Automobile generator stator core with special-shaped grooves and special-shaped teeth

Abstract

The utility model discloses an automobile generator stator iron core with special-shaped grooves and special-shaped teeth, which comprises a stator iron core body formed by laminating a plurality of stator punching sheets with the same structure, the inner side of the stator iron core body is provided with a plurality of special-shaped teeth which are uniformly distributed in an annular array, and a winding groove is formed between every two adjacent special-shaped teeth. The outer side wall of the stator core body is provided with a plurality of heat dissipation grooves which are uniformly distributed in an annular array and a plurality of cramp grooves which are uniformly distributed in an annular array. The special-shaped teeth are arranged on the inner side of the stator iron core body to increase the number of the internal winding grooves, increase the number of windings, increase the density of the windings, increase the generated magnetic field and improve the power generation capacity, and meanwhile, the heat dissipation grooves and the cramp grooves are formed in the outer side of the stator iron core body, so that the structural strength is improved, and the service life of the stator iron core is prolonged. The heat dissipation effect is improved, harmonic vibration and noise of a magnetic field are reduced, the winding grooves, the cramp grooves and the heat dissipation grooves are reasonably distributed, and the overall strength of the structure is guaranteed while the functions are provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the stator core for generator especially relates to the automobile generator stator core of having special-shaped slot and special-shaped tooth. BACKGROUND

[0002] With the rapid development of new energy vehicles, permanent magnet synchronous motor has been applied on a large scale, and its main component stator core (core) is the basic element of automobile generator stator core assembly, which together with stator coil, insulation paper and the like constitutes a stator assembly. In the prior art, the automobile generator stator core generally has 36 or 48 wire slots, and the more the number of wire slots of the stator core, the higher the power generation efficiency of the generator, and the less the material used in the production of the stator core, thereby reducing the production cost.

[0003] The patent with the application number CN201220131055.2 discloses a stator lamination, a stator core and a motor. The stator lamination has a yoke part in the shape of a ring and a plurality of teeth extending from the yoke part toward the center of the ring. A slot is formed between two adjacent teeth. The stator lamination has a hollow inner circular hole. The outer circular diameter of the stator lamination is between 115 mm and 120 mm. The diameter of the inner circular hole is between 72 mm and 76 mm. The slot opening width is between 1.9 mm and 2.3 mm. The slot shoulder width is between 4.5 mm and 4.7 mm. The slot opening height is between 1.1 mm and 1.3 mm. The slot shoulder height is between 0.75 mm and 0.95 mm.

[0004] The above patent improves the size of the stator core to reduce the amount of silicon steel sheet used, improve the utilization rate of the silicon steel sheet, make the magnetic field density of the yoke part and the tooth part more uniform, and reduce the vibration and noise during motor operation. However, the effect of this improvement is limited. In use, the number of winding slots is too small to increase the density of the coil and thus increase the power generation. No heat dissipation structure is provided, resulting in poor heat dissipation. In addition, the eddy current loss and noise problem of the existing stator core has not been improved. UTILITY MODEL CONTENTS

[0005] Based on the size improvement in the prior art, the number of winding slots is too small to increase the density of the coil and thus increase the power generation. No heat dissipation structure is provided, resulting in poor heat dissipation. In addition, the eddy current loss and noise problem has not been improved. The utility model provides an automobile generator stator core with special-shaped slots and special-shaped teeth.

[0006] The utility model discloses a technical scheme that solves the above technical problems, which is an automobile generator stator core with a special-shaped groove and a special-shaped tooth, comprising a stator core body formed by laminating a plurality of stator lamination sheets of the same structure, a plurality of special-shaped teeth arranged in a ring array and uniformly distributed on the inner side of the stator core body, winding grooves formed between adjacent special-shaped teeth, a plurality of heat dissipation grooves arranged in a ring array and uniformly distributed on the outer side wall of the stator core body, and a plurality of buckle groove arranged in a ring array and uniformly distributed on the outer side wall of the stator core body.

