A stator lamination, stator core, stator and motor

Abstract

This invention provides a stator lamination, a stator core, a stator, and a motor. By arranging the first protrusion on the inner lamination and the second protrusion on the outer lamination in an alternating manner, adjacent first and second protrusions form a closed groove, which effectively reduces the precision requirements of the stator lamination, improves production efficiency, reduces production difficulty, and improves the structural strength of the stator core.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, specifically relating to a stator lamination, a stator core, a stator, and a motor. Background Technology

[0002] Currently, AC single-phase asynchronous motors are commonly used in the field of air conditioner outdoor unit motors. This is mainly due to their advantages such as low cost and high reliability. However, with the progress and development of the industry and the improvement of product energy efficiency requirements, ordinary AC single-phase asynchronous motors are gradually unable to meet the requirements after the energy efficiency upgrade. While DC products can fully meet the requirements of energy efficiency upgrade, the significant increase in the control cost of DC motor products leads to a decline in product competitiveness and an inability to meet customer needs.

[0003] Existing technologies have made various improvements to the lamination structure, including magnetic yoke separation structure and phase separation structure. However, these structural methods currently have high requirements for lamination precision. The higher the precision requirements of the lamination structure, the more detrimental it is to actual production. Summary of the Invention

[0004] Therefore, the present invention provides a stator lamination that, by arranging the first protrusion on the inner lamination and the second protrusion on the outer lamination in an alternating manner, forms a closed groove between adjacent first and second protrusions, effectively reducing the precision requirements of the stator lamination and improving the structural strength of the stator core.

[0005] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a stator lamination comprising an inner lamination and an outer lamination that cooperate with each other. The inner lamination includes an inner ring of the stator and a plurality of first protrusions spaced apart along the outer periphery of the inner ring. The outer lamination includes an outer ring of the stator and a plurality of second protrusions spaced apart along the inner periphery of the outer ring. The first protrusions and second protrusions are arranged alternately, and adjacent first protrusions and second protrusions form a closed groove.

[0006] In some embodiments, a first protrusion is provided between two adjacent first protrusions, and a first groove matching the first protrusion is provided on the second protrusion. The first protrusion and the first groove connect the inner layer sheet and the outer layer sheet.

[0007] In some embodiments, a second protrusion is provided between two adjacent second protrusions, and a second groove matching the second protrusion is provided on the first protrusion. The second protrusion and the second groove connect the inner layer sheet and the outer layer sheet.

[0008] In some embodiments, the first protrusion is divided into a first winding portion connected to the inner ring of the stator and a first mating portion connected to the outer ring of the stator along the radial direction of the inner lamination. The second protrusion is divided into a second winding portion connected to the outer ring of the stator and a second mating portion connected to the inner ring of the stator along the radial direction of the outer lamination. Adjacent first winding portions and second mating portions form a first closed groove, and adjacent second winding portions and first mating portions form a second closed groove.

[0009] The present invention also provides a stator core comprising the stator laminations described above.

[0010] In some embodiments, the inner laminations are stacked to form an inner core, the outer laminations are stacked to form an outer core, a plurality of first winding portions of the inner core are stacked to form a first winding platform, an inner winding is wound on the first winding platform, a plurality of second winding portions of the outer core are stacked to form a second winding platform, an outer winding is wound on the second winding platform, the inner winding passes through two first closed slots on both sides of the first winding platform, and the outer winding passes through two second closed slots on both sides of the second winding platform.

[0011] The present invention also provides a stator, including a stator core, wherein the stator core is the stator core described above.

[0012] The present invention also provides an electric motor, including an electric motor stator, wherein the electric motor stator is the stator described above.

[0013] The present invention provides a stator lamination, a stator core, a stator, and a motor, which, based on the phase separation design direction and the characteristics of the stator winding embedding structure of a single-phase asynchronous motor, effectively improves the structural strength of the lamination while meeting the actual production and use requirements of the stator winding, greatly ensuring the quality of the product manufacturing process. At the same time, it achieves effective optimization and improvement of the magnetic density of the lamination teeth, further optimizing the problem of abnormal tooth harmonic noise.

[0014] The above description is only an overview of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the stator lamination structure provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the outer stator lamination provided in an embodiment of the present invention;

[0017] Figure 3This is a schematic diagram of the structure of the inner stator lamination in the stator lamination provided in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of the outer stator core in the stator core provided in an embodiment of the present invention;

[0019] Figure 5 This is a partially enlarged schematic diagram of point A in the outer stator core of the stator core provided in an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of the inner stator core in the stator core provided in an embodiment of the present invention;

[0021] Figure 7 This is a partially enlarged schematic diagram of point B in the inner stator core of the stator core provided in an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the structure of the plastic-coated outer stator core provided in an embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of the structure of the outer stator core with plastic coating and outer winding provided in an embodiment of the present invention;

[0024] Figure 10 This is a top view of the outer stator core with the outer layer winding after plastic coating, provided in an embodiment of the present invention.

