A stator core and a stator

Abstract

The present invention discloses a stator core, which includes a plurality of core units and mounting members. Assembly portions are provided on the opposite sides of adjacent core units, and the assembly portions extend along the radial direction of the stator core. The mounting members can cooperate with the assembly portions so that the core units are assembled circumferentially to form the stator core. The stator core provided by the present invention is formed by assembling core units, and a design combining a split structure and an embedded assembly is adopted to avoid the phenomena of lamination and interlayer sliding of silicon steel sheets, and no silicon steel sheet fault will be formed. The coils on each core unit can be wound independently, solving the general problem of coil winding, enabling mechanical automated winding, improving the winding production efficiency, greatly increasing the slot fill factor so as to improve the power density of the motor. The adjacent core units are assembled through the cooperation of the mounting members and the assembly portions, which can not only fix and support the core units, but also undertake the yoke magnetic circuit channel to ensure the magnetic conductivity. The present invention also provides a stator including the aforementioned stator core.

Description

Technical Field

[0001] The present invention relates to the technical field of motor production, and more specifically, to a stator core and a stator. Background Art

[0002] The disc motor is a new type of axial magnetic field motor. The stator core of the early disc motor is wound into a disc by a whole section of silicon steel sheet, and the stator slots are automatically punched during the winding process. The stator slot openings of the disc motor often need to be designed as semi-closed slot structures, resulting in that the stator core of the disc motor cannot be automatically wound by machine and can only be wound manually. The winding efficiency of the disc motor is low, and the coil slot fill factor of the stator slots is relatively low.

[0003] On the other hand, different from the traditional radial flux motor, the stator core of the disc motor is formed by winding silicon steel strips to form an axial magnetic flux. During assembly, the stator core and the housing are axially fixed by bolts. However, the bolt fixation of the stator core often causes problems such as delamination and interlayer sliding of the stator core, and the bolt holes also affect the magnetic circuit performance of the motor. Summary of the Invention

[0004] The purpose of the present invention is to provide a core unit to solve the problem of axial fixation between the stator core and the housing, as well as the problems that the stator core in the prior art can only be wound manually, the coil slot fill factor of the stator slots is relatively low, and there are delamination and interlayer sliding of the stator core.

[0005] To achieve the above purpose, the present invention provides a stator core, which includes a plurality of core units and a mounting member. Assembly portions are provided on the opposite side surfaces of adjacent core units, and the assembly portions extend along the radial direction of the stator core. The mounting member can cooperate with the assembly portions so that the core units are assembled circumferentially to form the stator core.

[0006] Optionally, in the height direction, the assembly portion is provided at one end of the side surface of the core unit.

[0007] Optionally, a first wing plate is provided at one end of the core unit. The first wing plate protrudes from the side surface of the core unit and extends along the radial direction. The assembly portion includes the gap in the height direction between the coil on the core unit and the first wing plate.

[0008] Optionally, the mounting member includes an extension portion, and the extension portion is arranged radially and can be inserted into the assembly portion.

[0009] Optionally, the mounting member further includes an annular portion, and the annular portion extends circumferentially. The extension portion is arranged radially on the outside of the annular portion.

[0010] Optionally, the assembly portion includes a slot provided on the side surface of the core unit, and the slot extends along the radial direction.

[0011] Optionally, the mounting member includes an insertion plate, and the insertion plate can be inserted radially into the assembly portion.

[0012] Optionally, the mounting member includes a pressing plate for pressing the plug board.

[0013] Optionally, the pressing plate is provided with a plurality of openings, the iron core unit can be inserted into the openings, and the side surface of the iron core unit can be attached to the inner side surface of the openings.

[0014] Optionally, the mounting member is provided with mounting holes for mounting the stator core.

[0015] Optionally, the mounting member is formed by axially laminating silicon steel sheets or soft magnetic composite materials.

[0016] The present invention provides a stator, which includes a coil and the stator core in any of the above embodiments, and the coil is arranged on the iron core unit of the stator core.

[0017] Optionally, the stator further includes a housing, and the stator core is fixed in the housing through the mounting holes on the mounting member.

