CN220172934U - Stator punching sheet and stator - Google Patents
Stator punching sheet and stator Download PDFInfo
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- CN220172934U CN220172934U CN202321427528.8U CN202321427528U CN220172934U CN 220172934 U CN220172934 U CN 220172934U CN 202321427528 U CN202321427528 U CN 202321427528U CN 220172934 U CN220172934 U CN 220172934U
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- stator
- teeth
- inner periphery
- arc
- stator teeth
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- 238000004080 punching Methods 0.000 title claims abstract description 27
- 238000004804 winding Methods 0.000 claims description 21
- 238000003475 lamination Methods 0.000 claims description 6
- 230000006698 induction Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model relates to the technical field of motors, in particular to a stator punching sheet and a stator. The utility model provides a stator punching sheet, comprising: a stator yoke having an outer periphery and an inner periphery; a plurality of stator teeth extending inwardly from the inner periphery, stator slots being formed between adjacent stator teeth; the inner periphery of the stator yoke part between adjacent stator teeth comprises an arc-shaped edge positioned in the middle, and two ends of the arc-shaped edge are respectively connected with the stator teeth through straight-line oblique edges. The utility model also provides a stator which is formed by stacking a plurality of stator punching sheets. The problem of poor strength of a stator framework of a motor in the prior art is solved; the magnetic induction line density passing through the stator framework is high, more heat is generated, and the working efficiency is low.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a stator punching sheet and a stator.
Background
The motor is usually in the form of a generator or motor, the middle of which is formed with a rotatable central shaft which, by means of electrical energy applied to the coils within the motor, induces a relative movement which transmits power to the central shaft, causing it to rotate; alternatively, rotation of the central shaft induces relative motion within the motor, and mechanical energy of the relative motion excites electrical energy into the coils.
The motor has a stator and a rotor within it, the stator comprising a stator core and coils or windings positioned around portions of the stator core, it being these coils that are energized to initiate rotational movement of the central shaft. These coils are formed by winding a metal wire (typically copper, aluminum or a combination thereof) around a stator core to form a winding or coil. In the assembled configuration, the coils are positioned in spaced apart relation around a stator core, which typically has a generally hollow cylindrical configuration with the coils located inside. The power of the motor depends on the amount of electrical energy that can be applied to the coils, and the amount of electrical energy is proportional to the amount of wire that can be positioned around the stator core.
A brushless motor is disclosed in the document of application number CN202011578578.7, and specifically: the brushless motor comprises an outer stator unit and an inner rotor unit, wherein the outer stator unit and the inner rotor unit are concentric rings, the outer stator unit comprises a circular stator framework and a plurality of armature windings, the inner rotor unit comprises a circular rotor core, a rotor sleeve and a rotor shaft, the rotor core is connected with the rotor sleeve, the rotor sleeve is arranged on the rotor shaft, the rotor core is close to the annular surface of the outer stator unit, a plurality of rotor teeth and rotor grooves are alternately arranged in the circumferential direction, permanent magnets are arranged in the rotor grooves, the permanent magnets correspond to the rotor grooves one by one, and the permanent magnets are embedded into the corresponding rotor grooves. The brushless motor can realize the rotation operation of the motor, but the stator framework is annular, and has poor strength and easy breakage in the stacking process; and the magnetic induction linear density passing through the stator framework is high, more heat is generated, and the working efficiency is low.
Disclosure of Invention
In order to solve the problem that the strength of a stator framework of a motor in the prior art is poor; the utility model provides a stator punching sheet and a stator, which solve the technical problems of high magnetic induction linear density, more heat generation and low working efficiency of the stator framework.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a stator punching sheet, comprising:
a stator yoke having an outer periphery and an inner periphery;
a plurality of stator teeth extending inwardly from the inner periphery, stator slots being formed between adjacent stator teeth;
the inner periphery of the stator yoke part between adjacent stator teeth comprises an arc-shaped edge positioned in the middle, and two ends of the arc-shaped edge are respectively connected with the stator teeth through straight-line oblique edges.
According to one embodiment of the utility model, the junction of the straight bevel edge and the stator teeth forms a first rounded corner.
According to one embodiment of the present utility model, the included angle α formed by the straight bevel edges at the two ends of the arc edge is an obtuse angle.
According to one embodiment of the utility model, the angle alpha formed by the straight bevel edges at the two ends of the arc-shaped edge is 138 degrees.
According to one embodiment of the utility model, an opening is formed at the joint of the stator yoke and the stator teeth.
According to one embodiment of the utility model, the openings are elongated holes, which extend radially.
According to one embodiment of the utility model, the stator teeth include winding portions that meet an inner periphery of the stator yoke, and tooth portions that are located at an inner periphery of the winding portions, and circumferential both ends of the tooth portions are protruded as compared to the winding portions.