[0025] Figure 11 This is a schematic diagram of the structure of the plastic-coated inner stator core provided in an embodiment of the present invention;

[0026] Figure 12 This is a schematic diagram of the structure of the inner stator core with inner layer winding after plastic coating, provided in an embodiment of the present invention;

[0027] Figure 13 This is a top view of the inner stator core with inner layer windings after plastic coating, provided in an embodiment of the present invention.

[0028] Figure 14 This is a schematic diagram of the stator structure provided in an embodiment of the present invention;

[0029] Figure 15 A top view of the stator provided in an embodiment of the present invention;

[0030] Figure 16 A side view of the stator provided in an embodiment of the present invention.

[0031] The reference numerals in the attached figures are as follows:

[0032] 1. Inner lamination; 2. Outer lamination; 3. First winding platform; 4. Second winding platform; 5. Limiting plate; 6. Outer winding positioning pin; 7. Inner winding limiting post; 11. Stator inner ring; 12. First protrusion; 13. First protrusion; 14. Second protrusion; 21. Stator outer ring; 22. Second protrusion; 23. First groove; 24. Second groove; 31. Inner winding; 41. Outer winding; 111. First winding section; 112. First mating section; 211. Second winding section; 212. Second mating section. Detailed Implementation

[0033] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0034] In the description of this invention, it should be clearly stated that the terms "vertical", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal", etc., which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] See also Figures 1 to 3 According to an embodiment of the present invention, a stator lamination is provided, comprising an inner lamination 1 and an outer lamination 2 that cooperate with each other. The inner lamination 1 includes a stator inner ring 11 and a plurality of first protrusions 12 spaced apart along the outer periphery of the stator inner ring 11. The outer lamination 2 includes a stator outer ring 21 and a plurality of second protrusions 22 spaced apart along the inner periphery of the stator outer ring 21. The first protrusions 12 and the second protrusions 22 are arranged alternately, and adjacent first protrusions 12 and second protrusions 22 form a closed groove.

[0037] Specifically, the staggered arrangement of protruding structures provides higher support strength and less gap between structures, effectively preventing tangential deformation and significantly increasing structural strength. Furthermore, the operation of a single-phase asynchronous motor is achieved through the rotation of a magnetic field, and the magnetic field lines in the motor's magnetic field are typically conducted through a silicon steel core. Therefore, under the same magnetic field strength, the silicon steel material used in the structure of this invention has a larger area, lower magnetic flux density, less vibration, and quieter motor operation. Moreover, the protruding edges in this invention have lower precision requirements, which is beneficial for actual production.

[0038] Furthermore, a first protrusion 13 is provided between two adjacent first protrusions 12, and a first groove 23 matching the first protrusion 13 is provided on the second protrusion 22. The first protrusion 13 and the first groove 23 connect the inner layer sheet 1 and the outer layer sheet 2.

[0039] Specifically, a groove is formed between two adjacent first protrusions 12, and a first protrusion 13 is disposed on the outer peripheral side of the stator inner ring in the groove. A first groove 23 matching the first protrusion 13 is provided on the second protrusion 22. In this embodiment, the first groove 23 is preferably set as a dovetail groove. The second protrusion 22 is fitted into the first groove 23, which improves the connection strength and reliability of the inner lamination 1 and the outer lamination 2.

[0040] In some embodiments, a second protrusion 14 is provided between two adjacent second protrusions 22, and a second groove 24 matching the second protrusion 14 is provided on the first protrusion 12. The second protrusion 14 and the second groove 24 connect the inner layer sheet 1 and the outer layer sheet 2. This further improves the connection strength and reliability between the inner layer sheet 1 and the outer layer sheet 2.

[0041] In some embodiments, the first protrusion 12 is divided along the radial direction of the inner lamination 1 into a first winding portion 111 connected to the inner ring 11 of the stator and a first mating portion 112 connected to the outer ring 21 of the stator. The second protrusion 22 is divided along the radial direction of the outer lamination 2 into a second winding portion 211 connected to the outer ring 21 of the stator and a second mating portion 212 connected to the inner ring 11 of the stator. Adjacent first winding portions 111 and second mating portions 212 form a first closed groove 311, and adjacent second winding portions 211 and first mating portions 112 form a second closed groove 312.

[0042] Specifically, the first winding section 111 and the second winding section 211 are designed to provide crucial positioning support for the winding in subsequent winding processes, in conjunction with the skeleton structure. The first closed slot 311 and the second closed slot 312 effectively abut against the first protrusion 12 and the second protrusion 22, enhancing the strength of the stator laminations and effectively fixing the windings to prevent them from unraveling. Simultaneously, the abutment between the first protrusion 12 and the second protrusion 22 also provides auxiliary positioning for the assembly of the inner lamination 1 and the outer lamination 2. Besides the advantage of a simplified structure, the separate first closed slot 311 and the second closed slot also provide good magnetic conductivity for the core mating portion between the two slots, in addition to the main magnetic circuit in the middle.

