JP2009100516A - Continuous segment core material to be used for wound laminated core, and wound laminated core using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a continuous segment core material to be used for a wound laminated core that can materialize the further improvement of the yield of a material for a core. <P>SOLUTION: This is a rectilinear continuous segment core material 10 which is used for the wound laminated core 21 that is manufactured by bending, at a junction 11, adjacent segment core pieces 12 coupled with each other at the junction 11, and winding them in a spiral form thereby performing lamination setup, and in which the center of the circular arc of each circular segment core piece 12 lies on one side in its width direction. First and second straight sections 18 and 19, which are parallel with the longitudinal direction of the continuous segment core material 10, are formed on both sides of the inner circumference of each segment core piece 12. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention provides a continuous segment core used for a wound laminated core (which may be a fixed laminated core and a rotor laminated core) in which a plurality of segment core pieces continuous in a strip shape are folded at a connecting portion and spirally wound to be laminated. The present invention relates to a material and a wound laminated iron core using the same.

In the case of a general die-laminated iron core, the material is punched and laminated in an integral annular shape, so the yield of the material is poor. Further, when the diameter of the annular iron core is increased, it is necessary to use a large press device for punching. Therefore, Patent Document 1 proposes a wound laminated core produced by spirally winding and laminating a large number of segment core pieces punched in a strip shape.
With the technique described in Patent Document 1, although the yield is improved as compared with the annular core, further improvement in yield is required. Patent Document 2 proposes a technique that meets such a demand.

JP 2007-143258 A Japanese Patent Laid-Open No. 1-264548

However, in the technique of Patent Document 2, there is a problem that only a part of the central portion of the divided yoke piece is cut off, and the degree thereof is extremely small, and does not contribute to the large yield improvement of the iron core piece.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a continuous segment core material used for a wound laminated core capable of realizing further improvement in the material yield of the iron core, and a wound laminated core using the same. And

The continuous segment core material according to the first aspect of the invention that meets the above object is manufactured by laminating and assembling by laminating adjacent segment core pieces that are connected to each other at the connecting portion and then spirally winding at the connecting portion. A linear continuous segment core material used in a wound laminated iron core and having an arc center of each arc-shaped segment core piece on one side in the width direction, the continuous segment on both sides of the inner peripheral edge of each segment core piece First and second straight portions parallel to the length direction of the iron core were formed.
Here, each segment core piece has one or more magnetic poles.

Further, the continuous segment core material according to the second invention is the continuous segment core material according to the first invention, wherein the first and second straight portions formed on both sides of each segment core piece are the same straight line. On the line.

A continuous segment core material according to a third aspect of the present invention is the continuous segment core material according to the second aspect of the present invention, wherein the arc is in the same center as the arc center of each segment core piece between the first and second straight portions. Is formed.

A continuous segment core material according to a fourth aspect of the present invention is the continuous segment core material according to the second or third aspect of the invention, wherein the first and second straight portions are made of the strip plate material that is the material of the continuous segment core material. The side edges are used as they are.

The continuous segment core material according to the fifth aspect of the present invention is the continuous segment core material according to the first to fourth aspects of the invention, in the central position of the outer peripheral portion of each segment core piece in the length direction of the continuous segment core material. A parallel third straight portion was formed.

A continuous segment core material according to a sixth invention is the continuous segment core material according to the first to fifth inventions, wherein the first and second straight portions bend the adjacent segment core pieces at the connecting portion. A notch is formed in the inner peripheral part of the wound laminated iron core formed in this way.

And the wound laminated iron core which concerns on 7th invention is the state which piled up the continuous segment iron core material which concerns on 6th invention so that the said notch part adjacent to a lamination direction may be in a different position in the circumferential direction. It is formed by winding and laminating.
Here, the state in which a plurality of sheets are stacked refers to multiple windings in which at least two or more continuous segment core materials are stacked and wound.

Since the continuous segment iron core material of Claims 1-6 formed the 1st, 2nd linear part parallel to the length direction of a continuous segment iron core material in the both sides of the inner periphery of each segment iron core piece, the part As a result, the width of the continuous segment core material can be reduced, and the yield of manufacturing the continuous segment core material from the strip material (strip material) is improved.
In particular, when the segment core piece has a magnetic pole on the outer side in the radial direction, the magnetic performance does not deteriorate even if a part of the arc-shaped segment core piece on the inner side in the radial direction is missing.

In particular, in the continuous segment core material according to claim 2, the first and second straight portions formed on both sides of the inner peripheral edge of each segment core piece are on the same straight line. Can be narrower.