[0018] As described above, a stator core provided by the present invention is assembled by a plurality of iron core units, and a design scheme combining a split structure and an embedded assembly is adopted, which avoids the phenomena of delamination and interlayer sliding of the silicon steel sheets of the stator core, does not form a silicon steel sheet fault, and ensures the service performance of the stator core. At the same time, the coils on each iron core unit can be wound separately, solving the common problem of winding the coils of the disc motor stator core with semi-closed slots. The coils on a single iron core unit can be wound mechanically and automatically, improving the winding production efficiency and significantly increasing the slot fill factor, thereby enhancing the power density of the motor. In addition, the adjacent iron core units are assembled through the cooperation of the mounting member and the assembling part. The mounting member and the assembling part not only play the role of fixing and supporting the iron core unit, but also can undertake the role of the magnetic circuit channel of the yoke part of the stator core, without the need to add additional yoke magnetic conductors, ensuring the magnetic conductivity of the stator core.

[0019] To make the above content of the present invention more obvious and understandable, the following specifically gives preferred embodiments and details them in conjunction with the accompanying drawings. Description of the Drawings

[0020] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0021] Figure 1 Schematically shows a three-dimensional structural view of a stator core according to an embodiment of the present invention;

[0022] Figure 2 Schematically shows a combined schematic diagram of iron core units in a stator core according to an embodiment of the present invention;

[0023] Figure 3 Schematically shows a structural diagram of the assembly of the core unit and the coil in a stator core according to an embodiment of the present invention;

[0024] Figure 4 Schematically shows a structural diagram of the mounting member in a stator core according to an embodiment of the present invention;

[0025] Figure 5 Schematically shows a partial structural diagram of a stator core according to another embodiment of the present invention;

[0026] Figure 6 Schematically shows a three-dimensional structural diagram of a stator core according to another embodiment of the present invention;

[0027] Figure 7 Schematically shows a combined diagram of the core units in a stator core according to another embodiment of the present invention;

[0028] Figure 8 Schematically shows a structural diagram of the pressing plate in a stator core according to another embodiment of the present invention;

[0029] Figure 9 Schematically shows a structural diagram of a stator according to an embodiment of the present invention. Detailed Embodiments

[0030] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this implementation manner. On the contrary, the purpose of introducing the invention in conjunction with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the following description. The present invention can also be implemented without these details. In addition, in order to avoid confusing or obscuring the key points of the present invention, some specific details will be omitted in the description.

[0031] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0032] See Figures 1-9 As shown, the present invention also provides a stator core 1, including a plurality of core units 10 and a mounting member 11. Assembly portions (not marked in the figure) are provided on the opposite side surfaces 100 of adjacent core units 10. The assembly portions extend along the radial direction of the stator core 1 (such as Figures 1-2 shown by the R direction in FIGS. 5 and 6), and the mounting member 11 can cooperate with the assembly portions, so that the core units 10 are arranged circumferentially (such as Figures 1-2, 5, 6 as shown in the T direction) to assemble and form the stator core 1.

[0033] That is to say, the entire stator core 1 is assembled by a plurality of core units 10 along the circumferential direction. In this embodiment, the stator core 1 is assembled by 30 core units 10 along the circumferential direction. Assembly parts are provided on the side surface 100 of each core unit 10. A through groove 12 is formed between the opposite side surfaces 100 of adjacent core units 10. The coil 20 is located in the through groove 12. The installation part 11 can extend into the through groove 12 and cooperate with the assembly part to enable the core units 10 to be assembled along the circumferential direction to form the stator core 1. Among them, the through groove 12 extends equidistantly along the radial direction of the stator core 1, facilitating the installation of the installation part 11. In other embodiments, the number of core units can also be other values, and the present invention does not limit this, and can be reasonably selected and set according to actual needs.

