Insulation framework and insulation paper for motor stator core

Abstract

The utility model discloses an insulation skeleton and insulation paper used for a motor stator core, comprising two skeleton main bodies and a skeleton upper edge plate, one end of the skeleton upper edge plate is connected with an end plate upper edge plate, the lower end of the end plate upper edge plate is provided with an end plate support plate, and the end plate support plate is provided with an end plate. The lower end of the end plate supporting plate is connected with an end plate lower edge plate, the rear side surface of the end plate lower edge plate is connected with one end of a framework lower edge plate, the end plate upper edge plate, the end plate lower edge plate and the end plate supporting plate form a framework end plate, grooves are formed in the outer surface of the end plate supporting plate at equal intervals, and the multiple grooves form an end plate groove. According to the insulating framework and the insulating paper for the motor stator core, the stator core main body and the insulating paper main body are arranged in an attached manner, so that the winding space can be increased, no gap exists between the bottom surface of the stator core and the side surface of the stator core, the slot filling rate is increased, and the motor performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an insulating skeleton and insulating paper for a motor stator core. Background Technique

[0002] The slot fill factor of a motor is an important performance index in the field of motor design and manufacturing, which reflects the ratio of the area occupied by the motor winding to the total area in the slot. A higher slot fill factor has a significant positive impact on the motor performance. Under specific design conditions, when the slot fill factor of the motor reaches its maximum value that can be wound, the physical length of the motor can be effectively shortened, thereby minimizing the volume of the motor. By increasing the slot fill factor of the motor, not only can the miniaturization of the motor be promoted, but also the amount of material used can be reduced, thereby reducing the production cost. This is a direct and effective optimization approach. In the existing motor technology, the slot fill factor of the winding is restricted by the thickness of the insulating skeleton. With the increasing demand for motor miniaturization, the power density of the motor continues to increase, which requires a corresponding increase in the slot fill factor of the motor. A common method is to increase the slot space by reducing the thickness of the insulating skeleton, thereby increasing the slot fill factor. However, for the traditional front-back inserted stator core insulating skeleton, due to the limitations of materials and injection molding processes, its thickness has approached the manufacturing limit. Further reducing the thickness not only has difficulties in molding, but also the thickening of the insulating skeleton will reduce the heat dissipation efficiency of the motor, thereby having an adverse impact on the temperature rise performance of the motor. Although the use of advanced processing techniques can achieve the thinning of the integrated injection molded skeleton, this method has a relatively high production cost, and the complexity of the manufacturing process increases the production difficulty, thereby affecting the production efficiency of the motor. In addition, the instability of product quality also leads to a relatively high scrap cost. On the other hand, the slot fill factor of the motor winding is also restricted by the shape of the stator core. In order to improve production efficiency, motor manufacturers usually use split T-shaped punching stator cores to manufacture prototypes, but this method will further reduce the slot fill factor of the motor, thereby affecting the overall performance and efficiency of the motor.

[0003] In the field of motors, in order to optimize the insulation performance of the motor, a common method is to set insulating paper in the slot of the stator core to optimize the insulation between the wire and the stator core. The insulating paper is generally used in combination with the insulating skeleton. However, the existing insulating paper has a short length, generally the same as the length of the stator core, resulting in gaps between the insulating skeleton and the insulating paper at the bottom of the stator core slot and the junctions at both ends of the stator core slot after removing the material at the bottom of the insulating skeleton slot, resulting in a reduction in insulation performance. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide an insulating frame and insulating paper for a motor stator core, so as to solve the problem proposed in the above background technology that there is a gap between the insulating frame and the insulating paper at the junction of the stator core slot bottom and the two ends of the stator core slot, resulting in reduced insulation performance.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an insulating skeleton for a motor stator core, comprising a skeleton main body, two skeleton main bodies, and a skeleton upper edge plate, one end of the skeleton upper edge plate is connected to the end plate upper edge plate, the lower end of the end plate upper edge plate is installed with an end plate support plate, the lower end of the end plate support plate is connected to the end plate lower edge plate, the rear side surface of the end plate lower edge plate is connected to one end of the skeleton lower edge plate, the end plate upper edge plate, the end plate lower edge plate and the end plate support plate constitute a skeleton end plate, the outer surface of the end plate support plate is provided with grooves at equal intervals, a plurality of the grooves constitute an end plate groove, a winding groove is opened through the upper surface of the end plate upper edge plate, and a stator winding is provided between the end plate upper edge plate and the end plate lower edge plate.

[0006] Preferably, the upper edge plate of the skeleton, the lower edge plate of the skeleton and the end plates of the skeleton form a skeleton main body, and the center positions of the two skeleton main bodies connected to each other form a limiting clamping groove.

