CN108880008B - Stator, motor comprising the stator, and electrical apparatus comprising the motor - Google Patents
Stator, motor comprising the stator, and electrical apparatus comprising the motor Download PDFInfo
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- CN108880008B CN108880008B CN201710334285.6A CN201710334285A CN108880008B CN 108880008 B CN108880008 B CN 108880008B CN 201710334285 A CN201710334285 A CN 201710334285A CN 108880008 B CN108880008 B CN 108880008B
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- stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
An embodiment of the present invention relates to a stator, a motor including the stator, and an electric apparatus including the motor, wherein the stator is annularly arranged with respect to a central axis, and includes: a plurality of core units; a plurality of insulators covering the plurality of core units, respectively; a plurality of coils each of which is formed by winding a conductive wire around the core unit with the insulating member interposed therebetween; and a center connection portion located radially inside the plurality of core units and integrally connecting the plurality of core units via the plurality of insulators, wherein a metallic conductive member is provided on the center connection portion, and at least one end portion of at least a part of the wire is electrically connected to the metallic conductive member. Therefore, the problem that the inner ring space of the central connecting part is insufficient and the wiring cannot be performed can be solved.
Description
Technical Field
The present invention relates to the field of motors, and more particularly, to a stator, a motor including the stator, and an electrical apparatus including the motor.
Background
In the prior art, when each stator core is assembled into a ring-shaped stator, an additional positioning fixture is usually required to fix each stator core to ensure that each stator core can be arranged in a ring shape at equal intervals. Such a positioning jig requires a large number of man-hours for mounting and dismounting.
On the other hand, in the coil ends of the motor stator, the ends of the three-phase coil are generally manually welded by a tool to form a Y-connection or a Δ -connection, and after the welding, an insulation process is required. Since the space near the outer diameter of the stator is larger than the space near the inner diameter of the stator after each stator core is annularly arranged, the wire inlet end and the wire outlet end of the coil of each stator core are generally disposed near the outer diameter of the stator for coil routing and connection, but such a winding method increases copper loss and coil impedance. Therefore, the wiring method is considered to be modified to wiring near the inner diameter of the stator, but the connection and insulation processing of the coil ends cannot be performed due to insufficient space near the inner diameter of the stator.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the invention.
Disclosure of Invention
In order to solve the above problems pointed out by the background art, embodiments of the present invention provide a stator, a motor including the stator, and an electrical apparatus including the motor, in which a single stator core unit can be conveniently assembled into a ring-shaped stator by a structure of the stator, and routing and insulation processes are performed near an inner diameter of the stator.
According to a first aspect of embodiments of the present invention, there is provided a stator, annularly arranged with respect to a central axis, comprising:
a plurality of core units;
a plurality of insulators covering the plurality of core units, respectively;
a plurality of coils each of which is formed by winding a conductive wire around the core unit with the insulating member interposed therebetween;
a center connecting portion located radially inside the plurality of core units and integrally connecting the plurality of core units via the plurality of insulators,
it is characterized in that the preparation method is characterized in that,
a metallic conductive member is disposed on the central connecting portion,
at least one end of at least a portion of the wire is electrically connected to the metallic conductive member.
According to a second aspect of embodiments of the present invention, there is provided a motor comprising the stator of the first aspect described above.
According to a third aspect of embodiments of the present invention, there is provided an electrical apparatus comprising the motor of the second aspect described above.
The invention has the beneficial effects that: through the structure of this stator, can conveniently assemble into annular stator with single stator core to walk line and insulating treatment near stator internal diameter department.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
Elements and features described in one drawing or one implementation of an embodiment of the invention may be combined with elements and features shown in one or more other drawings or implementations. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts for use in more than one embodiment.
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic view of a stator of embodiment 1;
fig. 2 is an exploded view of a core unit, an insulator and a coil of the stator of embodiment 1;
fig. 3 is a combination view of a core unit, an insulator and a coil of the stator of embodiment 1;
fig. 4 is a schematic combination view of the center connection part of the stator of embodiment 1;
fig. 5 is an exploded schematic view of a center connection part of the stator of embodiment 1;
fig. 6 is a schematic view of a one-phase coil series connection of the stator of embodiment 1;
FIG. 7 is a schematic diagram of the stator assembled by connecting coils of each phase in series;
fig. 8 is a schematic view of parallel connection of one-phase coils of the stator of embodiment 1;
fig. 9 is a schematic diagram of the stator assembled by connecting coils of each phase in parallel.