[0034] Specifically, in this embodiment, the stator core 1 is assembled by a plurality of core units 10, adopting a design scheme that combines a split structure with embedded assembly, avoiding the phenomena of lamination and interlayer sliding of the silicon steel sheets of the stator core 1, and not forming silicon steel sheet faults, ensuring the service performance of the stator core 1. At the same time, the coil 20 on each core unit 10 can be wound independently, solving the common problem of winding the coils of the disc motor stator core with semi-closed slots. The coil 20 on a single core unit 10 can be wound by mechanical automation, improving the winding production efficiency, greatly increasing the slot fill factor, and thus enhancing the power density of the motor. At the same time, the adjacent core units 10 are assembled through the cooperation of the installation part 11 and the assembly part. The installation part 11 and the assembly part not only play a role in fixing and supporting the core unit, but also can bear the role of the magnetic circuit channel of the yoke part of the stator core 1, without the need to add additional yoke magnetic conductors, ensuring the magnetic conductivity of the stator core 1.

[0035] It should be noted that the present invention does not limit the specific structures of the assembly part and the installation part in the stator core, and can be set according to actual needs. The present invention does not limit this, as long as the core units can be firmly assembled into the stator core through the cooperation of the installation part and the assembly part.

[0036] Furthermore, referring to Figures 1-3 , Figures 5-7 shown, in this embodiment, in the height direction (such as Figures 1-2 , 6 - 7 as shown in the Z direction), the assembly part is provided at one end of the side surface 100 of the core unit 10. That is to say, in the height direction, the assembly part is arranged at one end of the through groove 12. Preferably, the assembly part is arranged at the lower end of the through groove 12. By arranging the assembly part at one end of the side surface 100 of the core unit 10, it is convenient for the installation of the installation part 11 and the processing of the splicing part, which is beneficial to improving production efficiency and simplifying the structure.

[0037] Specifically, referring toFigures 1-3 As shown, in this embodiment, a first wing plate 101 is provided at one end of the iron core unit 10. The first wing plate 101 protrudes from the side surface 100 of the iron core unit 10 and extends radially. The assembling part includes the gap H in the height direction between the coil 20 on the iron core unit 10 and the first wing plate 101. That is to say, the assembling part includes the gap H, and the gap H is formed between the coil 20 on the iron core unit 10 and the first wing plate 101 in the height direction. During assembly, radially, the gap H is matched with the mounting member 11, that is, the mounting member 11 is inserted into the gap H radially, pressing the first wing plate 101 of the adjacent iron core unit 10 to achieve the assembly of the iron core unit 10.

[0038] In this embodiment, the first wing plate 101 is provided at one end of the iron core unit 10, protrudes from the side surface 100 of the iron core unit 10, and extends from one end of the iron core unit 10 to the other end along the radial direction. In other embodiments, in the height direction, the first wing plate can also be provided at the middle position of the iron core unit, etc. The present invention does not limit this, as long as a gap for the insertion of the mounting member can be formed between the first wing plate and the coil.

[0039] During assembly, the first wing plates 101 of adjacent iron core units 10 abut against each other, and can play the role of the magnetic circuit channel of the yoke part of the stator core 1, ensuring the magnetic conductivity of the yoke parts of multiple adjacent iron core units 10. A through groove 12 is formed between the two side surfaces 100 of adjacent iron core units 10. In the height direction, the upper end of the through groove 12 is open, which is a semi-open groove for arranging the coil 20. After the coil 20 is wound around the iron core unit 10, there is a gap H between the coil 20 and the first wing plate 101 in the height direction. The mounting member 11 can be inserted into the gap H, which can not only fix and support the iron core unit, but also enable the iron core unit 10 to be assembled into the stator core 1. At the same time, the mounting member 11 can also serve as the magnetic circuit channel of the yoke part of the stator core 1, ensuring the magnetic conductivity of the yoke parts of multiple adjacent stator cores 1.

