CN220732437U - Stator core assembly and motor - Google Patents
Stator core assembly and motor Download PDFInfo
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- CN220732437U CN220732437U CN202322213741.5U CN202322213741U CN220732437U CN 220732437 U CN220732437 U CN 220732437U CN 202322213741 U CN202322213741 U CN 202322213741U CN 220732437 U CN220732437 U CN 220732437U
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- stator core
- core assembly
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- 230000000295 complement effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 abstract description 28
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Abstract
The present utility model relates to a stator core assembly and a motor, the stator core assembly including a plurality of individual base units, each base unit including a plurality of individual base members, each base member having a tooth portion extending in a radial direction and a circumferential portion extending in a circumferential direction, the plurality of individual base members of each base unit being sequentially stacked in an axial direction such that the tooth portions of all base members of each base unit collectively form the tooth portions of the base units, and the circumferential portions of all base members of each base unit collectively form the circumferential portions of the base units; the respective base members of each base unit are sequentially connected with the corresponding base members of the adjacent base units, thereby forming a stator core assembly in a closed ring shape. The stator core assembly is connected by a plurality of independent basic units, so that a larger winding space is provided during winding, and the plurality of basic units can be wound simultaneously.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a stator core assembly and a motor with the stator core assembly.
Background
The motor has a stator assembly and a rotor assembly. Generally, a stator assembly includes a stator core assembly having windings wound thereon. In a common stator core assembly, a stator core is formed by stacking a plurality of silicon steel sheets, and then windings are wound on stator teeth. Since the silicon steel sheet itself is in a closed ring shape, the stator teeth protrude radially inward, so that only an inner winding mode can be adopted when winding the windings, which limits the slot filling rate in consideration of the size of the stator. Also, to facilitate winding, one way is to increase slot space, however larger slots can lead to greater torque ripple.
In addition, in a conventional motor, a plurality of stator teeth which are located at the same position in the circumferential direction in the stator core and are stacked on each other are completely overlapped in the axial direction, and thus the formed tooth slot is called a straight slot, and the tooth slot in the form of the straight slot makes the tooth slot torque of the motor high.
Disclosure of Invention
In order to solve one or more of the above technical problems at least to a certain extent, the present utility model proposes the following technical solutions.
A stator core assembly, the stator core assembly comprising:
a plurality of individual base units, each base unit including a plurality of individual base members, each base member having a tooth portion extending in a radial direction and a circumferential portion extending in a circumferential direction, the plurality of individual base members of each base unit being sequentially stacked in an axial direction such that the tooth portions of all base members of each base unit collectively form the tooth portion of the base unit and the circumferential portion of all base members of each base unit collectively form the circumferential portion of the base unit;
the respective base members of each base unit are sequentially connected with the corresponding base members of the adjacent base units, thereby forming the stator core assembly in a closed ring shape.
According to the above scheme, the stator core assembly is formed by connecting a plurality of independent basic units, so that all basic units forming the stator core assembly can be arranged along a straight line during winding, thereby having larger winding space and simultaneously winding a plurality of basic units. Accordingly, the slot filling rate of the stator thus formed is also higher. In addition, the basic units are of a mutually separated structure, each basic unit is composed of a plurality of separated basic components, so that the basic components are easier to manufacture, store and transport, and the required volume is smaller.
According to one example of the utility model, the circumferentially extending profile of the radially proximal end of the tooth of the basic member is provided with a recess.
According to one example of the utility model, the recess is circular arc shaped and is located in the middle of the circumferentially extending profile. By providing such recesses in the teeth, higher harmonics can be reduced, thereby improving the NVH performance of the motor when running.
According to one example of the utility model, the tooth of the basic unit has two radial sides, only one of which is visible when viewed in the axial direction.
By this arrangement, the tooth spaces formed between the tooth parts of two adjacent basic units are no longer extended in a direction parallel to the axial direction, but are formed as oblique tooth spaces. With this form of cogging, cogging torque can be greatly reduced.
According to an example of the present utility model, each of the base members forming one base unit is not completely overlapped with each other as viewed in the axial direction.
According to an example of the present utility model, the circumferential portion of the base member is provided with a mounting portion for connection with a tool.
According to one example of the present utility model, the circumferential portion of the base member has two positioning portions, and each base member is connected with two adjacent base members through the two positioning portions.
According to one example of the utility model, the two positioning portions are complementary in shape.
By providing complementary positioning portions, adjacent base members or base units can be easily connected to each other and centering can be achieved, so that a plurality of base members or base units are connected to form one stator core assembly.
The utility model also provides a motor which comprises the stator core assembly.
Drawings
Exemplary embodiments of the present utility model are described with reference to the accompanying drawings, in which:
fig. 1 shows a perspective view of a stator core assembly of the present utility model.
Fig. 2 shows a perspective view of a basic unit of the stator core assembly of the present utility model.
Fig. 3 shows a front view of the basic components.
Fig. 4 shows a perspective view of the basic components.
Fig. 5 shows a schematic arrangement of the basic units of the stator winding of the present utility model.
Fig. 6 shows a top view of the stator core assembly of the present utility model.