Detailed Description
The foregoing and other features of embodiments of the present invention will become apparent from the following description, taken in conjunction with the accompanying drawings. In the following description and drawings, particular embodiments of the invention are disclosed in detail as being indicative of some of the embodiments in which the principles of the embodiments of the invention may be employed, it being understood that the embodiments of the invention are not limited to the embodiments described, but, on the contrary, are intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims.
In the embodiments of the present invention, the terms "first", "second", and the like are used for distinguishing different elements by name, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.
In embodiments of the invention, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.
In the embodiment of the present invention, for the sake of convenience of description, a direction parallel to a direction in which the shaft extends is referred to as an "axial direction", a radial direction around the shaft is referred to as a "radial direction", and a circumferential direction around the shaft is referred to as a "circumferential direction", but this is for the sake of convenience of description only, and the orientation of the motor during use and manufacture is not limited.
Various embodiments of the present invention will be described below with reference to the drawings. These embodiments are merely exemplary and are not intended to limit embodiments of the present invention.
Example 1
The present embodiment provides a stator that is annularly configured relative to a central axis. Fig. 1 is a schematic view of the stator, which, as shown in fig. 1, includes: a plurality of core units 101, a plurality of insulators 102, a plurality of coils 103, and a center connection portion 104. In fig. 1, for convenience of explanation, only one core unit 101, one insulator 102, and one coil 103 are shown by reference numerals.
In the present embodiment, as shown in fig. 1, the plurality of insulators 102 cover the plurality of core units 101, respectively, and each coil 103 is formed by winding a conductive wire around the core unit 101 via the insulator 102. Fig. 2 is an exploded view of a core unit 101, an insulator 102, and a coil 103, and fig. 3 is a combined schematic view of a core unit 101, an insulator 102, and a coil 103.
In the present embodiment, as shown in fig. 1, the center connecting portion 104 is located radially inward of the plurality of core units 101, and integrally connects the plurality of core units 101 with the plurality of insulators 102 interposed therebetween. Fig. 4 is a schematic view of the center connection portion 104, and fig. 5 is an exploded view of the center connection portion 104.
In the present embodiment, as shown in fig. 4 and 5, a metallic conductive member 105 is provided on the center connection portion 104, and at least one end portion of at least a part of the wires is electrically connected to the metallic conductive member 105. Therefore, wiring can be performed at the position close to the inner diameter of the stator, and the problem that wiring cannot be performed due to insufficient space of an inner ring of the stator is solved.
In one embodiment, the plurality of coils 103 may be a three-phase coil composed of three conductive wires, and the conductive metal member 105 is connected to one end of each conductive wire of the three-phase coil. Thereby, the Y-connection can be formed radially inside the stator.
In the present embodiment, as shown in fig. 4 and 5, the conductive metal member 105 has an exposed portion 1051 exposed from the center connection portion 104, and at least one end portion of at least a part of the lead is electrically connected to the exposed portion 1051.
In one embodiment, the plurality of coils 103 are configured as a three-phase coil from three conductive wires, and the exposed portion 1051 of the conductive metal member 105 is connected to one end of each conductive wire of the three-phase coil. Thereby, the Y-connection can be formed radially inside the stator.
In the example of fig. 4 and 5, the conductive metal part 105 has a ring shape, and an insulating cover 106 is further provided on the conductive metal part 105, whereby it is possible to expose the exposed portion 1051 from the central connecting portion 104 to connect with at least one end portion of at least a part of the wires and to avoid other wires or other end portions of the wires from being electrically connected to the conductive metal part 105 to cause a short circuit.
In this embodiment, the configuration of the metal conductive member 105 shown in fig. 4 and 5 is not limited, and in other embodiments, the metal conductive member 105 may be disposed on the central connection portion 104 in other manners as long as it can be connected to at least one end of at least a portion of the conductive wire.
