CN221058070U

CN221058070U - Stator punching sheet and motor

Info

Publication number: CN221058070U
Application number: CN202322578600.3U
Authority: CN
Inventors: 丁瑞荣; 钟洪水
Original assignee: Jiangsu Hyson Electronic Technology Co ltd
Current assignee: Jiangsu Hyson Electronic Technology Co ltd
Priority date: 2023-09-22
Filing date: 2023-09-22
Publication date: 2024-05-31
Anticipated expiration: 2033-09-22

Abstract

The utility model relates to the technical field of motors, in particular to a stator punching sheet and a motor. A stator lamination comprising: a stator yoke having an outer periphery and an inner periphery; the stator teeth are arranged on the inner periphery of the stator yoke at intervals, the radial outer ends of the stator teeth are connected with the inner periphery of the stator yoke, the circumferential two ends of the radial inner ends of the stator teeth are expanded outwards, the stator teeth are provided with inner edges, each inner edge comprises an arc-shaped edge positioned in the middle, the two ends of each arc-shaped edge extend to the two circumferential ends through straight edges respectively, and the two straight edges connected with the same arc-shaped edge are collinear. The utility model also provides a motor, comprising: the stator core is formed by stacking a plurality of stator punching sheets; and the rotor is positioned on the inner periphery of the stator core. The motor solves the technical problems of abrupt torque change, high electromagnetic noise and vibration of the rotating direction of the rotor caused by high instantaneous magnetic field impact generated by the motor during current commutation in the prior art.

Description

Stator punching sheet and motor

Technical Field

The utility model relates to the technical field of motors, in particular to a stator punching sheet and a motor.

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; or rotation of the central shaft causes relative movement within the motor, the mechanical energy of which 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.

In the prior art, most of the stator is formed by superposing a plurality of stator punching sheets, as shown in fig. 1-2, each stator punching sheet comprises a stator yoke and stator teeth, the stator teeth are circumferentially and uniformly distributed on the inner periphery of the stator yoke at intervals, stator grooves are formed between adjacent stator teeth, the radial outer ends of the stator teeth are connected with the stator yoke, the radial inner ends of the stator teeth are circumferentially and outwardly expanded, circular arc inner edges are formed, and stator windings are arranged on the stator teeth. As another example, a stator lamination is disclosed in the document CN201420683718.0, which includes: a yoke part formed in a circular shape, wherein a plurality of notches are formed on the outer circumferential surface of the yoke part at intervals along the circumferential direction of the yoke part, a plurality of through holes which are formed on the yoke part at intervals along the circumferential direction of the yoke part and penetrate through the yoke part along the axial direction of the yoke part, a plurality of through holes are formed adjacent to the outer circumferential surface of the yoke part, and any one through hole is formed between two adjacent notches; the teeth are arranged on the inner periphery of the yoke at intervals along the circumferential direction of the yoke, each tooth extends inwards along the radial direction of the yoke, and a stator groove is defined between any two adjacent teeth.

When the motor in the prior art works, the motor coil can generate higher instant magnetic field impact during current commutation, so that the torque is increased, and the electromagnetic noise is high.

Disclosure of utility model

The utility model provides a stator punching sheet and a motor, which solve the technical problems of abrupt torque change, high electromagnetic noise and vibration in the rotating direction of a rotor caused by high transient magnetic field impact generated by the motor during current commutation in the prior art.

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;

The stator teeth are uniformly distributed on the inner periphery of the stator yoke, the radial outer ends of the stator teeth are connected with the inner periphery of the stator yoke, the circumferential two ends of the radial inner ends of the stator teeth are expanded outwards, the stator teeth are provided with inner edges, each inner edge comprises an arc-shaped edge positioned in the middle, the two ends of each arc-shaped edge extend to the two circumferential ends through straight edges respectively, and the two straight edges connected with the same arc-shaped edge are collinear.

According to one embodiment of the utility model, the stator teeth comprise winding portions and tooth portions, the winding portions are connected with the inner periphery of the stator yoke portion, the tooth portions are connected with the inner ends of the winding portions, the two ends of the tooth portions in the circumferential direction are expanded in comparison with the winding portions, and the inner ends of the tooth portions form the inner edges.