[0040] In addition, referring to Figures 1-3 As shown, in this embodiment, in the height direction, a second wing plate 102 is provided on the upper part of the iron core unit 10. The two wings of the second wing plate 102 extend from the two side surfaces 100 of the iron core unit 10, and the extending distance of the second wing plate 102 is not greater than the extending distance of the first wing plate 101. By providing the second wing plate 102, not only can the cogging torque be well optimized, but also the coil 20 can be well prevented from slipping off the iron core unit 10, ensuring that the coil 20 is stably and reliably arranged on the iron core unit 10. At the same time, by limiting the extending distance of the second wing plate 102 not to be greater than the extending distance of the first wing plate 101, it can be ensured that only the first wing plates 101 abut against each other during the assembly of the iron core unit 10, facilitating the assembly of the iron core unit 10 and defining the magnetic circuit of the stator core 1.

[0041] Meanwhile, the gap H of the assembling part can be set between the coil 20 and the second wing plate 102, or the coil 20 can be divided into upper and lower parts, and the gap H is set between the upper and lower parts of the coil 20. The present invention does not limit this, and the gap can be set according to actual needs, as long as it is ensured that the installation part can stably and reliably assemble the iron core unit.

[0042] In this embodiment, the portions of the two side surfaces 100 of the iron core unit 10 other than the first wing plate 101 and the second wing plate 102 are flat surfaces. By setting the two side surfaces 100 of the iron core unit 10 as flat surfaces, it is convenient to set the coil 20 on the iron core unit 10, and the automatic winding of the coil can be realized by mechanical equipment, improving the production efficiency.

[0043] See Figure 4 and in combination with Figures 1-3 As shown, in this embodiment, the installation part 11 includes an extension part 110, and the extension part 110 is arranged radially and can be inserted into the assembling part. That is, the installation part 11 is a combination part with a radial extension part 110, and the extension part 110 is along the radial direction of the stator iron core 1 and can be inserted into the gap H between the coil 20 and the first wing plate 101 in the through slot 12, so that the iron core unit 10 is firmly assembled into the stator iron core 1.

[0044] See Figure 4 and in combination with Figures 1-3 As shown, in this embodiment, the installation part 11 further includes an annular part 111, and the annular part 111 extends circumferentially, and the extension part 110 is arranged radially on the outside of the annular part 111. The through hole in the middle of the annular part 111 is used for the installation of the rotor shaft, and the extension parts 110 are evenly spaced and arranged on the outside of the annular part 111 to form a spoke-like structure. When assembling the iron core unit 10, the iron core unit 10 is inserted radially into the space between two adjacent extension parts 110, that is, the extension part 110 is inserted into the gap H between the coil 20 and the first wing plate 101, so that the iron core unit 10 is sequentially installed on the installation part 11 along the circumferential direction and assembled into the stator iron core 1.

[0045] See Figures 5-8 As shown, in another embodiment, the assembling part includes a slot 15 arranged on the side surface 100 of the iron core unit 10, and the slot 15 extends radially. By arranging the slot 15 on the side surface 100 of the iron core unit 10, after the iron core unit 10 is assembled with the independently wound coil, it can be assembled into the stator iron core 1, which is convenient for the flexible setting of the coil assembly process.

[0046] Specifically, see Figures 5-8As shown, in the height direction, the through slot 12 is a semi-open slot. The coil 20 can be wound before the iron core unit 10 is assembled, or can be wound through the opening of the through slot 12 after assembly, which facilitates the setting of the coil 20 and provides a more flexible assembly sequence for production and processing. At the same time, the slot 15 is located on the side surface 100 of the iron core unit 10 within the through slot 12. In the height direction, the slot 15 can be close to the upper end of the iron core unit 10, can also be close to the lower end of the iron core unit 10, or can be located in the middle of the iron core unit 10. The present invention does not limit this and can be set according to actual needs.

[0047] Further, referring to Figures 5-8 As shown, in another embodiment, the mounting member 11 includes a plug board 16, and the plug board 16 can be inserted into the assembling portion along the radial direction. That is, during the assembly process, adjacent iron core units 10 approach each other, and the plug board 16 can be inserted into the opposite slots 15 of adjacent iron core units 10 to achieve the splicing of adjacent iron core units 10. The assembly process is simple and efficient, and automatic assembly can be achieved through mechanical equipment.

