CN219477689U - Stator, motor and stator core - Google Patents
Stator, motor and stator core Download PDFInfo
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- CN219477689U CN219477689U CN202320369777.XU CN202320369777U CN219477689U CN 219477689 U CN219477689 U CN 219477689U CN 202320369777 U CN202320369777 U CN 202320369777U CN 219477689 U CN219477689 U CN 219477689U
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- stator
- tooth
- root
- stator core
- coil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Iron Core Of Rotating Electric Machines (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The utility model relates to a stator, a motor and a stator core. Techniques for improving the flow of magnetic flux are provided. A stator is provided with: a stator core formed by stacking a plurality of steel plates; and a coil wound around the stator core, the stator being a salient pole concentrated winding stator including a plurality of stator cores arranged in a circumferential direction, the stator core including a tooth portion having: a first surface intersecting the circumferential direction; and a second surface intersecting the circumferential direction and provided on a side opposite to the first surface, the coil being wound around the tooth portion of the stator core, a curvature of a shape near a root portion in the first surface of the tooth portion being different from a curvature of a shape near a root portion in the second surface of the tooth portion.
Description
Technical Field
The utility model relates to a stator, a motor and a stator core.
Background
Patent document 1 discloses a structure in which a coil is wound around a split core via an insulating material. The coil is wound obliquely from the center side toward the outer diameter side of the core.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2003-333782
Disclosure of Invention
Problems to be solved by the utility model
However, since the coils are wound in the oblique direction, the coils disposed around the teeth (teeth) of the split cores are different from each other, and there is room for improvement in terms of improving the flow of the magnetic flux.
The present utility model has been made in view of the above-described problems, and an object thereof is to provide a technique for improving the flow of magnetic flux.
Solution for solving the problem
A stator according to an aspect of the present utility model for achieving the above object is characterized by comprising: a stator core formed by stacking a plurality of steel plates; and a coil wound around the stator core, the stator being a salient pole concentrated winding stator including a plurality of stator cores arranged in a circumferential direction, the stator core including a tooth portion having: a first surface intersecting the circumferential direction; and a second surface intersecting the circumferential direction and provided on a side opposite to the first surface, the coil being wound around the tooth portion of the stator core, a curvature of a shape near a root portion in the first surface of the tooth portion being different from a curvature of a shape near a root portion in the second surface of the tooth portion.
The stator according to the above, wherein the stator core has a hole portion for bolt fastening, the hole portion being provided at: a distance between a corner of the tooth portion near the root portion in the first surface and the hole portion is equal to a distance between a corner of the tooth portion near the root portion in the second surface and the hole portion.
The stator according to the above, wherein the hole portion is provided at: a distance between a corner of the tooth near the root in the first surface and a center position of the hole is equal to a distance between a corner of the tooth near the root in the second surface and a center position of the hole.
The stator according to the present utility model is characterized by further comprising an insulating member disposed between the stator core and the coil, wherein the insulating member is molded in accordance with a shape near a root of the tooth portion of the stator core.
The stator according to the above-described aspect, wherein the insulating member has a protruding shape that matches the shape of the coil in either the vicinity of an end portion in the first surface of the protruding side of the tooth portion or the vicinity of an end portion in the second surface of the protruding side of the tooth portion.
The stator according to the above, wherein the first surface is substantially parallel to the second surface.
The stator according to the above-described aspect is characterized in that the coil is wound around the tooth from the vicinity of the end portion in the first surface on the protruding side of the tooth, and the coil is wound around the tooth for a plurality of turns, and when the winding of the first layer in the vicinity of the root portion in the second surface of the tooth is completed, the curvature of the shape in the vicinity of the root portion in the second surface, which is the surface on the winding completion side of the first layer, is larger than the curvature of the shape in the vicinity of the root portion in the first surface, which is the surface on the winding start side of the first layer.
An electric motor is characterized by comprising the stator.
In addition, in order to achieve the above object, a stator core according to an aspect of the present utility model is a stator core that is a part of a stator and is formed by stacking a plurality of steel plates, the stator core including a tooth portion having: a first surface intersecting a circumferential direction of the stator; and a second surface intersecting the circumferential direction and provided on a side opposite to the first surface, a curvature of a shape near a root in the first surface of the tooth portion being different from a curvature of a shape near a root in the second surface of the tooth portion.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present utility model, the width of the magnetic path can be adjusted by changing the curvature, and thus the flow of the magnetic flux can be improved.