In the continuous segment core material according to claim 3, since an arc having the same center as the arc center of each segment core piece is formed between the first and second straight portions, A shaft having a circular cross section can be arranged in the center.

In the continuous segment iron core material according to claim 4, since the first and second straight portions are formed using the side edges of the strip plate material as the material of the continuous segment iron core material as they are, Yield can be improved.

In the continuous segment iron core material according to claim 5, since the third straight line portion parallel to the length direction of the continuous segment iron core material is also formed at the center position of the outer peripheral portion of each segment iron core piece, Yield can be improved.

In the continuous segment core material according to claim 6, the first and second straight portions form notches in the inner peripheral portion of the wound laminated core formed by bending adjacent segment core pieces at the connecting portion. As a result, the weight of the wound laminated iron core can be reduced.

The wound laminated iron core according to claim 7 is wound and laminated in a state where a plurality of the continuous segment iron core materials according to claim 6 are stacked such that the notch portions adjacent in the laminating direction are at different positions. Therefore, the segment core piece adjacent to the stacking direction appears from the notch, and an engaging portion that meshes with a jig or the like for winding these continuous segment cores can be formed in this portion. Moreover, since it rolls and laminates in the state which accumulated the continuous segment iron core material of at least 2 or more, it is excellent in productivity.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a plan view of a continuous segment core material according to the first embodiment of the present invention, FIG. 2 is a plan view of a wound laminated core manufactured using the same continuous segment core material, and FIG. 3 is the present invention. The top view of the continuous segment iron core material which concerns on 2nd Embodiment of this, FIG. 4 is a top view of the winding lamination | stacking iron core manufactured using the same continuous segment iron core material.

In the continuous segment core material 10 according to the first embodiment of the present invention, a large number of segment core pieces 12 connected to each other by connecting portions 11 are manufactured from a strip material 13 made of a magnetic steel plate by pressing, and are chain-like. It is formed as a straight line. In this case, each segment core piece 12 has an arc shape and is divided so that there is an arc center on one side in the width direction of the continuous segment core material 10 and a plurality of pieces are combined to form an annular shape. And the connection part 11 is formed in the edge part of the radial direction outer side of each segment iron core piece 12. As shown in FIG. The connecting portion 11 has basically the same structure as that described in, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2007-143258) or Patent Document 2 (Japanese Patent Laid-Open No. 1-264548), and has an adjacent segment core. The pieces 12 are connected so as to be bendable.

FIG. 1 shows an enlarged view of the connecting portion 11 of FIG. 1, which includes a connecting band 11 a that connects adjacent segment core pieces 12, and absorbs the swelling of the connecting band 11 a when bent on the radially outer side of the connecting band 11 a. A recess 11b is provided, and a semicircular recess 11c is provided radially inward of the connecting band 11a so that the connecting band 11a bends smoothly.

Engagement portions (see Patent Document 1) each having a concave portion and a convex portion (not shown) are provided at one end portion and the other end portion of each segment core piece 12, and each segment core piece 12 is positioned on the same circumference. It is like that. In this continuous segment core material 10, reference numeral 14 denotes a magnet insertion hole, and 15 denotes a pilot hole or a weight reducing hole (in this case, there is a pilot hole not shown). The pilot hole 15 can also be used as a bolt hole when the end plate is bolted after the segment core pieces 12 are wound and laminated.

The first and second straight portions 18, which are parallel to the length direction of the continuous segment core core material 10 (that is, both side lines of the strip 13) and collinearly, are formed on both sides of the inner peripheral edge of each segment core piece 12. 19. In each segment core piece 12, the centers of the first and second straight portions 18 and 19 are connected by an arc having the same center as the arc center of the segment core piece 12. Further, an engagement notch 19a used for engagement with a jig when the segment core piece 12 is wound is formed at an intermediate position of the arc of each segment core piece 12. This engagement notch 19a has a trapezoidal shape that opens to the outlet side. Since the first and second straight portions 18 and 19 use the side end portions of the strip material 13 as they are, the strip width of the strip material 13 can be narrower than in the prior art.

In FIG. 2, two continuous segment core members 10 that are arranged to be shifted by half the length of the segment core pieces 12 are used, and adjacent segment core pieces 12 in the respective continuous segment core pieces 10 are connected by connecting portions 11. In this embodiment, a wound laminated iron core 21 manufactured by winding and laminating so that two continuous segment iron core materials 10 overlap each other so as to be bent and spiraled is shown. In the inner peripheral portion, the first and second straight portions 18 and 19 are combined to form a cutout portion 22, and the continuous segment core 10 adjacent to the cutout portion 22 in the stacking direction. The engagement notch 19a appears.

