JP5660993B2 - Laminated iron core - Google Patents

Description

  The present invention relates to a structure of a laminated core constituting a stator core of a rotating electric machine, and more particularly to improvement of magnetic characteristics and assembly workability of the laminated core.

  In the conventional iron core device, a first core member that continuously arranges a plurality of plate-like first core pieces and a second core member that continuously arranges a plurality of plate-like second core pieces are laminated. Alternately in the direction, the position between the first core pieces of the first core member and the position between the second core pieces of the second core member are shifted in the longitudinal direction, and adjacent to each other in the stacking direction of the core pieces. Are connected so that the edges of adjacent core pieces are connected to each other, and are formed into an annular or rectangular shape by rotating the core pieces with the connecting means. Has been. And the 1st core member and the 2nd core member are laminated | stacked alternately one sheet each, or several same number (for example, refer patent document 1).

JP 2000-201458 A

The conventional iron core device has a configuration in which the same number of first core members and second core members are alternately stacked. For example, when the first core member and the second core member are alternately stacked one by one, in a structure in which the number of all the first core members and the second core members are equally small, each core piece is connected by the connecting means. There was a problem that the friction when rotating increased, and the dimensional accuracy and assembly workability of the iron core device deteriorated. Also, if the first core member and the second core member are laminated in an equal number, the magnetic path resistance increases and the magnetic characteristics deteriorate.
The present invention was made to solve the above-described problems, and has an object to obtain a laminated core with reduced magnetic path resistance while suppressing friction when each core piece is rotated by a connecting means. To do.

The laminated core according to the present invention includes a first core member formed by stacking one or more first core sheets formed by continuously arranging a plurality of plate-like first core pieces, and a plurality of plate-like members. A second core member formed by stacking one or a plurality of second core sheets formed by continuously arranging the second core pieces, and a position between each first core piece of the first core member and the second core member. The positions between the second core pieces of the second core member are shifted in the longitudinal direction, and alternately adjacent edges in the stacking direction of the first core pieces and the second core pieces overlap each other. A connecting means is provided which is stacked and rotatably connects the edges to the overlapping edges of the first and second core pieces. The number of the first and second core sheets forming the first and second core members varies depending on the stacking position of the core members, and further, the first and second cores. Among the members, the number of the first and second core sheets forming the core member disposed on the upper and lower ends in the stacking direction is the first and second cores forming the core member disposed in the central portion in the stacking direction. More than the number of sheets.

The laminated core according to the present invention includes a first core member formed by stacking one or more first core sheets formed by continuously arranging a plurality of plate-like first core pieces, and a plurality of plate-like members. A second core member formed by stacking one or a plurality of second core sheets formed by continuously arranging the second core pieces, and a position between each first core piece of the first core member and the second core member. The positions between the second core pieces of the second core member are shifted in the longitudinal direction, and alternately adjacent edges in the stacking direction of the first core pieces and the second core pieces overlap each other. The first and second core members are stacked and provided with connecting means for rotatably connecting the edge portions to the overlapping edge portions of the first and second core pieces to form the first and second core members. 2 the number of core sheets, there are different places by stacking position of each core member, further said first, second cores Among the materials, the number of the first and second core sheets forming the core member disposed on the upper and lower end sides in the stacking direction is the first and second cores forming the core member disposed in the center portion in the stacking direction. Since there are more sheets than the number of sheets, in the first and second core pieces on the upper and lower ends where a lamination gap is likely to occur due to cracking or peeling between the laminations, the friction during rotation is reduced to suppress the occurrence of the lamination gap. This can reduce the distortion of the laminated core and improve the dimensional accuracy.

It is a top view which shows the structure of the stator iron core of the rotary electric machine which consists of a laminated iron core in Embodiment 1 of this invention. It is a top view which shows the structure of the laminated iron core in Embodiment 1 of this invention. It is a top view which shows the structure of the 1st core member and 2nd core member which form the laminated iron core in Embodiment 1 of this invention. It is a fragmentary sectional view which follows the XX line of the laminated iron core of FIG. It is a top view which shows the structure of the stator core of the rotary electric machine which consists of a laminated core in Embodiment 2 of this invention. It is a top view which shows the state which the lamination | stacking iron core in Embodiment 2 of this invention developed. It is a fragmentary sectional view which follows the YY line of the laminated iron core of FIG.

Embodiment 1 FIG.
FIG. 1 is a plan view showing a configuration of a stator core 100 of a rotating electric machine composed of a laminated core 1 according to Embodiment 1 of the present invention, FIG. 2 is a plan view showing the configuration of the laminated core 1, and FIG. FIG. 4 is a partial cross-sectional view taken along the line XX of the laminated core 1 of FIG. 2, and shows the connecting portions of adjacent core pieces. Show.
As shown in FIG. 1, a stator core 100 of a rotating electrical machine is formed by arranging a plurality of laminated cores 1 (here, six) in an annular shape.

