JPH08196060A - Laminated core for stator - Google Patents

Abstract

PURPOSE: To realize compact insulation for the pole and the inner surface of a yoke without altering the molding previously by applying an insulating film to the pole part of a laminated split yoke core and the inner circumferential surface of a yoke prior to application of a winding to the pole part. CONSTITUTION: Split yoke core pieces 1, each comprising a pole part 2 and a circumferential part 3 of a yoke, are laminated through a caulking part 4 and coupled to produce a laminate core for stator. The circumferential part 3 of yoke is provided, on one side thereof, with a coupling protrusion 5 and, on the other side thereof, with a coupling recess 6 and and adjacent split yoke core pieces 1 are coupled through fitting. Subsequently, a winding is applied to the pole part 2 of the split yoke laminated core 7 through an insulating film 8 applied previously to the pole part 2 and the inner surface of the circumferential part 3 of the yoke. Since the insulating film 8 is soft and excellent in adhesion, it can cover the pole part 2 and the inner surface of the circumferential part 3 of the yoke tightly. Furthermore, tight insulation can be realized because variation in the height or size of the split yoke laminated core 7 can be dealt with by simply varying the size of the insulating film 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator laminated core.

[0002]

2. Description of the Related Art As is well known, the stator of a motor applies a rotating magnetic field to the rotor to operate it. As for the stator, there is a manufacturing method in which the yoke portion and the magnetic pole portion are divided in order to improve the original function of the stator by winding the winding wire around the magnetic pole portion at a high density and also to facilitate the winding work. .

For example, in Japanese Examined Patent Publication No. 57-12378, a yoke iron core piece is punched by a progressive die apparatus and laminated by caulking to produce a yoke laminated iron core, which is divided and punched and magnetic pole iron core pieces are laminated by caulking and laminated. It is proposed to manufacture a stator by manufacturing the magnetic pole laminated core and winding it on the magnetic pole laminated core.

Other divisional manufacturing of the stator is as follows. That is, a yoke in which magnetic poles are formed at intervals is divided into a plurality of pieces in the circumferential direction, punched, caulked and laminated, and wound around the magnetic pole portion of the laminated divided yoke, and then the laminated The divided yokes are connected to form a cylindrical shape. Since the magnetic poles to be wound are in an open state, they have the effect of facilitating the winding work.

When winding the magnetic pole portion, an insulating plate is attached to the magnetic pole portion and the inner peripheral surface of the yoke prior to the winding to insulate the laminated stator core. .

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
It is indispensable to attach the insulation plate to the inner peripheral surface to secure the insulation. By the way, the stator laminated core has various sizes, and the height of the magnetic pole portion and the size of the circumferential surface of the yoke change. In response to this change, the length of the insulating plate and the size and height along the magnetic pole must be changed. In order to cope with this, it is necessary to prepare various insulating plates of different sizes, which is difficult to prepare and complicated to manage. Further, although the insulating plate is formed so as to be in close contact with the magnetic pole portion and the inner peripheral surface of the yoke, there is a problem that several kinds of forming tools are required.

Since the insulating plate has rigidity and does not adhere to the magnetic pole portion and the inner peripheral surface of the yoke, the insulating plate may come off during mounting, and the insulating plate is mounted. Workability is not good. Further, if the shape of the insulating plate does not match well with the shapes of the magnetic pole portion and the inner peripheral portion of the yoke, a void is generated to reduce the winding density.

According to the present invention, even if the size and height of the laminated stator core are changed, the inner surface of the magnetic pole portion and the yoke can be densely insulated without performing various forming processes in advance. The purpose is to obtain a laminated iron core. Another object of the present invention is to attach the above-mentioned insulating film without a gap to improve the rotation output and increase the winding density.

[0009]

DISCLOSURE OF THE INVENTION The gist of the present invention is to wind a magnetic pole portion of a divided yoke laminated iron core obtained by crimping laminated divided yoke iron core pieces, and to divide the divided yoke laminated iron core into a cylinder. In a stator laminated core formed by connecting in a circular shape, an insulating film is attached to the magnetic pole portion of the laminated split yoke core and the inner peripheral surface of the yoke,
It is in a laminated stator core wound around the magnetic pole.

