CN216981648U

CN216981648U - Stator assembly and alternating current generator

Info

Publication number: CN216981648U
Application number: CN202220518231.1U
Authority: CN
Inventors: 李宁宁; 李伟明; 赵蕊蕊
Original assignee: Prestolite Electric Weifang Ltd; Prestolite Electric Beijing Ltd
Current assignee: Prestolite Electric Weifang Ltd; Prestolite Electric Beijing Ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-07-15
Anticipated expiration: 2032-03-09

Abstract

The utility model discloses a stator assembly and an alternating current generator, and belongs to the technical field of generators, wherein the stator assembly comprises a stator core and a winding arranged on the stator core, the winding is a rectangular bare copper wire, and high-performance insulating paint is sprayed or rolled and dipped on the inner side, the outer side and the end part of the winding extending out of the stator core; the alternating current generator comprises a shell and a rotor arranged in the shell, and the stator assembly is further arranged in the shell.

Description

Stator assembly and alternating current generator

Technical Field

The utility model belongs to the technical field of generators, and particularly relates to a stator assembly and an alternating-current generator.

Background

When the automobile generator works, the rotor assembly rotates to generate a rotating magnetic field to cut the stator winding, induced electromotive force is induced in the winding, and the induced electromotive force is rectified by the rectifier bridge and regulated by the regulator to supply power to the outside. The stator winding needs to have good insulation performance, and is mainly made of enameled wire in the present situation, wherein the insulation of the stator winding comprises insulation between windings and insulation of the windings to an iron core; the former depends on the specification of an insulating layer of an enameled wire, the specification of spraying insulating paint and the space between the enameled wires, and the latter is mainly determined by the specification of the insulating layer of the enameled wire plus slot insulating paper. The enameled wires include round enameled wires and rectangular enameled wires.

Generally, the slot filling ratio of a circular enameled wire stator is only about 50%, and the ratio of the rotor diameter to the radial dimension of the stator core of this type of alternator is about 3.5, resulting in limited output performance of the motor. Meanwhile, the enameled round copper wire needs to be effectively insulated through an enameled layer of the copper wire, and the manufactured extrusion does not damage the enameled round copper wire in the manufacturing process.

The rectangular enameled wire is regular in appearance, the shape of a wire of the rectangular enameled wire is matched with the shape of a stator iron core groove, the filling factor of the stator iron core groove can be greatly improved by about 80%, and the performance of the whole machine is directly improved. However, in the process of processing the stator assembly, in order to ensure the coil connection of the product design scheme, the enameled layer of the rectangular enameled wire needs to be removed by a chemical method or a mechanical removal method, which is time-consuming and labor-consuming. In addition, the enameled wire consists of a pure copper wire and insulating paint, the manufacturing process comprises the working procedures of paying off, annealing, painting, baking, cooling, taking up and the like, and the process flow is various; meanwhile, the process difficulty is increased along with the rise of the heat-resistant grade of the insulating paint; the complex process of manufacturing the enameled wire by the pure copper wire directly leads to the high price of the enameled wire, and the price of the pure copper wire and the enameled wire is doubled or even higher by taking polyimide insulating paint as an example.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the stator assembly and the alternating current generator have the advantages that the insulating layer removing process of the rectangular enameled wire in the production process is reduced, the cost is reduced compared with the rectangular enameled wire, and the performance of the whole machine is improved compared with the round enameled wire.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

the utility model provides a stator assembly, includes stator core and install in stator core's winding, the winding is the bare copper line of rectangle, the winding stretches out the inside and outside and the tip spraying of stator core part or roll and soak high performance insulating varnish.

Furthermore, insulating slot paper is arranged between adjacent windings and between the windings and the stator core.

Furthermore, the winding is at least provided with two layers, and the insulation slot paper is special-shaped insulation slot paper.

An alternating current generator comprises a machine shell and a rotor arranged in the machine shell, wherein the stator assembly is further arranged in the machine shell.

After the technical scheme is adopted, the utility model has the beneficial effects that:

because the stator assembly comprises the stator core and the winding arranged on the stator core, the winding is a rectangular bare copper wire, and the inner side, the outer side and the end part of the winding extending out of the stator core are sprayed or soaked with the high-performance insulating paint in a rolling way.

Compared with the traditional generator with the circular enameled wire stator assembly, the alternating-current generator can better control the cost of the whole machine, can obtain a larger rotor magnetic field, improves the output power of the whole machine and improves the comprehensive competitiveness of the whole machine.

