WO2011152074A1

WO2011152074A1 - Core for dynamo-electric machine, and dynamo-electric machine

Info

Publication number: WO2011152074A1
Application number: PCT/JP2011/050159
Authority: WO
Inventors: 克則今地; 輝久喜多川
Original assignee: 株式会社安川電機
Priority date: 2010-06-04
Filing date: 2011-01-07
Publication date: 2011-12-08
Also published as: CN102948039A; JPWO2011152074A1

Abstract

Provided are a high-performance core for a dynamo-electric machine, and a dynamo-electric machine. A core (1) for a dynamo-electric machine, formed by stacking core pieces (3), wherein the ends (3a) of each of the core pieces (3) are connected to each other by connection members (5) to form the core (1) in an annular shape. The connection members (5) are each provided with an elongated long section, and also with substantially circular engagement sections which are formed at opposite ends of the long section so as to be located at positions offset in one direction from the longitudinal axis of the long section and which engage with cutout holes formed in the core pieces (3).

Description

Rotating electrical machine core and rotating electrical machine

The present invention relates to a core of a rotating electric machine and a rotating electric machine.

Conventionally, a plate-shaped core piece that has been stamped and punched is laminated and integrated, and ends are connected to each other to form an annular shape (see Patent Document 1). This is said to be able to improve magnetic performance, rigidity and mechanical accuracy.

JP 2000-201458 A

However, in recent years, higher performance has been demanded as the market demands have become more sophisticated.

Therefore, an object of the present invention is to provide a high-performance rotating electrical machine core and a rotating electrical machine.

In order to solve the above problems, according to one aspect of the present invention, a core of a rotating electrical machine formed by stacking a plurality of core pieces, each end of the core pieces being connected by a connecting member. It is configured in an annular shape, and the connecting member is formed in a long elongated portion and on both sides of the long portion at a position offset in one direction from the longitudinal direction of the long portion, and the core piece A core of a rotating electrical machine characterized by including a substantially circular engaging portion that engages with the formed notch hole is applied.

According to the present invention, a high-performance rotating electrical machine core and rotating electrical machine having excellent rotational characteristics can be obtained.

It is a perspective view of a core. It is a perspective view of a core. It is a top view of another core piece. It is a top view of an electromagnetic steel plate. It is a top view of a core. It is a partial enlarged plan view of a core piece. It is a top view of a core piece. It is a top view of a core. It is a partial enlarged plan view of a core. It is a partial enlarged plan view of a core. It is an axial sectional view of a rotating electrical machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure, the same code | symbol is attached | subjected and duplication description is abbreviate | omitted suitably.

<First Embodiment>
A configuration of a rotating electrical machine core and a rotating electrical machine according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 11. 1 and 2 are perspective views of the core, FIGS. 3 and 4 are plan views of the core, FIG. 5 is a plan view of the core piece, FIG. 6 is a partially enlarged plan view of the core piece, and FIG. FIG. 8 is a plan view of an electromagnetic steel sheet, FIGS. 9 and 10 are partially enlarged plan views of the core, and FIG. 11 is an axial sectional view of the rotating electrical machine.

As shown in FIG. 1, the core 1 of the rotating electrical machine 20 (see FIG. 11) according to the present embodiment includes a plurality of core pieces 3 formed of electromagnetic steel plates in the thickness direction of the core piece 3 (the axis of the rotating electrical machine 20. The core plate is formed in a ring shape in such a manner that the end portions 3a of the core pieces 3 are connected to each other by a connecting member 5 in plan view from the axial direction of the rotating electrical machine 20. 7 (see FIG. 3).
In the thickness direction of the laminated core pieces 3, the core pieces 3 are fixed to each other by a caulking portion (not shown) as an interlayer bonding means by a half punching projection by a punching die. Note that an adhesive or the like may be employed as the interlayer bonding means.

As shown in FIG. 2, in the core 1, a plurality of divided core pieces 4 are laminated on the core plate 7, and serve as an interlayer bonding means by a half punching projection by a punching die. The other core piece 4 is integrated in an annular shape by being fixed by a caulking portion (not shown). Note that an adhesive or the like may be employed as the interlayer bonding means.