All the figures are schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the utility model, the other parts being omitted or merely mentioned. That is, the present utility model may include other components in addition to those shown in the drawings.
In the drawings, identical and/or functionally identical technical features are provided with the same or similar reference signs.
Detailed Description
Embodiments of the present utility model are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding and enabling description of the utility model to one skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. Furthermore, it should be understood that the utility model is not limited to specific described embodiments. Rather, any combination of the features and elements described below is contemplated to implement the utility model, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered features or limitations of the claims except where explicitly set out in a claim.
Description of orientations such as "upper", "lower", "inner", "outer", "radial", "axial", etc. which may be used in the following description are for convenience of description only and are not intended to limit the inventive arrangements in any way unless explicitly stated. Furthermore, terms such as "first," "second," and the like, are used hereinafter to describe elements of the present application, and are merely used for distinguishing between the elements and not intended to limit the nature, sequence, order, or number of such elements.
Fig. 1 shows a perspective view of a stator core assembly of the present utility model. As can be seen from fig. 1, the stator core assembly 1000 of the present utility model is composed of a plurality of base units 100, and the plurality of base units 100 are connected to each other in the circumferential direction, thereby forming a complete stator core assembly 1000. Radially inward of the stator core assembly 1000, there is a cavity 1001. The stator core assembly has a circular outer contour, with an axis or defining an axis, respectively.
For prior art stator core assemblies, they are formed of a plurality of base units stacked axially, each base unit having an annular body with a plurality of stator teeth projecting radially inwardly therefrom. Also, in the prior art stator core assembly, there is a cavity in the radial interior. As already indicated in the background art, the winding is limited by the size of the cavity, since only an inner winding can be used when winding the windings on the stator teeth.
In order to overcome the above-mentioned drawbacks of the prior art, the present utility model proposes different forms of basic units. Fig. 2 shows a perspective view of a basic unit of the stator core assembly of the present utility model. As can be seen from fig. 2, each base unit 100 is formed by stacking a plurality of base members 10 in the axial direction. Fig. 5 shows a schematic arrangement of the basic units of the stator winding of the present utility model. As can be seen from fig. 5, a plurality of base units 100 are arranged on the fixture 200 along a straight line during winding, and then the wire is wound on the stator teeth. As can be seen from fig. 5, since the plurality of base units 100 are arranged in a straight line during winding, a space available for winding is larger, and winding can be performed only inside the circumferential direction thereof unlike the circular stator core in the related art. In addition, because the space is bigger, consequently also can realize carrying out the wire winding simultaneously on a plurality of stator teeth, improved wire winding efficiency. When the winding is completed, the plurality of base units 100 shown in fig. 5 may be formed into a closed ring-shaped structure shown in fig. 1, i.e., a stator core assembly, through a winding process. Accordingly, according to the same winding process, more wires can be wound in the tooth grooves of the stator with the same size, so that the groove filling rate of the stator is higher.
Of course, those skilled in the art will appreciate that the plurality of base units 100 need not be arranged in a straight line, may be arranged in a curved line, or may be arranged in other non-closed arrangements. A larger winding space than the cavity 1001 shown in fig. 1 can be provided as long as it is ensured that a plurality of base units do not form a closed form.
On the basis of the above basic idea, the present utility model also proposes other improvements, which will be described below.
Fig. 3 shows a front view of the basic components. Fig. 4 shows a perspective view of the basic components. As can be seen in connection with fig. 3 and 4, the base member 10 has a body including teeth 11, and in the stator core assembly, the teeth 11 extend in a radial direction. The tooth 11 has two radially extending profiles, preferably parallel to each other, and a circumferentially extending profile at the radially proximal end. Here, the radially proximal end refers to an end near the axis of the stator core assembly. Accordingly, the radially distal end is the end that is remote from the axis of the stator core assembly, i.e., the end opposite the radially proximal end.
A circumferential portion 12 having two arm portions is formed extending from the radially distal end of the tooth portion 11 to both sides in the circumferential direction. The circumferential portion 12 has a circumferential outer side profile and a circumferential inner side profile, and the tooth portion 11 is connected to the circumferential inner side profile.
On the circumferential portion 12, in order to connect the base member 10 with the tooling 200, a mounting portion 13 is provided. Preferably, a radially inward recess is provided on the circumferential outer side profile of the circumferential portion 12, thereby forming the mounting portion 13. It is also conceivable to provide radially outward projections on the circumferential outer contour of the circumferential portion 12, thereby forming the mounting portion 13. Accordingly, the fixture 200 may be provided with a structure complementary to the shape of the mounting portion 13. The mounting portion 13 is preferably provided in the middle of the circumferential outer profile.
As can also be seen from fig. 3 and 4, the circumferential portion 12 has two radial contours in the radial direction, on which the positioning portion 14 is formed. Specifically, on one of the radial profiles, the positioning portion 14 takes the form of a protrusion, and on the other radial profile, the positioning portion 14 takes the form of a recess. Thus, when the plurality of base members 10 are sequentially connected to form one complete closed structure in the circumferential direction, the two positioning portions 14 on each base member 10 are respectively connected with the corresponding positioning portions 14 on the adjacent two base members 10, thereby fixing the plurality of base members 10. Preferably, the outer contour of the positioning portion 14 has two circular arc portions around the axis, so that the positioning portion 14 has a centering function.