[0007] Preferably, the buckle groove comprises a first groove body and a second groove body that are left-right symmetrical and each have a circular-arc groove bottom, and a protruding portion is arranged between the first groove body and the second groove body.

[0008] Preferably, the maximum outer diameter of the protruding portion is smaller than the outer diameter of the outer side wall of the stator core body.

[0009] Preferably, the junctions between the first groove body, the protruding portion and the second groove body and the junctions between the first groove body and the second groove body and the outer side wall of the stator core body are all curved surfaces with smooth transitions.

[0010] Preferably, the protruding portion is a solid circular-arch structure that protrudes outward.

[0011] Preferably, the heat dissipation groove is a groove with a circular-arc cross section, and the junctions between the two ends of the heat dissipation groove and the side wall of the stator core body are curved surfaces with smooth transitions.

[0012] Preferably, the special-shaped tooth and the winding groove are both 72 in number, the buckle groove has 6, five heat dissipation grooves are arranged between every two adjacent buckle grooves, the central angles corresponding to the adjacent buckle groove and the heat dissipation groove are 10 degrees, the six buckle grooves are located on the outer side of the six special-shaped teeth in the radial direction of the position of the buckle groove, the outer diameter of the stator core body is 122 mm, the diameter of the root of the special-shaped tooth on the outer side is 114.6 mm, the height is 34 mm, the width of the winding groove is 2.8 mm, and the inner diameter of the special-shaped tooth is 95.1 mm.

[0013] Preferably, the special-shaped tooth is a T-shaped tooth, which comprises a first tooth portion arranged in the radial direction and a second tooth portion connected to the end of the first tooth portion and perpendicular to the first tooth portion, the width of the first tooth portion decreases uniformly from the outside to the inside, the width of the winding groove is consistent from the outside to the inside, and the gap width between the second tooth portions of adjacent special-shaped teeth is 1.8 mm.

[0014] Preferably, the junctions between the first tooth portion and the inner side wall of the stator core body and the junctions between the first tooth portion and the second tooth portion are all provided with rounded structures.

[0015] Preferably, the corners of the second tooth portion are provided with rounded structures, the inner side wall of the second tooth portion is a circular-arc surface, and the central axis of the circular-arc surface is collinear with the central axis of the stator core body.

[0016] Compared with the prior art, the application has the advantages that: the application sets the special-shaped teeth in the inner side of the stator core body to increase the number of internal winding grooves, improve the number of windings, increase the winding density, increase the generated magnetic field, and improve the power generation capacity; meanwhile, the heat dissipation grooves and the buckle piece grooves are set on the outer side of the stator core body, which improves the structural strength, improves the heat dissipation effect, and reduces the magnetic field harmonic vibration and noise; the winding grooves, the buckle piece grooves, and the heat dissipation grooves are reasonably arranged, which ensures the overall structural strength while providing the above functions. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be described in further detail below in combination with the drawings and preferred embodiments, but the person skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can contain exaggerated display, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 It is a perspective view of the utility model;

[0019] Figure 2 It is a top view of the utility model;

[0020] Figure 3 It is Figure 2 It is an enlarged view of A in the middle;

[0021] In the drawing: 10, stator core body; 101, special-shaped teeth; 1011, first tooth part; 1012, second tooth part; 1013, circular arc surface; 102, winding groove; 103, heat dissipation groove; 104, buckle piece groove; 1041, first groove body; 1042, second groove body; 1043, protruding part. DETAILED DESCRIPTION

[0022] The preferred embodiments of the utility model will be described in detail below with reference to the drawings. The person skilled in the art will appreciate that these descriptions are only descriptive, exemplary, and should not be interpreted as limiting the protection scope of the utility model.