That is, in the wound laminated iron core 21, when the plurality of continuous segment iron core materials 10 are wound and laminated, the connecting portion 11 and the notch portion 22 are laminated so as to be at different positions in the lamination direction. Since the shaft is inserted into the wound laminated core 21 in contact with the arc of each segment core piece 12, the notch 22 does not cause a problem in the insertion of the shaft, and the mechanical performance and the magnetic performance are not hindered. .

Then, the continuous segment iron core material 25 which concerns on the 2nd Embodiment of this invention shown in FIG. 3 is shown. The difference from the continuous segment core material 10 according to the first embodiment is that a third straight portion 27 is formed at the outer center of the arc-shaped segment core piece 26. Since the third straight portion 27 is parallel to the length direction of the continuous segment core material 25, similarly to the first and second straight portions 18 and 19, the first and second straight portions 18 and 19 are connected to each other. By forming the one side edge of the strip material 28 as it is and using the third straight portion 27 as the other side edge of the strip material 28, the narrower strip material 28 can be used.

And the engagement notch part 19a is provided in the circular arc inside each segment iron core piece 26. As shown in FIG. FIG. 4 shows a wound laminated core 29 produced by winding the continuous segment core material 25 by half the position of each segment core piece 26 and winding it in the same manner as in the first embodiment. As shown in FIG. A notch 30 is formed at the outer end of the wound laminated core 29, and arc-shaped segment core pieces 26 that are adjacent to each other in the laminating direction appear from the notch 30. By disposing the notch 30 at the center position of each magnetic pole part, it is possible to prevent the deterioration of the magnetic characteristics.

In the above embodiment, the rotor or the stator inside the motor has been described. However, the present invention can be applied to a stator or a rotor outside the motor.
Moreover, although the case where there are two magnetic poles in one segment core piece and two windings has been described, further multiple windings, depending on the case, one winding, and one segment core piece has one magnetic pole or The present invention is applied even if there are three or more.

It is a top view of the continuous segment iron core material which concerns on the 1st Embodiment of this invention. It is a top view of the winding lamination | stacking iron core manufactured using the continuous segment iron core material. It is a top view of the continuous segment iron core material which concerns on the 2nd Embodiment of this invention. It is a top view of the winding lamination | stacking iron core manufactured using the continuous segment iron core material.

Explanation of symbols

10: continuous segment core material, 11: connecting part, 11a: connecting band, 11b, 11c: recess, 12: segment core piece, 13: strip material, 14: magnet insertion hole, 15: pilot hole (or weight reduction) Hole), 18: first straight part, 19: second straight part, 19: engagement notch part, 20: side edge, 21: wound laminated core, 22: notch part, 25: continuous segment core material , 26: segment core piece, 27: third straight part, 28: strip material, 29: wound laminated core, 30: notch

Claims (7)

The segment core pieces adjacent to each other connected at the connecting portion are bent at the connecting portion, wound in a spiral shape, and used for a wound laminated core manufactured by stacking and assembling, and each arc-shaped one side in the width direction is used. A linear continuous segment core material with the arc center of the segment core piece,
A continuous segment core material, wherein first and second straight portions parallel to the length direction of the continuous segment core material are formed on both sides of the inner peripheral edge of each segment core piece. 2. The continuous segment core material according to claim 1, wherein the first and second straight portions formed on both sides of each segment core piece are on the same straight line. 3. The continuous segment iron core material according to claim 2, wherein an arc having the same center as the arc center of each segment core piece is formed between the first and second straight portions. Iron core material. The continuous segment core material according to any one of claims 2 and 3, wherein the first and second straight portions use side edges of a strip plate material as a material of the continuous segment core material as they are. A continuous segment core material characterized by being formed. In the continuous segment core material according to any one of claims 1 to 4,
A continuous segment core material, wherein a third straight line portion parallel to the length direction of the continuous segment core material is formed at the center position of the outer peripheral portion of each segment core piece. 6. The continuous segment core material according to claim 1, wherein the first and second straight portions are formed of the wound laminated core formed by bending adjacent segment core pieces at the connecting portion. A continuous segment core material characterized in that a notch is formed in the inner periphery. A wound laminated iron core, wherein the continuous segment iron core material according to claim 6 is wound and laminated in a state in which a plurality of the notched portions adjacent to each other in the laminating direction are stacked in a circumferential position.

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