As an important improvement of the utility model, recesses 15 are provided in the tooth 11 of the basic element 10 on the radially proximal circumferentially extending contour. Preferably, the recess 15 is circular arc-shaped. Preferably, the recess 15 is located in the middle of said circumferentially extending profile. By providing such recesses in the teeth 11, harmonics can be reduced, thereby improving NVH performance when the motor is operated.
As another important improvement of the present utility model, it can be seen in connection with fig. 1, 2 and 6 that in the stator core assembly of the present utility model, the tooth portion of each basic unit 100 has two radial side surfaces on both sides thereof, and only one of the two radial side surfaces can be observed when viewed in the axial direction. In other words, the radial side surface that can be observed is inclined or angled with respect to the plane parallel to said axis and passing through a radially extending edge of a tooth of any one of the basic elements of the basic unit, as is particularly evident in fig. 6. In fig. 6, it can be seen that the black portion, that is, one radial side corresponding to the tooth portion of the base unit 100, is seen in a direction perpendicular to the paper surface, that is, in the axial direction. Preferably, the two radial sides of the teeth of the base unit 100 are parallel to each other.
By this arrangement, the space formed between the teeth of two adjacent base units 100, also called a tooth slot, is no longer each surface extending in a direction parallel to the axial direction, i.e., a so-called straight slot, but is formed as an inclined tooth slot. With this form of cogging, cogging torque can be greatly reduced.
As is apparent from fig. 1 and 2, when a single base member 10 is employed to form the stator core assembly shown in fig. 6, this can be achieved by having each base member 10 of each base unit 100 in turn offset from the adjacent base member 10 when stacked. This offset can be seen in fig. 1 from the fact that the mounting portions of each base member 10 of each base unit 100 together form an obliquely extending groove. In other words, each of the base members forming one base unit is not completely overlapped with each other as viewed in the axial direction.
As shown in fig. 4, a plane of the base member 10 perpendicular to the axis is referred to as a first plane P1, and a side surface of the tooth portion of the base member for defining the thickness of the base member is referred to as a second plane P2. Preferably, in order to make the radial side of the tooth portion of each base unit 100 a flat plane, the second plane P2 of each base member 10 is not perpendicular to the first plane P1 but has a certain inclination at the time of manufacture.
The structure and preparation of the stator core assembly of the present utility model and the manner of winding the same thereon are described in detail above.
While the present utility model has been described with respect to the above exemplary embodiments, it will be apparent to those skilled in the art that various other embodiments can be devised by modifying the disclosed embodiments without departing from the spirit and scope of the utility model. Such embodiments should be understood to fall within the scope of the utility model as determined based on the claims and any equivalents thereof.
Claims (9)
1. A stator core assembly, the stator core assembly comprising:
a plurality of individual base units, each base unit including a plurality of individual base members, each base member having a tooth portion extending in a radial direction and a circumferential portion extending in a circumferential direction, the plurality of individual base members of each base unit being sequentially stacked in an axial direction such that the tooth portions of all base members of each base unit collectively form the tooth portion of the base unit and the circumferential portion of all base members of each base unit collectively form the circumferential portion of the base unit;
the respective base members of each base unit are sequentially connected with the corresponding base members of the adjacent base units, thereby forming the stator core assembly in a closed ring shape.
2. The stator core assembly of claim 1 wherein,
the circumferentially extending profile of the radially proximal end of the teeth of the basic member is provided with recesses.
3. The stator core assembly of claim 2 wherein,
the recess is circular arc-shaped and is positioned in the middle of the circumferentially extending profile.
4. The stator core assembly of any of claims 1-3 wherein,
the teeth of the basic unit have two radial sides, only one of which is visible when viewed in the axial direction.
5. The stator core assembly of any of claims 1-3 wherein,
when viewed in the axial direction, there is no complete overlap between each of the base members forming one base unit.
6. The stator core assembly of any of claims 1-3 wherein,
the circumferential portion of the basic member is provided with a mounting portion for connection with a tool.
7. The stator core assembly of any of claims 1-3 wherein,
the circumferential portion of the base member has two positioning portions, and each base member is connected with two adjacent base members through the two positioning portions.
8. The stator core assembly of claim 7 wherein,
the shapes of the two positioning parts are complementary.
9. An electric machine comprising the stator core assembly of any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322213741.5U CN220732437U (en) | 2023-08-17 | 2023-08-17 | Stator core assembly and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322213741.5U CN220732437U (en) | 2023-08-17 | 2023-08-17 | Stator core assembly and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220732437U true CN220732437U (en) | 2024-04-05 |
Family
ID=90494778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322213741.5U Active CN220732437U (en) | 2023-08-17 | 2023-08-17 | Stator core assembly and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220732437U (en) |
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2023
- 2023-08-17 CN CN202322213741.5U patent/CN220732437U/en active Active
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