Stator and electric machine

Abstract

The utility model discloses a stator and motor belongs to motor field, including main part, the main part is hollow cylindrical structure, the main part includes a plurality of tooth parts, a plurality of tooth parts are along the circumferential direction and set, form the insulating groove between two adjacent tooth parts, the insulating groove forms the opening on the inside diameter of main part, the insulating groove and opening all along the main part height direction extension, the stator still includes a plurality of insulating layers, every insulating layer injection molding in an insulating groove and from insulating groove bottom extension insulating groove top, the insulating layer is made of liquid silica gel, the insulating layer cladding insulating groove inner wall and forms the insulating strip at the opening, the insulating strip fills the opening and the end face of insulating strip is located on the inside diameter of main part.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to stators and motors including stators. Background Technology

[0002] The motor stator mainly consists of stator windings and a stator core, and insulation is required between the core and the enameled wire. A common insulation method is to create insulating slots on the stator and place insulating paper in these slots to enhance the insulation between the stator windings and the stator core. However, this structure requires inserting multiple sheets of insulating paper into multiple insulating slots, making the process cumbersome.

[0003] Existing technologies have introduced structures that use injection molding to form an insulating layer in an insulating groove. However, the insulating material used is PBT, which results in a thick insulating layer and a low insulating layer height, making it unsuitable for stators with large heights. Furthermore, the insulating layer creates an opening in the inner diameter of the stator, leading to weak insulation performance. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this utility model is to provide a stator with a small insulation layer thickness and strong insulation performance.

[0005] In order to overcome the shortcomings of the existing technology, one of the objectives of this utility model is to provide a motor with a small insulation layer thickness and strong insulation performance.

[0006] One of the objectives of this utility model is achieved through the following technical solution:

[0007] A stator includes a body having a hollow cylindrical structure. The body includes multiple teeth arranged circumferentially, with an insulating groove formed between adjacent teeth. The insulating groove forms an opening on the inner diameter of the body, and both the insulating groove and the opening extend along the height of the body. The stator also includes multiple insulating layers, each of which is injection molded into an insulating groove and extends from the bottom to the top of the groove. The insulating layer is made of liquid silicone and covers the inner wall of the insulating groove, forming an insulating strip at the opening. The insulating strip fills the opening, and the end face of the insulating strip is located on the inner diameter of the body.

[0008] Furthermore, the insulating layer includes a first insulating surface and two second insulating surfaces, the two second insulating surfaces being connected to both sides of the first insulating surface respectively, the two second insulating surfaces being disposed opposite to each other, and the thickness of the first insulating surface and the two second insulating surfaces being 0.2mm-0.25mm.

[0009] Furthermore, the insulating layer also includes a third insulating surface, which is disposed opposite to the first insulating surface. The third insulating surface is connected to two second insulating surfaces on both sides, and the insulating strip extends from the side of the third insulating surface away from the insulating groove.

[0010] Furthermore, the first insulating surface, the two second insulating surfaces, and the third insulating surface together form a winding groove, which is rectangular.

[0011] Furthermore, the thickness of the insulating layer is the same along the height direction of the main body.

[0012] Furthermore, the main body includes multiple stacked plates and two end ring cores, the multiple stacked plates are stacked and fixed to each other, and the two end ring cores are respectively located at both ends of the multiple stacked plates and fixedly connected to the stacked plates.

[0013] Furthermore, the end face of the insulating layer is flush with the surface of the end ring core.

[0014] Furthermore, the structure of the end ring core is the same as the structure of the laminate.

[0015] Furthermore, the height of the stator is greater than 100mm.

[0016] The second objective of this utility model is achieved by the following technical solution:

[0017] An electric motor, wherein the electric motor includes any of the stators described above.