In the present embodiment, the exposed portion 1051 of the metallic conductive member 105 is located on one axial side of the center connecting portion 104, i.e., on the upper axial side as shown in fig. 5. Therefore, wiring can be facilitated.
In one embodiment, when viewed in the axial direction, the core unit 101 in which the coil 103 connected to the end of the conductive wire connected to the exposed portion 1051 of the conductive metal member 105 is located and the exposed portion 1051 of the conductive metal member 105 connected to the end of the conductive wire are located on the same radial line extending radially outward from the center of the center connecting portion 104. That is, as shown in fig. 1, the center line of the core unit 101-1 in the radial direction coincides with the center line of the exposed portion 1051-1 in the radial direction, where the core unit 101-1 is symmetrical with respect to the center line in the radial direction, and similarly, the exposed portion 1051-1 is symmetrical with respect to the center line in the radial direction, and the end of the coil 103-1 is electrically connected to the exposed portion 1051-1, and the core unit 101-1 is the core unit in which the coil 103-1 is located. Therefore, wiring can be facilitated.
In the present embodiment, the exposed portions 1051 are plural and adjacent to each other in the circumferential direction. For example, instead of the structure of the metallic conductive member 105 of fig. 4 and 5, an exposed portion 1051 is provided only at some positions in the circumferential direction as the metallic conductive member 105, and is connected to at least one end portion of at least a part of the lead. Thereby, the amount of the metal conductive member 105 can be saved.
In one embodiment, the plurality of coils 103 are configured as a three-phase coil from three conductive wires, the three exposed portions 1051 are three, and the three exposed portions 1051 of the conductive metal member 105 are connected to one end of each conductive wire of the three-phase coil. Thereby, the Y-connection can be formed radially inside the stator.
In one embodiment of this embodiment, as shown in fig. 1 and 4, the central connection portion 104 is annular, and has first grooves 1041, the number of which is the same as that of the core units 101, provided on one axial side thereof, an annular plate 1042, which extends radially outward, provided on the other axial side thereof, and second grooves 1043, the number of which is the same as that of the core units, provided on the radially outward side of the annular plate 1042.
In the present embodiment, as shown in fig. 2 and 3, one axial side of each insulator 102 is provided with a columnar portion 107 made of a conductive material and extending radially inward, the insulator 102 is provided between the columnar portion 107 and the core unit 101, and the columnar portion 107 is coupled to one first groove 1041 on one axial side of the center connecting portion 104.
In the present embodiment, as shown in fig. 2 and 3, a convex portion 108 that protrudes radially inward is provided on the other axial side of each insulator 102, and the convex portion 108 is coupled to one second groove 1043 of the annular plate 1042 on the other axial side of the center connecting portion 104.
In the present embodiment, as described above, the conductive metal member 105 may have the exposed portion 1051 exposed from the center connection portion 104, at least one end portion of at least a part of the conductive wire may be electrically connected to the exposed portion 1051, the exposed portion 1051 of the conductive metal member 105 may be exposed from at least one of the first grooves 1041, and the columnar portion 107 to which the end portion of the conductive wire is electrically connected may be connected to the exposed portion 1051 of the conductive metal member 105. Thus, the conductive metal member 105 can be positioned and Y-connected radially inward of the stator by the first groove 1041 without requiring any other exposed portion.
In the present embodiment, one first groove 1041 and one second groove 1043 are located on the same radial line extending radially outward from the center of the center connection portion 104 as viewed in the axial direction. That is, as shown in fig. 4, the center line of the first groove 1041 in the radial direction coincides with the center line of the second groove 1043 in the radial direction. Here, the first grooves 1041 are symmetrically configured with respect to a center line thereof in the radial direction, and similarly, the second grooves 1043 are symmetrically configured with respect to a center line thereof in the radial direction. This facilitates the combination and fixation of the insulator 102 and the center connecting portion 104.
In the present embodiment, as shown in fig. 4, the second trench 1043 is a circular trench recessed inward in the radial direction. This enables further secure fixation.