FIG. 4 is a plan view of another core piece 4 that is caulked and fixed to the core plate 7 by a caulking portion and arranged in an annular shape. The plurality of other core pieces 4 do not have a portion to which a means for directly connecting to each other like the connecting member 5 is connected, but indirectly to each other via the integrated core plate 7. It is connected. Thereby, the number of the connecting members 5 can be reduced, and the core 1 of the high-performance rotating electrical machine 20 with excellent rotational characteristics can be obtained with a relatively inexpensive configuration.

In FIG. 2, blocks 3 </ b> B in which a plurality of core pieces 3 are stacked and blocks 4 </ b> B in which a plurality of different core pieces 4 are stacked are alternately arranged. Thereby, another core piece 4 can be hold | maintained more reliably.
Furthermore, the stack thickness T3 of the block 3B is smaller than the stack thickness T4 of the block 4B. Thereby, since the quantity of the block 3B provided with the connection member 5 can be reduced, another core piece 4 can be hold | maintained more reliably by a comparatively cheap structure. As a result, it is possible to obtain the core 1 of the high-performance rotating electrical machine 20 having a relatively inexpensive configuration and excellent rotational characteristics.
The dimensions of the stack thickness T3 of the block 3B and the stack thickness T4 of the block 4B may be set in any way, but if the stack thickness T3 of the block 3B is larger than the stack thickness T4 of the block 4B Another core piece 4 can be held more strongly.

Next, details of the core piece 3 and the connecting member 5 will be described with reference to FIGS. 5 and 6. The core piece 3 has a well-balanced, symmetrical, substantially T-shape, and the end portions 3 a of the yoke portion 3 b are connected to each other by a connecting member 5. A tooth portion 3c extends from the inner peripheral side (one side) of the central portion of the yoke portion 3b, and a notch groove 3d is provided on the outer peripheral side (the other side). On both sides of the yoke portion 3b and on the outer peripheral side of each end portion 3a, accommodating portions 3e for accommodating the connecting members 5 are formed.

The connecting member 5 has a well-balanced symmetrical shape, and is offset from the longitudinal direction of the elongated portion 5a to one direction (inner peripheral side in FIG. 6) on both sides of the elongated portion 5a. There are a total of two substantially circular engaging portions 5b formed one at each position. The engaging portion 5b engages with a cutout hole 3f formed on the outer peripheral side of the end portion 3a in the core piece 3, and is rotatable within the cutout hole 3f within the surface of the core piece 3. . The engaging portion 5b has a shape that is difficult to come off from the notch hole 3f in the in-plane direction. In addition, when the notch hole 3f has a shape surrounding the engaging portion 5b with a larger area, the engaging portion 5b can be made more difficult to come off from the notch hole 3f in the in-plane direction.
By rotating the engaging portion 5b in the cutout hole 3f, the end portions 3a connected to each other by the connecting member 5 (see FIG. 5) are bent into an annular shape, and a circle with high mechanical strength is obtained. An annular core plate 7 and a core 1 can be formed. Further, since the core plate 7 and the core 1 are connected to each other in an annular shape, it is easy to ensure the inner diameter roundness of the core 1 and the like.
In the annular core plate 7, the long portion 5a is housed in the housing portion 3e, and the outer periphery 3g of the core piece 3 and the outer periphery 5c of the long portion 5a are located on substantially the same circumference. . Thereby, since a magnetic path is connected smoothly without being interrupted, magnetic characteristics are improved.

Next, the core piece 4 will be described with reference to FIG. Although the core piece 4 formed from the electromagnetic steel plate has substantially the same shape as the core piece 3, the shape of the end portion 4a is different. The core piece 4 has a well-balanced symmetrical shape and is substantially T-shaped. The tooth portion 4c extends from the inner peripheral side (one side) of the central portion of the yoke portion 4b, and the outer peripheral side (the other side). Is provided with a notch groove 4d. The core piece 4 is not formed with the accommodating portion 3e or the notch hole 3f. When the core piece 4 is arranged in an annular shape (see FIG. 4), the outer periphery 4g of the core piece 4 is positioned on substantially the same circumference.