Drawings
Fig. 1 is a diagram showing an example of a structure of a stator core according to an embodiment.
Fig. 2 is a diagram showing an example of a stator (stator) according to an embodiment.
Fig. 3 is an external view of a stator core and an insulating member according to an embodiment.
Fig. 4 is a cross-sectional view of a stator core to which an insulating member and a coil are attached according to an embodiment.
Description of the reference numerals
10: a stator core; 20: a stator; 100: a steel plate; 200: an insulating member; 300: a coil; 140: a first surface; 150: a second surface; 190: teeth.
Detailed Description
Hereinafter, embodiments of the present utility model will be described with reference to the drawings. The drawings are merely schematic views for explaining the embodiments, and for example, the dimensions of the elements in the drawings do not necessarily reflect actual dimensions. In the drawings, the same elements are denoted by the same reference numerals, and description thereof will be omitted in the present specification.
Fig. 1 is a diagram showing an example of a structure of a stator core according to an embodiment. The stator core 10 is formed by stacking a plurality of steel plates 100. The stator core 10 is covered with an insulating member (insulator) 200, and a coil 300 is wound around the insulating member 200. The stator core 10 is formed with a convex portion 120 and a concave portion 130, and a hole 110 for fastening a bolt is provided in a direction perpendicular to the paper surface.
Fig. 2 is a diagram showing an example of a stator (stator) according to an embodiment. The stator 20 is configured by arranging and coupling a plurality of stator cores 10 each having the insulating member 200 and the coil 300 mounted thereon in the circumferential direction. Each stator core 10 is also referred to as a split core. In the illustrated example, twelve stator cores 10 are connected in the circumferential direction 250 to form the stator 20. The protruding portion 120 and the recessed portion 130 provided to each stator core 10 are used to connect with the adjacent stator cores 10, thereby connecting the stator cores 10 to each other. The stator 20 is a stator of salient pole concentrated windings. The motor, not shown, may be configured to include the stator 20 according to the present embodiment.
Fig. 3 is an external view of the stator core 10 and the insulating member 200 according to the embodiment. As shown in fig. 3, the stator core 10 is formed by stacking a plurality of T-shaped steel plates 100. The stator core 10 includes a tooth 190, and the tooth 190 includes: a first surface 140 intersecting a circumferential direction 250 when forming the stator 20; and a second surface 150 intersecting the circumferential direction 250 and disposed on the opposite side of the first surface 140. The tooth 190 is formed by stacking the convex portions 180, which are part of the T-shape of each steel plate 100, and protrudes toward the center of the stator 20. The first surface 140 is disposed parallel or substantially parallel to the second surface 150.
The coil 300 is wound around the teeth 190 of the stator core 10 via the insulating member 200. Moreover, the curvature of the shape of the root vicinity 160 in the first surface 140 of the tooth 190 and the curvature of the shape of the root vicinity 170 in the second surface 150 of the tooth 190 are formed differently according to the arrangement of the coil 300. Details of the differences in curvature will be described later.
The insulating member 200 is configured to include: a first insulating member 200a; and a second insulating member 200b engaged with the first insulating member 200 a. The insulating member 200 may be attached to the stator core 10 so as to cover the tooth portions 190. The insulating member 200 is not necessarily limited to the illustrated shape, and can be variously modified. As described above, the stator core 10 has the hole portion 110 for bolt fastening. Each steel plate 100 has a hole portion, and the hole portion 110 for fastening a bolt is formed by stacking steel plates.
Fig. 4 is a cross-sectional view of a stator core 10 to which an insulating member 200 and a coil 300 according to an embodiment are attached. For example, a horizontal cross-sectional view of the stator core 10 shown in fig. 1.
In the present embodiment, the curvature of the shape of the root vicinity 170 in the second surface 150 of the tooth 190 is formed to be larger than the curvature of the shape of the root vicinity 160 in the first surface 140 of the tooth 190. That is, in the case of bilateral symmetry, the shape is a curvature shown by a broken line 401, but the area of the steel sheet 100 is increased by an amount equivalent to the left-lower direction of the paper surface than the broken line 401. Accordingly, the magnetic path width of the steel sheet 100 is increased by an amount corresponding to the displacement, and thus the magnetic path width can be increased without changing the coil occupation ratio.
