CN112994369A

CN112994369A - Method for adjusting end gap of motor coil

Info

Publication number: CN112994369A
Application number: CN202011634756.3A
Authority: CN
Inventors: 高丽君; 车三宏; 邵平安; 于亮; 李华; 周迪生; 房明; 万兴锦; 杨晔
Original assignee: Jiangsu CRRC Motor Co Ltd
Current assignee: Jiangsu CRRC Motor Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-06-18
Also published as: WO2022142630A1

Abstract

The invention provides a method for adjusting the end gap of a motor coil, wherein an inner lead joint and an outer lead joint are respectively positioned at the upper side and the lower side of the end of the coil; when the thickness of the inner lead joint is larger than the width of the gap on the upper side of the coil end, the vertex of the coil end is adjusted to shift towards the direction of the outer lead joint on the lower side until the width of the gap on the upper side of the coil end is larger than the thickness of the inner lead joint. The invention has the advantages of increasing the end gap of the inner lead joint, ingenious design, convenient implementation, improving the production efficiency and the like.

Description

Method for adjusting end gap of motor coil

Technical Field

The invention relates to the field of generator manufacturing, in particular to a method for adjusting a gap of an end part of a motor coil.

Background

The coil design and forming process of the megawatt motor is a core technology for manufacturing the motor, and the coil inserting process is also a key process for manufacturing the generator. One of the characteristics of the direct-drive permanent magnet motor is that the number of slots is large, the megawatt motor has higher power, the current of the motor is increased along with the power, and the position gap of the leading joint at the end part of the coil is smaller and smaller. On one hand, the lead wire is scratched in an insulation manner in the coil wire inserting process due to the fact that the gap between the end parts of the coil is reduced, and the service life of the generator is directly influenced by the insulation of the coil. On the other hand, the gap is reduced to lead the joint to be tightly attached to the end part, the end part of the whole circle of stator coil is tightly attached together, and the joint cannot be bent to be subjected to head combining operation. The traditional treatment method is to increase the length of the end part of the coil, but the solution increases the axial length of the generator, and simultaneously increases the copper consumption of the coil, which is not beneficial to the requirements of energy conservation and efficiency improvement.

Therefore, there is a need to provide a new solution.

Disclosure of Invention

In order to solve the technical problems in the prior art, the invention discloses a method for adjusting the end gap of a motor coil, which comprises the following specific technical scheme:

the invention provides a method for adjusting the gap of the coil end of a motor, wherein the vertex of the coil end is positioned in the middle of the coil end, the coil end is divided into an upper side and a lower side along the horizontal plane where the vertex of the coil end is positioned, an inner lead connector and an outer lead connector are respectively positioned on the upper side and the lower side of the coil end, the outer lead connector extends out from the outer side of the coil end,

when the thickness of the inner lead joint is smaller than the width of the gap on the upper side of the coil end, the inner lead joint extends out of the gap on the upper side of the coil end;

when the thickness of the inner lead joint is larger than the width of the gap on the upper side of the coil end, the vertex of the coil end is adjusted to deviate towards the direction of the outer lead joint on the lower side until the width of the gap on the upper side of the coil end is larger than the thickness of the inner lead joint.

Further, the cross section of the inner lead connector is rectangular, the inner lead connector comprises a width and a thickness, the width is larger than the thickness, and when the width of the gap on the upper side of the coil end is larger than the width of the inner lead connector, the inner lead connector extends out in the width direction of the inner lead connector; when the width of the gap on the upper side of the coil end is smaller than the width of the inner lead joint and larger than the thickness of the inner lead joint, the inner lead joint extends out in the thickness direction.

Further, when the apex of the coil end is located at the middle position of the coil end, the length of the side from the apex of the coil end to the upper side of the coil end is a, when the thickness of the inner lead tab is greater than the width of the gap on the upper side of the coil end, the difference between the thickness of the inner lead tab and the width of the gap on the upper side of the coil end is b, the apex of the coil end is moved to the lower side, the change from the apex of the coil end to the upper side of the coil end is L, and the L is a +5b, the inner lead tab may protrude from the gap on the upper side of the coil.