According to one embodiment of the utility model, the inner end of the tooth part far away from the winding part is provided with an inner arc edge, two circumferential ends of the tooth part are respectively provided with an end edge, and the joint of the inner arc edge and the end edge is provided with a second round angle.
The utility model also provides a stator which is formed by stacking a plurality of stator punching sheets.
Based on the technical scheme, the utility model has the following technical effects:
according to the stator punching sheet, the inner periphery of the stator yoke part between adjacent stator teeth comprises the arc-shaped edge positioned in the middle, two ends of the arc-shaped edge are respectively connected with the stator teeth through the linear bevel edge, and the arc-shaped edge is connected with the linear bevel edge structure; in addition, the magnetic induction linear density of the joint of the stator yoke part and the stator teeth is reduced, the generated heat is reduced, and the working efficiency is improved; in addition, the magnetic circuit of the magnetic induction wire at the stator yoke part is straight line, arc line and straight line, and compared with the condition that the magnetic circuit of the magnetic induction wire at the stator yoke part in the prior art is arc line, the magnetic circuit of the utility model is shortened, the loss is reduced, and the working efficiency is improved;
according to the stator punching sheet, through limiting the included angle formed by the straight bevel edges at the two ends of the arc edge, the space of the stator slot can be ensured under the condition of increasing the width of the stator yoke part, and the assembly of the winding is not influenced;
the stator punching sheet can be positioned during stacking by arranging the holes, and in addition, the weight of the stator can be reduced by arranging a plurality of holes;
the second round angle is formed at the joint of the inner arc edge and the end edge of the tooth part, namely the notch of the stator groove is rounded, compared with the sharp angle, the arrangement of the round angle can reduce magnetic field impact, reduce current impact and prevent interference with a driver; positioning moment can also be reduced;
the stator is formed by stacking a plurality of stator punching sheets, is not easy to deform in the stacking process, and has high working efficiency and less heat generation during working.
Drawings
FIG. 1 is a schematic view of a stator lamination of the present utility model;
fig. 2 is an enlarged view of a portion a of fig. 1;
FIG. 3 is a schematic view of a stator according to the present utility model;
in the figure: 1-a stator yoke; 11-an outer periphery; 12-an inner periphery; 121-arc-shaped edges; 122-straight bevel edge; 13-a first rounded corner; 2-stator teeth; 21-winding part; 22-tooth parts; 221-inner arc edge; 222-end edges; 223-second rounded corner; 3-stator slots; 4-perforating; 5-outer bulge.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
As shown in fig. 1 to 3, the present embodiment provides a stator punching sheet 100, the stator punching sheet 100 being in a sheet shape, being punched from a sheet of silicon steel, the stator punching sheet 100 including a stator yoke 1 and stator teeth 2, the stator yoke 1 having an outer periphery 11 and an inner periphery 12, the stator teeth 2 being plural, the plural stator teeth 2 extending inward from the inner periphery 12 of the stator yoke 1 at intervals, stator slots 3 being formed between adjacent stator teeth 2.
The stator yoke 1 is basically circular, the outer periphery 11 of the stator yoke 1 is basically circular, the inner periphery 12 of the stator yoke 1 between adjacent stator teeth 2 comprises an arc-shaped edge 121 positioned in the middle, two ends of the arc-shaped edge 121 are respectively connected with the stator teeth 2 through linear bevel edges 122, and the arrangement of the linear bevel edges 122 increases the width of the stator yoke 1 at the corresponding position, improves the strength and reduces the magnetic field linear density. In addition, the magnetic circuit is changed from an arc-shaped magnetic circuit in the prior art to a linear-arc-linear magnetic circuit, the magnetic circuit is shortened, the loss is reduced, and the efficiency is improved.
As a preferable technical solution of the present embodiment, the outer protrusions 5 are distributed on the outer periphery 11 of the stator yoke 1, at least two outer protrusions 5 may be provided, at least two outer protrusions 5 are uniformly distributed along the circumferential direction, and the positioning function may be performed by providing the outer protrusions 5 when the stator 100 is press-fitted into the casing.
As a preferable solution of this embodiment, the length of the arc-shaped edge 121 is substantially the same as the length of the straight bevel edge 122.
As a preferred solution of this embodiment, the angle α formed between the two straight bevel edges 122 is an obtuse angle, preferably 138 °.
As a preferred solution of this embodiment, the junction of the straight bevel 122 and the stator teeth 2 is formed with a first rounded corner 13. The first rounded corner 13 may be a rounded corner having a radius of 3 mm.
