TWM587399U - Motor stator structure - Google Patents

Abstract

This creation is a stator structure of a motor, which includes a stator core, an insulation layer, and a stator winding. The stator core includes a yoke portion and a plurality of stator teeth. The stator teeth are connected to the yoke portion, and a certain sub-slot is defined between each adjacent two stator teeth. The insulating layer is integrally formed on the stator core by injection molding of an insulating material, and the insulating layer is disposed on both ends of the stator core and the inner wall of the stator slot. A stator winding is wound on the stator teeth, and a stator winding is located in the stator slots. Therefore, the assembly method can be simplified and the stability of the assembly can be ensured. The problems of uneven coating of the epoxy resin and environmental pollution can also be solved.

Description

Stator structure of motor

This creation relates to a stator structure of a motor, especially a stator structure applied to a permanent magnet motor.

The insulation between the stator core and the winding of the existing low-pressure compressor is made of insulating paper or coating an insulating layer. The insulation method of the insulation paper is to insert the insulation paper into the slot through the stator iron core by hand or equipment, then manually combine the upper and lower frames, and finally perform the winding operation. The method of coating the insulation layer, after the stator cores are stacked and cleaned, epoxy resin (Epoxy) is applied, and then the winding operation is performed after heating and curing.

However, the use of insulating paper needs to increase the frame parts at both ends of the stator, which not only increases the winding ends to reduce energy efficiency, but also increases the complexity of assembly. Epoxy resin is used for coating and insulation. Because epoxy resin cannot be evenly coated on the surface of the stator core, there will be uneven coating, especially in the right-angle part, which is the most difficult to control due to the thickness, and it is easy to produce insulation. The problem of poor pressure resistance, and epoxy resins generally use epichlorohydrin and phenols or their equivalents as starting materials. Various epoxy resin main agent products of different molecular weights can be obtained, but after scrapping The epoxy resin cannot be degraded. If the waste is burned, a large amount of carcinogens will be generated, which will endanger human health and pollute the environment.

The technical problem to be solved in this creation is to provide a stator structure of the motor for the shortcomings of the existing technology. The insulation material between the stator core and the stator winding is integrally formed by injection molding, which can greatly simplify the assembly method and integrate the two end frames with the The insulation paper is integrated into one, which ensures the stability of the assembly, and can also solve the problems of uneven epoxy coating and environmental pollution.

In order to solve the above technical problem, the technical solution adopted in this creation is to provide a stator structure of a motor, including: a stator core, the stator core including a yoke and a plurality of stator teeth, and the stator teeth are connected to the stator The yoke part, the stator teeth are arranged at intervals along the circumferential direction of the yoke part, the stator teeth are arranged on the inner side of the yoke part, and a certain sub-slot is defined between each adjacent two stator teeth; the insulation layer, The insulating layer is integrally formed on the stator core by injection molding of an insulating material, the insulating layer is disposed on both ends of the stator core and an inner wall of the stator slot; and a stator winding, the stator winding is wound around the stator cores. The stator teeth, and the stator windings are located in the stator slots, and the insulation layer is located between the stator core and the stator windings.

Preferably, an outer wall and a plurality of boots are provided at both ends of the stator core, the two outer walls and the boots are made of insulating material, and the two outer walls are respectively connected to the yoke of the stator core. The two ends of the shoe are respectively connected to the two ends of the stator teeth, and the two outer walls and the boots are located outside the stator winding.

Preferably, one end of the stator core is further provided with a cover, one of the two outer walls is provided with a plurality of first fastening portions, and the cover is provided with a plurality of second fastening portions. The first fastening portions are respectively engaged with the second fastening portions, so that the cover is connected to the outer wall.

Preferably, the thickness of the insulating layer is d and satisfies d ≧ 0.2 mm.

Preferably, the outer diameter of the stator structure is D, the height of the stator structure is H, and the ratio of the outer diameter of the stator structure to the height of the stator structure is a, a = D / h, and satisfies 1.4 ≦ a ≦ 7.1.

The beneficial effect of this creation is that the stator structure of the motor provided in this creation, the insulation material between the stator core and the stator winding is integrally formed by injection molding, which can simplify the assembly process of the frame and the slot paper, and reduce the labor cost. The insulation method can uniformly and surely isolate the contact between the stator winding and the stator core, increase the durability and reliability of the product, and avoid the withstand voltage problems caused by uneven coating of epoxy resin.

Furthermore, this creative insulation material can also use recyclable PBT material to solve the air pollution problem of epoxy resin during production and the environmental pollution problem of waste recycling.

In order to better understand the features and technical contents of this creation, please refer to the following detailed description and drawings about this creation. However, the drawings provided are only for reference and explanation, and are not intended to limit this creation.

The following are specific implementation examples to explain the implementation of the present disclosure. Those skilled in the art can understand the advantages and effects of the present disclosure from the content disclosed in this specification. This creation can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of this creation. In addition, the drawings of this creation are only for simple and schematic illustrations, and are not drawn in actual size, so stated in advance. The following embodiments will further describe the technical content of this creation in detail, but the disclosed content is not intended to limit the scope of protection of this creation.