[0018] Compared to existing technologies, the stator of this utility model also includes multiple insulating layers. Each insulating layer is injection molded into an insulating groove and extends from the bottom to the top of the groove. The insulating layer is made of liquid silicone. The insulating layer covers the inner wall of the insulating groove and forms an insulating strip at the opening. The insulating strip fills the opening and its end face is located on the inner diameter of the main body. Through the above design, insulation is achieved using insulating layers, eliminating the need for inserting insulating paper. Multiple insulating layers are formed in one injection molding process, and the insulating layers increase the structural strength of the stator. The liquid silicone forming the insulating layer allows for a thickness of 0.2mm-0.25mm, increasing the volume of the winding groove. Furthermore, the liquid silicone forming the insulating layer eliminates the need for demolding, ensuring that the thickness of the insulating layer is consistent at both ends. The liquid silicone forming the insulating layer has high thermal conductivity, facilitating heat dissipation. Attached Figure Description

[0019] Figure 1 This is a perspective view of the stator of this utility model;

[0020] Figure 2 for Figure 1 Enlarged view of stator A;

[0021] Figure 3 for Figure 1 A three-dimensional view of the main body of the stator;

[0022] Figure 4 for Figure 3 An enlarged view of point B on the main body;

[0023] Figure 5 for Figure 1 A three-dimensional view of the insulation layer of the stator.

[0024] In the figure: 10, main body; 11, laminated plate; 12, end ring core; 13, toothed part; 14, insulating groove; 140, inner wall; 141, side wall; 142, end wall; 15, opening; 20, insulating layer; 21, first insulating surface; 22, second insulating surface; 23, third insulating surface; 24, insulating strip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or it can be fixed through another intermediate component. When a component is said to be "connected to" another component, it can be directly connected to the other component or it may be fixed through another intermediate component. When a component is said to be "set on" another component, it can be set directly on the other component or it may be set through another intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please see Figures 1 to 5 The stator of this utility model is a motor component. The stator includes a main body 10 and multiple insulating layers 20 integrally formed in insulating grooves 14. The insulating layers 20 are used for insulation and form winding grooves.

[0029] The main body 10 includes multiple stacked plates 11 and end ring cores 12. The multiple stacked plates 11 are stacked along the height direction and fixed to each other. Specifically, the multiple stacked plates 11 are fixed by any one of adhesive bonding, welding, or riveting. The end ring cores 12 are located at both ends of the multiple stacked plates 11 and are fixedly connected to the stacked plates 11. In this embodiment, the end ring cores 12 and the multiple stacked plates 11 are fixed by welding, forming a weld bead along the height direction on the outer circle of the main body 10.

[0030] The laminate 11 and the end ring core 12 have the same structure, forming multiple teeth 13 in the main body 10. These teeth 13 are evenly arranged circumferentially, and an insulating groove 14 is formed between adjacent teeth 13. The insulating groove 14 extends along the height direction. Specifically, the insulating groove 14 includes an inner wall 140, a side wall 141, and an end wall 142. The inner wall 140 is the end of the insulating groove 14 near the outer periphery, and the side wall 141 is the side surface of the teeth 13. There are two side walls 141, which are arranged opposite each other and parallel to each other. Since the teeth 13 are T-shaped, two end walls 142 are formed near the inner diameter of the stator in the insulating groove 14. Each end wall 142 extends from the end of the side wall 141, and an opening 15 is formed between the two end walls 142, extending along the height direction.

