Stator core and stator winding
By setting slots and beveled designs around the pin holes in the core plate, the positioning accuracy and heat dissipation problems of the inorganic shell stator core are solved, enabling efficient and low-cost motor manufacturing.
Patent Information
- Application Number
- CN202520241849.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-14
AI Technical Summary
The positioning accuracy of the inorganic shell stator core is difficult to guarantee, and the traditional design causes deformation of the core surface, which affects the motor performance and life.
A groove is provided around the pin hole of the iron core plate to offset the stress generated when the positioning pin and the pin hole are interference-fitted. Combined with the bevel design and heat dissipation gap, the positioning accuracy and heat dissipation performance are improved.
It improves the positioning accuracy and heat dissipation performance of the inorganic shell stator core, reduces material usage and cost, and ensures the reliability and efficient operation of the motor.
Smart Images
Figure CN223744442U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, and in particular to a stator core and stator winding. Background Technology
[0002] The stator core is a crucial component of an electric motor, primarily responsible for magnetic conduction and electromagnetic induction. It is typically constructed from stacked, flat silicon steel sheets. As the power heart of a permanent magnet synchronous traction machine, the reliability of its connections and the accuracy of its positioning determine the motor's performance and lifespan. With the widespread application of permanent magnet synchronous traction machines and increasingly fierce market competition, higher standards have been set for the efficient, energy-saving, and environmentally friendly manufacturing of its core component, the stator winding.
[0003] Stator cores can be divided into two main categories: those with housings and those without. Those with housings have a housing with a stop, where the core is pressed into the housing until the stop is closed. Mounting bolts then tighten the housing onto the core end plates. The performance of the traction machine is ensured by the flatness and concentricity of the end plates. The advantages are ease of machining and ensuring dimensional tolerances; the disadvantages are high end plate cost and complex installation. Those without housings integrate the stator core and housing into a single design, where both are made of laminated silicon steel sheets. Locating pins pass through the core, and two end plates are welded to both ends of the core. The head of the locating pin is flush with the core, while the tail extends beyond the core to mate with the frame. The advantage of this integrated design is reduced cost; the disadvantage is that due to the material properties of silicon steel sheets, it is difficult to use an interference fit with the locating pin without deforming the core surface, making it difficult to guarantee the core positioning accuracy. Utility Model Content
[0004] The purpose of this invention is to provide a stator core and stator winding to improve the problem of difficulty in ensuring the positioning accuracy of existing shell-less stator cores.
[0005] The technical solutions for achieving the above objectives include the following:
[0006] The stator core includes an end plate, a core assembly, and a positioning pin. The core assembly is formed by stacking multiple core plates, and the end plate is fixed to at least one end of the core assembly.
[0007] The end plate is provided with a plurality of first pin holes, and the iron core plate is provided with a plurality of second pin holes, wherein the first pin holes correspond to the second pin holes;
[0008] The positioning pin passes through the first pin hole and the second pin hole, and the positioning pin is interference-fitted with the second pin hole. The core plate is provided with a slot that communicates with the second pin hole.
[0009] In one embodiment, the second pin hole is provided with two slots around its periphery. The slots are rectangular and are arranged opposite to each other.
[0010] In one embodiment, the core plate is a polygonal plate formed by beveling the corners of a quadrilateral plate, and the beveling of the corners of the quadrilateral plate forms a sloping wall.
[0011] In one embodiment, the inclined wall passes through the center of the second pin hole.
[0012] In one embodiment, the slot is orthogonal to the inclined wall.
[0013] In one embodiment, a protrusion is provided at the intersection of the second pin hole and the inclined wall.
[0014] In one embodiment, the intersection of the inclined wall and the second pin hole extends outward from the stator core to form a triangular tip, which is the protrusion.
[0015] In one embodiment, the core plate is diagonally cut to form a first oblique wall and a second oblique wall, and the center line connecting the first oblique wall and the second oblique wall forms a line of symmetry, and the lines of symmetry of two adjacent core plates intersect.
[0016] In one embodiment, the first inclined wall or the second inclined wall forms a heat dissipation gap between the two core plates or between the core plate and the end plate.
[0017] This utility model also proposes a stator winding, including any one of the stator cores and winding coils described above, wherein the stator core has a plurality of winding slots and the winding coils are installed in the winding slots.