In conclusion, the stator assembly and the stator assembly solve the technical problem of high cost caused by the fact that the stator assembly uses the enameled wire winding in the prior art, compared with the rectangular enameled wire, the cost is reduced, the insulating layer removing process of the rectangular enameled wire in the production process is reduced, the process procedures are simplified, compared with the round enameled wire, the stator slot fullness rate is greatly improved, the output power of the whole machine is improved, and the comprehensive competitiveness of the whole machine is improved.

Drawings

FIG. 1 is a schematic structural view of a stator assembly of the present invention;

FIG. 2 is a partial cross-sectional view of a stator assembly of the present invention;

FIG. 3 is a partial cross-sectional view of a portion of the windings extending out of the stator core;

in the figure, 1-stator iron core, 2-winding, 3-rectangular bare copper wire, 4-insulating slot paper and 5-high-performance insulating paint.

Detailed Description

The utility model is further illustrated with reference to the following figures and examples.

All directions referred to in the present specification are based on the drawings, and represent relative positional relationships only, and do not represent absolute positional relationships.

The first embodiment is as follows:

as shown in fig. 1, 2 and 3, a stator assembly comprises a stator core 1 and a winding 2 installed on the stator core 1, wherein the winding 2 is a rectangular bare copper wire 3, and after the stator assembly is assembled and welded, the winding 2 extends out of the inner side and the outer side of the stator core 1, and the end part of the winding 2 is sprayed or rolled with a high-performance insulating paint 5, so that the adjacent windings 2 are not in contact with each other except for welding spots, and the insulation between the windings 2 is ensured. Among them, the high-performance insulating paint 5 is preferably 0840 type. By means of matching of the line shape of the copper wire and the groove shape of the mounting groove on the stator core 1, the filling rate of the stator groove can be greatly improved to about 80%.

As shown in fig. 2, insulating slot paper 4 is provided between adjacent windings 2 and between the windings 2 and the stator core 1. The winding 2 sets up to two-layer at least, and for guaranteeing the insulating nature between adjacent winding 2 and between winding 2 and stator core 1, the insulation paper 4 sets up to special-shaped insulation paper, and winding 2 sets up to two-layer in figure 2, and insulation paper 4 is the S type.

According to the stator assembly, the winding of the rectangular bare copper wire is mounted on the stator core, and the high-performance insulating paint is sprayed or rolled and soaked on the inner side, the outer side and the end part of the winding extending out of the stator core, so that the insulation between the windings extending out of the stator core is ensured.

Example two:

an alternator comprises a housing and a rotor mounted in the housing, wherein the stator assembly of the first embodiment is further mounted in the housing. In the daily 14V and 28V vehicle systems, the reliable withstand voltage requirement threshold between conductive parts is low, the highest reliable application voltage is below 60V, the insulativity of the insulating slot paper 4 and the high-performance insulating paint 5 can meet the daily vehicle requirements, the production cost competitiveness of the insulating slot paper is higher than that of enameled wire products, and the production cost competitiveness is more favorable for market development and popularization of the products.

The winding 2 uses the alternator of the rectangular copper wire 3, the ratio of the diameter of the rotor to the radial size of the stator core 1 can reach 4.4, a larger rotor magnetic field can be obtained, and the output power of the whole alternator is improved by 50% compared with the output power of a common round enameled wire product under the same alternator outline.

According to the alternating-current generator, the stator assembly in the first embodiment is used, a larger rotor magnetic field can be obtained, the output power of the whole machine is improved, the cost of the whole machine can be better controlled, and the comprehensive competitiveness of the whole machine is improved.

While specific embodiments of the utility model have been described above, it will be understood by those skilled in the art that the described embodiments are only some, and not all, of the present invention, which is presented by way of example only, and the scope of the utility model is defined by the appended claims. Various changes or modifications to these embodiments may be made by those skilled in the art without departing from the principle and spirit of the utility model, and these changes and modifications all fall within the scope of the utility model.

Claims

1. The stator assembly comprises a stator core and a winding arranged on the stator core, and is characterized in that the winding is a rectangular bare copper wire, and high-performance insulating paint is sprayed or rolled on the inner side, the outer side and the end part of the winding extending out of the stator core part.

2. The stator assembly of claim 1, wherein insulating slot paper is disposed between adjacent windings and between the windings and the stator core.

3. The stator assembly according to claim 2, wherein the windings are arranged in at least two layers, and the insulation slot paper is a profiled insulation slot paper.

4. An alternator comprising a housing and a rotor mounted in said housing, wherein said housing further houses a stator assembly according to any one of claims 1 to 3.