According to one embodiment of the utility model, the radial width of the circumferential ends of the tooth portion decreases gradually in a direction away from the arcuate edge.

According to one embodiment of the utility model, the stator teeth are of symmetrical construction.

The utility model also provides a motor, comprising:

the stator core is formed by stacking a plurality of stator punching sheets;

and the rotor is positioned on the inner periphery of the stator core.

According to one embodiment of the utility model, the rotor comprises a rotor core on which the magnetic shoes are mounted.

According to one embodiment of the present utility model, the plurality of magnetic shoes are provided, and the plurality of magnetic shoes are uniformly assembled on the rotor core in the circumferential direction.

According to one embodiment of the utility model, the magnetic shoe is arc-shaped, and both circumferential ends of the outer surface of the magnetic shoe are cut into flat inclined surfaces.

According to one embodiment of the utility model, the flat chamfer extends to a circumferential end surface of the magnetic shoe.

Based on the technical scheme, the utility model has the following technical effects:

According to the stator punching sheet, the inner edge of the stator tooth comprises the arc-shaped edge in the middle, and the two circumferential ends of the arc-shaped edge extend to the two circumferential ends through the straight line edge, so that the gap between the two circumferential ends of the tooth part of the stator tooth and the rotor is increased, the instant magnetic field impact of a motor coil during current reversing can be slowed down, the positioning moment and electromagnetic noise of a permanent magnet brushless motor are reduced, and the torque is smoother and more stable when the power transmission of the motor is achieved; according to the motor, the two circumferential ends of the outer peripheral surface of the magnetic shoe in the rotor are cut into the flat inclined surfaces, so that the instant magnetic field impact of the motor coil during current commutation can be further slowed down, the positioning moment and electromagnetic noise of the permanent magnet brushless motor are reduced, the motor torque is smoother, and meanwhile, the motor torque is increased.

Drawings

FIG. 1 is a schematic view of a stator lamination in the prior art;

FIG. 2 is an enlarged view of the portion A' of FIG. 1;

FIG. 3 is a schematic view of a stator lamination of the present utility model;

fig. 4 is an enlarged view of a portion a of fig. 3;

FIG. 5 is a radial cross-sectional view of a magnetic shoe of the present utility model;

Fig. 6 is an enlarged view of a portion B of fig. 5;

In the figure: 1-a stator yoke; 2-stator teeth; 21-winding part; 22-tooth parts; 221-inner edge; 2211-arcuate edge; 2212—straight line edges; 3-stator slots; 31-notch; 4-magnetic shoe; 41-outer surface; 42-flat inclined plane; 43-rounded corner surface.

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 application. 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 on … …," "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 "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. 3-6, this embodiment provides a stator punching sheet, which is in a sheet shape and is formed by punching a silicon steel sheet, and the stator punching sheet includes a stator yoke portion 1 and stator teeth 2, wherein the stator yoke portion 1 is in an annular structure, the stator teeth 2 are a plurality of, the plurality of stator teeth 2 are uniformly and alternately arranged on the inner periphery of the stator yoke portion 1, and a stator slot 3 is formed between two adjacent stator teeth 2.

The stator yoke 1 is substantially circular, and the outer periphery of the stator yoke 1 is formed with a concave-convex positioning structure for positioning when the stator is assembled into the motor casing. The inner periphery of the stator yoke 1 is a circular arc.

The stator teeth 2 are plural, the radially outer ends of the plural stator teeth 2 are connected to the inner periphery of the stator yoke 1, and the radially inner ends of the stator teeth 2 are formed with inner edges 221. Specifically, the stator teeth 2 may be divided into a winding portion 21 and a tooth portion 22 in the radial direction, the radial outer end of the winding portion 21 is connected to the inner periphery of the stator yoke 1, the radial inner end of the winding portion 21 is connected to the tooth portion 22, the circumferential two ends of the tooth portion 22 are compared with the outer expansion of the winding portion 21, a notch 31 of the stator slot 3 is formed between the tooth portions 22 of two adjacent stator teeth 2, and the notch 31 is arranged as compared with the inner necking of the stator slot 3.