Next, with reference to FIG. 8, the manufacturing method of the

core pieces

3 and 4 and the connection member 5 is demonstrated. From the strip-shaped electromagnetic steel sheet W, the

core pieces

3 and 4 and the connecting member 5 are punched out. The electromagnetic steel sheet W is fed by feeding means (not shown) using the feed hole Wa. The connecting member 5 is extracted from the electromagnetic steel sheet W after being punched out using the punching die capable of selective punching operation with the engaging portion 5b engaged with the notch hole 3f. It is held lightly in the notch hole 3f so as not to be detached from the core piece 3. The

teeth portions

3c and 4c of the

core pieces

3 and 4 are alternately arranged in the longitudinal direction of the electromagnetic steel sheet W so that the material yield increases. The

core pieces

3 and 4 are punched with a punching die having two types of shapes corresponding to the respective shapes.

Next, the connection form of the terminal portion 3E of the core piece 3 will be described with reference to FIGS. The end portions 3E are connected by a hook 6 having substantially the same shape as the connecting member 5. One hook 6 is provided at a position that is offset in one direction (the inner peripheral side in FIGS. 9 and 10) from the longitudinal direction of the long portion 6a on both sides of the long portion 6a. A total of two substantially circular

engaging portions

6b and 6d formed one by one are provided.
The engaging portion 6b engages with a cutout hole 3f formed on the outer peripheral side of the terminal end portion 3E in the connected core piece 3, and can rotate within the cutout hole 3f within the surface of the core piece 3. It has become. When the hook 6 is rotated about the engaging portion 6b in a state where the engaging portion 6b is engaged with the notch hole 3f, the engaging portion 6d is connected to the outer peripheral side of the end portion 3E in the connected core piece 3. It engages with the notch hole 3h formed in the. Therefore, the engaging portion 6d as the terminal engaging portion can be inserted into the notch hole 3h in the in-plane direction, and has a shape that is difficult to be removed from the notch hole 3h in the in-plane direction. . The hook 6 can maintain the shape of the assembled ring and can prevent the ring from opening after being formed into a ring.
When the hook 6 is engaged with the cutout holes 3f and 3h, the elongated portion 6a is accommodated in the accommodating portion 3e, and the outer periphery 3g of the core piece 3 and the outer periphery 6c of the elongated portion 6a are substantially the same. Located on the circumference. Thereby, since a magnetic path is connected smoothly without being interrupted, magnetic characteristics are improved.

Next, the rotating electrical machine according to the first embodiment of the present invention will be described with reference to FIG. The rotating electrical machine 20 includes a rotor 30 that rotates about an axis G and a stator 40 that rotates the rotor 30. The rotor 30 includes a shaft 31 and a plurality of magnets 32. The stator 40 includes a coil 41 and a cylindrical frame 42.
In the rotating electrical machine 20, the rotor 30 or the stator 40 is formed using the core 1 including the

core pieces

3 and 4 and the connecting member 5 described above. Therefore, the rotating electrical machine 20 is a high-performance rotating electrical machine having excellent magnetic characteristics.

As described above, the core 1 and the rotating electrical machine 20 of the rotating electrical machine according to the embodiment of the present invention are configured in an annular shape by connecting the end portions 3a of the core pieces 3 used in the rotating electrical machine with the connecting member 5. The connecting member 5 is formed into a long elongated portion 5a and notches formed in the core piece 3 at positions offset from the longitudinal direction of the elongated portion 5a in one direction on both sides of the elongated portion 5a. Since the core 1 having high mechanical strength can be formed and the inner diameter roundness of the core 1 can be easily secured. Therefore, the core of the rotating electrical machine and the rotating electrical machine according to the embodiment of the present invention have an effect that cogging failure can be reduced. That is, it is possible to obtain a high-performance rotating electrical machine core having excellent rotational characteristics.
In addition, an accommodating portion 3e in which the elongated portion 5a is accommodated is formed at both outer peripheral end portions 3a of the core piece 3, and in the core piece 3 connected by the connecting member 5, the outer periphery 3g of the core piece 3 and the elongated portion 5a. Since the outer circumferences 5c are positioned on substantially the same circumference, the magnetic paths are smoothly connected without being interrupted, so that the magnetic characteristics are improved.
Furthermore, since the other core pieces 4 are integrated by stacking and fixing a plurality of other core pieces 4 in a divided state to the core pieces 3 connected by the connecting member 5, the connecting members 5 are integrated. Therefore, it is possible to obtain a core of a high-performance rotating electric machine having a relatively inexpensive configuration and excellent rotational characteristics.