In this way, the curvature of the shape near the root 160 in the first surface 140 is formed to be different from the curvature of the shape near the root 170 in the second surface 150, and thus the magnetic path width can be changed without changing the coil occupancy rate.
The insulating member 200 is shaped in a manner that matches the shape of the root vicinity 160 in the first surface 140 of the tooth 190 and the shape of the root vicinity 170 in the second surface 150 of the tooth 190 and is suitable for the stator core 10. As shown in fig. 3, when the insulating member 200 is constituted by the first insulating member 200a and the second insulating member 200b engaged with the first insulating member 200a, an error in direction at the time of assembly can be prevented. For example, even if the stator core 10 is to be assembled with the first insulating member 200a being positioned below and the second insulating member 200b being positioned above, the assembly cannot be performed due to the difference in curvature, that is, the difference in shape, in the vicinity of the root. In this way, erroneous assembly of the insulating member 200 can be prevented.
In the illustrated example, the coil 300 is wound around the stator core 10 via the insulating member 200. The position of the coil 300a is the start of winding, and is wound to the position of the coil 300b toward the upper side of the paper, and then to the position of the coil 300c, the position of the coil 300d, the position … … of the coil 300e, and the winding of the first layer at the position of the coil 300t is completed. The winding of the second layer is then started from the position of the coil 300 u. Similarly, winding is performed downward on the paper surface. The winding of the third layer is performed in the direction above the paper surface. Thereafter, the same operation is repeated to wind the coil 300.
Thus, in the example of fig. 4, the coil 300 is wound from the vicinity of the end portion of the first surface 140 on the protruding side of the tooth 190, the coil 300 is wound around the tooth 190 of the stator core 10 a plurality of times, and the first layer winding is completed at the vicinity of the root portion of the second surface 150 of the tooth 190. At this time, the curvature of the shape of the root vicinity 170 in the second surface 150 is formed to be larger than the curvature of the shape of the root vicinity 160 in the first surface 140. Thus, the coil 300t in the vicinity of the root 170 in the second surface 150 can be fitted with the insulating member 200, and on the other hand, the space (gap) generated between the coil 300 in the vicinity of the root 160 in the first surface 140 and the insulating member 200 can be reduced. This increases the width of the magnetic path and reduces the unused space, thereby enabling efficient use of space.
In the vicinity of the end portion in the second surface 150 on the protruding side (side toward the center position of the stator 20) of the tooth 190, a protruding shape 402 that matches the shape of the coil 300 is provided. When the coil 300a is wound from its position to its position in the coil 300b, the coil 300b is stably positioned because it is placed on the protruding shape 402. That is, the projection 402 is a mounting portion for mounting the coil 300. In the illustrated example, the protruding shape 402 is provided on the side of the second surface 150, but the protruding shape 402 may be provided on the side of the first surface 140 (a position near the coil 300 a). In this way, the insulating member 200 has a protruding shape 402 matching the shape of the coil 300 in either one of the vicinity of the end portion in the first surface 140 on the protruding side of the tooth 190 and the vicinity of the end portion in the second surface 150 on the protruding side of the tooth 190. This stabilizes the position of the coil wound in the oblique direction.
In the illustrated example, the protruding shape 402 is formed near the inner diameter side of the stator 20, that is, the end of the tooth portion 190 of the second surface 150 (on the side closer to the center position of the stator 20). However, the outer diameter side of the stator 20, that is, the vicinity of the root of the tooth portion 190 of the second surface 150 (the side of the stator 20 away from the center position) may be formed. Similarly, the outer diameter side of the stator 20, that is, the vicinity of the root of the tooth 190 of the first surface 140 may be formed.
The hole 110 for fastening the bolt of the stator core 10 is provided at the following position: the distance L1 between the corner of the tooth 190 and the hole 110 in the root vicinity 160 in the first surface 140 is equal to the distance L2 between the corner of the tooth 190 and the hole 110 in the root vicinity 170 in the second surface 150. That is, the circular hole 110 is provided with the center position P shifted (offset) in the left direction of the paper surface from the center position O in the case of bilateral symmetry.