[0010]

According to the present invention, since the insulating film is attached to the magnetic poles of the divided yoke laminated iron core, even if the divided yoke laminated iron core is changed in size, the insulating film is reshaped. It can be coated without changing the size. Further, the insulating film is soft and is closely attached to the magnetic pole portion and the circumferential surface of the yoke without forming a void, and has an effect of increasing the winding density thereafter.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described based on an embodiment with reference to the drawings. In the drawing, reference numeral 1 denotes a split yoke core piece, which has a magnetic pole portion 2 and a yoke circumferential portion 3, and the split yoke core piece 1 is laminated via a caulking portion 4, and thereafter,
It is connected to form a laminated stator core.

A connecting projection 5 is formed on one surface of the yoke circumferential portion 3 and a connecting recess 6 is formed on the other surface thereof so as to be fitted and connected to the adjacent split yoke core pieces 1. It has become.

The split yoke core piece 1 is caulked and laminated as a split yoke laminated core 7 as shown in FIG. Winding is performed on the magnetic pole portion 2 of the divided yoke laminated iron core 7, but before that, an insulating film 8 such as a polymide film is adhered to the magnetic pole portion 2 and the inner surface of the yoke circumferential portion 3 to form an insulating film. To form. Since the insulating film 8 is soft and has excellent adhesiveness, the magnetic pole portion 2 and the yoke circumferential portion 3 on which an insulating film is to be formed are desired.
The inner surface can be covered tightly. Further, even if the dimensions such as the height and the outer diameter of the split yoke laminated iron core 7 are changed, it can be dealt with only by changing the size of the insulating film 8. Further, since the insulating film 8 can be easily attached to the side surface of the tip end spread 2a of the magnetic pole part 2, the stator laminated core 9 having a cylindrical shape by connecting the divided yoke laminated cores 7 is used. The insulation between them is enhanced, and the magnetic flux leakage is greatly reduced, which has the effect of increasing the rotational output.

The insulating film 8 is not limited to being attached to a single sheet, but may be overlapped if necessary. It can also be adhered via an adhesive or an adhesive tape.

After the insulating film 8 is attached to the split yoke laminated iron core 7, the winding 10 is wound around the magnetic pole portion 2. Since the magnetic pole portion 2 is not hindered by others due to the division, the winding 10 has a density because the magnetic pole portion 2 and the yoke circumferential portion 3 are densely attached with the insulating film 8 as described above. It can be wound high.

[0016]

As described above, in the split yoke laminated iron core of the present invention, since the insulating film is closely adhered to the inner peripheral surfaces of the magnetic pole portion and the yoke circumferential portion, the insulation is excellent and the rotation output is high. Improved and the windings are made denser. Even if the size of the divided yoke laminated iron core is changed, the insulating film can be attached to the magnetic pole portion and the yoke circumference portion without requiring a new molding process, and the workability can be improved and the productivity can be improved. And so on.

[Brief description of drawings]

FIG. 1 is a view showing a split yoke core piece according to an embodiment of the present invention.

FIG. 2 is a diagram showing a divided yoke laminate according to one embodiment of the present invention.

FIG. 3 is a diagram showing a laminated stator core according to one embodiment of the present invention.

[Explanation of symbols]

 1 split yoke core piece 2 magnetic pole portion 3 yoke circumferential portion 4 caulking portion 5 coupling protrusion 6 coupling recess 7 split yoke laminated iron core 8 insulating film 9 stator laminated iron core 10 winding wire

Claims (1)

[Claims] 1. A stator laminated iron core obtained by winding the divided yoke laminated iron core pieces by caulking and laminating the divided yoke laminated iron core on a magnetic pole portion and connecting the divided yoke laminated iron cores in a cylindrical shape. 2. The stator laminated core according to claim 1, wherein an insulating film is attached to the magnetic pole portion of the laminated split yoke core and the inner circumferential surface of the yoke circumference, and the winding is wound around the magnetic pole portion.