[0007] By adopting the above technical solution, the skeleton body is inserted into each other to form a limiting clip groove adapted to the stator core body.

[0008] Preferably, the limiting clamp groove is configured as an I-shaped structure with a hollow groove bottom.

[0009] The above technical solution is adapted to the stator core body.

[0010] Preferably, the bottom surface of the upper edge plate of the skeleton and the bottom surface of the upper edge plate of the end plate are located in the same horizontal plane, and the top surface of the upper edge plate of the end plate is higher than the top surface of the upper edge plate of the skeleton.

[0011] The above technical solution is adopted to facilitate the docking of two skeleton bodies.

[0012] Preferably, the top surface of the lower edge plate of the frame and the top surface of the lower edge plate of the end plate are located at the same horizontal plane, and the bottom surface of the lower edge plate of the end plate is higher than the bottom surface of the lower edge plate of the frame.

[0013] The above technical solution is adopted to make the bonding with the insulating paper body more closely.

[0014] An insulating paper for a motor stator core comprises an insulating paper main body, which is laminated between a frame main body and a stator core main body, and a stator core main body, which is embedded between limiting clip grooves.

[0015] Preferably, the outer surface of the stator core body is divided into an upper edge surface of the stator core, a radian surface of the stator core, a bottom surface of the stator core, a lower edge surface of the stator core, and a side surface of the stator core. The outer surface of the stator core body is attached to each surface of the insulating paper body.

[0016] Adopting the above technical solution enables the stator core body and the insulating paper body to be correspondingly attached.

[0017] Preferably, the insulating paper body is provided with an upper edge surface of the insulating paper. The upper edge surface of the insulating paper is attached to the upper edge surface of the stator core. One side of the upper edge surface of the insulating paper is connected to a radian surface of the insulating paper, and the other side of the upper edge surface of the insulating paper is connected to an insulating surface of the insulating paper. The other end of the radian surface of the insulating paper is connected to a bottom surface of the insulating paper. The radian surface of the insulating paper is attached to the radian surface of the stator core. The bottom surface of the insulating paper is attached to the bottom surface of the stator core. Both sides of the bottom surface of the insulating paper are connected to insulating paper sealing surfaces. The two insulating paper sealing surfaces are respectively attached to the side surfaces of the stator core of the stator core body. The lower end of the bottom surface of the insulating paper is connected to a lower edge surface of the insulating paper. The lower edge surface of the insulating paper is attached to the lower edge surface of the stator core.

[0018] Adopting the above technical solution, by attaching the insulating paper body to the stator core body, there is no gap between the bottom surface of the stator core and the side surface of the stator core and the skeleton body.

[0019] Preferably, the upper edge plate of the skeleton is positioned and attached to the lower surface of the upper edge surface of the insulating paper. The upper edge plate of the skeleton is provided with a radian corresponding to the radian surface of the stator core and the radian surface of the insulating paper. The radian surface of the insulating paper is positioned and attached to the lower surface of the arc surface of the upper edge plate of the skeleton. The lower edge plate of the skeleton is positioned and attached to the upper surface of the lower edge surface of the insulating paper. The outer surface of the end plate support plate is attached and connected to the insulating paper sealing surface.

[0020] Adopting the above technical solution facilitates the corresponding attachment between the insulating paper body and the skeleton body.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows: The insulating skeleton and insulating paper for the motor stator core:

[0022] 1. The material in contact with the bottom of the slot of the stator core body of the insulating skeleton and insulating paper for the motor stator core is removed, and the insulating paper body is used instead. While saving materials, the slot filling rate of the stator winding is improved, which is beneficial to improving the heat dissipation capacity of the motor and making the temperature rise performance of the motor better;

[0023] 2. Further, the end plate grooves provided on the outer surface of the end plate support plate can make the winding arrangement neat, thus avoiding the appearance of a disorderly situation and greatly improving the overall aesthetics and regularity;

[0024] 3. Further, providing a wire winding groove along the plate on the end plate can fix the starting point of the wire winding, ensuring a stable position at the beginning of the wire winding, avoiding loose wire winding, and also making the stator winding more compact, further improving the slot fill factor. Description of the Drawings

[0025] Figure 1 Schematic diagram of the mating structure of the skeleton main body and the insulating paper main body of the present utility model;

[0026] Figure 2 Schematic diagram of the butt joint structure of the skeleton main body of the present utility model;

[0027] Figure 3 Schematic diagram of the axonometric surface structure of the skeleton main body of the present utility model;

[0028] Figure 4 Schematic diagram of the axonometric surface structure of the insulating paper of the present utility model;

[0029] Figure 5 Schematic diagram of the mating structure of the insulating paper main body and the stator core main body of the present utility model;

[0030] Figure 6 Schematic diagram of the mating structure of the insulating paper main body and the skeleton main body of the present utility model;

[0031] Figure 7 Schematic diagram of the structure of the insulating paper main body, the skeleton main body and the stator core insulating main body of the present utility model;

[0032] Figure 8 Schematic diagram of the structure of the skeleton main body and the stator winding of the present utility model;

[0033] Figure 9 Schematic diagram of the front cross-section structure of the skeleton main body of the present utility model.

