JPH0775307A - Capacitor motor - Google Patents

Abstract

PURPOSE:To reduce the length of a stator winding and size in the axial direction, and to eliminate the need for work such as bind by winding an external winding on a coupling tooth section on the outside through an internal slot opening section and an internal winding between adjacent U-shaped and inverted U-shaped tooth sections centering around an I-shaped tooth section respectively. CONSTITUTION:Sixteen slots are formed inside a stator winding 1, and stator windings having four poles are wound in the slots. The tooth section of the stator core 1 is formed in a shape that coupling tooth sections 5 having short I-shaped tooth sections 2 and inverted U-shaped tooth sections 3 and U-shaped tooth sections 4, in which groove sections extended bilaterally symmetrically are formed at centers, at front ends and I-shaped tooth sections 6 are projected radially to the inside of a yoke section 7 alternately. External windings 8 are wound on each coupling tooth section 5 through internal slot opening sections in the stator core 1, and internal windings 9 are wound among the adjacent U-shaped tooth sections 4 and inverted U-shaped tooth sections 3 while holding the I-shaped tooth sections 6. Accordingly, the coil perimeter of the windings is shortend, and the usage of copper wires is reduced while the primary resistance of the windings is lowered.

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 16-slot four-pole capacitor induction motor has 16 I's radially inwardly projected on the inner circumference of the stator core.
Insulating the inside of the slot with insulating paper etc. in the state where the V-shaped tooth portion is formed and laminated in a predetermined laminated thickness, and sandwiching the three I-shaped tooth portions on the outer peripheral side from the inside to the gap between the tooth tips. The outer winding is arranged at four places between the slots and the inner winding is displaced by two slots from the outer winding, and four inner windings are wound in the same manner to form a stator. In this case, the coil length of the outer winding is longer than the coil length of the inner winding,
It is necessary to arrange the shape of the winding by combining the shape of the coil with the bind thread, and the amount of copper wire used is large, so that the primary resistance of the winding is increased and the performance of the motor is deteriorated. However, there is a problem in that the shaping work and the binding work of the winding hinder the winding process, the coil end becomes large, and the size of the 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-mentioned object, the shape of a tooth portion that protrudes inward from a yoke portion that forms a slot has a coupling tooth portion that projects from the yoke portion, and the coupling tooth portion. A short I-shaped tooth portion that protrudes through the space to partition the gap between the inner windings, and an inverted U-shaped tooth portion that extends from the coupling tooth portion and has a groove portion that extends symmetrically around the short I-shaped tooth portion and The U-shaped teeth and the long I-shaped teeth that separate the poles of the outer winding are sequentially arranged along the inner circumference, and the outer winding is connected to the outer connecting tooth through the inner slot opening and the inner winding Inner windings are respectively wound between the U-shaped teeth and the inverted U-shaped teeth that are adjacent to each other around the long I-shaped teeth. Further, the width of the coupling tooth portion forming the slot is set to be twice or more the width of the other tooth portion, and each tooth portion is subjected to an insulation treatment, and the outer winding is wound on the coupling tooth portion through the slot opening. The inner winding is wound between the U-shaped tooth portion and the inverted U-shaped tooth portion which are adjacent to each other with the long I-shaped tooth portion inside.

[0005]

According to the above construction, the tooth shape of the stator iron core has a coupling tooth portion projecting from the yoke portion, and a short I-shaped portion projecting through the coupling tooth portion and partitioning the poles of the inner winding. The tooth portion and the inverted U-shaped tooth portion and the U-shaped tooth portion each having a groove extending laterally symmetrically around the short I-shaped tooth portion extending from the connecting tooth portion are separated from the outer winding pole by a long distance. I-shaped teeth are sequentially arranged along the inner circumference, the outer winding is passed through the inner slot opening, the outer winding is provided, and the inner I-shaped teeth are adjacent to each other, and the adjacent U-shaped teeth are provided. The length of the winding can be shortened by winding the inner winding between the coil section and the inverted U-shaped tooth section, preventing the winding from slipping inward or protruding and the coil end. It is possible to reduce the excessive protrusion of and reduce the axial dimension of the electric motor.