The distance from the outer edge of the hole 110 is used here, but the distance from the center of the hole 110 may be used. That is, the hole 110 may be provided at the following positions: the distance between the corner of the tooth 190 near the root 160 in the first surface 140 and the center position P of the hole 110 is equal to the distance between the corner of the tooth 190 near the root 170 in the second surface 150 and the center position P of the hole 110.
In this way, the positions of the holes 110 are shifted by the amount of increase in the magnetic path width on the left side of the paper, and the magnetic path widths on the right and left sides are equalized. This can further improve the flow of the magnetic flux, and can improve the torque of the motor. Therefore, the number of stacked steel sheets 100 can be reduced, and the manufacturing cost and the material cost can be reduced.
Further, it is assumed that the bolts fastened to the hole 110 are made of a material different from the steel plate 100, and that the hole 110 does not function as a magnetic path even if the bolts are fastened.
< summary of embodiments >
1. In the stator of the first aspect, the stator 20 includes: a stator core 10 formed by stacking a plurality of steel plates 100; and a coil 300 wound around the stator core, wherein the stator is a salient pole concentrated winding stator including a plurality of stator cores arranged in a circumferential direction 250, and the stator core includes teeth 190 having: a first surface 140 intersecting the circumferential direction 250; and a second surface 150 intersecting the circumferential direction and provided on a side opposite to the first surface, the coil being wound around the tooth portion of the stator core, a curvature of a shape near a root 160 in the first surface of the tooth portion being different from a curvature of a shape near a root 170 in the second surface of the tooth portion.
This can improve the flow of magnetic flux. In addition, the magnetic path width can be changed without changing the coil area ratio.
2. In the stator of the second aspect, the stator core has a hole portion 110 for bolt fastening, the hole portion being provided at: a distance L1 between a corner of the tooth near the root in the first surface and the hole is equal to a distance L2 between a corner of the tooth near the root in the second surface and the hole.
In this way, the position of the hole is adjusted so that the widths of the magnetic paths are equal, and thereby the flow of the magnetic flux can be improved, and the torque of the motor can be improved. Therefore, the number of stacked steel sheets can be reduced, and the manufacturing cost can be reduced.
3. In the stator of the third aspect, the hole portion is provided at: a distance between a corner of the tooth near the root in the first surface and a center position P of the hole is equal to a distance between a corner of the tooth near the root in the second surface and a center position P of the hole.
In this way, the position of the hole is adjusted so that the widths of the magnetic paths are equal, and thereby the flow of the magnetic flux can be improved, and the torque of the motor can be improved. Therefore, the number of stacked steel sheets can be reduced, and the manufacturing cost can be reduced. In addition, the stator core and the stator can be miniaturized.
4. The stator according to the fourth aspect further includes an insulating member 200 disposed between the stator core and the coil, and the insulating member is molded in accordance with a shape near a root portion of the tooth portion of the stator core.
Thus, the insulating member is composed of a plurality of members, and erroneous assembly can be prevented when the insulating member is assembled so as to cover the tooth portions of the stator core.
5. In the stator of the fifth aspect, the insulating member has a protruding shape 402 that matches the shape of the coil in either the vicinity of an end in the first surface of the protruding side of the tooth or the vicinity of an end in the second surface of the protruding side of the tooth.
The position of the coil is determined in cooperation with the protruding shape, so that the coil can be prevented from being displaced, and the position of the coil can be stabilized.
6. In the stator of the sixth aspect, the first surface is substantially parallel to the second surface.
This facilitates the winding operation of the coil.
7. In the stator of the seventh aspect, the coil is wound around the tooth from the vicinity of the end portion in the first surface on the protruding side of the tooth, and the coil is wound around the tooth a plurality of times, and when the winding of the first layer in the vicinity of the root portion in the second surface of the tooth is completed, the curvature of the shape in the vicinity of the root portion in the second surface, which is the winding end side of the first layer, is larger than the curvature of the shape in the vicinity of the root portion in the first surface, which is the winding start side of the first layer.
This makes it possible to increase the width of the magnetic path near the root of the tooth portion of the winding start side surface of the coil without changing the coil area ratio.
8. In the motor of the eighth aspect, the motor is a motor provided with the stator according to any one of the first to seventh aspects.
Thus, the stator with the increased magnetic path width is used, and the performance of the motor can be improved.
