high precision and stability of the tooth portion 2, thereby improving the reliability of the stator assembly 100.

[0043] Furthermore, the stator assembly 100 further includes two end plates, which are respectively located at the two ends of the yoke 1 in the axial direction, and the end plates are used to fix the plurality of teeth 2 and the winding 4. Thus, the stator assembly 100 is supported by the end plates, and can withstand various forces and moments during the operation of the motor, protect the teeth 2 and the winding 4 from damage by the external environment, and prevent the teeth 2 from loosening or being damaged due to vibration or electromagnetic force during the operation of the motor, thereby further improving the reliability of the stator assembly 100.

[0044] According to the stator assembly 100 of the embodiment of the present invention, the yoke 1 is annular, the tooth 2 and the yoke 1 are separate processed parts, the tooth 2 is a plurality of teeth spaced apart along the circumferential direction of the yoke 1, the tooth 2 includes a tooth root section 21 and a tooth body 22, the tooth body 22 is located on the radial inner side of the yoke 1, the tooth root section 21 is embedded in the yoke 1, the dimension of the tooth root section 21 along the circumferential direction of the yoke 1 is a, and the dimension of the tooth body 22 along the circumferential direction of the yoke 1 is b, wherein a≤b, thereby greatly reducing the difficulty of winding the winding 4, facilitating winding by a winding machine or manual winding, reducing the difficulty of assembly, improving the assembly efficiency of the stator assembly 100, and effectively improving the slot filling rate, thereby reducing resistance and copper loss, and improving the efficiency of the motor using the stator assembly 100. At the same time, the tooth 2 and the yoke 1 of the present application have simple structures, low manufacturing difficulty, high production efficiency, low cost, and high yield rate, and are convenient for product industrialization.

[0045] In some embodiments of the present invention, Figure 2-Figure 5As shown, the yoke 1 has a plurality of matching grooves 11 for respectively embedding a plurality of tooth root segments 21, the tooth root segment 21 has a groove 211, and the inner wall of the matching groove 11 has a protrusion 111 that matches the groove 211. Thus, through the matching of the groove 211 and the protrusion 111, the precise positioning and stable connection between the yoke 1 and the plurality of tooth root segments 21 are further ensured, thereby improving the overall assembly accuracy of the stator assembly 100, thereby improving the cylindricity of the stator assembly 100 and the concentricity of the plurality of teeth 2, further reducing the wear and noise caused by vibration and wear during the operation of the motor using the stator assembly 100, improving the running stability of the motor, reducing magnetic flux leakage and magnetic resistance, and improving the efficiency and output power of the motor.

[0046] In some embodiments of the present invention, Figure 2-Figure 5 As shown, both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 have grooves 211, and both sides of the matching groove 11 along the circumferential direction of the yoke 1 have protrusions 111 that match the grooves 211. Therefore, through such an arrangement, the precise positioning and stable connection between the yoke 1 and the plurality of tooth root segments 21 are further improved, the efficiency and output power of the motor using the stator assembly 100 are further improved, and the vibration and noise of the motor are reduced.

[0047] In some embodiments of the present invention, both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 have one groove 211 or a plurality of grooves 211 spaced apart along the radial direction of the yoke 1 .

[0048] It is understandable that if Figure 2 and Figure 3 As shown, the tooth root segment 21 has a groove 211 on both sides along the circumferential direction of the yoke 1. Therefore, through such an arrangement, while ensuring the precise positioning and stable connection between the yoke 1 and the multiple tooth root segments 21, the design of the groove 211 is relatively simple, easy to manufacture and process, reducing the cost of the component, and facilitating the assembly of the yoke 1 and the multiple tooth root segments 21, thereby improving the assembly efficiency of the stator assembly 100.

[0049] or, as Figure 4 and Figure 5 As shown, both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 are provided with a plurality of grooves 211 spaced apart in the radial direction of the yoke 1. Thus, through the cooperation of the plurality of grooves 211 and the corresponding plurality of protrusions 111, the connection between the yoke 1 and the plurality of tooth root segments 21 is made more firm, thereby improving the connection strength between the yoke 1 and the plurality of tooth root segments 21, so that the stator assembly 100 can adapt to more complex application scenarios, such as electrical equipment that needs to withstand high torque, high vibration or high temperature environment.

[0050] In some embodiments of the present invention, Figure 2-Figure 5As shown, the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 are symmetrically or asymmetrically arranged with respect to the center plane of the tooth portion 2 .