[0048] In order to enable the plug board 16 to stably and effectively achieve the assembly between the iron core units 10, referring to Figure 6 and combining with Figure 5 As shown, in another embodiment, the mounting member 11 includes a pressing plate 17 for pressing the plug board 16. Before inserting the plug board 16 into the slot 15 of the iron core unit 10, the pressing plate 17 can be sleeved on the iron core unit 10, then the plug board 16 is inserted into the slot 15 of the iron core unit 10, and finally another pressing plate 17 is provided on the lower side of the plug board 16. That is, in the height direction, pressing plates 17 are provided on both the upper and lower sides of the plug board 16, and the pressing plates 17 can effectively limit the movement of the plug board 16 and the iron core unit 10, ensuring that the plug board 16 can stably and effectively achieve the assembly between the iron core units 10.

[0049] Further, referring to Figure 8As shown in FIGS. 5 - 7, in another embodiment, the pressing plate 17 is provided with a plurality of openings 170. The iron core unit 10 can be inserted into the openings 170, and the side surface 100 of the iron core unit 10 can be attached to the inner side surface of the openings 170. That is to say, the pressing plate 17 is provided with openings 170 for defining the iron core unit 10. One or more iron core units 10 can correspond to each opening 170. Preferably, one iron core unit 10 can correspond to each opening 170. That is to say, only one iron core unit 10 is installed in each opening 170. The side surface 100 of the iron core unit 10 can be attached to the inner side surface of the opening 170, which can effectively limit the circumferential and radial movement of the iron core unit 10, realizing the circumferential, radial, and axial fixation and limitation of the iron core unit 10, improving the assembly accuracy of the iron core unit 10, facilitating the assembly and positioning of the iron core unit 10. At the same time, the side surface 100 of the iron core unit 10 can be attached to the inner side surface of the opening 170, enabling the pressing plate 17 and the inserting plate 16 to jointly form the magnetic path channel of the yoke part of the stator core 1, without the need to add additional yoke magnetic conductors, ensuring the magnetic conductivity of the stator core 1.

[0050] See Figures 1-9 As shown, in the present invention, the mounting member 11 is provided with mounting holes 13 for mounting the stator core 1. The mounting member 11 is formed by axially laminating silicon steel sheets or soft magnetic composite materials.

[0051] That is to say, the mounting member 11 is formed by axially laminating multiple layers of silicon steel sheets or soft magnetic composite materials and then riveting through the riveting holes 14, which is convenient for automatic machining by machinery, can save manpower, and improve production efficiency. Specifically, in this embodiment, the mounting member 11 with the radial extension part 110 and the annular part 111 is formed by axially laminating multiple layers of silicon steel sheets or soft magnetic composite materials and then riveting through the riveting holes 14. Among them, the riveting holes 14 are distributed on both the extension part 110 and the annular part 111 to realize the self - fastening of the mounting member 11. In another embodiment, both the inserting plate 16 and the pressing plate 17 are formed by axially laminating multiple layers of silicon steel sheets or soft magnetic composite materials and then riveting through the riveting holes 14. Among them, the riveting holes 14 are also distributed on both the inserting plate 16 and the pressing plate 17 to realize the self - fastening of the mounting member 11. In addition, in the present invention, the iron core unit 10 can also be formed by laminating multiple layers of silicon steel sheets or soft magnetic composite materials.

[0052] In other embodiments, the mounting member can also be made of other materials and processes into other structures. The present invention does not limit this, as long as it is ensured that the mounting member can perform the functions of magnetic conduction and fastening the iron core unit.

[0053] To facilitate the installation of the assembled stator core 1, see Figure 1 、 4, as shown in FIGS. 6 and 8, in the present invention, the mounting member 11 is provided with a mounting hole 13 for the fixed mounting of the mounting member 11. That is, when the stator core 1 is mounted, it is mounted through the mounting hole 13 on the mounting member 11, and there is no need to provide bolt holes on the core unit 10, which will not damage the magnetic circuit structure of the core unit 10 and ensure the magnetic conductivity of the stator core 1.

