Stator structure and traction machine

Abstract

The utility model discloses a stator structure and a traction machine, and belongs to the technical field of traction machines, the stator structure comprises a plurality of winding assemblies, and the plurality of winding assemblies are spliced and encircled to form an annular stator structure; the winding assembly comprises an iron core piece, a coil framework and an insulating piece, the upper and lower end faces of the first end of the iron core piece are sunken inwards, and wire grooves distributed up and down are formed; the coil framework sleeves the first ends of the iron core pieces, grooves are formed in the bottoms of the two sides, close to the wire grooves, of the iron core pieces, in the stator structure, openings of the two grooves in every two adjacent iron core pieces are oppositely arranged, and the two grooves are communicated to form a containing groove; the coil frameworks are at least partially located at the opening of the containing groove, and the insulating part is arranged between the two coil frameworks. According to the stator structure, the grooves are formed in the bottoms, close to the wire grooves, of the iron core pieces, the two iron core pieces form the containing groove after being spliced, the creepage distance between the conductive coils and the iron core pieces and the creepage distance between the two adjacent conductive coils can be designed to be large, and therefore the insulation strength of the stator structure is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of traction machines, and in particular to a stator structure and a traction machine. Background Technology

[0002] When the traction machine is working, the stator structure is the energized component. The stator structure is formed by multiple winding assemblies and includes conductive coils and slots. There is a significant voltage difference between two conductive coils, requiring phase-to-phase insulation. The iron core is the metal component connected to the outer casing, and insulation between the conductive coils and the iron core is achieved through the coil frame.

[0003] When designing the stator structure, it is necessary to ensure the electrical insulation strength between the conductive coil and the iron core, and between two adjacent conductive coils. This requires ensuring the creepage distance at the corresponding locations. At the slot opening, the creepage distance between the conductive coil and the iron core, and between two conductive coils, is relatively long, making it easier to meet the insulation requirements in the design.

[0004] However, the situation is different at the bottom of the cable tray. For smooth assembly, a gap must be left between adjacent iron cores. Due to the coil arrangement, the distance between two adjacent coils is relatively close at the bottom of the tray. Furthermore, the conductive coils are only separated from the iron cores by the coil frame. Designing the insulation structure at the bottom of the cable tray is challenging and prone to problems such as insufficient creepage distance leading to substandard insulation strength. Utility Model Content

[0005] The purpose of this invention is to improve the problem that existing traction machines are prone to insufficient insulation strength due to insufficient creepage distance, and to provide a stator structure and traction machine.

[0006] The technical solutions for achieving the above objectives include the following:

[0007] The stator structure includes multiple winding assemblies, which are spliced ​​together to form a ring-shaped stator structure; each winding assembly includes an iron core, a coil frame, and an insulating component, and the first end of the iron core has a wire groove.

[0008] The coil frame is sleeved on the first end of the iron core. The bottom of the iron core near the wire groove has grooves on both sides. In the stator structure, the openings of the two grooves on two adjacent iron cores are arranged opposite each other, and the two grooves are connected to form a receiving groove.

[0009] The coil frame is at least partially located at the opening of the receiving groove, and the insulating member is disposed between the two coil frames. The first end of the insulating member is disposed in the receiving groove and abuts against the coil frame.

[0010] In one embodiment, the coil frame includes an isolation part and a limiting part, the limiting part is fixed to the isolation part, the isolation part is sleeved on the outside of the iron core and fits against the bottom wall of the wire groove;

[0011] In two adjacent coil frames, two limiting parts are provided at the opening of the receiving groove, and there is a gap between the two limiting parts, the gap allowing the second end of the insulating member to pass through.

[0012] In one embodiment, the insulating member includes an insulating plate and a limiting rod. The insulating plate is at least partially sleeved outside the limiting rod. The limiting rod is disposed in a receiving groove and abuts against two limiting portions. The insulating plate is disposed in the gap.