[0051] It can be understood that the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 are symmetrically arranged about the center plane of the tooth portion 2, so that the symmetrically arranged grooves 211 help to maintain the balance of the stator teeth in the circumferential direction, and the tooth portion 2 is easier to align during assembly, reducing the difficulty and complexity of assembly, and improving the assembly efficiency of the stator assembly 100; or, the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 are asymmetrically arranged about the center plane of the tooth portion 2, so that the asymmetrically arranged grooves 211 can suppress torque pulsation, thereby playing a role in reducing the noise and vibration of the motor using the stator assembly 100. Therefore, the versatility of the stator assembly 100 is improved through such an arrangement, and it can be adapted to motors with different needs.

[0052] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the depths of the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 along the circumferential direction of the yoke 1 are the same or different.

[0053] It can be understood that the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 have the same depth along the circumferential direction of the yoke 1, ensuring the connection consistency of the tooth root in the circumferential direction of the yoke 1, improving the overall stability and reliability, and making it easier to align the tooth 2 during assembly, reducing the difficulty and complexity of assembly, and improving the assembly efficiency of the stator assembly 100; or, the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 have different depths along the circumferential direction of the yoke 1, so that the asymmetrically arranged grooves 211 can suppress torque pulsation, thereby playing a role in reducing the noise and vibration of the motor using the stator assembly 100. Therefore, the versatility of the stator assembly 100 is improved through such an arrangement, and it can be adapted to motors with different needs.

[0054] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the sizes of the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 along the radial direction of the yoke 1 are the same or different.

[0055] It can be understood that the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 have the same size along the radial direction of the yoke 1, ensuring the connection consistency of the tooth root in the radial direction of the yoke 1, improving the overall stability and reliability, and making it easier to align the tooth 2 during assembly, reducing the difficulty and complexity of assembly, and improving the assembly efficiency of the stator assembly 100; or, the grooves 211 on both sides of the tooth root segment 21 along the circumferential direction of the yoke 1 have different sizes along the radial direction of the yoke 1, so that the asymmetrically arranged grooves 211 can suppress torque pulsation, thereby playing a role in reducing the noise and vibration of the motor using the stator assembly 100. Therefore, the versatility of the stator assembly 100 is improved through such an arrangement, and it can be adapted to motors with different needs.

[0056] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the tooth portion 2 also includes a tooth top segment 23, which is located on the side of the tooth body 22 away from the tooth root segment 21, and the size of the tooth top segment 23 along the circumferential direction of the yoke 1 is c, where c>b. Therefore, after the stator assembly 100 is assembled, the winding 4 located on the tooth body 22 is limited in the radial direction of the yoke 1 by the tooth top segment 23 and the yoke 1, effectively preventing the winding 4 from falling off the tooth body 22, thereby ensuring the stable operation of the motor using the stator assembly 100. At the same time, through such a setting, the expansion of the size of the tooth top segment 23 relative to the tooth root segment 21 and the tooth body 22 helps to better dissipate heat and prevent the motor from overheating.

[0057] In some embodiments of the present invention, Figure 2-Figure 5 As shown, a stator slot 3 is formed between two adjacent tooth portions 2, and a notch of the stator slot 3 is formed between the tooth top segments 23 of two adjacent tooth portions 2. Along the circumferential direction of the yoke 1, the center plane of the stator slot 3 has different sizes from the two adjacent tooth top segments 23.

[0058] It can be understood that, along the circumferential direction of the yoke 1, the distance between two adjacent teeth 2 and the center plane of the stator slot 3 between the two adjacent teeth 2 is respectively the first slot and the second slot, and the sizes of the first slot and the second slot are different. Therefore, by forming an asymmetric slot, the distribution of the magnetic field and the current can be changed, thereby effectively suppressing the torque pulsation, reducing noise and vibration, and thus improving the stability and reliability of the motor using the stator assembly 100.

[0059] In some embodiments of the present invention, Figure 2-Figure 5As shown, the tooth top segment 23 includes a tooth top body portion 231, a first boot portion 232 and a second boot portion 233. The tooth top body portion 231 is located on the side of the tooth body 22 away from the tooth root segment 21, and the first boot portion 232 and the second boot portion 233 are respectively located on both sides of the tooth top body portion 231 along the circumferential direction of the yoke 1 and both extend beyond the tooth body 22. Along the circumferential direction of the yoke 1, the size of the first boot portion 232 and the size of the second boot portion 233 are not equal.

[0060] It can be understood that a stator slot 3 is formed between two adjacent tooth portions 2, and a notch is formed between the first shoe 232 of one tooth portion 2 and the second shoe 233 of the other tooth portion 2 of the two adjacent tooth portions 2, and the notch includes a first notch between the center plane of the stator slot 3 and the first shoe 232 and a second notch between the center plane of the stator slot 3 and the second shoe 233. Along the circumferential direction of the yoke 1, the size of the first shoe 232 and the size of the second shoe 233 are unequal so that the sizes of the first notch and the second notch are different, thereby changing the distribution of the magnetic field and current, thereby effectively suppressing torque pulsation, reducing noise and vibration, and thereby improving the stability and reliability of the motor using the stator assembly 100.