  As shown in FIGS. 2 to 4, such a laminated core 1 is formed by stacking one or a plurality of first core sheets 22 </ b> A formed by continuously arranging a plurality of first core pieces 21 </ b> A. One core member 2A and second core members 2B formed by stacking one or a plurality of second core sheets 22B formed by continuously arranging a plurality of second core pieces 21B are alternately stacked. It is formed by. FIG. 2 is a plan view of a laminated core 1 formed by laminating the first core member 2A and the second core member 2B shown in FIG. One core member 2A is visible.

The first core piece 21A includes a back yoke portion 23A and a tooth portion 24A protruding from the central portion of the back yoke portion 23A, and is connected to the surface of one edge 25A (right side in FIG. 3) of the back yoke portion 23A. A concave portion 260A as the means 26A is formed, and a convex portion 261A as the connecting means 26A is formed on the back surface. The end face 27A of the edge portion 25A is formed in a substantially convex arc shape, and the other end face 28A is formed in a substantially concave arc shape that engages with the one end face 27A.
The first core sheet 22A is configured by using six such first core pieces 21A and continuously arranging the first core pieces 21A through the end faces 27A and 28A of the back yoke portion 23A. End surfaces 29A of the first core pieces 21A that are both ends of the first core sheet 22A are formed in a straight line, and form the end portions 11 of the laminated core 1.

The second core piece 21B has substantially the same configuration as the first core piece 21A, but the arrangement of the connecting means 26B is opposite to that of the first core piece 21A. That is, the second core piece 21B includes a back yoke portion 23B and a tooth portion 24B, and the concave portion 260B and the convex portion 261B as the connecting means 26B are provided on the other edge 25B (left side in FIG. 3) of the back yoke portion 23B. Is provided. The concave portion 260B is provided on the surface of the edge portion 25B, and the convex portion 261B is provided on the back surface of the edge portion 25B. The end face 27B of the edge 25B is formed in a substantially convex arc shape, and the end face 28B on one side is formed in a substantially concave arc shape that engages with the end face 27B on the other side.
The second core sheet 22B is configured by using six such second core pieces 21B and arranging them continuously via the end faces 27B and 28B of the back yoke portion 23B. The end surfaces 29B of the second core piece 21B that are both ends of the second core sheet 22B are formed in a straight line and form the end portion 11 of the laminated core 1.

The laminated core 1 is formed by alternately laminating the first core member 2A and the second core member 2B. At that time, the position between the first core pieces 21A of the first core member 2A (that is, the first core member 2A) The position between the end faces 27A and 28A of the first core piece 21A) and the position between the second core pieces 21B of the second core member 2B (that is, the position between the end faces 27B and 28B of the second core piece 21B) are long. The edges 25A and 25B adjacent to each other in the stacking direction of the first core pieces 21A and the second core pieces 21B are alternately stacked so as to overlap each other.
Then, the concave portion 260A and the convex portion 261B provided on the overlapping edge portions 25A and 25B of the first core piece 21A and the second core piece 21B or the convex portion 261A and the concave portion 260B are fitted, The edge portions 25A and 25B are rotatably connected. That is, the first core piece 21A and the second core piece 21B adjacent to each other in the stacking direction are rotatably connected by the connecting means 26A and 26B.
In addition, on the front and back surfaces of the tooth portions 24A and 24B of the first and second core pieces 21A and 21B, unshown coupling uneven portions are provided, and the uneven portions of the core pieces 21A and 21B above and below in the stacking direction. Are fixed in the stacking direction.
Further, in the first core member 2A formed from the plurality of first core sheets 22A, the concave portion 260A and the convex portion 261A provided as the connecting means 26A are fitted vertically so that the first core member 2A includes the first core sheet 2A. The first core pieces 21A are secured in the stacking direction. Similarly, in the second core member 2B formed of the plurality of second core sheets 22B, the concave portion 260B provided as the connecting means 26B and the convex portion 261B are fitted vertically so that the second core member 2B has a second core member 2B. The second core pieces 21B are fixed to each other in the stacking direction.

  The number of the first and second core sheets 22A and 22B forming the first and second core members 2A and 2B constituting the laminated core 1 varies depending on the position where the core members 2A and 2B are laminated. In the first embodiment, the first core member 2A in which three first core sheets 22A are stacked from the upper side in the stacking direction, the second core member 2B in which three second core sheets 22B are stacked, and the first in one sheet. First core member 2A made of core sheet 22A, second core member 2B made of one second core sheet 22B, first core member 2A made of one first core sheet 22A, and one second core sheet A laminated core 1 is formed by a second core member 2B made of 22B, a first core member 2A in which three first core sheets 22A are stacked, and a second core member 2B in which three second core sheets 22B are stacked. Yes.