[0018] The technical solution provided by this utility model has the following advantages and effects:
[0019] A groove is provided around the second pin hole of the core plate to communicate with the second pin hole. The groove is used to offset the stress generated when the positioning pin and the pin hole are interference-fitted, to prevent the surface of the core plate from deforming, and to improve the positioning accuracy of the inorganic shell stator core. Attached Figure Description
[0020] The accompanying drawings illustrate specific examples of the technical solutions described in this utility model, and together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this utility model.
[0021] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.
[0022] Figure 1 This is a perspective view of the stator core in this embodiment;
[0023] Figure 2 This is a perspective view of the end plate in this embodiment;
[0024] Figure 3 This is a perspective view of the core plate component in this embodiment;
[0025] Figure 4 for Figure 3 Enlarged view of the second pin hole at point A;
[0026] Figure 5 for Figure 3 Enlarged view of the second pin hole after the oblique cut at point B.
[0027] Explanation of reference numerals in the attached figures:
[0028] 10. End plate; 11. First pin hole;
[0029] 20. Iron core plate; 21. Second pin hole; 22. Groove; 23. First inclined wall; 24. Second inclined wall; 25. Protrusion.
[0030] 30. Locating pin; 40. Iron core assembly; 50. Heat dissipation gap. Detailed Implementation
[0031] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.
[0032] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.
[0033] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.
[0034] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.
[0035] To improve the positioning accuracy of inorganic shell stator cores, this invention modifies the structure of the pin holes by creating slots around the pin holes in the core plate that communicate with the pin holes. This counteracts the stress generated when the positioning pins and pin holes are interference-fitted, prevents surface deformation of the core plate, and improves the positioning accuracy of the stator core.
[0036] like Figure 1 As shown, this embodiment provides a stator core, including two end plates 10, five core plates 20, and four locating pins 30. The five core plates 20 are stacked together to form a core assembly 40. The two end plates 10 are pressed and welded to both ends of the core assembly 40. The locating pins 30 pass through the two end plates 10 and the five core plates 20 for mating with the machine frame. It should be noted that the number of core plates 20 is not limited; depending on the installation requirements, an end plate 10 can even be set at one end of the core assembly 40, with the head of the locating pin 30 located on one side of the end plate 10 and the tail of the locating pin 30 extending beyond the core assembly 40 to directly mate with the machine frame.
[0037] Specifically, the core plate 20 and the end plate 10 are shaped to match each other; the specific shape is not limited and can be quadrilateral, polygonal, circular, etc. In this embodiment, it is quadrilateral. Figure 2 As shown, the end plate 10 has first pin holes 11 at its four corners, as... Figure 3 As shown, a second pin hole 21 is also provided on the iron core plate 20 at the corresponding position. The first pin hole 11 and the second pin hole 21 are connected to form a channel through which the positioning pin 30 passes. After the positioning pin 30 passes through the first pin hole 11 and the second pin hole 21, it cooperates with the machine base.
[0038] Since the locating pin 30 and the second pin hole 21 are interference fit, in order to prevent surface deformation of the iron core plate 20, such as Figure 4 As shown, a slot 22 is provided on the core plate 20. The slot 22 is located around the second pin hole 21 and communicates with the second pin hole 21. The slot 22 is used to counteract the stress generated during the interference fit. Specifically, in this embodiment, two slots 22 are provided around the second pin hole 21. The slots 22 are rectangular and are arranged opposite to each other. It is easy to understand that the shape of the slots is not limited to rectangles, and the number of slots can also be set as needed. Usually, two symmetrically arranged slots can achieve the purpose of stress counteraction.
[0039] Therefore, unlike traditional pin holes, the second pin hole in this embodiment has an irregular design, which can effectively release the stress generated when it is engaged with the positioning pin. This allows the positioning pin to be smoothly pressed in even when the interference fit between the two is more aggressive, without causing deformation of the iron core, thus ensuring positioning accuracy and assembly reliability.
[0040] To improve the heat dissipation performance of the stator core, such as Figure 3As shown, in this embodiment, two opposite corners of the quadrilateral plate are beveled, that is, two opposite corners of the stator core laminations are removed during processing to form two beveled walls: a first beveled wall 23 and a second beveled wall 24. After beveling, the shape of the core plate 20 becomes a polygonal plate. Using this beveling method not only reduces material usage, lowers costs, and reduces the weight of the motor, but also creates a heat dissipation gap 50 between the two core plates 20 or between the core plate 20 and the end plate 10, increasing the contact area between the stator core and the air and improving heat dissipation efficiency. At the same time, the motor's shape remains cubic, reducing the risk of rollover during transportation and installation. It should be noted that beveled walls can also be formed by beveling at one, three, or four corners of the quadrilateral plate.
