Stator sheet, stator assembly and motor

Abstract

The utility model relates to a stator sheet, a stator assembly and a motor. The stator sheet (100) comprises a sheet body (101) with a circular inner hole (102); a plurality of tooth parts (103) are uniformly distributed on one side, far away from the direction of the inner hole (102), of the sheet body (101) in a surrounding manner, and the central axis of each tooth part (103) is coaxial with the diameter of the inner hole (102); the top end of the tooth part (103) is provided with blocking parts (104) extending towards the two sides respectively, and the outer contour of each blocking part (104) is located on an arc concentric with the inner hole (102). By optimizing the structures of the stator sheet and the stator assembly, the purpose of improving the performance of the motor is achieved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a stator lamination, a stator assembly, and a motor. Background Technology

[0002] In an internal rotor permanent magnet motor, the motor consists of a stator assembly 200, a rotor assembly 400, a shaft assembly 500, and other components, such as... Figure 3 As shown, in the prior art, the stator assembly 200 consists of multiple internal toothed iron cores 301, winding coils 202 on the iron cores, and clamps 300 fixed around the multiple internal toothed iron cores 301. After the multiple internal toothed iron cores 301 are assembled, they form stator slots 303 spaces between the stator teeth 302. Due to the interaction between the permanent magnets on the rotor assembly 400 and the multiple internal toothed iron cores, when the rotor assembly 400 rotates along the axis within the stator assembly 200, the permanent magnets meet or separate from the stator teeth 302. The air gap magnetic flux between the corresponding positions of the stator teeth 302 and the stator slots 303 and the outer surface of the rotor is uneven. Near the stator slots 303, the magnetic field strength changes drastically due to the different permeability of the iron core and the air. This causes the tangential component of the interaction force between the permanent magnets and the stator teeth 302 to cause corresponding torque changes, which will cause the motor to vibrate and generate noise, resulting in speed fluctuations and affecting the motor performance.

[0003] To reduce the adverse effects of cogging torque fluctuations, this cogging-free stator assembly was developed. Utility Model Content

[0004] The purpose of this invention is to propose a stator lamination, a stator assembly, and a motor, thereby improving the performance of the motor by optimizing the structure of the stator lamination and the stator assembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] On one hand, the present invention provides a stator lamination, comprising a lamination body having a circular inner hole; a plurality of teeth are evenly distributed around one side of the lamination body away from the direction of the inner hole, the central axis of the teeth being coaxial with the diameter of the inner hole; the top of the teeth is provided with a stop extending to both sides, and the outer contour of each stop is on an arc concentric with the inner hole.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: adjacent teeth are connected by an arc-shaped groove.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the contours on both sides of the tooth are straight lines that are parallel to each other.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the side of the stop closer to the tooth is perpendicular to the central axis of the tooth.

[0010] On the other hand, the present invention provides a stator assembly including the stator laminations described above.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: it further includes a stator yoke and a winding coil, wherein the stator yoke is cylindrical, a plurality of stator laminations are stacked on each other and embedded in the stator yoke, and the winding coil is wound on a winding core formed by a plurality of teeth stacked on each other.

[0012] On the other hand, the present invention also provides an electric motor, including the stator assembly described above.

[0013] In order to improve the performance of the motor, this utility model has the following beneficial effects:

[0014] On the one hand, the inner side of the stator lamination of this utility model is a sealing structure that can form a fit with the rotor assembly (an inner hole without an open slot), and the outer side can be fixedly embedded into the stator yoke during installation to form a tight closed structure. The stator assembly using this stator lamination can effectively avoid the generation of uneven air gap magnetic flux between the stator teeth and the stator slots.

[0015] On the other hand, the stator assembly of this invention has a closed structure on the side near the rotor assembly, and is integrated without tooth space. Even if there is an interaction between the permanent magnet on the rotor assembly and the wound iron core of this stator assembly, the air gap magnetic flux between the permanent magnet and the wound iron core will not increase or decrease suddenly, thereby reducing the drastic change in torque, reducing the vibration and noise of the motor and the speed fluctuation, and improving the working performance of the motor.

[0016] That is, the working performance of the motor of this utility model is improved.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stator lamination of this utility model;

[0019] Figure 2 This is a schematic diagram of the motor of the present invention, which includes stator laminations and a stator assembly;

[0020] Figure 3 This is a schematic diagram of a motor, which is the background technology of this utility model. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0022] See Figure 1-3 This utility model discloses a stator lamination 100, a stator assembly 200, and a motor. By optimizing the structure of the stator lamination 100 and the stator assembly 200, the performance of the motor is improved.