The stator teeth 2 extend radially inward, and the stator teeth 2 include winding portions 21 and tooth portions 22, the winding portions 21 being contiguous with the inner periphery 12 of the stator yoke 1, the tooth portions 22 being located at inner ends of the winding portions 21. Specifically, the winding portion 21 has two parallel sides, which meet the straight bevel 122, and the connection forms the aforementioned first rounded corner 13; the two circumferential ends of the tooth portion 22 protrude from the winding portion 21, an inner arc edge 221 is formed at the inner end of the tooth portion 22, end edges 222 are formed at the two circumferential ends of the tooth portion 22, the two ends of the inner arc edge 221 are connected with the two end edges 222, and the end edges 222 are connected with the side edges of the adjacent winding portion 21 through oblique edges. In the present embodiment, the number of stator teeth 2 is set to 6.
As a preferred solution of this embodiment, a second rounded corner 223 is formed at the junction of the inner arc edge 221 and the end edge 222, and the second rounded corner 223 may be a rounded corner with a radius of 0.5 mm.
As a preferable technical scheme of the embodiment, fillets are formed at the joint of the end edge and the bevel edge and the joint of the bevel edge and the side edge.
The plurality of stator teeth 2 are uniformly distributed on the inner periphery 12 of the stator yoke 1 in the circumferential direction, and the stator slots 3 between the stator teeth 2 are the same shape. There is a gap between the adjacent end edges 222 of two adjacent stator teeth 2, namely the notch of the stator slot 3.
In order to facilitate stacking of the stator lamination 100, the stator lamination 100 is further provided with an opening 4, and the opening 4 is located at a junction between the stator yoke 1 and the stator teeth 2. In this embodiment, the opening 4 is disposed corresponding to the stator teeth 2, and is centrally located at the junction between the stator yoke 1 and the stator teeth 2.
As a preferred solution of the present embodiment, the openings 4 are provided as elongated holes, the openings 4 extending radially. Further preferably, the openings 4 are provided as square holes. The openings 4 are provided as square long holes, so that the strength of the stator punching sheet 100 is not easily affected, and the weight of the stator punching sheet 100 can be reduced.
The embodiment also provides a stator, which is formed by stacking a plurality of stator punching sheets 100, wherein the thickness of each stator punching sheet 100 is 0.35mm, and the stator of the embodiment can be stacked by 111 stator punching sheets 100, and the stacking coefficient is greater than 0.97.
The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.
Claims (9)
1. A stator lamination, comprising:
a stator yoke (1), the stator yoke (1) having an outer periphery (11) and an inner periphery (12);
a plurality of stator teeth (2), wherein the plurality of stator teeth (2) extend inwards from the inner periphery (12) at intervals, and stator grooves (3) are formed between adjacent stator teeth (2);
the inner periphery (12) of the stator yoke (1) between adjacent stator teeth (2) comprises an arc-shaped edge (121) positioned in the middle, and two ends of the arc-shaped edge (121) are respectively connected with the stator teeth (2) through straight bevel edges (122).
2. A stator punching according to claim 1, characterized in that the junction of the rectilinear sloping edge (122) and the stator teeth (2) forms a first rounded corner (13).
3. A stator punching sheet according to any of claims 1-2, characterized in that the angle α formed by the straight bevel edges (122) at both ends of the arc-shaped edge (121) is an obtuse angle.
4. A stator lamination according to claim 3, characterized in that the straight oblique edges (122) at both ends of the arcuate edge (121) form an angle α of 138 °.
5. A stator punching according to claim 1, characterized in that the junction of the stator yoke (1) and the stator teeth (2) is provided with openings (4).
6. A stator punching according to claim 5, characterized in that the openings (4) are elongated holes, the openings (4) extending radially.
7. A stator punching sheet according to claim 1, characterized in that the stator teeth (2) comprise winding portions (21) and tooth portions (22), the winding portions (21) are connected with the inner periphery (12) of the stator yoke (1), the tooth portions (22) are located at the inner periphery of the winding portions (21), and both ends of the tooth portions (22) in the circumferential direction are protruded as compared with the winding portions (21).
8. A stator punching sheet according to claim 7, characterized in that an inner end of the tooth portion (22) remote from the winding portion (21) is formed with an inner arcuate edge (221), both circumferential ends of the tooth portion (22) are respectively formed with end edges (222), and a second rounded corner (223) is formed at a junction of the inner arcuate edge (221) and the end edges (222).
9. A stator formed by stacking a plurality of stator laminations according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321427528.8U CN220172934U (en) | 2023-06-06 | 2023-06-06 | Stator punching sheet and stator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321427528.8U CN220172934U (en) | 2023-06-06 | 2023-06-06 | Stator punching sheet and stator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220172934U true CN220172934U (en) | 2023-12-12 |
Family
ID=89056298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321427528.8U Active CN220172934U (en) | 2023-06-06 | 2023-06-06 | Stator punching sheet and stator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220172934U (en) |
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2023
- 2023-06-06 CN CN202321427528.8U patent/CN220172934U/en active Active
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