The stator according to the embodiment of the present invention can be preferably implemented by the present embodiment, which shows one connection mode of the insulator 102 and the center connection portion 104, but the present embodiment is not limited thereto, and the insulator 102 covering the core unit 101 and wound with the coil 103 may be connected to the center connection portion 104 by another mode instead of the columnar portion 107 and the convex portion 108, the first groove 1041, and the second groove 1043 in the present embodiment. Fig. 2 shows that the insulating member 102 has a separate structure, but in another embodiment, the insulating member 102 may have another practicable structure.
In one embodiment of the present embodiment, as described above, the plurality of coils 103 are configured as three-phase coils by three conductive wires, and the coils of each phase are connected in series. Fig. 6 is a schematic diagram of the combination of the coils of one phase connected in series with the central connection portion 104, and fig. 7 is a schematic diagram of the combination of the coils of three phases with the central connection portion 104 in detail.
As shown in fig. 6, the plurality of coils of each phase are formed of one wire, and one end a of the wire is electrically connected to conductive metal member 105 (exposed portion 1051). For example, the end a is electrically connected to the columnar portion 107 made of a conductive material, and the columnar portion 107 is electrically connected to the conductive metal member 105 (the exposed portion 1051), whereby the end a is electrically connected to the conductive metal member 105 (the exposed portion 1051).
As shown in fig. 7, only one end a of each phase is electrically connected to the columnar portion 107, and the three-phase coil has three ends a-1, a-2, a-3 electrically connected to the columnar portion 107. In this embodiment, the columnar portion 107 may be electrically connected to the metallic conductive member 105 (the exposed portion 1051) by welding, but this embodiment is not limited thereto.
In another embodiment of the present embodiment, the plurality of coils 103 are formed as three-phase coils by a plurality of conductive wires, and the coils of each phase are connected in parallel. Fig. 8 is a schematic diagram of the combination of the coils of one phase connected in parallel with the center connection portion 104, and fig. 9 is a detailed combination schematic diagram of the combination of the coils of three phases with the center connection portion 104.
As shown in fig. 8, the plurality of coils of each phase are formed of a plurality of wires, each of which is wound around an insulator 102 covering the core unit 101 to form a coil 103, and one end portion B of the wire is electrically connected to a metallic conductive member 105 (exposed portion 1051). For example, the end portion B is electrically connected to the columnar portion 107 made of a conductive material, and the columnar portion 107 is electrically connected to the conductive metal member 105 (the exposed portion 1051), whereby the end portion B is electrically connected to the conductive metal member 105 (the exposed portion 1051).
As shown in fig. 9, each coil 103 has one end B electrically connected to the columnar portion 107, and each phase coil has four ends B-1, B-2, B-3 electrically connected to the columnar portion 107. In this embodiment, the columnar portion 107 may be electrically connected to the conductive metal member 105 (the exposed portion 1051) by welding, but this embodiment is not limited thereto.
Through the structure of the stator of the embodiment, the problem that the inner ring space of the central connecting part is insufficient and wiring cannot be conducted can be solved.
Example 2
The present embodiment provides a motor having the stator described in embodiment 1 and a rotor axially opposed to the stator. Since the structure of the stator has already been described in detail in embodiment 1, the contents thereof are incorporated herein, and the description thereof is omitted here. The present embodiment is not limited to the structure of the rotor and other configurations of the motor, and reference may be made to the prior art.
Through the structure of the stator of the motor of the embodiment, the problem that the wiring cannot be performed due to insufficient inner ring space of the central connecting part of the stator can be solved.
Example 3
The present embodiment provides an electric apparatus having the motor described in embodiment 2. Since the structure of the stator of the motor has been described in detail in embodiments 1 and 2, the contents thereof are incorporated herein and the description thereof is omitted here.
In the present embodiment, the electric device may be an electric motor used for an industrial device, but the present embodiment is not limited thereto, and in another embodiment, the motor of embodiment 2 may be used as a miniaturized electric motor such as a robot joint drive.
With the structure of the stator of the motor of the electrical equipment of the present embodiment, the problem that the wiring cannot be performed due to insufficient inner ring space of the center connection portion of the stator can be solved.
While the invention has been described with reference to specific embodiments, it will be apparent to those skilled in the art that these descriptions are illustrative and not intended to limit the scope of the invention. Various modifications and alterations of this invention will become apparent to those skilled in the art based upon the spirit and principles of this invention, and such modifications and alterations are also within the scope of this invention.