[First embodiment]

The present invention provides a stator structure of a motor, which can be applied to a low-voltage or high-voltage compressor motor without limitation. Please refer to FIGS. 1 to 6. In this embodiment, a thin frame design is used to reduce the height of the copper wire end and the amount of frame material. This creation is directly injection molding the stator core, and at the same time, the ends of the stator core and the interior of each stator slot are insulated, and then the finished product after the injection is wound. The stator structure of the motor includes the stator core 1 and Insulation layer 2.

The stator core 1 includes a yoke portion 11 and a plurality of stator teeth 12. The yoke portion 11 is a circular ring. The stator teeth 12 are connected to the yoke portion 11. The stator teeth 12 are along the circumference of the yoke portion 11. The yoke portions 11 of the stator core 1 may be arranged along the circumferential direction of the stator core 1. The stator teeth 12 may be provided inside the yoke portion 11, and the stator teeth 12 may extend in the radial direction of the stator core 1. . A certain sub-slot 13 is defined between every two adjacent stator teeth 12. In this embodiment, the stator slots 13 are used to compress a motor stator core. The number of the stator slots 13 is at least four.

The stator teeth 12 may be T-shaped cylinders, that is, each stator tooth 12 may include a tooth body 121 and a tooth shoe 122. One end of the tooth body 121 is connected to the yoke portion 11, and the tooth shoe 122 is connected to the tooth body. At the other end of 121, the width of the toothed shoe 122 is greater than the width of the toothed body 121. The toothed shoe 122 protrudes from both sides of the toothed body 121 and can be used to stop and locate the stator winding. Further, the stator structure further includes a stator winding 3 (as shown in FIG. 6). After the insulation layer 2 is provided on the stator core 1, the stator winding 3 may be wound on the stator teeth 12, and the stator winding 3 is located in the stator slots 13.

The insulating layer 2 is provided on both ends of the stator core 1 (the upper and lower ends shown in FIG. 1) and the inner wall of the stator slot 13. The insulating layer 2 is integrally formed on the stator core 1 by injection molding of an insulating material. This greatly simplifies assembly. The material of the insulating layer 2 is not limited. Polybutylene terephthalate (PBT) is preferred, that is, the insulating layer 2 may be a polybutylene terephthalate layer. The two ends of the stator core 1 corresponding to the stator winding 3 are provided with an insulating layer 2, and the inner wall of the stator slot 13 is also provided with an insulating layer 2, so as to improve the distance between the stator core 1 and the stator winding 3. Insulation effect.

Specifically, the insulating layer 2 is provided at least on the surfaces of the tooth body 121, the tooth boots 122, and the surface of the yoke 11 of the stator teeth 12 adjacent to the stator winding 3, so that the insulating layer 2 can be located on the stator core 1 and the stator. Between the windings 3 to play the role of insulation. The insulating layer 2 may be further disposed on a portion of the stator core 1 near the stator winding 3.

Preferably, the thickness of the insulation layer 2 is d and satisfies d ≧ 0.2mm, thereby ensuring the insulation effect between the stator core 1 and the stator winding 3, and improving the utilization rate of the stator slot 13, and facilitating Winding of the stator winding 3. Preferably, the outer diameter of the stator structure is D, the height of the stator structure is H, and the ratio of the outer diameter D of the stator structure to the height H of the stator structure is a, that is, a = D / h, which satisfies 1.4 ≦ a ≦ 7.1. Under this condition, the insulation withstand voltage and leakage current between the stator core 1 and the stator winding 3 can be effectively ensured, and good injection quality can be achieved.

[Second embodiment]

Please refer to FIG. 7. In this embodiment, the stator structure of the motor can be applied to a motor with a large number of winding turns or a high voltage motor. Further, an outer wall 4 and a plurality of boots are provided at both ends of the stator core 1. The parts 5, the two outer walls 4 and the boot parts 5 can be integrally formed by injection molding on the stator core 1 with an insulating material, and the two outer walls 4 are respectively connected to both ends of the yoke part 11 of the stator core 1. The shoe parts 5 are respectively connected to two ends of the stator teeth 12. The two outer walls 4 and the shoe parts 5 can be located outside the stator winding 3 (see FIG. 6) to protect the stator winding 3.

[Third embodiment]

Please refer to FIG. 8 and FIG. 9. In this embodiment, the stator structure of the motor is further provided with an outer wall 4 and a plurality of shoe parts 5 at both ends of the stator core 1, two outer walls 4 and the boots. The part 5 can be made of insulating material. The two outer walls 4 are respectively connected to both ends of the yoke part 11 of the stator core 1. The shoe parts 5 are respectively connected to both ends of the stator teeth 12. A cover 6 is also provided at one end of the stator core 1. The cover 6 can be made of insulating material. One of the two outer walls 4 is provided with a plurality of first fastening portions 41. Second fastening portions 61, the first fastening portions 41 and the second fastening portions 61 are respectively fastened to each other, so that the cover 6 is connected to the outer wall 4, the two outer walls 4, the boots 5 and the cover 6 can be located outside the stator winding 3 (see FIG. 6) to protect the stator winding 3.