[0041] When stacking and assembling the obliquely cut core plates 20, this embodiment also rotates the core plates 20 sequentially by 90°. That is, taking the line connecting the centers of the first oblique wall 23 and the second oblique wall 24 of the core plate 20 as the line of symmetry, the lines of symmetry of two adjacent core plates 20 intersect. Since the core plates 20 are square before oblique cutting, the lines of symmetry of two adjacent core plates 20 are orthogonal. By using diagonal oblique cutting and rotational assembly, after the core plates 20 are installed, the four corners of the cubic core assembly 40 are recessed at intervals. In other words, there are heat dissipation gaps 50 at each of the four corners, allowing each corner to fully contact the air, improving heat dissipation performance, and without affecting the robustness of the stator core structure.
[0042] In this embodiment, when the core plate 20 is beveled, the first beveled wall 23 and the second beveled wall 24 also pass through the center of the second pin hole 21, at which point the second pin hole 21 is cut into a semi-circular hole. When the positioning pin 30 passes through these second pin holes 21, the stress generated by the interference fit is smaller, which more effectively prevents deformation of the surface of the core plate 20.
[0043] Preferably, when the second pin hole 21 is cut into a semi-circular hole, the extension direction of the slot 22 is set to be orthogonal to the first inclined wall 23 or the second inclined wall 24. Compared with other extension directions, the slot 22 can more effectively disperse the stress generated by the positioning pin 30 on the inner wall of the second pin hole 21.
[0044] To ensure the overall mechanical strength of the stator core, such as Figure 5 As shown, a protrusion 25 is provided at the intersection of the second pin hole 21 and the first inclined wall 23 or the second inclined wall 24. By designing two protrusions 25 at the semicircular part of the stator core lamination, the positioning pin 30 can be easily welded to the second pin hole 21 after being pressed into the semicircular second pin hole 21, thereby strengthening the overall mechanical strength of the stator core.
[0045] Specifically, in this embodiment, the protrusion 25 is a triangular tip in the shape of a triangular prism, formed by extending outward from the intersection of the first inclined wall 23 or the second inclined wall 24 and the second pin hole 21. The two triangular tips at the semicircle of the stator core lamination facilitate welding.
[0046] In this embodiment, during stator core assembly, the five core plates are first rotated 90° sequentially and placed into the fixture. Then, the end plates are pressed together at both ends, and locating pins are inserted. Welding is then performed at the exposed positions of the locating pins. Finally, the assembled stator core is fitted to the machine base via the locating pins. This method offers high reliability and ease of assembly.
[0047] In summary, this embodiment, through the design of the structure and fit of the core plate and positioning pin, ensures the concentricity and perpendicularity of the integrated stator core and the main unit in a simpler and more efficient way, thus guaranteeing the positioning accuracy of the stator core.
[0048] Based on the stator core described above, this utility model also provides a stator winding, including the stator core and winding coils described above. The stator core has multiple winding slots, and winding coils are installed in the winding slots.
[0049] By optimizing the stator core structure of the steel belt traction machine, the fit accuracy between the steel belt traction machine core and the machine base can be ensured in a more efficient and convenient way, reducing the amount of material used, thereby achieving the goals of reducing costs and weight, improving heat dissipation, and ensuring the advanced nature of core manufacturing.
[0050] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.
[0051] The purpose of the above embodiments is to reproduce and derive the technical solution of this utility model by way of example, and to fully describe the technical solution, purpose and effect of this utility model. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosed content of this utility model, and it is not intended to limit the protection scope of this utility model.
[0052] The above embodiments are not an exhaustive list based on the present invention, and there may be other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.
Claims
1. A stator core characterized by, The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
2. The stator core of claim 1, wherein The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
3. The stator core of claim 2, wherein The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
4. The stator core of claim 3, wherein The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
5. The stator core of claim 4, wherein The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
6. The stator core of claim 4, wherein The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
7. The stator core of claim 6, wherein The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
8. The stator core of any of claims 3-7, wherein, The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
9. The stator core of claim 8, wherein The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot.
10. A stator winding characterised by, The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator core and winding coil, and the stator core is provided with a plurality of winding slots, and the winding coil is installed in the winding slot. The utility model relates to a kind of stator