[0023] The automobile generator stator core with special-shaped grooves and special-shaped teeth, like Figures 1-3As shown in the figure, 0 is the center of the circle, which includes a stator core body 10 formed by stacking a plurality of stator laminations of the same structure, and a plurality of shaped teeth 101 arranged in a ring array are arranged on the inner side of the stator core body 10, and a winding slot 102 is formed between adjacent shaped teeth 101, and a plurality of heat dissipation grooves 103 and a plurality of buckle grooves 104 arranged in a ring array are arranged on the outer side wall of the stator core body 10. The buckle groove 104 provided on the outer wall of the stator core body 10 is used for welding the buckle to fix the stator laminations, at the same time, a certain heat dissipation is provided to reduce the magnetic field harmonic vibration and noise, in addition, the heat dissipation effect is further enhanced by arranging the heat dissipation groove 103 to reduce the magnetic field harmonic vibration and noise.

[0024] As a preferred, the buckle groove 104 includes a first groove body 1041 and a second groove body 1042 which are symmetrical to each other and each have a circular arc groove bottom, and a protruding portion 1043 is arranged between the first groove body 1041 and the second groove body 1042. The double-groove structure increases the fitting area, and after welding the buckle, it has better limiting effect on the stator laminations in the circumferential direction, so that the stability of the entire stator core is stronger.

[0025] As a preferred, the maximum outer diameter of the protruding portion 1043 is smaller than the outer diameter of the outer side wall of the stator core body 10. This scheme can ensure that the protruding portion 1043 does not protrude outside the outer side wall of the stator core, so that the buckle can be embedded and welded.

[0026] As a preferred, the intersection between the first groove body 1041, the protruding portion 1043 and the second groove body 1042 and the intersection between the first groove body 1041 and the second groove body 1042 and the outer side wall of the stator core body 10 are all curved surfaces with smooth transitions. As a preferred, the protruding portion 1043 is a solid circular arch structure. The curved surface structure and the circular arch structure can increase the fitting area between the buckle and the stator core body 10, and avoid gaps.

[0027] As a preferred, the heat dissipation groove 103 is a groove with a circular arc cross section, and the connection between the two ends of the heat dissipation groove 103 and the side wall of the stator core body 10 is a curved surface with smooth transition. Compared with a square groove, the arc-shaped groove is beneficial to the air circulation at this place, and the heat in the groove can be dissipated faster.

[0028] Preferably, the 72 profiled teeth 101 and winding grooves 102, the 6 buckle grooves 104, and the 5 heat dissipation grooves 103 between two adjacent buckle grooves 104, and the 10-degree central angle corresponding to the adjacent buckle groove 104 and heat dissipation groove 103, and the six buckle grooves 104 located on the outer side of the six profiled teeth 101, and the outer diameter of the stator core body 10 is 122 mm, the diameter of the profiled tooth 101 at the root of the outer side is 114.6 mm, the height is 34 mm, the width of the winding groove 102 is 2.8 mm, the gap width between the second tooth part 1012 between the adjacent profiled teeth 101 is 1.8 mm, and the inner diameter of the profiled tooth 101 is 95.1 mm. In this scheme, the winding grooves 102 are increased to 72, and the increase of the winding grooves 102 will correspondingly increase the winding, thereby improving the magnetic field strength and ultimately improving the power generation efficiency; the number of buckle grooves 104 and heat dissipation grooves 103 is 36, and they are evenly arranged along the circumference, and after being arranged, they are located on the outer side of the profiled tooth 101 without being opposite to the inner and outer winding grooves 102, which not only ensures the strength of the structure, but also greatly improves the heat dissipation effect, and the grooves are also conducive to reducing magnetic field harmonic vibration and noise. In addition, the dimensions of each part are designed according to the number of profiled teeth 101 to improve the power generation efficiency.

[0029] Preferably, the profiled tooth 101 is a T-shaped tooth, which includes a radially arranged first tooth part 1011 and a second tooth part 1012 connected to the end of the first tooth part 1011 and perpendicular to the first tooth part 1011, and the width of the first tooth part 1011 uniformly decreases from the outside to the inside, and the width of the winding groove 102 is consistent from the outside to the inside. In this scheme, the tooth is arranged in a profiled structure, so that the width of the winding groove 102 remains consistent in the radial direction, ensuring the uniformity of the winding.