The embodiment of the present invention has been described above. However, a so-called person skilled in the art can appropriately modify the above embodiment without departing from the gist of the present invention, and can appropriately combine the above embodiment and the method according to the modified example. It is. That is, it is needless to say that even a technique with such a change is included in the technical scope of the present invention.
For example, the core piece 3 may be laminated after being formed into an annular shape, or may be formed into an annular shape after the core piece 3 is laminated.
Alternatively, the core piece 3 may be formed in an annular shape while being spirally wound to form a so-called wound core.

DESCRIPTION OF SYMBOLS 1 Core 3 Core piece 4 Another core piece 5 Connection member 20 Rotating electrical machinery

Claims

A core of a rotating electrical machine formed by laminating a plurality of core pieces,
Each end of the core piece is connected with a connecting member and is configured in an annular shape,
The connecting member is
An elongated part, and
A substantially circular engaging portion that is formed on both sides of the long portion at a position offset in one direction from the longitudinal direction of the long portion, and engages with a notch hole formed in the core piece;
A core of a rotating electrical machine characterized by comprising:
2. The another core piece is integrated by stacking and fixing a plurality of separate core pieces in a divided state to the core pieces connected by the connecting member. The core of the described rotating electrical machine.
An accommodating portion for accommodating the elongated portion is formed at both ends of the outer periphery of the core piece, and the outer periphery of the core piece and the outer periphery of the elongated portion are positioned on substantially the same circumference in the core plate. The core of the rotating electrical machine according to claim 1 or 2.
The said core piece and the said connection member are stamped and formed from the same steel plate in the state in which the said engaging part was engaged with the said notch hole, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Core of rotating electrical machine.
The core of the rotating electrical machine according to any one of claims 1 to 4, wherein the core piece, the connecting member, and the another core piece are formed by punching from the same steel plate.
A rotor and a stator using a core formed by stacking a plurality of core pieces;
A rotating electric machine with
Each end of the core piece is connected with a connecting member and is configured in an annular shape,
The connecting member is
An elongated part, and
A substantially circular engaging portion that is formed on both sides of the long portion at a position offset in one direction from the longitudinal direction of the long portion, and engages with a notch hole formed in the core piece;
A rotating electrical machine comprising:
7. The another core piece is integrated by laminating and fixing a plurality of separate core pieces in a divided state to the core pieces connected by the connecting member. The core of the described rotating electrical machine.
An accommodating portion for accommodating the elongated portion is formed at both ends of the outer periphery of the core piece, and the outer periphery of the core piece and the outer periphery of the elongated portion are positioned on substantially the same circumference in the core plate. The core of the rotating electrical machine according to claim 6 or 7.
A rotor using a core formed by stacking a plurality of core pieces, a stator,
A rotating electric machine with
Each end of the core piece is connected with a connecting member and is configured in an annular shape,
The connecting member is
An elongated part, and
A substantially circular engaging portion that is formed on both sides of the long portion at a position offset in one direction from the longitudinal direction of the long portion, and engages with a notch hole formed in the core piece;
A rotating electrical machine comprising:
The other core pieces are integrated by stacking and fixing a plurality of separate core pieces in a divided state to the core pieces connected by the connecting member. The core of the described rotating electrical machine.
An accommodating portion for accommodating the elongated portion is formed at both ends of the outer periphery of the core piece, and the outer periphery of the core piece and the outer periphery of the elongated portion are positioned on substantially the same circumference in the core plate. The core of the rotating electrical machine according to claim 9 or 10.