JPH07184333A - Stator for electric motor - Google Patents

Abstract

PURPOSE:To reduce inferiority with winding work made efficient by inserting a bobbin of applying winding built annularly in a core piece formed by combining each pair of teeth and yokes of equal quantity to a number of slots of a stator. CONSTITUTION:Each pair of yokes l and teeth 2 is combined to fabricate a core piece 3 of equal quantity to a number of slots of a stator. A winding 5 is applied to a bobbin 11 before it is inserted into the core piece 3, and after the winding is completed, the bobbin 4, after it is inserted to the hoke l of the core piece 3, is annularly built. In this way, winding work is made efficient, and generating inferiority is reduced to improve a yield rate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor stator.

[0002]

2. Description of the Related Art In recent years, electric motors have been required to be thin, and in order to meet the demand, a toroidal winding method has been widely adopted as a winding method.

The stator of a conventional motor having a toroidal winding will be described below.

FIG. 4 is a plan view showing a stator of an electric motor provided with a conventional toroidal winding. In FIG.
7 is a stator core, 8a is a first slot, 8b is a second slot, and 9 is a winding.

With the above construction, the winding 9 is toroidally wound around the stator core 7 and is in the first slot 8a, and the winding 9 is continuously in the next second slot 8b and is toroidally wound around the stator core 7. Has been done. Less than,
Similarly, the winding 9 is wound around the adjacent slot.

[0006]

However, the above configuration has the following problems.

When the winding 9 is toroidally wound on the stator core 7, the winding 9 is wound from the first slot 8a to the second slot 8a.
Since the winding is continuous up to b, when the winding is carried out in the first slot 8a, the winding 9 is not spread over the second slot 8b. That is, the winding 9 can be wound only one slot at a time.

Further, since the winding is continuous for two slots or more, a crossover wire between the slots is required, which causes a defect.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide a stator of an electric motor in which winding efficiency is improved and defective rate is reduced.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a core piece is formed by combining a pair of teeth and yokes of the same number as the number of slots of a stator, and a bobbin having windings is inserted into the yoke of the core piece. Assemble in a ring.

[0011]

According to the present invention, the bobbin for a plurality of slots can be wound at a time, the winding work efficiency is improved, and the bobbin is inserted into the yoke of the core piece, and the bobbin is assembled into an annular shape. Since there is no winding crossover, defects can be reduced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an assembled state diagram of a core piece according to an embodiment of the present invention. 1 is a yoke, 2 is a tooth, 3 is a core piece, 4 is a bobbin, and 5 is a winding. The core piece 3 is composed of a pair of yokes 1 and teeth 2. The bobbin 4 is wound with the winding 5 before being inserted into the core piece 3, and is inserted into the yoke 1 of the core piece 3 after the winding is completed.

FIG. 2 is an assembly diagram of the stator. The core piece 3 having the bobbin 4 inserted therein is assembled into an annular shape to form a stator according to an embodiment of the present invention.

Alternatively, the integral bobbin 6 may be formed in advance on the core piece 3 as shown in FIG. 3, and the winding may be unwound.

[0016]

As described above, in the stator of the electric motor according to the present invention, a pair of yokes and teeth are combined to form a core piece, and a bobbin having a winding is inserted into the yoke of the core piece, and then the core piece is assembled into an annular shape. As a result, the winding work efficiency is improved and the winding defect can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing how a core piece is assembled in an embodiment of the present invention.

FIG. 2 is a stator assembly diagram in one embodiment of the present invention.

FIG. 3 is an assembled state diagram of a core piece according to an embodiment of the present invention.

FIG. 4 is a plan view of a conventional stator

[Explanation of symbols]

 1 yoke 2 teeth 3 core piece 4 bobbin 5 winding 6 integrated bobbin

Claims (2)

[Claims] 1. A stator for an electric motor comprising a core piece having a number of teeth and yokes, each having the same number of slots as the stator, and a bobbin having windings inserted into the yoke of the core piece. . 2. A stator for an electric motor according to claim 1, wherein a bobbin capable of winding is integrally formed on the yoke of the core piece, the winding is directly applied to the bobbin, and then the core piece is assembled in an annular shape.