JPH06351199A - Capacitor motor - Google Patents

Abstract

PURPOSE:To shorten the circumferential length of a coil, to shorten the length of a stator coil, and to increase the performance by winding an outside coil between an outer part of a recess of a reverse-S-shaped tooth and an outer part of a recess of an S-shaped tooth with an I-shaped tooth put between and by winding an inside coil between an inner part of an S-shaped tooth and an inner part of a reverse-S-shaped tooth with an I-shaped tooth put between. CONSTITUTION:Teeth of a stator iron core 1 are formed into three types of shapes, S-shape 5 and I-shape 3 and reverse-S-shape 6, in accordance with the shape a yoke section 2. The I-shaped tooth 3, the S-shaped tooth 5, and the reverse-S-shaped tooth 6 are located clockwise in this order along the inner face of the yoke 2 and total 24 slots 7 are formed. Then, an outside coil 8 is wound between an outer part of a recess of a reverse-S-shaped tooth 6 and an outer part of a recess of an S-shaped tooth 5 with an I-shaped tooth 3 put between and an inside coil 9 is wound between an inner part of a recess of an S-shaped tooth 5 and an inner part of a recess of a reverse-S-shaped tooth 6. By this method, the circumferential length of the stator coil can be shortened. Furthermore, since the coil is wound in the recess sections 4 of the slots 7, unnecessary projection of an coil end is eliminated and the axial size of a motor can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capacitor induction motor, and more particularly to a structure of a stator core and a winding method of a stator winding.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a stator core of a 24-slot 6-pole capacitor induction motor has, as shown in FIG. 3, 24 tooth portions radially protruding inward from the inner circumference of the stator core. Then, insulation is applied to the whole in a laminated state with a predetermined stacking thickness, and as shown in FIG. 4, it is wound from the inside to the tip of the tooth part, and wound outside at six places between the slots with three tooth parts on the outer peripheral side. The wire is displaced from the outer winding by two slots on the inner peripheral side, and six inner windings are wound in the same manner to form a stator. In this case, the length of the coil of the outer winding becomes longer than the length of the coil of the inner winding, and it is necessary to arrange the shape of the coil by binding the coil shape together with the binding thread. Not only is the amount of use increased, the primary resistance of the winding increases and the performance of the motor deteriorates, but not only the winding shaping work and binding work hinder the winding process, the coil end And the size of the electric motor in the axial direction becomes large.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and improves the performance by narrowing the coil circumference of the winding to shorten the length of the stator winding. It is an object of the present invention to provide a capacitor induction motor that does not require manual work such as binding and has the axial dimension reduced as much as possible.

[0004]

In order to achieve the above object, the shape of the tooth portion forming the slot is combined with the yoke portion to form an I-shape, an S-shape, and an inverted S-shape, respectively. They are arranged in the order of clockwise, I-shaped, S-shaped, I-shaped, and inverted S-shaped so as to be positioned along the inner circumference. The outer winding is wound between the groove portions of the V-shape, and the inner winding is wound between the groove portions of the S-shape and the inverted S-shape that are close to the inner circumference with the I-shape interposed.

[0005]

According to the above construction, the shape of the tooth portion of the stator core is combined with the yoke portion into three types: S-shaped, I-shaped, and inverted S-shaped, and the clockwise I-shaped and S-shaped. 24 slots are formed by arranging in a circular shape in the order of letter-shaped, I-shaped, and inverted S-shaped, and the outer winding is wound between the inverted S-shaped and S-shaped grooves that are close to the outside with the I-shaped sandwiched. By winding the inner winding between the S-shaped groove and the inverted S-shaped groove near the inner circumference with the I-shape sandwiched therebetween, the circumferential length of the coil of the stator winding can be shortened and the winding can be shortened. By winding the wire in alignment with the groove of the slot, the winding is prevented from shifting inward and the winding does not stick out, and the extra protrusion of the coil end can be reduced and the axial dimension of the electric motor can be shortened.

