Motor stator core winding notch structure
By setting a chamfered structure at the winding slot of the motor stator core and implementing insulation treatment, the problems of high mold cost, low slot fill rate and easy damage to the insulation layer in the existing technology are solved, thereby achieving cost reduction and motor performance improvement.
Patent Information
- Application Number
- CN202422899480.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing technologies for processing the winding slots of motor stator cores suffer from problems such as high mold costs, long manufacturing cycles, low slot fill rate, easy damage to the insulation layer, and occupation of winding space. It is difficult to improve the winding slot fill rate and motor performance while ensuring insulation performance.
Chamfered structures are set at both ends or one side of the stator core winding slot to form bevels or rounded corners. An insulating protective layer is formed by laser melting or removing metal material to avoid contact with sharp corners. Insulation treatment is carried out by methods such as electrophoretic coating or insulating material spraying.
It increases the winding slot fill factor, reduces costs, enhances the adhesion of the insulation layer, avoids insulation layer damage, and improves motor performance and reliability.
Smart Images
Figure CN223527854U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a motor stator core, especially a motor stator core winding slot structure. BACKGROUND
[0002] The prior art has the following processing methods for the stator core winding slot:
[0003] 1. Injection molding frame: the core is placed in an injection molding mold, and an injection molding layer with a certain thickness is formed on the surface in contact with the winding coil, so that the core is separated from the enameled wire, and the thickness of the injection molding layer is usually at least 0.2 mm. This method has high mold cost, long manufacturing cycle and high cost.
[0004] 2. Insulating paper: a certain thickness of insulating paper is inserted into the winding slot to separate the winding coil from the stator core. This method can cause the coil end to be high, and is not suitable for split type combined cores.
[0005] 3. Direct insulation coating: the insulating material is sprayed or dipped on the surface of the core in contact with the winding coil. Even so, due to the punching process of the stator core, the winding slot positions on the upper and lower surfaces of the stator core are close to sharp corners, which makes it difficult for the insulation layer to adhere stably. During winding, the insulation layer is damaged locally due to the winding tension, and even the insulation protective layer of the wire itself is cut.
[0006] To avoid this situation, the existing processing method is to increase the insulation skeleton at the winding slot position of the two ends of the stator. This not only increases the cost, but also occupies the winding space, reduces the slot fill rate, and reduces the motor performance.
[0007] Therefore, for a motor stator with high power density requirements, how to ensure insulation performance, not occupy additional winding space, improve the slot fill rate of winding, reduce power consumption, and improve motor performance are technical problems to be solved. UTILITY MODEL CONTENTS
[0008] The utility model aims at overcoming the defects of the prior art and provides a motor stator core winding slot structure.
[0009] The utility model can achieve the purpose by the following technical scheme:
[0010] According to one aspect of the utility model, a motor stator core winding slot structure is provided, which comprises a stator core winding slot. The stator core winding slot is provided with a chamfer structure at the end position of the core height direction or the end position of one side, forming a bevel or a round corner or a natural fusion collapse surface with a certain size, and the local or the whole of the stator core winding slot has an insulation protective layer.
[0011] Preferably, the bevel angle is greater than 15° and less than 80°.
[0012] Preferably, the fillet radius R is greater than or equal to 0.05 mm.
[0013] Preferably, the fillet intersects or is tangent to the stator core winding slot.
[0014] Preferably, the arc length of the bevel or the fillet is not less than 0.05 mm.
[0015] Preferably, the bevel or the fillet is formed by laser melting or removing metal material.
[0016] Preferably, the insulation protective layer is formed by electrophoretic coating, insulation material spraying, insulation material dipping, or insulation coating.
[0017] Compared with the prior art, the utility model has the following advantages:
[0018] 1) The motor stator core winding slot chamfer insulation structure and processing technology can directly wind on the stator core without increasing additional components such as insulation skeletons, thereby reducing costs while improving winding slot fullness and motor performance.
[0019] 2) The utility model processes the chamfering technology on the two end positions or one end position of the stator core winding slot in the core height direction, forms a bevel or a fillet of a certain size, and improves the reliability of the surface insulation treatment of the stator core winding slot in the later period.
[0020] 3) The utility model implements local or overall insulation treatment on the stator winding slot position, can save additional components such as insulation skeletons and insulation paper, improves the effective winding space while ensuring good insulation performance, improves the winding slot fullness, reduces the cost, and improves the performance of the motor. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 Fig. 1 is a structure schematic diagram of the split type stator core winding slot chamfer of the utility model embodiment;
[0022] Figure 2 Fig. 2 is a structure schematic diagram of the whole type stator core winding slot chamfer of the utility model embodiment;
[0023] Fig. 3(a) is a structure comparison schematic diagram of the split type stator core winding slot chamfer before the utility model embodiment;
[0024] Fig. 3(b) is an enlarged structure schematic diagram of part B of Fig. 3(a);
[0025] Fig. 4(a) is a structure comparison schematic diagram of the split stator core wire slot after chamfering according to an embodiment of the present application;
[0026] Fig. 4(b) is an enlarged structure schematic diagram of part A of Fig. 4(a);
[0027] Wherein 1 is an upper end part stamping, 2 is a lower end part stamping, 11 is a stator yoke part, 12 is a stator tooth part, 3 is a stator core wire slot, 4 is a chamfer structure, and 5 is a wire slot before chamfering. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.