[0061] At the same time, the first boot 232 and the second boot 233 are respectively located on both sides of the tooth top body 231 along the circumferential direction of the yoke 1 and both extend beyond the tooth body 22, thereby ensuring that the size of the tooth top segment 23 formed by the tooth top body 231, the first boot 232 and the second boot 233 along the circumferential direction of the yoke 1 is greater than the size of the tooth body 22 along the circumferential direction of the yoke 1.

[0062] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the first shoe 232 has a first harmonic groove 2321 on the side facing away from the tooth body 22, and the second shoe 233 has a second harmonic groove 2331 on the side facing away from the tooth body 22. The first harmonic groove 2321 and the second harmonic groove 2331 are spaced apart in the circumferential direction of the yoke 1, and the first harmonic groove 2321 extends to one end of the first shoe 232 facing away from the second shoe 233, and the second harmonic groove 2331 extends to one end of the second shoe 233 facing away from the first shoe 232.

[0063] Thus, by setting the first harmonic slot 2321 and the second harmonic slot 2331, the tooth top section 23 is cut out, thereby changing the interaction relationship between the stator slot 3 and the permanent magnet, thereby suppressing torque pulsation, reducing noise and vibration, and improving the output quality of the motor. At the same time, during the operation of the motor, various harmonics will be generated due to the change of the magnetic field and the distribution of the current. The design of the first harmonic slot 2321 and the second harmonic slot 2331 can change the distribution of the magnetic field and the current, effectively suppress the generation of harmonics and permeance harmonics, and further improve the performance and stability of the motor.

[0064] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the ends of the first harmonic slot 2321 and the second harmonic slot 2331 close to each other both extend to the tooth top body 231. Thus, by such an arrangement, the sizes of the first harmonic slot 2321 and the second harmonic slot 2331 are increased, so that the first harmonic slot 2321 and the second harmonic slot 2331 can more effectively suppress the generation of harmonics and permeance harmonics, further improving the performance and stability of the motor.

[0065] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the angle between the side wall and the bottom wall of the first harmonic slot 2321 is different from the angle between the side wall and the bottom wall of the second harmonic slot 2331. Thus, the asymmetric design of the first harmonic slot 2321 and the second harmonic slot 2331 is achieved through such an arrangement, thereby effectively suppressing torque pulsation, reducing noise and vibration, and thus improving the stability and reliability of the motor using the stator assembly 100.

[0066] In some embodiments of the present invention, Figure 1 As shown, the stator assembly 100 also includes a winding 4. The winding 4 is wound on the tooth body 22 of the multiple tooth parts 2. It can be understood that when the winding 4 needs to be wound on the tooth body 22 of the multiple tooth parts 2, the tooth part 2 and the yoke part 1 are separate processed parts, and the winding 4 can be wound on the tooth body 22 of the multiple tooth parts 2 from the tooth root section 21 to the tooth body 22, thereby reducing the difficulty of winding, improving the assembly efficiency of the stator assembly 100, and effectively improving the slot fill rate, thereby reducing the resistance and copper loss, and improving the efficiency of the motor using the stator assembly 100.

[0067] It should be noted that the winding 4 can also be a formed winding 4, which is directly inserted into the tooth body 22 of multiple tooth portions 2 from the tooth root segment 21 to the tooth body 22; or, the winding 4 includes multiple sub-windings corresponding to the multiple tooth portions 2 one by one, and each formed sub-winding is inserted into the tooth body 22 of the corresponding tooth portion 2 from the tooth root segment 21 to the tooth body 22, thereby making the winding method of the winding 4 more flexible, while improving the slot fill rate and making the stator assembly 100 adaptable to motors with different performances.

[0068] The following describes a motor according to an embodiment of the present invention.

[0069] The motor according to the embodiment of the present invention includes a stator assembly 100 .

[0070] According to the motor of the embodiment of the present invention, a stator assembly 100 is provided, wherein the yoke 1 is annular, the tooth 2 and the yoke 1 are separate processed parts, the tooth 2 is a plurality of teeth spaced apart along the circumferential direction of the yoke 1, the tooth 2 includes a tooth root section 21 and a tooth body 22, the tooth body 22 is located radially inside the yoke 1, the tooth root section 21 is embedded in the yoke 1, the dimension of the tooth root section 21 along the circumferential direction of the yoke 1 is a, the dimension of the tooth body 22 along the circumferential direction of the yoke 1 is b, wherein a≤b, thereby greatly reducing the difficulty of winding the winding 4, facilitating winding by a winding machine or manual winding, reducing the difficulty of assembly, improving the assembly efficiency of the stator assembly 100, and effectively improving the slot filling rate, thereby reducing the resistance and copper loss, and improving the efficiency of the motor. At the same time, the tooth 2 and the yoke 1 of the present application have simple structures, low manufacturing difficulty, and have the advantages of high production efficiency, low cost, and high yield rate, and are convenient for product industrialization.