[0031] The insulating layer 20 is integrally formed into the insulating groove 14 by injection molding. The insulating layer 20 covers the inner wall of the insulating groove 14 and fills the opening 15. Specifically, the insulating layer 20 is made of liquid silicone. Using liquid silicone to make the insulating layer 20 can reduce the thickness of the insulating layer 20 and make the insulating layer 20 suitable for stators with larger heights. In this embodiment, the liquid silicone is a thermosetting epoxy resin. Specifically, the insulating layer 20 can be used for stators with a height greater than 100mm. The insulating layer 20 includes a first insulating surface 21, a second insulating surface 22, a third insulating surface 23, and an insulating strip 24. The first insulating surface 21, the second insulating surface 22, the third insulating surface 23, and the insulating strip 24 are integrally formed. The first insulating surface 21 covers the inner wall 140, there are two second insulating surfaces 22, the two second insulating surfaces 22 cover the two side walls 141, the third insulating surface 23 covers the two end walls 142, and the insulating strip 24 fills the opening 15. The end face of the insulating strip 24 is flush with the inner wall of the stator, making the inner wall of the stator smooth. Specifically, the thickness of the first insulating surface 21 and the two second insulating surfaces 22 is 0.2mm-0.25mm. The first insulating surface 21, the two second insulating surfaces 22, and the third insulating surface 23 together form the winding groove. Because it is made of liquid silicone, no demolding is required, so the thickness of the upper and lower ends of the insulating layer 20 is the same, which is beneficial to improving the performance of the stator. Furthermore, the thermal conductivity of the insulating layer 20 to the stator is improved from 0.144W / mk to 2.0W / mk. The insulation CTI value of the insulating layer 20 to the stator is improved from 175V to 2000V+.

[0032] The stator of this invention uses an integrally molded insulating layer 20 to cover the insulating groove 14 for insulation, eliminating the need for inserting insulating paper. Multiple insulating layers 20 are formed in one injection molding process, and the insulating layer 20 increases the structural strength of the stator. Liquid silicone forms the insulating layer 20, allowing the thickness of the insulating layer 20 to be 0.2mm-0.25mm, increasing the volume of the winding groove. Furthermore, the liquid silicone forming of the insulating layer 20 eliminates the need for demolding, ensuring that the thickness of the insulating layer 20 is consistent at both ends. The insulating layer 20 formed by liquid silicone has high thermal conductivity, facilitating heat dissipation.

[0033] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model. These are all equivalent modifications and improvements made to the above embodiments based on the essential technology of this utility model, and all of these fall within the protection scope of this utility model.

Claims

1. A stator, comprising a body having a hollow cylindrical structure, the body including a plurality of teeth arranged along a circumferential direction, an insulating groove forming between adjacent teeth, the insulating groove forming an opening on the inner diameter of the body, the insulating groove and the opening both extending along the height direction of the body, characterized in that: The stator also includes multiple insulating layers, each of which is injection molded into an insulating groove and extends from the bottom to the top of the insulating groove. The insulating layer is made of liquid silicone and covers the inner wall of the insulating groove, forming an insulating strip at the opening. The insulating strip fills the opening and the end face of the insulating strip is located on the inner diameter of the body.

2. The stator according to claim 1, characterized in that: The insulating layer includes a first insulating surface and two second insulating surfaces, which are respectively connected to both sides of the first insulating surface and are disposed opposite to each other. The thickness of the first insulating surface and the two second insulating surfaces is 0.2mm-0.25mm.

3. The stator according to claim 2, characterized in that: The insulating layer further includes a third insulating surface, which is disposed opposite to the first insulating surface. The third insulating surface is connected to two second insulating surfaces on both sides, and the insulating strip extends from the side of the third insulating surface away from the insulating groove.

4. The stator according to claim 3, characterized in that: The first insulating surface, the two second insulating surfaces, and the third insulating surface together form a winding groove, which is rectangular.

5. The stator according to claim 1, characterized in that: The thickness of the insulating layer is the same along the height direction of the main body.

6. The stator according to claim 1, characterized in that: The main body includes multiple stacked plates and two end ring cores. The multiple stacked plates are stacked and fixed to each other, and the two end ring cores are located at both ends of the multiple stacked plates and are fixedly connected to the stacked plates.

7. The stator according to claim 6, characterized in that: The end face of the insulating layer is flush with the surface of the end ring core.

8. The stator according to claim 6, characterized in that: The structure of the end ring core is the same as the structure of the laminate.

9. The stator according to claim 1, characterized in that: The height of the stator is greater than 100mm.

10. An electric motor, characterized in that: The motor includes the stator as described in any one of claims 1-9.

Images