JPH10271770A - Manufacture of stator for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a stator by coupling a plurality of core segments to constitute a series body of core segments and then rounding the series body into an annular body in which the space factor of coil can be enhanced by controlling the winding of coil around each core segment. SOLUTION: A series body 13 of core segments is divided into three sections and a core segment group 12 of each winding phase is fixed to a jig and wound with a coil. In winding, interval of each core segment 11 is enlarged or the position thereof is shifted by such extent as having no effect on the wire 21 connecting the coil of respective core segments 11 thus ensuring a space for winding control and winding the coil with high space factor. Subsequently, respective core segment groups are combined to obtain an annular body serving as a stator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for an electric motor, in which coils are wound around a plurality of core segments constituting respective phases of windings connected in series, and are rolled to form an annular body. The present invention relates to a method for manufacturing a stator.

[0002]

2. Description of the Related Art In recent years, in the course of energy saving, development of electric motors has been undertaken with high efficiency being the most important issue. The biggest challenge in working with high-efficiency motors is the realization of high space factor windings in status lots. The winding of the stator of the motor is performed by insulating the cylindrical stator core.However, the winding work is difficult because of the cylindrical shape. The winding shape and the slot shape are limited, and the space factor of the winding is limited. Regarding this, there is disclosed a method in which a plurality of core segments constituting a stator are connected in series to form a winding, thereby creating a space around the winding slot in which the winding can be easily controlled (Japanese Patent Application Laid-Open No. Hei 8 (1996)). -19196).

[0003] Regarding the series of core segments,
For example, as shown in FIG. 2, each core segment 11 is punched and laminated as an integral core, and each core segment 11 is connected by a thin joint 14 which is easily deformed. As shown in FIG. Is a laminated sheet of the core sheet 10 punched independently, has a groove 15 and a convex piece 16, and the groove 15 and the convex piece 16 of each core segment 11 are connected to form a series body. And those that can be freely rotated at the connecting portion.

When the core segments are wound around the series body 13, the number of divisions of the plurality of core segments greatly affects the controllability of the winding. FIG. 6 shows a case where the core segment series body 13 having the 12-part structure is wound. In a 12-piece body or the like, as compared with a 4-piece body or a 6-piece body, since the interval between the connected core segments 11 is small, it is difficult to control the winding using space. Further, the stacking thickness of the core also affects the controllability of the winding, and the thicker the thickness, the more difficult it is to control, which is an obstacle to obtaining a high winding space factor.

As a method for winding the core segment series body 13 having the 12-split structure, a method of sequentially winding the coils of each phase one by one on each core segment 11 is usually used. In order to sequentially wind the phases in series,
The winding man-hour becomes longer.

[0006]

As described above, since the core segment series body having a large number of divisions has a small interval between the core segments, it is not possible to wind the winding even when the core segments are in a row. It was difficult. The present invention is capable of winding a coil at a high winding space factor on a high division body such as a 12-division body and a high winding difficulty such as a thick core lamination layer, and has a shorter winding time. An object of the present invention is to provide a method for manufacturing a stator that realizes a wire man-hour.

[0007]

According to the method of manufacturing a motor stator of the present invention, a winding is wound around a plurality of core segments to form a coil portion, and the winding is a crossover, and each core segment is provided with a winding. To form a core segment group for each winding phase, adjacent core segments are combined with core segments so that core segments belonging to other types of core segment groups are arranged, and an annular body is produced. Even with a stator with a large number of divisions, compared to the core segment series body,
A space for two or more core segments is secured between them, which makes it easy to control the winding and enables a winding with a high space factor.

Further, since each core segment group is separated, it is possible to simultaneously perform winding at another place, and it is possible to realize a shorter man-hour for winding.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a method for manufacturing a motor stator according to the present invention, a winding is wound around a plurality of core segments to form a coil portion. The core segments for each winding phase were formed as a group, and adjacent core segments were combined so that core segments belonging to other types of core segment groups were arranged to form an annular body. Can be provided with a sufficient area.

Further, according to the present invention, since the core segment group connects a plurality of core segments by a series of continuous windings, it is not necessary to connect each crossover later. Further, since the core segment is attached to the jig and the coil portion and the crossover portion are formed by the winding for each core segment group of the present invention, the winding can be easily fixed.

Furthermore, since only the core segment to be wound is projected so as not to affect the crossover between the coils and the coil is wound to form the core segment group, a free space can be left and right. It can be easily wound. Further, a plurality of core segments of the present invention may be connected to form a core segment serial body, and may be rounded to form an annular body.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) The upper diagram of FIG. 1 shows an embodiment in which the A, B, and C phases of the core segment group 12 for each winding phase are arranged in a straight line. In each phase, four core segments 11 are arranged at equal intervals separated by a space corresponding to two core segments, and the coils 20 are continuously wound in a linearly arranged state. Between each core segment 11, each coil 20
They are connected by a crossover 21 between them.