[0023] On the one hand, in the embodiments of this disclosure, such as Figure 1 As shown, the stator plate 100 includes a plate body 101 with a circular inner hole 102; a plurality of teeth 103 are evenly distributed around one side of the plate body 101 away from the direction of the inner hole 102, and the central axis of the teeth 103 is coaxial with the diameter of the inner hole 102; the top of the teeth 103 is provided with a stop 104 extending to both sides, and the outer contour of each stop 104 is on an arc concentric with the inner hole 102.

[0024] The inner side of the stator lamination 100 of the utility model is capable of connecting with the rotor assembly 400 (e.g., Figure 2 This forms a tight-fitting sealing structure (without an open slot in the inner hole 102), and the outer side can be fixedly embedded into the stator yoke 201 during installation to form a tight seal. The stator assembly 200 using this stator lamination 100 can effectively avoid the stator teeth 302 and stator slots 303 (such as...). Figure 3 The generation of non-uniform air gap magnetic flux between them.

[0025] Furthermore, adjacent teeth 103 are connected by an arc-shaped groove 105 to ensure reliable connection between adjacent teeth 103 while fulfilling functional requirements. Meanwhile, to facilitate the winding of the coil 202 and ensure coil excitation effect, the contours on both sides of the teeth 103 are parallel straight lines. The side of the stop 104 closest to the teeth 103 is perpendicular to the central axis of the teeth 103.

[0026] On the other hand, in the embodiments of this disclosure, such as Figure 2 As shown, this stator assembly 200 includes the stator laminations 100 described above. It further includes a stator yoke 201 and a winding coil 202. The stator yoke 201 is cylindrical, with several stator laminations 100 stacked and embedded in the stator yoke 201. The winding coil 202 is wound on a winding core 203 formed by several stacked teeth 103. The stacked stator laminations 100 can be riveted or bonded together and then tightly fitted into the stator yoke 201, with the end planes of the stator laminations 100 and the stator yoke 201 respectively flush.

[0027] The stator assembly 200 of this invention has a closed structure on the side near the rotor assembly 400, forming a single unit without any tooth space. Even if there is an interaction between the permanent magnet on the rotor assembly 400 and the wound iron core 203 of the stator assembly 200, the air gap magnetic flux between the permanent magnet and the wound iron core 203 will not increase or decrease suddenly, thereby reducing drastic changes in torque, reducing motor vibration and noise as well as speed fluctuations, and improving the working performance of the motor.

[0028] On the other hand, in the embodiments of this disclosure, such as Figure 2 As shown, based on the above technology, the motor of this utility model includes the stator assembly 200 mentioned above, and a rotor assembly 400 with a shaft assembly 500 is disposed inside the stator assembly 200. There is an interaction between the permanent magnet on the rotor assembly 400 and the wound iron core 203 of the stator assembly 200. The air gap magnetic flux between the permanent magnet and the wound iron core 203 will not experience sudden increases or decreases, thereby reducing drastic torque changes, reducing motor vibration and noise, and speed fluctuations, and improving the motor's operating performance.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stator lamination (100), characterized in that, Includes a sheet body (101) having a circular inner hole (102); A plurality of teeth (103) are evenly distributed around the side of the plate (101) away from the inner hole (102), and the central axis of the teeth (103) is coaxial with the diameter of the inner hole (102). The top of the tooth (103) is provided with a stop (104) extending to both sides, and the outer contour of each stop (104) is on an arc concentric with the inner hole (102).

2. The stator lamination (100) according to claim 1, characterized in that, Adjacent teeth (103) are connected by an arc-shaped groove (105).

3. The stator lamination (100) according to claim 1, characterized in that, The contours on both sides of the tooth (103) are straight lines that are parallel to each other.

4. The stator lamination (100) according to claim 1 or 3, characterized in that, The side of the stop (104) near the tooth (103) is perpendicular to the central axis of the tooth (103).

5. A stator assembly (200), characterized in that, Includes the stator lamination (100) as described in any one of claims 1-4.

6. The stator assembly (200) according to claim 5, characterized in that, It also includes a stator yoke (201) and a winding coil (202). The stator yoke (201) is cylindrical, and a plurality of stator laminations (100) are stacked on each other and embedded in the stator yoke (201). The winding coil (202) is wound on a winding core (203) formed by a plurality of teeth (103) stacked on each other.

7. An electric motor, characterized in that, Includes the stator assembly (200) as described in claim 5 or 6.

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