[0030] Preferably, the connection between the first tooth part 1011 and the inner side wall of the stator core body 10 and the connection between the first tooth part 1011 and the second tooth part 1012 are provided with a rounded structure. Preferably, the corner of the second tooth part 1012 is provided with a rounded structure, and the inner side wall of the second tooth part 1012 is a circular arc surface 1013, and the central axis of the circular arc surface 1013 is collinear with the central axis of the stator core body 10. The rounded structure has a larger contact surface with the winding after winding, which is more conducive to ensuring the stability of the winding.

[0031] The automobile generator stator core with the special-shaped groove and the special-shaped tooth is introduced above, the principle and the implementation mode of the present application are described by applying specific examples, and the above embodiment is only used for helping to understand the present application and the core idea. It should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A stator core for an automotive generator with irregularly shaped slots and teeth, comprising a stator core body formed by stacking several stator laminations of identical structure, wherein the inner side of the stator core body is provided with several irregularly shaped teeth evenly distributed in a ring array, and winding slots are formed between adjacent irregularly shaped teeth, characterized in that, The outer side wall of the stator core body is provided with a plurality of evenly distributed heat dissipation grooves in annular array and a plurality of evenly distributed buckle groove in annular array.

2. The stator core of an automobile alternator having a profiled slot and a profiled tooth according to claim 1, characterized by, The buckle groove includes a first groove body and a second groove body which are symmetrical and each has a circular-arc groove bottom, and a protruding portion is arranged between the first groove body and the second groove body.

3. The stator core of an automobile alternator having a profiled slot and a profiled tooth according to claim 2, characterized by, The maximum outer diameter of the protruding portion is smaller than the outer diameter of the outer side wall of the stator core body.

4. The stator core of an alternator having a profiled slot and a profiled tooth according to claim 2, characterized by, The junctions among the first groove body, the protruding portion and the second groove body and the junctions of the first groove body and the second groove body with the outer side wall of the stator core body are all curved surfaces with smooth transitions.

5. The stator core of an automobile alternator having a profiled slot and a profiled tooth according to claim 4, characterized by The protruding portion is a convex solid circular-arch structure.

6. The stator core of an alternator having a profiled slot and a profiled tooth according to claim 1, wherein, The heat dissipation groove is a groove with a circular-arc cross section, and the junctions of the two ends of the heat dissipation groove with the side wall of the stator core body are curved surfaces with smooth transitions.

7. The stator core of an alternator having a profiled slot and a profiled tooth according to claim 1, wherein, The special-shaped teeth and the winding grooves are all 72 in number, the buckle grooves are 6 in number, five heat dissipation grooves are arranged between every two adjacent buckle grooves, the corresponding central angles of the adjacent buckle grooves and the heat dissipation grooves are 10 degrees, the six buckle grooves are respectively located at the outer sides of the six special-shaped teeth with the radial direction of the position of the buckle groove as the reference, the outer diameter of the stator core body is 122 mm, the diameter of the root of the special-shaped tooth is 114.6 mm, the height is 34 mm, the width of the winding groove is 2.8 mm, and the inner diameter of the special-shaped tooth is 95.1 mm.

8. The stator core of an automobile alternator having a profiled slot and a profiled tooth according to claim 7, characterized by The special-shaped tooth is a T-shaped tooth, which includes a first tooth portion arranged in the radial direction and a second tooth portion connected with the end portion of the first tooth portion and perpendicular to the first tooth portion, the width of the first tooth portion decreases uniformly from the outside to the inside, the width of the winding groove is consistent from the outside to the inside, and the gap width between the second tooth portions of adjacent special-shaped teeth is 1.8 mm.

9. The stator core of an automobile alternator having a profiled slot and a profiled tooth according to claim 8, characterized by The junction of the first tooth portion with the inner side wall of the stator core body and the junction of the first tooth portion and the second tooth portion are both provided with a rounded structure.

10. The stator core of an automobile alternator having a profiled slot and a profiled tooth according to claim 9, characterized by The corner of the second tooth portion is provided with a rounded structure, and the inner side wall of the second tooth portion is a circular-arc surface, and the central axis of the circular-arc surface is collinear with the central axis of the stator core body.

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