[0071] Other structural examples of the stator assembly 100 according to the embodiment of the present invention, such as the winding 4 and the end plate, and operations thereof are known to those skilled in the art and will not be described in detail here.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does 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.

[0073] 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 assembly, characterized in that: include: A yoke (1), wherein the yoke (1) is annular; A tooth portion (2), wherein the tooth portion (2) and the yoke portion (1) are separately processed parts, the tooth portion (2) is a plurality of teeth spaced apart in the circumferential direction of the yoke portion (1), the tooth portion (2) comprises a tooth root segment (21) and a tooth body (22), the tooth body (22) is located radially inward of the yoke portion (1), the tooth root segment (21) is embedded in the yoke portion (1), the dimension of the tooth root segment (21) in the circumferential direction of the yoke portion (1) is a, and the dimension of the tooth body (22) in the circumferential direction of the yoke portion (1) is b, wherein a≤b, The yoke (1) has a plurality of matching grooves (11) for respectively embedding a plurality of tooth root segments (21); the tooth root segment (21) has a groove (211); the inner wall of the matching groove (11) has a protrusion (111) matching with the groove (211); the tooth root segment (21) has the groove (211) on both sides along the circumferential direction of the yoke (1); the matching groove (11) has the protrusion (111) matching with the groove (211) on both sides along the circumferential direction of the yoke (1); the grooves (211) on both sides of the tooth root segment (21) along the circumferential direction of the yoke (1) are asymmetrically arranged with respect to the center plane of the tooth portion (2).

2. The stator assembly according to claim 1, characterized in that The tooth root segment (21) has one groove (211) on both sides along the circumferential direction of the yoke (1) or a plurality of grooves (211) spaced apart along the radial direction of the yoke (1).

3. The stator assembly according to claim 1, characterized in that: The grooves (211) on both sides of the tooth root segment (21) along the circumferential direction of the yoke (1) have different depths along the circumferential direction of the yoke (1); And / or, the grooves (211) on both sides of the tooth root segment (21) along the circumferential direction of the yoke (1) have different sizes along the radial direction of the yoke (1).

4. The stator assembly according to claim 1, characterized in that: The tooth portion (2) further comprises a tooth top segment (23), wherein the tooth top segment (23) is located on a side of the tooth body (22) away from the tooth root segment (21), and a dimension of the tooth top segment (23) along the circumferential direction of the yoke portion (1) is c, wherein c>b.

5. The stator assembly according to claim 4, characterized in that: A stator slot (3) is formed between two adjacent tooth portions (2), a notch of the stator slot (3) is formed between the tooth top segments (23) of the two adjacent tooth portions (2), and along the circumferential direction of the yoke portion (1), the center plane of the stator slot (3) has a different size from the two adjacent tooth top segments (23).

6. The stator assembly according to claim 4, characterized in that The tooth top segment (23) comprises a tooth top body portion (231), a first boot portion (232) and a second boot portion (233); the tooth top body portion (231) is located on the side of the tooth body (22) away from the tooth root segment (21); the first boot portion (232) and the second boot portion (233) are respectively located on both sides of the tooth top body portion (231) along the circumferential direction of the yoke (1) and both extend beyond the tooth body (22); along the circumferential direction of the yoke (1), the size of the first boot portion (232) and the size of the second boot portion (233) are not equal.

7. The stator assembly according to claim 6, characterized in that The first boot (232) has a first harmonic groove (2321) on a side facing away from the tooth body (22), and the second boot (233) has a second harmonic groove (2331) on a side facing away from the tooth body (22), the first harmonic groove (2321) and the second harmonic groove (2331) are spaced apart along the circumferential direction of the yoke (1), the first harmonic groove (2321) extends to an end of the first boot (232) facing away from the second boot (233), and the second harmonic groove (2331) extends to an end of the second boot (233) facing away from the first boot (232).

8. The stator assembly according to claim 7, characterized in that The ends of the first harmonic slot (2321) and the second harmonic slot (2331) close to each other both extend onto the tooth top body (231).

9. The stator assembly according to claim 7, characterized in that: The angle between the side wall and the bottom wall of the first harmonic slot (2321) is different from the angle between the side wall and the bottom wall of the second harmonic slot (2331).

10. The stator assembly according to claim 1, characterized in that Also includes: A winding (4), wherein the winding (4) is wound on the tooth body (22) of the plurality of tooth portions (2).

11. A motor, characterized in that: The invention comprises a stator assembly (100) according to any one of claims 1 to 10.

Images