[0013] In one embodiment, the insulating plate includes a main body, one end of which is bent to form a connecting part and a sleeve part. The sleeve part is sleeved outside the limiting rod, and the connecting part is bonded to the main body.

[0014] In one embodiment, the limiting rod includes a main rod and two abutting parts. The outer diameter of the abutting parts is larger than the outer diameter of the main rod. The two abutting parts are installed at both ends of the main rod. The sleeve part is sleeved on the outside of the main rod. The abutting parts are used to abut against the ends of the sleeve part.

[0015] In one embodiment, a conductive coil is further included, which is sleeved outside the coil frame and located inside the wire groove;

[0016] The conductive coil is formed by winding wires around a coil frame.

[0017] In one embodiment, the core component includes a splicing body, a support body, and a limiting body, wherein the splicing body is connected to a first end of the support body, and the second end of the support body is connected to the limiting body;

[0018] The width of the support body is smaller than the width of the splicing body and the limiting body, and the groove is formed between the side walls of the support body, the splicing body and the limiting body.

[0019] In one embodiment, the splice gradually increases in size along the radial direction of the stator structure, and two adjacent splices are fixedly connected.

[0020] In one embodiment, in two adjacent winding assemblies, two adjacent coil frames are separated by an insulator, and the second end of the insulator abuts against the two coil frames.

[0021] This utility model also proposes a traction machine, including the stator structure as described above.

[0022] The technical solution provided by this utility model has the following advantages and effects:

[0023] In two adjacent conductive coils, an insulating element is installed at the bottom of each coil, with the first end of the insulating element placed within a receiving groove. The creepage distance between the conductive coil and the iron core is a+b+c; the creepage distance between the bottoms of the two adjacent conductive coils is 2*(a+b+c). Therefore, by creating a groove at the bottom of the iron core near the wire slot, the two iron cores, after being spliced, form a receiving groove to accommodate the first end of the insulating element. Even with a thinner coil frame and a closer spatial distance between the two adjacent conductive coils (i.e., a higher slot fill factor design for the conductive coil within the wire slot), the creepage distance between the conductive coil and the iron core, and between the two adjacent conductive coils, can still be designed to be larger, thereby increasing the insulation strength of the stator structure. Attached Figure Description

[0024] 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.

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the stator structure in one embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of two winding components spliced ​​together in one embodiment of this utility model;

[0028] Figure 3 This is a schematic diagram of two iron core components spliced ​​together in one embodiment of this utility model;

[0029] Figure 4 This is a cross-sectional view of two winding components spliced ​​together in one embodiment of this utility model;

[0030] Figure 5 This is one embodiment of the present invention. Figure 4 Enlarged view of point A;

[0031] Figure 6 This is an insulation schematic diagram of the conductive coil in one embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of an insulating plate in one embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of a limiting rod in one embodiment of the present invention;

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Winding assembly; 1. Core component; 11. Splicing body; 12. Support body; 13. Limiting body; 101. Groove; 102. Receiving groove; 103. Wire groove; 104. Gap; 2. Coil frame; 21. Isolation part; 22. Limiting part; 3. Conductive coil; 40. Insulating component; 4. Insulating plate; 41. Main body; 42. Connecting part; 43. Sleeving part; 5. Limiting rod; 51. Main rod; 52. Abutment part; 200. Stator structure. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] This utility model proposes a stator structure 200, such as Figures 1 to 6 As shown, the stator structure 200 includes multiple winding assemblies 100, which are spliced ​​together to form an annular stator structure 200. Each winding assembly 100 includes an iron core 1, a coil frame 2, and an insulator 40. The upper and lower ends of the first end of the iron core 1 are recessed inward to form vertically distributed grooves 103. The coil frame 2 is fitted onto the first end of the iron core 1. The bottom of the iron core 1 near the grooves 103 has grooves 101. In the stator structure 200, the openings of the two grooves 101 on two adjacent iron cores 1 are arranged opposite each other, and the two grooves 101 are connected to form a receiving groove 102. The coil frame 2 is at least partially located at the opening of the receiving groove 102. The insulator 40 is disposed between two coil frames 2, and the first end of the insulator 40 is disposed in the receiving groove 102 and abuts against the coil frame 2.