[Beneficial effects of this creation]

The beneficial effect of this creation is that, in the stator structure of this creation motor, the insulation material between the stator core and the stator winding is integrally formed by injection molding, which can simplify the assembly process of the frame and the slot paper, reduce labor costs, and this insulation method can The stator winding is evenly and surely isolated from contact with the stator core, which increases the durability and reliability of the product, and can avoid the problem of voltage resistance caused by uneven coating of epoxy resin.

Furthermore, this creative insulation material can also use recyclable PBT material to solve the air pollution problem of epoxy resin during production and the environmental pollution problem of waste recycling.

The content disclosed above is only the preferred and feasible embodiment of this creation, and therefore does not limit the scope of the patent application for this creation. Therefore, any equivalent technical changes made using this creation specification and diagram content are included in this creation application Within the scope of the patent.

1‧‧‧ stator core
11‧‧‧Yoke
12‧‧‧ stator teeth
121‧‧‧tooth body
122‧‧‧Tooth Boots
13‧‧‧Stator slot
2‧‧‧ Insulation
3‧‧‧ Stator winding
4‧‧‧ outer wall
41‧‧‧First buckle
5‧‧‧boot
6‧‧‧ cap
61‧‧‧Second fastening section
d‧‧‧thickness
D‧‧‧ outer diameter
H‧‧‧ height

FIG. 1 is a perspective view of a stator structure of a motor according to a first embodiment of the present invention.

FIG. 2 is a top view of a stator structure of a motor according to a first embodiment of the present invention.

Fig. 3 is a sectional view taken along the line III-III of Fig. 1.

FIG. 4 is a detailed view of part IV in FIG. 3.

5 is a partial cross-sectional view of a stator structure of a motor according to a first embodiment of the present invention.

FIG. 6 is a perspective view of a stator structure provided with a stator winding of the motor according to the first embodiment of the present invention.

FIG. 7 is a perspective view of a stator structure of a motor according to a second embodiment of the present invention.

FIG. 8 is an exploded perspective view of a stator structure of a motor according to a third embodiment of the present invention.

FIG. 9 is a perspective assembled view of a stator structure of a motor according to a third embodiment of the present invention.

Claims (8)

A stator structure of a motor includes:
A stator core, which includes a yoke portion and a plurality of stator teeth, the stator teeth are connected to the yoke portion, the stator teeth are arranged at intervals along the circumferential direction of the yoke portion, and the stator teeth are disposed On the inner side of the yoke, a certain sub-slot is defined between each adjacent two stator teeth;
An insulating layer integrally formed on the stator core by injection molding of an insulating material, the insulating layer being disposed on both ends of the stator core and an inner wall of the stator slot; and a stator winding, the stator winding is wound around On the stator teeth, the stator winding is located in the stator slots, and the insulation layer is located between the stator core and the stator winding. The stator structure of the motor according to item 1 of the scope of patent application, wherein each stator tooth includes a tooth body and a tooth shoe, one end of the tooth body is connected to the yoke part, and the tooth shoe is connected to the other of the tooth body. At one end, the width of the tooth boots is greater than the width of the tooth body, and the tooth boots protrude from both sides of the tooth body. The stator structure of the motor according to item 2 of the scope of patent application, wherein the insulation layer is provided at least on the tooth body of the stator teeth adjacent to the stator winding, the surface of the tooth boots, and the surface of the yoke portion. The stator structure of the motor according to item 1 of the patent application scope, wherein the insulating layer is a polybutylene terephthalate layer. The stator structure of the motor according to item 1 of the scope of patent application, wherein two ends of the stator core are provided with an outer wall and a plurality of shoe parts, and the two outer walls and the shoe parts are made of an insulating material. Two external walls are respectively connected to both ends of the yoke part of the stator core, the boots are respectively connected to both ends of the stator teeth, and the two external walls and the boots are located outside the stator winding. The stator structure of the motor according to item 5 of the patent application scope, wherein one end of the stator core is further provided with a cover, one of the two outer walls is provided with a plurality of first fastening portions, and the cover is provided with There are a plurality of second fastening portions, and the first fastening portions and the second fastening portions are respectively fastened with each other, so that the cover is connected to the outer wall. The stator structure of the motor according to item 1 of the scope of patent application, wherein the thickness of the insulation layer is d and satisfies d ≧ 0.2 mm. The stator structure of the motor according to item 1 of the patent application scope, wherein the outer diameter of the stator structure is D, the height of the stator structure is H, and the ratio of the outer diameter of the stator structure to the height of the stator structure is a, a = D / h, and satisfies 1.4 ≦ a ≦ 7.1.