Six laminated iron cores 1 configured in this way are used, the connecting means 26A and 26B of these laminated iron cores 1 are rotated and arranged in an annular shape, and the end portions 11 of the adjacent laminated iron cores 1 are welded together. The stator core 100 is formed by bonding.
In addition, the number of first and second core members 2A and 2B constituting the laminated core 1, the number of first and second core sheets 22A and 22B constituting the first and second core members 2A and 2B, the first The number of the first and second core pieces 21A, 21B constituting the second core sheets 22A, 22B is not limited to the above configuration, and the number of the laminated cores 1 constituting the stator core 100, the teeth The number of parts 24 is not limited to this.
In the first embodiment, the connecting means 26A and 26B are configured by fitting the concave portion 260A and the convex portion 261B or fitting the convex portion 261A and the concave portion 260B. However, the present invention is not limited to this. For example, it is good also as a structure which provides a through-hole in edge 25A, 25B, and connects by inserting a pin member in this through-hole.

Here, in the place where the first and second core members 2A and 2B are arranged with a large number of first and second core sheets 22A and 22B to be formed, the first and second core members 2A and 2B with a small number are arranged. Compared to the case where the first core piece 21A and the second core piece 21B are rotated by the connecting means 26A and 26B, the friction between the layers is reduced, which is necessary when the laminated core 1 is deformed. Torque can be reduced and assembly workability can be improved.
In addition, since the magnetic paths are also formed in the stacking direction at the overlapping edges 25A and 25B of the first core piece 21A and the second core piece 21B, the number of the first and second core sheets 22A and 22B is small. 1 and the location where the second core members 2A and 2B are disposed, the increase in the magnetic path resistance is suppressed compared to the location where the first and second core members 2A and 2B are disposed with a large number of core sheets 22A and 22B. Thus, the magnetic performance can be improved.
The laminated iron core 1 according to the first embodiment does not constitute all the first and second core members 2A and 2B constituting the laminated iron core 1 from the same number of first and second core sheets 22A and 22B. Since there are locations where the number of first and second core sheets 22A, 22B constituting each core member 2A, 2B differs depending on the stacking position of each core member 2A, 2B, the first, The effects of both the case where the number of the second core sheets 22A and 22B is large and the case where the number is small are obtained, and the laminated iron core is suppressed by suppressing the friction when the first and second core pieces 21A and 21B are rotated by the connecting means. In addition to improving the assembly workability, it is possible to obtain a laminated core having high magnetic properties by reducing the magnetic path resistance.

Particularly in the first embodiment, the number of the first and second core sheets 22A and 22B forming the first and second core members 2A and 2B arranged on the upper and lower ends in the stacking direction of the stacked core 1 is increased ( In this example, three sheets), the first and second core pieces 21A and 21B on the upper and lower end sides where a lamination gap is likely to occur due to cracking or peeling between the laminations, the friction during rotation is reduced to suppress the generation of the lamination gap. be able to. Thereby, distortion of the laminated core 1 can be reduced and dimensional accuracy can be improved.
Further, since the dimensional accuracy of the laminated core 1 is improved, it is possible to prevent the end 11 from being displaced or distorted. Thereby, when forming the stator core 100, the edge parts 11 of the adjacent laminated cores 1 can be faced | matched reliably, and workability | operativity improvement and welding strength at the time of connecting the edge parts 11 by welding etc. are achieved. Improvements can be made.

  In the first embodiment, the number of the first and second core sheets 22A and 22B forming the first and second core members 2A and 2B disposed in the central portion of the laminated core 1 in the stacking direction is reduced. There is one here. In the laminated core 1, magnetic flux easily leaks on the upper and lower ends in the stacking direction, and the amount of magnetic flux increases on the center side than on the upper and lower ends in the stacking direction. The configuration of the first embodiment can efficiently use the magnetic flux at the central portion in the stacking direction of the laminated core 1 having a large amount of magnetic flux, and can further improve the magnetic performance. And the friction at the time of rotation can be aimed at the upper-lower end side of the laminated iron core 1 from which magnetic flux leaks.