[0041] Specifically, the coil frame 2 is fitted over the iron core 1 and placed within the wire groove 103. The coil frame 2 serves to isolate the conductive coil 3 from the iron core 1, ensuring that the iron core 1 and the conductive coil 3 meet the insulation design requirements. When the two conductive coils 3 are wound around the two coil frames 2 respectively, the insulating member 40 is placed between the two coil frames 2. The insulating member 40 separates the two conductive coils 3, and the first end of the insulating member 40 is fixed within the receiving groove 102 by a limiting rod 5. This improves the stability of the insulating member 40 between the two coil frames 2 and prevents the insulation member 40 from moving, which could cause the creepage distance between the two adjacent conductive coils 3 to fail to meet the design specifications.

[0042] Furthermore, such as Figure 5 and Figure 6 As shown, in two adjacent conductive coils 3, the bottom of the two conductive coils 3 is provided with an insulating member 40. The first end of the insulating member 40 is located in the receiving groove 102. The creepage distance between the conductive coil 3 and the iron core 1 is a+b+c; the creepage distance between the bottoms of the two adjacent conductive coils 3 is 2*(a+b+c). Therefore, by opening a groove 101 at the bottom of the iron core 1 near the wire groove 103, the two iron cores 1 form a receiving groove 102 to accommodate the first end of the insulating member 40 after splicing. Under the condition that the coil frame 2 is relatively thin and the spatial distance between the two adjacent conductive coils 3 is relatively close, that is, the slot fill factor of the conductive coil 3 in the wire groove 103 is set to be relatively high, the creepage distance between the conductive coil 3 and the iron core 1, and between the two adjacent conductive coils 3 can still be designed to be relatively large, thereby increasing the insulation strength of the stator structure 200.

[0043] In addition, it should be noted that the larger the groove 101 of the core component 1 is designed, the larger the receiving groove 102 can be designed, the greater the creepage distance between the conductive coil 3 and the core component 1, and the higher the insulation strength. However, the structural strength of the core component 1 after slotting needs to be considered.

[0044] Furthermore, adding grooves 101 to the bottom of both sides of the core component 1 does not increase the spatial distance between the two conductive coils 3 in the design, nor does it reduce the slot fill factor of the conductive coils 3 in the slots 103, thus ensuring the utilization rate of electrical materials.

[0045] Preferably, the coil frame 2 includes an isolation part 21 and a limiting part 22. The limiting part 22 is fixed to the isolation part 21. The isolation part 21 is sleeved on the outside of the iron core 1 and fits against the bottom wall of the wire groove 103. In two adjacent coil frames 2, two limiting parts 22 are provided at the opening of the receiving groove 102, and there is a gap 104 between the two limiting parts 22. The gap 104 allows the second end of the insulating member 40 to pass through.

[0046] Specifically, the limiting part 22 is used to restrict the movement of the first end of the insulating member 40 within the receiving groove 102. The two limiting parts 22 abut against the first end of the insulating member 40 from both sides, thereby improving the stability of the first end of the insulating member 40 within the receiving groove 102. The gap 104 between the two limiting parts 22 allows the second end of the insulating member 40 to pass through. The two limiting parts 22 abut against the main body of the insulating member 40, further improving the stability of the insulating member 40 between two adjacent conductive coils 3.