As a preferable embodiment of the present embodiment, the radially outer ends of the winding portions 21 of the stator teeth 2 are in rounded contact with the inner periphery of the stator yoke 1.

As a preferred solution of this embodiment, the inner end of the tooth portion 22 forms an inner edge 221, the inner edge 221 includes an arc-shaped edge 2211 located in the middle, two ends of the arc-shaped edge 2211 extend to two circumferential ends through a straight line edge 2212, and two straight line edges 2212 connected with the same arc-shaped edge 2211 are collinear. Preferably, the stator teeth 2 are of symmetrical construction.

As a preferable solution of the present embodiment, the radial outer ends of the tooth portions 22 contacting the winding portion 21 are beveled edges, and the radial widths of the circumferential ends of the tooth portions 22 gradually decrease in a direction away from the arcuate edge 2211.

The embodiment also provides a motor, which comprises a stator core and a rotor, wherein the stator core is formed by stacking the plurality of stator punching sheets, the rotor is rotationally assembled on the inner periphery of the stator core, the rotor comprises a rotor core, a plurality of magnetic shoes 4 are assembled on the rotor core, and the plurality of magnetic shoes 4 are uniformly assembled on the rotor core along the circumferential direction. Preferably, the rotor core may be provided with a mounting groove for mounting the magnetic shoe 4.

The magnetic shoe 4 is substantially arc-shaped, the magnetic shoe 4 has a substantially arc-shaped outer surface 41, both circumferential ends of the outer surface 41 are cut into flat inclined surfaces 42, and the flat inclined surfaces 42 extend to the circumferential end surfaces of both ends of the magnetic shoe 4 and meet the circumferential end surfaces through rounded corner surfaces 43.

Through the arrangement of the inner edge 221 of the tooth part 22 of the stator punching sheet and the arrangement of the outer surface 41 of the magnetic shoe 4, the instant magnetic field impact of the motor coil during current reversing can be slowed down, so that the positioning moment and electromagnetic noise of the permanent magnet brushless motor are reduced, the motor torque is smoother, and the motor torque is increased.

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

1. A stator lamination, comprising:

A stator yoke (1), the stator yoke (1) having an outer periphery and an inner periphery;

Stator tooth (2), a plurality of stator teeth (2) interval evenly arrange in the inner periphery of stator yoke (1), and the radial outer end of stator tooth (2) meets with the inner periphery of stator yoke (1), the circumference both ends of the radial inner of stator tooth (2) expand outward, stator tooth (2) have interior limit (221), interior limit (221) are including arc limit (2211) that are located the middle part, the both ends of arc limit (2211) extend to circumference both ends through sharp limit (2212) respectively, and two sharp limit (2212) collineation that same arc limit (2211) meet.

2. 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 to the inner periphery of the stator yoke (1), the tooth portions (22) are connected to the inner ends of the winding portions (21), the circumferential ends of the tooth portions (22) are flared as compared to the winding portions (21), and the inner ends of the tooth portions (22) form the inner edges (221).

3. A stator punching according to claim 2, characterized in that the radial width of the circumferential ends of the teeth (22) decreases gradually in a direction away from the arcuate edge (2211).

4. A stator punching according to claim 3, characterized in that the stator teeth (2) are of symmetrical construction.

5. An electric machine, comprising:

a stator core formed by stacking a plurality of stator laminations according to any one of claims 1-4;

and the rotor is positioned on the inner periphery of the stator core.

6. An electric machine according to claim 5, characterized in that the rotor comprises a rotor core on which the magnetic shoes (4) are fitted.

7. An electric machine according to claim 6, characterized in that the number of the magnetic shoes (4) is plural, and that the plurality of magnetic shoes (4) are fitted on the rotor core uniformly in the circumferential direction.

8. A machine according to any one of claims 6-7, characterized in that the magnetic shoe (4) is arc-shaped, the circumferential ends of the outer surface (41) of the magnetic shoe (4) being cut into flat inclined surfaces (42).

9. A machine according to claim 8, characterized in that the Ping Xiemian (42) extends to the circumferential end face of the magnetic shoe (4).