[0006]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view of a stator core of the present invention. The teeth of the stator core 1 have an I-shape 3 radially protruding inward from the yoke section 2 and an S-shape together with the yoke section 2. S-shaped 5 having a groove portion 4 that is bent and opened to the right on the outer peripheral side and a groove portion 4 that is opened to the left on the inner peripheral side, and is bent in an inverted S shape together with the yoke portion 2 and is opened to the left on the outer peripheral side. The reverse S-shaped 6 having the groove 4 and the groove 4 opened to the right on the inner peripheral side is formed in the clockwise direction, and the clockwise I-shaped 3, S-shaped 5, I-shaped 3, reverse S-shaped 6 24 slots 7 are formed by arranging in a circular shape in this order. Further, the width of the tooth portion of the S-shaped 5 and the inverted S-shaped 6 is the I-shaped 3
The density of the magnetic flux flowing through each tooth is made uniform so as to form a uniform magnetic pole centered on the I-shape 3.

FIG. 2 shows a state in which a stator winding is wound around the stator core of the present invention, and an inverted S-shape 6, I-shape 3 and S-shape 5 are passed through the opening of the inner slot 7. Reverse S sandwiching the tooth
An outer winding 8 is wound by a winding machine between the groove portions 4 formed on the outer peripheral sides of the S-shape 6 and the S-shape 5 and opened in opposite directions, and then the S-shape 5, the I-shape 3, and the reverse S-shape. The inner winding 9 is wound between the groove portions 4 formed on the inner peripheral sides of the S-shaped die 5 and the inverted S-shaped die 6 with the tooth portions of the letter-shaped body 6 sandwiched therebetween and opened in opposite directions. By winding the stator winding as described above, both the outer winding 8 and the inner winding 9 are wound in close contact with the stator core 1, and the excess coil end is prevented from protruding and the length of the winding is reduced. In addition to shortening the length as much as possible, the axial dimension after winding can be shortened, and manual work for binding for coil end molding can be omitted.

[0008]

As described above, according to the present invention, the tooth portions of the tooth core have three shapes of I-shape, S-shape, and inverted S-shape, and clockwise I-shape and S-shape. , I-shape, and reverse S-shape are arranged in a circular shape in order, and the outer winding is wound outward from the I-shape as a center to the grooves of the reverse S-shape and S-shape, and the inner side is centered around the I-shape. By winding the inner winding over the S-shaped and inverted S-shaped grooves, the storability of the stator windings is improved, and the coil circumference of each winding is shortened to reduce the amount of copper wire used. By reducing the primary resistance of the winding and improving the characteristics of the induction motor while suppressing the protrusion of the coil end,
The axial size of the induction motor can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view of a stator core of the present invention.

FIG. 2 is a plan view showing a state in which a winding is wound around the stator core of the present invention.

FIG. 3 is a plan view of a conventional stator core.

FIG. 4 is a plan view showing a state in which a winding is wound around a conventional stator core.

[Explanation of symbols]

 1 Stator core 2 Yoke 3 I-shaped 4 Groove 5 S-shaped 6 Reverse S-shaped 7 Slot 8 Outer winding 9 Inner winding

Front page continuation (72) Inventor Yuji Kawai 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General Ltd. (72) Inventor Koji Mori 1116 Suenaga, Takatsu-ku, Kawasaki City (72) Inventor, Soma Yuji Kawasaki City Takatsu-ku 1116 Suenaga Inside Fujitsu General Limited

Claims (2)

[Claims] 1. A capacitor induction motor in which 24 slots are formed inside a stator core, and stator windings having 6 poles are wound in the slots, and a shape of a tooth portion forming the slot is formed. Combined with the yoke part, there are three types of I-shaped, S-shaped, and inverted S-shaped respectively, and the inner circumference is clockwise in the order of I-shaped, S-shaped, I-shaped, and inverted S-shaped. The outer winding is arranged between the inverted S-shaped groove close to the outer side and the groove portion of the S-shaped groove which are arranged so as to be located along the I-shape, and the S-shaped and inverted S-shape close to the inner circumference with the I-shaped groove. A capacitor induction motor, wherein inner windings are respectively wound between the V-shaped groove portions. 2. An outer winding is formed by applying an insulating treatment to each tooth forming the slot and passing through the slot opening.
The inner winding is wound in order, and the inner winding is wound.
The described capacitor induction motor.