[0047] Furthermore, grooves 101 are added to both sides of the core component 1. This can be achieved by simply changing the stamping die, making the processing relatively easy. Limiting parts 22 are added to both sides of the coil frame 2, such as... Figure 5 As shown, the limiting part 22 is located at the end of the isolation part 21. While the shape of the limiting part 22 is not separately designed, it functions to restrict the insulating component 40 after being integrally machined with the isolation part 21. This eliminates the need to specifically modify the structure of the coil frame 2, making the injection molding process straightforward. This stator structure 200, while meeting functional requirements, is structurally simple and reduces processing costs. Furthermore, the coil frame 2 is designed to be thin, resulting in lower costs and manufacturing difficulty. Therefore, the winding assembly 100 has low processing and production difficulty, thus reducing manufacturing costs.

[0048] Preferably, the insulating component 40 includes an insulating plate 4 and a limiting rod 5. The insulating plate 4 is at least partially sleeved outside the limiting rod 5. The limiting rod 5 is disposed within the receiving groove 102 and abuts against the two limiting parts 22. The insulating plate 4 is disposed within the gap 104. Specifically, the limiting rod 5 is used to be placed within the receiving groove 102, and the first end of the insulating plate 4 is used to be sleeved outside the limiting rod 5. The insulating plate 4 is fixed between two adjacent conductive coils 3 by the limiting rod 5, further stabilizing the creepage distance of the adjacent conductive coils 3.

[0049] In some embodiments, such as Figure 7 As shown, the insulating plate 4 includes a main body 41. One end of the main body 41 is bent to form a connecting part 42 and a sleeve part 43. The sleeve part 43 is sleeved on the outside of the limiting rod 5, and the connecting part 42 is bonded to the main body 41. Specifically, during installation, the insulating plate 4 achieves the fixation of the connecting part 42 and the main body 41 through mechanical cooperation and adhesive, eliminating the need for the impregnation process of the winding assembly 100. Furthermore, the use of self-adhesive enameled wire in the stator structure 200 processing eliminates the need for the impregnation process of the stator structure 200. This saves on process costs and improves production efficiency, while also improving the production environment and reducing waste emissions. In addition, the insulating plate 4 uses the most widely used and common material in the motor industry, which is beneficial for material procurement and mass production.

[0050] Preferred, such as Figure 8As shown, the limiting rod 5 includes a main rod 51 and two abutment portions 52. The outer diameter of the abutment portions 52 is larger than the outer diameter of the main rod 51. The two abutment portions 52 are installed at both ends of the main rod 51. The sleeve portion 43 is sleeved on the outside of the main rod 51, and the abutment portions 52 are used to abut against the ends of the sleeve portion 43. Specifically, in the axial direction of the stator structure 200, the two abutment portions 52 are used to abut against the two ends of the core member 1, restricting the movement of the main rod 51 in the receiving groove 102, and further improving the stability of the limiting rod 5 in the receiving groove 102.

[0051] Preferably, the stator mechanism 200 further includes a conductive coil 3, which is sleeved outside the coil frame 2 and located within the wire groove 103; the conductive coil 3 is formed by winding a wire around the coil frame 2. Specifically, the wire is wound around the coil frame 2 to form the conductive coil 3, which is located in the wire grooves 103 distributed vertically on the iron core 1.

[0052] Preferably, the core component 1 includes a splicing body 11, a support body 12, and a limiting body 13. The splicing body 11 is connected to the first end of the support body 12, and the second end of the support body 12 is connected to the limiting body 13. The width of the support body 12 is smaller than the width of the splicing body 11 and the limiting body 13, and a groove 103 is formed between the side walls of the support body 12, the splicing body 11, and the limiting body 13. Specifically, the splicing body 11, the support body 12, and the limiting body 13 are an integral structure. The width of the support body 12 is smaller than the width of the splicing body 11 and the limiting body 13, so that a groove 103 is formed on the core component 1. When the conductive coil 3 is placed in the groove 103, the splicing body 11 and the limiting body 13 limit the conductive coil 3, thereby improving the stability of the conductive coil 3 in the groove 103.

[0053] Preferably, the splice body 11 gradually increases in size along the radial direction of the stator structure 200, and two adjacent splice bodies 11 are fixedly connected. Specifically, the splice body 11 gradually increases in size along the radial direction of the stator structure 200, making the splice body 11 fan-shaped, thereby improving the fit between two adjacent splice bodies 11.