[0034] In the figure: 1. Skeleton main body; 2. Insulating paper main body; 3. Upper edge plate of the skeleton; 4. Lower edge plate of the skeleton; 5. End plate of the skeleton; 6. Limit clamping groove; 7. Upper edge plate of the end plate; 8. Lower edge plate of the end plate; 9. End plate support plate; 10. Upper surface of the insulating paper; 11. Radian surface of the insulating paper; 12. Bottom surface of the insulating paper; 13. Lower edge surface of the insulating paper; 14. Isolation surface of the insulating paper; 15. Sealing surface of the insulating paper; 16. Upper surface of the stator core; 17. Radian surface of the stator core; 18. Bottom surface of the stator core; 19. Lower edge surface of the stator core; 20. Side surface of the stator core; 21. Stator core main body; 22. Stator winding; 23. Groove; 24. End plate groove; 25. Wire winding groove. Detailed Implementation Manner

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] Please refer to Figures 1-9 , the present utility model provides a technical solution: an insulating skeleton and insulating paper for a motor stator core, including a skeleton main body 1, an insulating paper main body 2, an upper edge plate 3 of the skeleton, a lower edge plate 4 of the skeleton, an end plate 5 of the skeleton, a limiting clamping groove 6, an upper edge plate 7 of the end plate, a lower edge plate 8 of the end plate, a support plate 9 of the end plate, an upper surface 10 of the insulating paper, a curved surface 11 of the insulating paper, a bottom surface 12 of the insulating paper, a lower edge surface 13 of the insulating paper, an insulating surface 14 of the insulating paper, a sealing surface 15 of the insulating paper, an upper surface 16 of the stator core, a curved surface 17 of the stator core, a bottom surface 18 of the stator core, a lower edge surface 19 of the stator core, a side surface 20 of the stator core, a stator core main body 21, a stator winding 22, a groove 23, an end plate groove 24, and a winding groove 25.

[0037] Embodiment 1: The insulating skeleton and insulating paper for the motor stator core are adhesively installed between the skeleton main body 1 and the stator core main body 21 through the insulating paper main body 2 to fill the gap. Specifically:

[0038] There are 2 main body skeletons 1, and it also includes an upper edge plate 3 of the skeleton. One end of the upper edge plate 3 of the skeleton is connected to the upper edge plate 7 of the end plate. The lower end of the upper edge plate 7 of the end plate is installed with a support plate 9 of the end plate. The lower end of the support plate 9 of the end plate is connected to the lower edge plate 8 of the end plate. The rear surface of the lower edge plate 8 of the end plate is connected to one end of the lower edge plate 4 of the skeleton. The upper edge plate 7 of the end plate, the lower edge plate 8 of the end plate and the support plate 9 of the end plate form the end plate 5 of the skeleton. The outer surface of the support plate 9 of the end plate is provided with grooves 23 at equal intervals, and a plurality of grooves 23 form a groove 24 of the end plate. A wire winding groove 25 is opened through the upper surface of the upper edge plate 7 of the end plate. A stator winding 22 is arranged between the upper edge plate 7 of the end plate and the lower edge plate 8 of the end plate. The upper edge plate 3 of the skeleton, the lower edge plate 4 of the skeleton and the end plate 5 of the skeleton form the main body skeleton 1. The central position of the butt joint connection of the 2 main body skeletons 1 forms a limiting clamping groove 6. The limiting clamping groove 6 is set as an I-shaped structure with a hollow bottom. The bottom surface of the upper edge plate 3 of the skeleton and the bottom surface of the upper edge plate 7 of the end plate are on the same horizontal plane. The top surface of the upper edge plate 7 of the end plate is higher than the top surface of the upper edge plate 3 of the skeleton. The top surface of the lower edge plate 4 of the skeleton and the top surface of the lower edge plate 8 of the end plate are on the same horizontal plane. The bottom surface of the lower edge plate 8 of the end plate is higher than the bottom surface of the lower edge plate 4 of the skeleton. An insulating paper main body 2 is attached between the main body skeleton 1 and the main body 21 of the stator core. It also includes the main body 21 of the stator core. The main body 21 of the stator core is embedded and installed between the limiting clamping grooves 6. The insulating paper main body 2 is provided with an upper surface 10 of the insulating paper. The upper surface 10 of the insulating paper is attached to the upper surface 16 of the stator core. One side of the upper surface 10 of the insulating paper is connected to a curved surface 11 of the insulating paper. The other side of the upper surface 10 of the insulating paper is connected to an insulating surface 14 of the insulating paper. The other end of the curved surface 11 of the insulating paper is connected to a bottom surface 12 of the insulating paper. The curved surface 11 of the insulating paper is attached to the curved surface 17 of the stator core. The bottom surface 12 of the insulating paper is attached to the bottom surface 18 of the stator core. Both sides of the bottom surface 12 of the insulating paper are connected to a sealing surface 15 of the insulating paper. The 2 sealing surfaces 15 of the insulating paper are respectively attached to the side surface 20 of the stator core of the main body 21 of the stator core. The lower end of the bottom surface 12 of the insulating paper is connected to a lower edge surface 13 of the insulating paper. The lower edge surface 13 of the insulating paper is attached to the lower edge surface 19 of the stator core. The upper edge plate 3 of the skeleton is positioned and attached to the lower surface of the upper surface 10 of the insulating paper. The upper edge plate 3 of the skeleton is provided with a curvature corresponding to the curved surface 17 of the stator core and the curved surface 11 of the insulating paper. The curved surface 11 of the insulating paper is positioned and attached to the lower surface of the curved surface of the upper edge plate 3 of the skeleton. The lower edge plate 4 of the skeleton is positioned and attached to the upper surface of the lower edge surface 13 of the insulating paper. The outer surface of the support plate 9 of the end plate is attached and connected to the sealing surface 15 of the insulating paper;

[0039] When the insulating skeleton and insulating paper for the motor stator core are in use, first, two insulating paper bodies 2 are respectively attached to the stator core body 21. Among them, the upper edge surface 10 of the insulating paper is attached to the upper edge surface 16 of the stator core, the arc surface 11 of the insulating paper is attached to the arc surface 17 of the stator core, the bottom surface 12 of the insulating paper is attached to the bottom surface 18 of the stator core, the lower edge surface 13 of the insulating paper is attached to the lower edge surface 19 of the stator core, and the two insulating paper sealing surfaces 15 are respectively attached to the stator core side surfaces 20 on both sides of the stator core body 21. Then, with one hand fixing the insulating paper body 2 and the stator core body 21, the other hand takes out the skeleton body 1 and inserts it into the stator core body 21 protected by the insulating paper body 2. Among them, the upper edge plate 3 of the skeleton of the skeleton body 1 is attached to the upper edge surface 10 of the insulating paper to position and fix it. The upper edge plate 3 of the skeleton of the skeleton body 1 has a curvature adapted to the arc surface 17 of the stator core and the arc surface 11 of the insulating paper, and can position and fix the arc surface 11 of the insulating paper. The lower edge plate 4 of the skeleton of the skeleton body 1 is attached to the lower edge surface 13 of the insulating paper to position and fix it. The end plate 5 of the skeleton of the skeleton body 1 is attached to the insulating paper sealing surface 15 to position and fix it. During the above positioning and fixing process, only the insulating paper body 2 covers the bottom surface 18 of the stator core, and there is no covering of the skeleton body 1, which is beneficial to increasing the winding space and improving the slot fill factor. The bottom surface 12 of the insulating paper and the insulating paper sealing surface 15 can ensure that there is no gap between the bottom surface 18 of the stator core and the stator core side surface 20, and avoid the stator core body 21 being punctured due to the gap between the bottom surface 12 of the insulating paper and the end plate support plate 9;

[0040] Then, take out another skeleton body 1 and insert it from the other end of the stator core body 21 protected by the insulating paper body 2, so that a limiting clamping groove 6 is formed between the two skeleton bodies 1, and the stator core body 21 and the insulating paper body 2 are between the limiting clamping grooves 6. Further, when winding, first wind several turns in the winding groove 25, which can not only fix the winding starting point, but also make the stator winding 22 more compact, further improving the slot fill factor. And when winding, the end plate groove 24 can provide a positioning function for the stator winding 22, facilitating the stator winding 22 to be wound around the skeleton body 1 orderly, and the fillet treatment is beneficial to protecting the winding.

