JP2933807B2 - Core of rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core of a rotary electric machine, and more particularly to a core plate constituting the core.

[0002]

2. Description of the Related Art As an iron core used for a rotating electric machine, an iron core formed by winding a core plate having a plurality of salient poles projecting from a yoke portion in an annular shape is known. 8 and 9 show examples of the iron core of such a rotating electric machine. 8 and 9,
The core plate 11 constituting the iron core of the rotating electric machine is formed by winding a band-shaped magnetic plate in an annular shape.
a, a plurality of salient poles 11b protruding from the yoke portion 11a are formed on the inner peripheral side. By laminating a plurality of such core plates 11, an iron core of the rotating electric machine is formed.

[0003] The core plate 11 is formed by forming a plurality of salient poles on one side in the longitudinal direction of a strip-shaped material, curling in the same plane, and connecting both ends. In order to connect and completely fix both ends of the core plate 11 as shown in FIG.
Alternatively, as shown in FIG. 9, a concave portion is formed at one end portion, a convex portion 11c is formed at the other end portion, and the concave portion at both ends is fitted to the convex portion 11c to connect. Or

[0004]

However, if both ends of the core plate 11 are connected by welding 13 as shown in FIG. 8, the connected portion is plastically deformed. When the iron core is formed by laminating the sheets and used in a rotating electric machine or the like, the magnetic circuit characteristics deteriorate. Further, the portion where the core plate 11 is actually welded is a portion of the outer periphery, and the entire surface cannot be joined, so that the magnetic loss increases.

Further, as shown in FIG. 9, when a method is used in which a concave portion and a convex portion are formed at both ends, and the concave portion and the convex portion are fitted and joined, a gap is formed at the joint portion between the concave portion and the convex portion. However, there is a disadvantage that the magnetic circuit characteristics are inferior.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems.
An object of the present invention is to provide an iron core for a rotating electric machine in which deterioration of magnetic circuit characteristics is minimized.

[0007]

According to the first aspect of the present invention,
A strip-shaped magnet with multiple salient poles protruding from the yoke
Curled in the same plane as the plate surface
Plate to form, a core of a rotary electric machine to form a core plate laminating a plurality, disposed incorporate seam member to adhere the both ends of the core plate seam curling cores plate,
The rolling direction of the joint is parallel to the yoke .

[0008]

[0009]

The invention according to claim 2 is characterized in that the rolling direction of the core plate is parallel to the projecting direction of the salient poles.

The invention according to claim 3 is characterized in that the uneven portion provided at the joint of the core plate is fixed by caulking as a joint.

[0012]

A plurality of salient poles projecting from the yoke are provided.
Curling of a band-shaped magnetic plate in the same plane as the plate surface
Then, a core plate is formed, and both ends of the core plate are connected by interposing a joint at a connection portion. The joints eliminate gaps at both ends of the core plate, thereby improving magnetic circuit characteristics. Since the rolling direction of the joint is parallel to the yoke portion and the rolling direction of the core plate is parallel to the protruding direction of the salient poles, the magnetic loss of the core plate is reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an iron core of a rotating electric machine according to the present invention will be described below. In FIG. 1, the iron core of the rotating electric machine is configured by laminating a plurality of core plates 1. Such a core plate 1 includes an annular yoke 1a,
And a salient pole 1b projecting radially outward from the yoke 1a.

The core plate 1 is formed by curling a band-shaped magnetic material as a magnetic plate in an annular shape in the same plane and joining both ends. For this reason, the portion where both ends are joined remains as the joint 1 c on the core plate 1.
A trapezoidal notch is formed on both sides with the seam 1c as the center, and a drum-shaped seam 2 having the same shape as the shape obtained by combining both notches is incorporated in this notch. In this manner, by incorporating the joint body 2 into the cutout portion of the joint 1c of the core plate 1, both ends of the core plate 1 are attracted and brought into close contact, and the fixing strength of the joint 1c portion is dramatically improved. be able to. In addition, since both ends of the core plate 1 are attracted to each other by the joint 2, no gap is formed at the joint 1c, and the degree of adhesion is improved.
Magnetic circuit characteristics are also dramatically improved.

On the other hand, in order to improve the magnetic properties of the iron core,
The core plate 1 is configured such that the rolling direction A and the projecting direction of the salient poles 1b are parallel. Also, as shown in FIG.
The joint 2 assembled into the cutout of the joint 1c of the core plate 1 is parallel to the direction in which the yoke 1a is formed,
Moreover, a direction B perpendicular to the rolling direction of the core plate 1
It is formed by rolling. When a grain-oriented electrical steel sheet is used as the material of the core plate 1, its magnetic pole direction is defined as the A direction.
When a grain-oriented electrical steel sheet is used as the material of the joint 2, the magnetic pole direction is defined as the B direction.

Next, a procedure for forming the core plate 1 as described above will be described. The strip-shaped material having a plurality of salient poles 1b formed on one side by press punching or the like is curled in the same plane in a direction in which both ends face each other as shown in FIG. Then, as shown in FIG. 4, the trapezoidal cut-out portions at both ends face each other, and the seam 2 is assembled into the two cut-out portions facing each other to fix both ends, and the core plate is fixed. 1 is formed. By laminating a plurality of core plates 1 formed in this way, an iron core of a rotating electric machine is formed.