Claims (11)
1. A stator, annularly configured relative to a central axis, comprising:
a plurality of core units;
a plurality of insulators covering the plurality of core units, respectively;
a plurality of coils each of which is formed by winding a conductive wire around the core unit with the insulating member interposed therebetween;
a center connecting portion located radially inside the plurality of core units and integrally connecting the plurality of core units via the plurality of insulators,
it is characterized in that the preparation method is characterized in that,
a metallic conductive member having an exposed portion exposed from the center connecting portion, the exposed portion being located on one axial side of the center connecting portion,
at least one end of at least a part of the lead wires is electrically connected to the exposed portion.
2. The stator according to claim 1,
the plurality of coils are formed by three conducting wires into a three-phase coil;
the metallic conductive member is connected to one end of each of the conductive wires of the three-phase coil.
3. The stator according to claim 1,
the core unit in which the coil is led out of the end portion of the lead wire connected to the exposed portion of the conductive metal member and the exposed portion of the conductive metal member connected to the end portion of the lead wire are located on the same radial line extending radially outward from the center of the center connecting portion, as viewed in the axial direction.
4. The stator according to claim 3,
the exposed portions of the metallic conductive members are plural and adjacent to each other in the circumferential direction.
5. The stator according to claim 1 or claim 4,
the plurality of coils are formed by three conducting wires into a three-phase coil;
the exposed portion of the metallic conductive member is connected to one end of each of the conductive wires of the three-phase coil.
6. The stator according to claim 1,
the central connecting part is in a ring shape,
one axial side of the central connecting part is provided with first grooves with the same number as the iron core units,
the other axial side of the central connecting part is provided with an annular plate extending to the radial outside, the radial outside of the annular plate is provided with second grooves with the same number as the iron core units,
each of the insulators is provided at one axial side thereof with a columnar portion made of a conductive material and extending radially inward, the insulator is provided between the columnar portion and the core unit, the columnar portion is engaged with one of the first grooves at one axial side of the center connection portion,
and a convex part protruding towards the radial inner side is arranged on the other axial side of each insulating piece, and the convex part is mutually combined with one second groove of the annular plate on the other axial side of the central connecting part.
7. The stator according to claim 6,
the exposed portion of the conductive metal member is exposed from at least one of the first grooves, and the columnar portion electrically connected to an end of the lead wire is connected to the exposed portion of the conductive metal member.
8. The stator according to claim 6,
one of the first grooves and one of the second grooves are located on the same radial line extending radially outward from the center of the center connection portion as viewed in the axial direction.
9. The stator according to claim 6,
the second groove is a circular groove recessed radially inward.
10. A motor is characterized in that a motor is provided,
the motor having the stator of any one of claims 1 to 9; and a rotor axially opposed to the stator.
11. An electrical apparatus, characterized in that the electrical apparatus has the motor of claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334285.6A CN108880008B (en) | 2017-05-12 | 2017-05-12 | Stator, motor comprising the stator, and electrical apparatus comprising the motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710334285.6A CN108880008B (en) | 2017-05-12 | 2017-05-12 | Stator, motor comprising the stator, and electrical apparatus comprising the motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108880008A CN108880008A (en) | 2018-11-23 |
| CN108880008B true CN108880008B (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710334285.6A Active CN108880008B (en) | 2017-05-12 | 2017-05-12 | Stator, motor comprising the stator, and electrical apparatus comprising the motor |
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| CN (1) | CN108880008B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003081755A1 (en) * | 2002-03-26 | 2003-10-02 | Ebm Werke Gmbh & Co. Kg | Stator for electric motors having a winding interconnection assembly |
| WO2016174894A1 (en) * | 2015-04-28 | 2016-11-03 | 日本電産株式会社 | Motor |
-
2017
- 2017-05-12 CN CN201710334285.6A patent/CN108880008B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003081755A1 (en) * | 2002-03-26 | 2003-10-02 | Ebm Werke Gmbh & Co. Kg | Stator for electric motors having a winding interconnection assembly |
| WO2016174894A1 (en) * | 2015-04-28 | 2016-11-03 | 日本電産株式会社 | Motor |
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| CN108880008A (en) | 2018-11-23 |
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