[0054] In some embodiments, in two adjacent winding assemblies 100, two adjacent coil frames 2 are separated by an insulating member 40, and the second end of the insulating member 40 abuts against the two coil frames 2. Specifically, the first end of the insulating member 40 is fixed in the receiving groove 102 by a limiting rod 5, and the second end of the insulating member 40 is abutted by the two coil frames 2, thereby fixing the second end of the insulating member 40 and further improving the stability of the insulating member 40 in the stator structure 200.

[0055] This utility model also proposes a traction machine, including the stator structure 200 described above. By applying the stator structure 200 to the traction machine, the creepage distance between two adjacent conductive coils 3 is increased by the insulating component 40, thereby increasing the insulation strength of the stator structure 200. This further demonstrates that the stator structure 200 is suitable for elevator permanent magnet synchronous traction machines with high insulation requirements, especially high-voltage elevator permanent magnet synchronous traction machines.

[0056] 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.

[0057] 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.

[0058] 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 structure, characterized by, include: Multiple winding assemblies are spliced ​​together to form a ring-shaped stator structure; the winding assembly includes an iron core, a coil frame, and an insulating component, and the first end of the iron core has a wire groove; The coil frame is sleeved on the first end of the iron core. The bottom of the iron core near the wire groove has grooves on both sides. In the stator structure, the openings of the two grooves on two adjacent iron cores are arranged opposite each other, and the two grooves are connected to form a receiving groove. The coil frame is at least partially located at the opening of the receiving groove, and the insulating member is disposed between the two coil frames. The first end of the insulating member is disposed in the receiving groove and abuts against the coil frame.

2. The stator structure of claim 1, wherein The coil frame includes an isolation part and a limiting part. The limiting part is fixed to the isolation part. The isolation part is sleeved outside the iron core and fits against the bottom wall of the wire groove. In two adjacent coil frames, two limiting parts are provided at the opening of the receiving groove, and there is a gap between the two limiting parts, the gap allowing the second end of the insulating member to pass through.

3. The stator structure of claim 2, wherein The insulating component includes an insulating plate and a limiting rod. The insulating plate is at least partially sleeved outside the limiting rod. The limiting rod is disposed in the receiving groove and abuts against two limiting parts. The insulating plate is disposed in the gap.

4. The stator structure of claim 3, wherein The insulating plate includes a main body, one end of which is bent to form a connecting part and a sleeve part. The sleeve part is sleeved outside the limiting rod, and the connecting part is bonded to the main body.

5. The stator structure of claim 4, wherein The limiting rod includes a main rod and two abutting parts. The outer diameter of the abutting parts is larger than the outer diameter of the main rod. The two abutting parts are installed at both ends of the main rod. The sleeve part is sleeved on the outside of the main rod. The abutting parts are used to abut against the ends of the sleeve part.

6. The stator structure of any one of claims 1 to 5, wherein, It also includes a conductive coil, which is sleeved outside the coil frame and located inside the wire groove; The conductive coil is formed by winding wires around a coil frame.

7. The stator structure of any one of claims 1 to 5, wherein The core component includes a splicing body, a support body, and a limiting body. The splicing body is connected to the first end of the support body, and the second end of the support body is connected to the limiting body. The width of the support body is smaller than the width of the splicing body and the limiting body, and the groove is formed between the side walls of the support body, the splicing body and the limiting body.

8. The stator structure of claim 7, wherein The splice gradually increases in size along the radial direction of the stator structure, and two adjacent splices are fixedly connected.

9. The stator structure of any one of claims 1 to 5, wherein, In two adjacent winding assemblies, the two adjacent coil frames are separated by an insulator, and the second end of the insulator abuts against the two coil frames.

10. A traction machine characterized by Includes the stator structure described in any one of claims 1 to 9.

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