By attaching the joint 2 for bringing both ends of the core plate 1 into close contact with the joint 1c of the core plate 1, the core plate 1
The fixing strength of the joint 1c can be dramatically improved. Since the joint 2 is incorporated in the core plate 1 in such a manner as to draw both ends thereof, the degree of adhesion is improved, and the magnetic characteristics can be improved. Also, the joint 2 is parallel to the direction in which the yoke 1a is formed,
Moreover, since the core plate 1 is formed by rolling in the direction B perpendicular to the rolling direction A (the direction in which the salient poles protrude), loss of the magnetic circuit characteristics due to the seam 1c is minimized, and good results are obtained. Magnetic circuit characteristics can be obtained. In the above embodiment, the core plate constituting the iron core of the rotating electric machine having salient poles on the outer periphery has been described, but the core plate constituting the iron core of the rotating electric machine having a plurality of salient poles formed on the inner peripheral side is also joined. Body 2 is applicable. Also, a plurality of joints may be formed at the joint.

As a joint body for bringing both ends of the core plate 1 into close contact with each other, for example, one having a substantially gourd shape as shown in FIG. 6 may be used. As shown in FIG. 5, as a method of bringing both ends into close contact, a trapezoidal concave portion 1d and a convex portion 1c are formed at both ends of the core plate 1, and after the concave portion 1d and the convex portion 1c are fitted together, the convex portion is formed. The edge portion of 1c may be caulked and fixed. In this case, the swaged portion becomes a seam. As shown in FIG. 7, a straight portion 1e may be formed at the root of the convex portion, and a caulked portion 1f may be formed at the tip of the convex portion to fix the convex portion.

In the embodiment described above, the band-shaped material is curled in an annular shape. However, the present invention is not limited to this. For example, a plurality of divided core plates are joined in an annular shape. Also applicable to iron cores.

[0020]

According to the first aspect of the present invention, the yoke portion is provided.
A strip-shaped magnetic plate provided with a plurality of salient poles protruding from
Curling in the same plane as the surface of the core to form a core plate
And, due to the provision of the seam material for adhering both ends of the core plate at the joint of the core plate, it is possible to improve the mechanical strength of the seam, improving the magnetic circuit characteristics it is possible to adhere the both ends of the core plate Can be achieved. Also,
By incorporating a joint at the seam of the core plate, the core
Both ends of the plate are drawn by the seam plate, so there is no gap
This does not occur, and the magnetic characteristics can be improved. Ma
Since the rolling direction of the joint was parallel to the yoke,
It is possible to improve magnetic properties by reducing air loss
Become.

[0021]

[0022]

According to the second aspect of the present invention, since the rolling direction of the core plate is parallel to the projecting direction of the salient poles, it is possible to improve the magnetic characteristics.

According to the third aspect of the present invention, since the uneven portion provided at the seam of the core plate is caulked and fixed as a seam, the strength of the seam can be improved and a gap is formed at the seam. Therefore, the magnetic properties can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a core plate applied to an iron core of a rotating electric machine according to the present invention.

FIG. 2 is an enlarged plan view of a main part of the core plate;

FIG. 3 is a plan view showing an example of one step of a forming procedure of the core plate.

FIG. 4 is a plan view showing an example of another step in the procedure of forming the core plate.

FIG. 5 is a plan view showing another example of the core plate applied to the iron core of the rotating electric machine according to the present invention.

FIG. 6 is a plan view showing still another example of the core plate applied to the iron core of the rotating electric machine according to the present invention.

FIG. 7 is a plan view showing still another example of the core plate applied to the iron core of the rotating electric machine according to the present invention.

FIG. 8 is a plan view showing an example of a core plate applied to an iron core of a conventional rotating electric machine.

FIG. 9 is a plan view showing another example of a core plate applied to an iron core of a conventional rotating electric machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Core board 1a Yoke part 1b Salient pole 2 Joint

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-63046 (JP, A) JP-A-62-162408 (JP, A) JP-A-52-34301 (JP, A) 9349 (JP, U) Special table Hei 4-507186 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02K 1/00-1/34 H02K 15/02

Claims (3)

(57) [Claims] A belt-shaped magnetic plate provided with a plurality of salient poles protruding from a yoke portion is mounted on a car surface in the same plane as the plate surface.
Seam to form a core plate and a ring, a core of a rotary electric machine to form a core plate laminating a plurality, of adhering the opposite ends of the core plate at the joint of the curling of <br/> core plate The rolling direction of the joint is the same as that of the yoke.
A rotating electromagnetic iron core that is parallel to the part . 2. The rolling direction of the core plate is the same as that of the salient poles.
The iron core of the rotating electric machine according to claim 1, wherein the core is a row. 3. A joint body provided with an uneven portion provided at a joint of a core plate.
The iron core of the rotating electric machine according to claim 1, wherein the iron core is fixed by caulking.