[0054] The present invention also provides a stator 2, which includes a coil 20 and the stator core 1 in any of the above embodiments, and the coil 20 is arranged on the core unit 10 of the stator core 1.

[0055] Further, referring to Figure 9 and combining with Figures 1-8 as shown, in this embodiment, the stator 2 further includes a housing 21, and the stator core 1 is fixed in the housing 21 through the mounting hole 13 on the mounting member 11. By passing fasteners (such as bolts, rivets, etc.) through the mounting hole 13 on the mounting member 11 to fixedly mount the stator core 1 wound with the coil 20 on the housing 21, it is possible to achieve the hole-free and bolt-free fixation of the core unit 10 on the stator core 1, which will not damage the magnetic circuit structure of the core unit 10 and ensure the magnetic conductivity of the stator core 1.

[0056] As above, applied to the technical solution of the present invention, a stator core provided by the present invention is assembled by a plurality of core units, and a design solution combining a split structure and an embedded assembly is adopted, avoiding the phenomena of lamination and interlayer sliding of the silicon steel sheets of the stator core, and no silicon steel sheet fault will be formed, ensuring the service performance of the stator core. At the same time, the coils on each core unit can be wound separately, solving the common problem of winding the coils of the disc motor stator core with semi-closed slots. The coils on a single core unit can be wound mechanically and automatically, improving the winding production efficiency and greatly increasing the slot fill factor, thereby improving the power density of the motor. In addition, the adjacent core units are assembled through the cooperation of the mounting member and the assembling part. The mounting member and the assembling part not only play the role of fixing and supporting the core unit, but also can undertake the role of the magnetic circuit channel of the yoke part of the stator core, and there is no need to add additional yoke magnetic conductors to ensure the magnetic conductivity of the stator core.

[0057] In summary, the above embodiments provided by the present invention only exemplarily illustrate the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A stator core, characterized in that, It includes a plurality of iron core units and mounting members. Assembly portions are provided on the opposite side surfaces of adjacent iron core units. The assembly portions extend in the radial direction of the stator iron core. The mounting members can cooperate with the assembly portions so that the iron core units are assembled circumferentially to form the stator iron core; One end of the iron core unit is provided with a first wing plate. The first wing plate protrudes from the side surface of the iron core unit and extends in the radial direction. The assembly portion includes a gap in the height direction between the coil on the iron core unit and the first wing plate, which is used to cooperate with the mounting member to press the first wing plates of adjacent iron core units, and the first wing plates of adjacent iron core units abut against each other.

2. The stator core according to claim 1, characterized in that, In the height direction, the assembly portion is provided at one end of the side surface of the iron core unit.

3. The stator core according to claim 1, characterized in that, The mounting member includes an extension portion. The extension portion is arranged in the radial direction and can be inserted into the assembly portion.

4. The stator core according to claim 3, characterized in that The mounting member further includes an annular portion. The annular portion extends in the circumferential direction, and the extension portion is arranged on the outer side of the annular portion in the radial direction.

5. The stator core according to claim 1 or 2, characterized in that The assembly portion includes a slot provided on the side surface of the iron core unit. The slot extends in the radial direction.

6. The stator core according to claim 5, characterized in that, The mounting member includes an insertion plate. The insertion plate can be inserted into the assembly portion in the radial direction.

7. The stator core according to claim 6, wherein, The mounting member includes a pressing plate for pressing the insertion plate.

8. The stator core according to claim 7, characterized in that, A plurality of openings are provided on the pressing plate. The iron core unit can be inserted into the openings, and the side surface of the iron core unit can be attached to the inner side surface of the openings.

9. The stator core according to claim 1, characterized in that, Mounting holes are provided on the mounting member for mounting the stator iron core.

10. The stator core according to claim 1, characterized in that, The mounting member is formed by axially laminating silicon steel sheets or soft magnetic composite materials.

11. A stator, characterized in that, It includes a coil and the stator iron core according to any one of claims 1-10. The coil is arranged on the iron core unit of the stator iron core.

12. The stator according to claim 11, characterized in that, It further includes a housing. The stator iron core is fixed in the housing through the mounting holes on the mounting member.

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