9. In the stator core of the ninth aspect, the stator core 10 is a part of the stator 20, and is formed by stacking a plurality of steel plates 100, and includes a tooth portion 190 having: a first surface 140 intersecting a circumferential direction 250 of the stator; and a second surface 150 intersecting the circumferential direction and provided on the opposite side from the first surface, a curvature of a shape of a root vicinity 160 in the first surface of the tooth portion being different from a curvature of a shape of a root vicinity 170 in the second surface of the tooth portion.
This can improve the flow of magnetic flux. In addition, the magnetic path width can be changed without changing the area ratio of the coil wound around the stator core.
The present utility model is not limited to the above-described embodiments, and various modifications and changes can be made within the scope of the gist of the present utility model.
Claims (9)
1. A stator, comprising: a stator core formed by stacking a plurality of steel plates; and a coil wound around the stator core, the stator being a stator of a salient pole concentrated winding including a plurality of stator cores arranged in a circumferential direction,
the stator core includes a tooth portion having: a first surface intersecting the circumferential direction; and a second surface intersecting the circumferential direction and disposed on a side opposite to the first surface,
the coil is wound around the teeth of the stator core,
the curvature of the shape near the root in the first surface of the tooth is different from the curvature of the shape near the root in the second surface of the tooth.
2. The stator as claimed in claim 1, wherein,
the stator core has a hole portion for fastening a bolt,
the hole part is arranged at the following positions: a distance between a corner of the tooth portion near the root portion in the first surface and the hole portion is equal to a distance between a corner of the tooth portion near the root portion in the second surface and the hole portion.
3. The stator as claimed in claim 2, wherein,
the hole part is arranged at the following positions: a distance between a corner of the tooth near the root in the first surface and a center position of the hole is equal to a distance between a corner of the tooth near the root in the second surface and a center position of the hole.
4. The stator as claimed in claim 1, wherein,
further comprising an insulating member disposed between the stator core and the coil,
the insulating member is molded in cooperation with a shape near a root of the tooth portion of the stator core.
5. The stator as claimed in claim 4, wherein,
the insulating member has a protruding shape that matches the shape of the coil in either one of the vicinity of an end in the first surface of the protruding side of the tooth and the vicinity of an end in the second surface of the protruding side of the tooth.
6. The stator as claimed in claim 1, wherein,
the first surface is substantially parallel to the second surface.
7. The stator as claimed in claim 1, wherein,
the coil is wound around the tooth from the vicinity of the end portion in the first surface of the protruding side of the tooth, the coil is wound around the tooth for a plurality of turns, and in the case where the winding of the first layer in the vicinity of the root portion in the second surface of the tooth is completed,
the curvature of the shape near the root in the second surface, which is the surface on the winding end side of the first layer, is larger than the curvature of the shape near the root in the first surface, which is the surface on the winding start side of the first layer.
8. An electric machine, which is characterized in that,
a stator according to any one of claims 1 to 7.
9. A stator core is characterized in that the stator core is a part of a stator and is formed by laminating a plurality of steel plates,
the stator core includes a tooth portion having: a first surface intersecting a circumferential direction of the stator; and a second surface intersecting the circumferential direction and disposed on a side opposite to the first surface,
the curvature of the shape near the root in the first surface of the tooth is different from the curvature of the shape near the root in the second surface of the tooth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-036380 | 2022-03-09 | ||
| JP2022036380A JP7498208B2 (en) | 2022-03-09 | 2022-03-09 | Stator, motor and stator core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219477689U true CN219477689U (en) | 2023-08-04 |
Family
ID=87458594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320369777.XU Active CN219477689U (en) | 2022-03-09 | 2023-03-02 | Stator, motor and stator core |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7498208B2 (en) |
| CN (1) | CN219477689U (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3765186B2 (en) | 1998-07-15 | 2006-04-12 | 日産自動車株式会社 | motor |
| JP3353758B2 (en) | 1999-09-27 | 2002-12-03 | ダイキン工業株式会社 | Motor insulator |
| JP7167849B2 (en) | 2019-05-21 | 2022-11-09 | 株式会社デンソー | stator assembly and motor |
-
2022
- 2022-03-09 JP JP2022036380A patent/JP7498208B2/en active Active
-
2023
- 2023-03-02 CN CN202320369777.XU patent/CN219477689U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP7498208B2 (en) | 2024-06-11 |
| JP2023131552A (en) | 2023-09-22 |
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