Embodiment 2. FIG.
FIG. 5 is a plan view showing a configuration of a stator core 110 of a rotating electrical machine composed of a laminated core 10 according to Embodiment 2 of the present invention, FIG. 6 is a plan view showing a state in which the laminated core 10 is developed, and FIG. It is a fragmentary sectional view which follows the YY line of the laminated iron core 10 of FIG. 5, and shows the connection part of an adjacent core piece.
In the first embodiment, the stator core 100 is configured by arranging the six laminated cores 1 in a ring shape. However, in the second embodiment, the stator core 110 is configured by one laminated core 10. Yes. Further, the number of first and second core sheets 220A and 220B constituting the first and second core members 20A and 20B, and the first and second core pieces 21A constituting the first and second core sheets 220A and 220B. , 21B is different from that of the first embodiment. In addition, about the structure similar to the said Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

The laminated iron core 10 includes first and second core members 20A formed of first and second core sheets 220A and 220B configured by continuously arranging nine first and second core pieces 21A and 21B. , 20B are alternately stacked.
The laminated core 10 includes a first core member 20A in which five first core sheets 220A are stacked from the upper side in the stacking direction, a second core member 20B in which three second core sheets 220B are stacked, and a first core in one sheet. First core member 20A made of sheet 220A, second core member 20B made of one second core sheet 220B, first core member 20A made of one first core sheet 220A, and one second core sheet 220B The second core member 20B is composed of a first core member 20A in which two first core sheets 220A are stacked, and a second core member 20B in which three second core sheets 220B are stacked.

As described in Embodiment 1, the upper and lower ends in the stacking direction are likely to cause stacking gaps due to cracks or peeling between the stacks. However, when the upper end side and the lower end side are compared, the lower end side may be cracked or peeled off. Is pressed by the load of the first and second core pieces 21A and 21B stacked on each other to reduce the generation of the lamination gap, and the generation of the lamination gap is remarkable on the upper end side. And when a lamination | stacking gap | interval generate | occur | produces in the upper end side, reworking work, such as pressurizing again, will be needed, and workability | operativity will worsen.
In the laminated core 10 of the second embodiment, the number of core sheets 220A (here, 5) forming the first core member 20A arranged on the upper end side in the laminating direction is the second number arranged on the lower end side in the laminating direction. Since the number of core sheets 220B forming the core member 20B is larger than the number of core sheets 220B (here, three), in addition to the effects of the first embodiment, the generation of the stacking gap on the upper end side where the stacking gap is more likely to occur is further increased. Suppressing and reworking can improve productivity.

  Further, in the second embodiment, the stator core 110 is formed by making one laminated core 10 into one circle, so that the distortion appears to be shifted to one place, and the laminated iron core 10 is more than in the case of the first embodiment. The distortion and deviation of the end 11 are remarkable. However, by improving the dimensional accuracy of the laminated core 10 by increasing the number of the first and second core sheets 220A and 220B forming the first and second core members 20A and 20B arranged on the upper and lower ends in the stacking direction. Further, distortion and displacement of the end portion 11 can be prevented. As a result, the end portions 11 can be neatly aligned and abutted against each other, and workability improvement and weld strength improvement can be achieved when the end portions 11 are connected to each other by welding or the like.

  In addition, the number of first and second core members 20A and 20B constituting the laminated core 10, the number of first and second core sheets 220A and 220B constituting the first and second core members 20A and 20B, the first The number of the first and second core pieces 21A, 21B constituting the second core sheets 220A, 220B is not limited to the above configuration, and the number of the tooth portions 24 constituting the stator core 110 is also limited thereto. It is not limited.

1,10 laminated iron core, 2A first core member, 2B second core member,
20A 1st core member, 20B 2nd core member, 21A 1st core piece,
21B 2nd core piece, 22A 1st core sheet, 22B 2nd core sheet,
25A, 25B edge, 26, 26A, 26B connecting means, 220A first core sheet,
220B 2nd core sheet, 260A, 260B recessed part, 261A, 261B Convex part.

Claims (3)

A first core member formed by stacking one or more first core sheets formed by continuously arranging a plurality of plate-like first core pieces, and a plurality of plate-like second core pieces continuously. And a second core member formed by stacking one or more second core sheets arranged in a plurality of positions, the positions between the first core pieces of the first core member and the second core members. The position between the core pieces is shifted in the longitudinal direction, and the adjacent edges in the stacking direction of the first core pieces and the second core pieces are alternately stacked,
A connecting means for rotatably connecting the edges to the overlapping edges of the first and second core pieces;
The number of the first and second core sheets forming the first and second core members is different depending on the lamination position of the core members ,
Further, among the first and second core members, the number of the first and second core sheets forming the core member disposed on the upper and lower ends in the stacking direction is the core member disposed in the center in the stacking direction. A laminated iron core characterized in that there are more than the number of the first and second core sheets forming the core. Among the first and second core members constituting the laminated core, the number of the first and second core sheets forming the core member arranged on the upper end side in the laminating direction is arranged on the lower end side in the laminating direction. The laminated iron core according to claim 1, wherein the number of the first and second core sheets forming the core member to be formed is larger than the number of the core members. 3. The laminate according to claim 1, wherein the coupling means is a concave portion and a convex portion that are provided on the overlapping surfaces of the edge portions of the first and second core pieces and are fitted to each other. Iron core.

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