The invention has the following beneficial effects:

1. the method for adjusting the end gap of the motor coil provided by the invention has the advantages that the top point of the end of the coil deviates towards the external leading joint, the end gap at the external leading joint is reduced, the end gap at the internal leading joint is increased, and the internal leading joint can conveniently extend out of the end gap.

2. The method for adjusting the end gap of the motor coil is ingenious in design and convenient to implement, and improves the production efficiency.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The following described embodiments are illustrative and are intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships only to facilitate description of the present invention and to simplify description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The invention provides a method for adjusting the gap of the coil end of a motor, wherein the vertex of the coil end is positioned in the middle of the coil end, the coil end is divided into an upper side and a lower side along the horizontal plane where the vertex of the coil end is positioned, an inner lead joint and an outer lead joint are respectively positioned on the upper side and the lower side of the coil end, and the outer lead joint extends out of the outer side of the coil end. When the thickness of the inner lead tab is smaller than the width of the gap on the upper side of the coil end, the inner lead tab protrudes from the gap on the upper side of the coil end; when the thickness of the inner lead joint is larger than the width of the gap on the upper side of the coil end, the vertex of the coil end is adjusted to deviate towards the direction of the outer lead joint on the lower side until the width of the gap on the upper side of the coil end is larger than the thickness of the inner lead joint.

The section of the inner guide joint is rectangular, the inner guide joint comprises a width and a thickness, the width is larger than the thickness, and when the width of the gap on the upper side of the coil end is larger than the width of the inner guide joint, the inner guide joint extends out in the width direction of the inner guide joint; when the width of the gap on the upper side of the coil end is smaller than the width of the inner lead tab and larger than the thickness of the inner lead tab, the inner lead tab protrudes in the thickness direction thereof.

In one embodiment, when the vertex of the coil end is located at the middle position of the coil end, the length of the side from the vertex of the coil end to the upper side of the coil end is a, when the thickness of the inner lead tab is greater than the width of the gap on the upper side of the coil end, the difference between the thickness of the inner lead tab and the width of the gap on the upper side of the coil end is b, the vertex of the coil end is moved to the lower side, the change from the vertex of the coil end to the upper side of the coil end is L, and the L is a +5b, the inner lead tab may protrude from the gap on the upper.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

While embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications and variations may be made therein by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A method of adjusting the gap between the ends of a coil of an electrical machine, characterized in that the apex of the coil end is located in the middle of the coil end, dividing the coil end into an upper side and a lower side along the horizontal plane of the apex of the coil end, an inner lead tab and an outer lead tab are located on the upper side and the lower side of the coil end, respectively, said outer lead tab protruding from the outer side of the coil end,

when the thickness of the inner lead tab is smaller than the width of the gap on the upper side of the coil end, the inner lead tab protrudes from the gap on the upper side of the coil end;

when the thickness of the inner lead joint is larger than the width of the gap on the upper side of the coil end, the vertex of the coil end is adjusted to shift towards the direction of the outer lead joint on the lower side until the width of the gap on the upper side of the coil end is larger than the thickness of the inner lead joint.

2. The method of adjusting a coil end gap of an electric motor of claim 1, wherein the cross-section of the inner lead tab is rectangular, the inner lead tab includes a width and a thickness, and the width is greater than the thickness, and the inner lead tab protrudes in a width direction thereof when the width of the gap on the coil end is greater than the width of the inner lead tab; when the width of the gap on the upper side of the coil end is smaller than the width of the inner lead tab and larger than the thickness of the inner lead tab, the inner lead tab protrudes in the thickness direction thereof.

3. The method of adjusting a coil end gap of an electric motor according to claim 1, wherein a length of a side from a coil end vertex to an upper side of the coil end is a when the coil end vertex is located at a middle position of the coil end, a difference between a thickness of the inner lead tab and a width of the gap at the upper side of the coil end is b when the inner lead tab has a thickness greater than the width of the gap at the upper side of the coil end, and the inner lead tab may protrude from the gap at the upper side of the coil end when the coil end vertex is moved to a lower side and the distance from the coil end vertex to the upper side of the coil end becomes L, wherein L is a +5 b.