[0043] According to embodiments of the present invention, a stator core is also provided, comprising the stator laminations described above. Specifically, as... Figures 4 to 16 As shown, inner laminations 1 are stacked to form an inner core, outer laminations 2 are stacked to form an outer core, multiple first winding portions 111 of the inner core are stacked to form a first winding platform 3, an inner winding 31 is wound on the first winding platform 3, multiple second winding portions 211 of the outer core are stacked to form a second winding platform 4, an outer winding 41 is wound on the second winding platform 4, the inner winding 31 passes through two first closed slots on both sides of the first winding platform 3, and the outer winding 41 passes through two second closed slots on both sides of the second winding platform 4.

[0044] Specifically, high-pressure punching equipment is used to punch and stack the inner and outer core materials; plastic coating equipment is used to complete the plastic coating skeleton on the core; the inner and outer skeletons are distinguished according to the core stack thickness and its shape, the outer core has the outer skeleton, and the inner core has the inner skeleton. The skeleton effectively insulates the exposed part of the core and can avoid direct contact between the winding and the core, providing insulation, positioning and subsequent PCB circuit board positioning and installation functions for the winding and core.

[0045] Furthermore, a limiting baffle is provided to better improve the insulation effect between the winding and the iron core, and to position the winding. The technical solution of this invention can realize the simultaneous winding of the inner layer winding 31 and the outer layer winding 41, improving winding efficiency. In subsequent processes, an outer winding positioning pin 6 is provided on the outer frame, and an inner winding limiting post 7 is provided on the inner frame. The inner winding limiting post 7 can prevent the rotor assembly from being affected when the inner winding is lower than the inner diameter of the iron core. The winding wire ends can be fixed by the outer winding positioning pin 6, and the winding connection is achieved by soldering through the PCB circuit board. The outer iron core after the outer layer winding 41 is wound is assembled axially with the inner iron core after the inner layer winding 31 is wound, and the stator iron core is formed after the assembly is completed.

[0046] According to an embodiment of the present invention, a stator is also provided, comprising the stator core described above.

[0047] According to an embodiment of the present invention, an electric motor is also provided, including a motor stator, wherein the motor stator is the stator described above.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention. It will be readily understood by those skilled in the art that, without conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

Claims

1. A stator lamination, characterized in that, The device includes an inner lamination (1) and an outer lamination (2) that cooperate with each other. The inner lamination (1) includes a stator inner ring (11) and a plurality of first protrusions (12) spaced apart along the outer periphery of the stator inner ring (11). The outer lamination (2) includes a stator outer ring (21) and a plurality of second protrusions (22) spaced apart along the inner periphery of the stator outer ring (21). The first protrusions (12) and the second protrusions (22) are arranged alternately, and adjacent first protrusions (12) and second protrusions (22) form a closed groove. The first protrusion (12) is divided into a first winding portion (111) connected to the inner ring (11) of the stator and a first mating portion (112) connected to the outer ring (21) of the stator along the radial direction of the inner lamination (1). The second protrusion (22) is divided into a second winding portion (211) connected to the outer ring (21) of the stator and a second mating portion (212) connected to the inner ring (11) of the stator along the radial direction of the outer lamination (2). The adjacent first winding portion (111) and the second mating portion (212) form a first closed groove, and the adjacent second winding portion (211) and the first mating portion (112) form a second closed groove.

2. The stator lamination according to claim 1, characterized in that, A first protrusion (13) is provided between two adjacent first protrusions (12), and a first groove (23) matching the first protrusion (13) is provided on the second protrusion (22). The first protrusion (13) and the first groove (23) connect the inner layer sheet (1) and the outer layer sheet (2).

3. The stator lamination according to claim 1 or 2, characterized in that, A second protrusion (14) is provided between two adjacent second protrusions (22), and a second groove (24) matching the second protrusion (14) is provided on the first protrusion (12). The second protrusion (14) and the second groove (24) connect the inner layer sheet (1) and the outer layer sheet (2).

4. A stator core comprising stacked stator laminations, characterized in that, The stator lamination is a stator lamination according to any one of claims 1 to 3.

5. The stator core according to claim 4, characterized in that, The inner laminations (1) are stacked to form an inner core, and the outer laminations (2) are stacked to form an outer core. The multiple first winding portions (111) of the inner core are stacked to form a first winding platform (3). An inner winding (31) is wound on the first winding platform (3). The multiple second winding portions (211) of the outer core are stacked to form a second winding platform (4). An outer winding (41) is wound on the second winding platform (4). The inner winding (31) passes through two first closed slots on both sides of the first winding platform (3), and the outer winding (41) passes through two second closed slots on both sides of the second winding platform (4).

6. A stator, comprising a stator core, characterized in that, The stator core is the stator core according to claim 4 or 5.

7. An electric motor, comprising a stator, characterized in that, The stator is the stator according to claim 6.

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