[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, in which a tooth portion of the stator core 1 has a short I-shaped tooth portion 2 and a groove portion extending symmetrically around the short I-shaped tooth portion 2 at the tip thereof. Connecting tooth portion 5 including inverted U-shaped tooth portion 3 and U-shaped tooth portion 4 to be formed
And the long I-shaped tooth portions 6 are alternately and radially projected inside the yoke portion 7, and the short I-shaped tooth portion 2, the inverted U-shaped tooth portion 3 and the U-shaped tooth portion 4, and the long I-shaped tooth portion 4 are long. The width of each tooth portion of the I-shaped tooth portion 6 is made equal, and the width of the coupling tooth portion 5 is almost doubled so that the density of the magnetic flux flowing through each tooth portion is made uniform and a uniform magnetic pole is formed. I am trying to do it.

FIG. 2 shows a state in which the stator windings are wound around the stator core of the present invention. The stator core 1 is laminated and the groove portion except the outer periphery is insulated, and the inner slot openings are passed through the stator core 1. An outer winding 8 is wound around the coupling tooth portion 5 by a winding machine, and then a long I-shaped tooth portion 6 is sandwiched between adjacent U-shaped tooth portions 4.
The inner winding 9 is wound between the inverted U-shaped teeth 3. By winding the stator windings as described above, both the outer winding 8 and the inner winding 9 are wound in close contact with the stator core 1 to prevent extra coil end protrusion and length of the winding. It is possible to make the length as short as possible, and to shorten the axial dimension after winding, and to omit the manual work of binding for coil end molding.

[0008]

As described above, according to the present invention, the tooth shape of the stator core is divided into the coupling tooth portion projecting from the yoke portion and the pole of the inner winding protruding through the coupling tooth portion. Short I
Between the U-shaped tooth portion, the inverted U-shaped tooth portion and the U-shaped tooth portion that are formed by extending from the connecting tooth portion and having a groove that extends symmetrically around the short I-shaped tooth portion, and between the poles of the outer winding. A long I-shaped tooth portion for partitioning is arranged in sequence along the inner circumference, insulation treatment is applied to the groove portion excluding the outer circumference, and an outer winding is formed on the outer coupling tooth portion.
The inner winding is wound between the U-shaped teeth and the inverted U-shaped teeth that are adjacent to each other with the long I-shaped teeth sandwiched inside to improve the storability of the stator windings and to wind each winding. The coil circumference of the wire is shortened to reduce the amount of copper wire used, the primary resistance of the winding is lowered to improve the characteristics of the induction motor, and the protrusion of the coil end is kept low to reduce the axial direction of the induction motor. The size 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 and a plan view showing a state in which a winding is wound around the stator core.

[Explanation of symbols]

 1 Stator Iron Core 2 Short I-shaped Tooth 3 Inverted U-shaped Tooth 4 U-shaped Tooth 5 Joint Tooth 6 Long I-shaped Tooth 7 Yoke 8 Outer Winding 9 Inner Winding

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Kawai 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General Ltd. (72) Inventor Koji Mori 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General (72) Inventor Yuji Soma 1116 Suenaga, Takatsu-ku, Kawasaki-shi In Fujitsu General Limited

Claims (3)

[Claims] 1. A capacitor induction motor in which 16 slots are formed inside a stator core, and stator windings having 4 poles are wound in the slots, the inside of a yoke portion forming the slots. A tooth portion projecting from the yoke portion, a short I-shaped tooth portion projecting through the tooth portion and partitioning the poles of the inner winding, and a short tooth extending from the tooth portion. An inverted U-shaped tooth portion and a U-shaped tooth portion in which a groove portion that spreads symmetrically around the I-shaped tooth portion is formed, and a long I-shaped tooth portion that partitions the poles of the outer winding are sequentially arranged on the inner circumference. The outer windings on the outer connecting teeth through the inner slot openings.
A capacitor induction motor, wherein inner windings are respectively wound between a U-shaped tooth portion and an inverted U-shaped tooth portion which are adjacent to each other centering on a long I-shaped tooth portion inside. 2. The capacitor induction motor according to claim 1, wherein the width of the coupling tooth portion forming the slot is twice or more the width of the other tooth portion. 3. The teeth forming the slot are respectively subjected to an insulation treatment, and the outer teeth are connected to the connecting teeth through the slot openings, and the long I-shaped teeth inside are adjacent to each other in U-shaped teeth. The capacitor induction motor according to claim 1, wherein an inner winding is wound between the portion and the inverted U-shaped tooth portion.