[0029] EMBODIMENT
[0030] As shown in Figs. 1 and 2, a motor stator core wire slot structure includes a stator core wire slot 3, and a chamfer structure 4 is arranged at the end position of the stator core wire slot 3 in the height direction of the core or at the end position of one side thereof, to form a bevel or a round corner or a natural fusion collapse surface with a certain size, and the stator core wire slot has an insulation protective layer. Figure 1 Figure 2 The stator core is a split core or a whole core combination formed by stamping, layering and various holding methods such as riveting, bonding and welding.
[0031] The stator core wire slot refers to a wire winding area formed between the stator yoke part and the stator tooth part of the motor stator core body, for winding coils on the stator core.
[0032] The bevel or round corner has an arc size of not less than 0.05㎜, which increases the natural bending radius of the wire winding and provides process protection for the stable and reliable adhesion of subsequent surface insulation treatment.
[0033] The bevel or round corner has an arc size of not less than 0.05㎜, which increases the natural bending radius of the wire winding and provides process protection for the stable and reliable adhesion of subsequent surface insulation treatment.
[0034] The bevel angle is greater than 15° and less than 80°, the round corner radius R is greater than or equal to 0.05mm, the round corner can intersect or be tangent with the stator core winding slot, the bevel or round corner is formed by laser melting or removing metal material, so it is approximate bevel or round corner. The utility model discloses removed the root contact sharp angle of the stator core winding slot during winding. The laser chamfering can avoid the traditional metal cutting method to exert additional force on the core, causing the excessive deformation of the core surface or the problem of the stator core being scattered due to external force.
[0035] On this basis, the local or whole of the stator core winding slot is further implemented insulation treatment. Due to the chamfering, the contact sharp angle can avoid damaging the insulation layer, improve the adhesion of the insulation layer, and also avoid the risk of insulation failure at the sharp corner of the winding slot and piercing the insulation layer of the wire material during winding due to the winding tension. The insulation treatment refers to the process of forming an insulation protective layer on the local or whole of the stator core winding slot by electrophoretic coating or insulation material spraying or insulation material dipping or insulation coating method.
[0036] Embodiment 2
[0037] As shown in the accompanying drawings, Figure 1 , Figure 2 the laser melting or removing material method is used for chamfering the stator core winding slot. Figure 3(a) and 3(b) are shape schematics before chamfering the winding slot, Figure 4(a) and 4(b) are local enlarged view schematics after chamfering the winding slot.
[0038] The laser melting or removing material method is used for chamfering the stator core winding slot.
[0039] Due to the characteristics of energy concentration, wide range of processing materials, small processing stress and small deformation of laser, the desired ideal shape can be obtained more conveniently.
[0040] On one side or both sides of the stator core height direction, the profile position of the winding slot contacting the wire material during winding is melted or removed by laser, the sharp angle of the stator core winding slot on both sides or one side of the stator core height direction is removed to form a certain size of bevel or round corner or natural melting collapse surface. This process method removes the root contact sharp angle of the stator core winding slot during winding.
[0041] On this basis, the local or whole of the stator core winding slot is further implemented insulation treatment. The insulation treatment refers to the process of forming an insulation protective layer on the local or whole of the stator core winding slot by electrophoretic coating or insulation material spraying or insulation material dipping or insulation coating method.
[0042] Due to the chamfer, the damage of the contact sharp corner to the insulating layer can be avoided, the adhesion of the insulating layer is improved, and the risk of the insulating failure of the sharp corner of the winding notch and the piercing of the wire insulating layer of the winding wire due to the winding tension during winding can be avoided.
[0043] The above merely describes the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A structure of a slot opening of a winding of a stator core of an electric machine, characterized by, The structure comprises a stator core winding slot, which is provided with a chamfer structure at the end position of the core height direction or the end position of one side, forming a bevel or a round corner or a natural melting collapse surface with a certain size, and the local or the whole of the stator core winding slot has an insulation protective layer.
2. The slot opening structure of a stator core of an electric motor according to claim 1, wherein The angle of the bevel is greater than 15° and less than 80°.
3. The slot structure of a stator core of an electric motor according to claim 1, wherein The radius R of the round corner is greater than or equal to 0.05mm.
4. The slot structure of a stator core of an electric motor according to claim 1, wherein The round corner intersects or is tangent to the stator core winding slot.
5. The slot structure of a stator core of an electric motor according to claim 1, wherein The arc length of the bevel or the round corner is not less than 0.05mm.
6. The slot structure of a stator core of an electric motor according to claim 1, wherein The bevel or the round corner is formed by laser melting or removing metal materials.
7. The slot structure of a stator core of an electric motor according to claim 1, wherein The insulation protective layer is formed by electrophoretic coating, spraying of insulating materials, dipping of insulating materials or insulating coating.