The core segment 11 is formed by laminating core sheets 10 and has a concave groove 15 and a convex piece 16 on both surfaces thereof. A phase, B around which the coil 20 is wound
The phase and the C phase are combined with each other to form a single-line core segment series body 13, and the concave pieces 15 a of the A-phase core segment are inserted into the convex pieces 1 of the B-phase core segment.
6b are connected. Similarly, the convex groove 16c of the C-phase core segment is inserted into the concave groove 15b of the B-phase core segment.
Are linked. Similarly, the convex piece 16a of the A-phase core segment is connected to the concave groove 15c of the C-phase core segment.

As described above, the phase A core segment 11a
In between, the B-phase and C-phase core segments 11b and 11c are respectively combined to form a series of core segment series bodies 1
Constituting No. 3. The lower diagram of FIG. 1 shows this core segment series body 13, in which twelve core segments 11 are connected to each other in a straight line, and coil ends 2
2a, 22b and 22c extend.

(Embodiment 2) FIGS. 4 and 5 show an embodiment in which four core segments 11 of each phase are wound at a distance of at least the space corresponding to the two core segments. Said A
When a coil is wound around each of the core segments 11 of the three phases, the B phase and the C phase, the core segment 11 is attached to a predetermined jig.
Since they are only connected by one, the position of the adjacent core segment 11 can be changed. For example, FIG.
As shown in (2), the mounting pitch of each core segment 11 is enlarged to a predetermined pitch or more, and the core segment 11 is mounted and wound, so that a wider space for controlling the winding can be secured. As shown in FIG. 5, a core segment 1 wound at the time of winding is used.
It is also possible to project and wind only one by a mounting jig. Thereby, the core segment 11 to be wound is
Can be secured as a space where the winding can be completely controlled.

However, when the core segments are separated by more than the predetermined pitch, the amount of movement is set to such an extent as not to affect the crossover at the time of manufacturing the stator, such as the crossover at the time of manufacturing the annular body.

[0017]

As described above, according to the first and second aspects of the present invention, a space for two core segments can be ensured between the core segments to be wound, and the winding can be controlled, so that a high space factor is obtained. Rate winding can be realized. In addition, since each winding phase-specific core segment group is separated, winding can be performed simultaneously in another place, and a shorter winding man-hour can be realized.

Furthermore, according to the third aspect of the present invention, there is no need to connect the crossovers, so that the number of assembly steps is reduced, and since there is no connecting portion between the crossovers, the motor can be downsized. Further, according to the invention as set forth in claim 4, a wider space can be secured between the core segments to be wound, and the winding of a winding component having a higher degree of difficulty is controlled, and the winding with a higher space factor is performed. Can be realized.

Further, according to the fifth aspect of the present invention, winding is further facilitated. Further, according to the invention of claim 6, the stator of the electric motor can be easily assembled.

[Brief description of the drawings]

FIG. 1 is a diagram showing a manufacturing process of a motor stator according to the present invention.

FIG. 2 is a diagram showing a conventional integrated core laminate.

3A is a perspective view of the core sheet, FIG. 3B is a perspective view of the core segment, and FIG.

FIG. 4 is a diagram showing a winding device in which the mounting pitch of the present invention is enlarged.

FIG. 5 is a diagram showing a winding in which only a core segment to be wound is projected.

6A is a view showing a conventional core segment serial body, and FIG. 6B is a view showing an annular body of the core segment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Core sheet 11 Core segment 12 Core segment group 13 Core segment series body 14 Connection 15 Concave groove 16 Convex piece 20 Coil 21 Crossover 22 Coil end wire 30 Flyer

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshihiro Takinami 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] A winding is wound around a plurality of core segments to form a coil portion, and the winding is a crossover, and the core segments are connected to form a core segment group for each winding phase. A method for manufacturing a motor stator in which an annular body is formed by combining core segments such that adjacent core segments are arranged with core segments belonging to another type of core segment group. 2. An annular body is produced by combining core segment groups for each of three types of winding phases such that adjacent core segments are arranged with core segments belonging to different types of core segment groups having different left and right sides. A method for manufacturing the motor stator according to the above. 3. The method according to claim 1, wherein the core segment group connects a plurality of core segments by a series of continuous windings. 4. The method for manufacturing a motor stator according to claim 1, wherein the core segments are attached to a jig for each core segment group, and a coil portion and a crossover portion are formed by winding. 5. A core segment group is formed by winding a coil by projecting only a core segment to be wound.
A method for manufacturing the motor stator according to the above. 6. The method for manufacturing a motor stator according to claim 1, wherein a plurality of core segments are connected to form a core-segment series body, which is then rounded into an annular body.