[0041] Working principle: When using the insulating skeleton and insulating paper for the motor stator core, by arranging the insulating paper body 2 between the skeleton body 1 and the stator core body 21, the slot fill factor is increased, the cost is reduced, and the overall practicability is increased.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An insulating skeleton for a motor stator core, comprising a skeleton main body (1), and there are 2 of the skeleton main bodies (1), characterized in that: It further includes a skeleton upper edge plate (3), one end of the skeleton upper edge plate (3) is connected to an end plate upper edge plate (7), an end plate support plate (9) is installed at the lower end of the end plate upper edge plate (7), the lower end of the end plate support plate (9) is connected to an end plate lower edge plate (8), the rear side surface of the end plate lower edge plate (8) is connected to one end of a skeleton lower edge plate (4), the end plate upper edge plate (7), the end plate lower edge plate (8) and the end plate support plate (9) form a skeleton end plate (5), grooves (23) are equidistantly arranged on the outer surface of the end plate support plate (9), and a plurality of the grooves (23) form an end plate groove (24), a wire winding groove (25) is formed through the upper surface of the end plate upper edge plate (7), and a stator winding (22) is arranged between the end plate upper edge plate (7) and the end plate lower edge plate (8).

2. The insulating skeleton for a motor stator core according to claim 1, characterized in that: The skeleton upper edge plate (3), the skeleton lower edge plate (4) and the skeleton end plate (5) form a skeleton main body (1), and a limit clamping groove (6) is formed at the central position where two of the skeleton main bodies (1) are inserted and connected to each other.

3. The insulating skeleton for a motor stator core according to claim 2, characterized in that: The limit clamping groove (6) is arranged in an I-shaped structure with a hollow bottom.

4. An insulating skeleton for a motor stator core according to claim 1, characterized in that: The bottom surface of the skeleton upper edge plate (3) and the bottom surface of the end plate upper edge plate (7) are located on the same horizontal plane, and the top surface of the end plate upper edge plate (7) is higher than the top surface of the skeleton upper edge plate (3).

5. The insulating skeleton for the motor stator core according to claim 1, characterized in that: The top surface of the skeleton lower edge plate (4) and the top surface of the end plate lower edge plate (8) are located on the same horizontal plane, and the bottom surface of the end plate lower edge plate (8) is higher than the bottom surface of the skeleton lower edge plate (4).

6. An insulating paper comprising the insulating skeleton for the motor stator core according to any one of claims 1-5, including an insulating paper body (2), the insulating paper body (2) being adhesively disposed between the skeleton body (1) and the stator core body (21), characterized in that: It further includes a stator core main body (21), and the stator core main body (21) is embedded and installed between the limit clamping grooves (6).

7. The insulating paper according to claim 6, wherein: The outer surface of the stator core main body (21) is divided into a stator core upper edge surface (16), a stator core arc surface (17), a stator core bottom surface (18), a stator core lower edge surface (19) and a stator core side surface (20), and the outer surface of the stator core main body (21) is attached to each surface of an insulating paper main body (2).

8. The insulating paper according to claim 7, characterized in that: The insulating paper main body (2) is provided with an insulating paper upper edge surface (10), the insulating paper upper edge surface (10) is attached to the stator core upper edge surface (16), one side of the insulating paper upper edge surface (10) is connected to an insulating paper arc surface (11), the other side of the insulating paper upper edge surface (10) is connected to an insulating paper isolation surface (14), the other end of the insulating paper arc surface (11) is connected to an insulating paper bottom surface (12), the insulating paper arc surface (11) is attached to the stator core arc surface (17), the insulating paper bottom surface (12) is attached to the stator core bottom surface (18), insulating paper sealing surfaces (15) are connected to both sides of the insulating paper bottom surface (12), and two of the insulating paper sealing surfaces (15) are respectively attached to the stator core side surface (20) of the stator core main body (21), the lower end of the insulating paper bottom surface (12) is connected to an insulating paper lower edge surface (13), and the insulating paper lower edge surface (13) is attached to the stator core lower edge surface (19).

9. The insulating paper according to claim 8, characterized in that: The upper edge plate (3) of the skeleton is positioned and fitted to the lower surface of the upper edge surface (10) of the insulating paper. The upper edge plate (3) of the skeleton is provided with a curvature corresponding to the arc surface of the stator core (17) and the arc surface of the insulating paper (11). The arc surface of the insulating paper (11) is positioned and fitted to the lower surface of the arc surface of the upper edge plate (3) of the skeleton. The lower edge plate (4) of the skeleton is positioned and fitted to the upper surface of the lower edge surface (13) of the insulating paper. The outer surface of the end plate support plate (9) is fitted and connected to the sealing surface (15) of the insulating paper.

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