JPH07177715A - Capacitor induction motor - Google Patents

Abstract

PURPOSE:To obtain a capacitor induction motor wherein a stator core is so formed that the length of a stator winding is made as small as possible, protrusion of a coil end of the winding is suppressed and the dimension in the axial direction of the motor is reduced, regarding a winding structure of a capacitor induction motor of 8 slots and 2 poles. CONSTITUTION:Teeth parts projecting from the inner periphery of a stator core 1 are constructed of ones of a virtually reverse-U-shaped type 4, a virtually I-shaped type 5 and a virtually U-shaped type 6 which project from a yoke part 2 and have groove parts 7 provided at the fore ends respectively, and they are arranged in the sequence of the virtually reverse-U-shaped type, the virtually I-shaped type, the virtually U-shaped type and the virtually I-shaped type along the inner periphery of the stator core 1. An outside winding 8 is wound between the outside groove parts of base end parts 3 of the teeth parts of the virtually reverse-U-shaped type and the virtually U-shaped type, while an inside winding 9 is wound between the inside groove parts of the teeth parts of the virtually U-shaped and the virtually reverse-U-shaped type.

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 stator core structure and a stator winding method.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a stator core of an eight-slot, two-pole capacitor induction motor has eight substantially I-shapes radially protruding toward the inner circumference of the stator core. In the state where the teeth are formed and laminated in a predetermined stacking thickness, the inside of the slot is insulated with insulating paper or the like, and as shown in FIG. Abbreviation I
The outer winding is wound with the letter-shaped teeth sandwiched therebetween, and the inner winding is wound with three substantially I-shaped teeth sandwiched on the inner circumference side by shifting two slots to form a stator. I am trying. in this case,
The length of the coil of the outer winding is 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, and also the amount of copper wire used. Not only is there a problem that the primary resistance of the winding increases and the performance of the motor is degraded, but also the shaping and binding work of the winding hinder the winding process, and the coil end becomes large and the motor There is also a problem that the size in the axial direction becomes large.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art, and to improve the performance by narrowing the coil circumference of the winding and shortening the length of the stator winding. At the same time, another object of the present invention is 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 tooth portions projecting inwardly from the yoke portion forming the slot are formed in an inverted U-shape, an I-shape and a U-shape. There are three types, and they are arranged in a clockwise direction along the inner circumference of the stator core in the order of approximately U-shape, approximately I-shape, reverse approximately U-shape, and approximately I-shape in a circular shape, and the left side has a reverse shape. The first combination in which a U-shape, a substantially I-shape in the center, and a substantially U-shape in the right side are arranged, and a substantially U-shape in the left side, a substantially I-shape in the center, and an inverted substantially U-shape in the right side are arranged. The second combination is divided into the second combination, and the outer winding is wound between the groove portions near the outer circumference of the base end portions of the inverted substantially U-shaped and substantially U-shaped teeth of the first combination, and then the second combination. The inner winding is wound between the grooves near the inner circumference of the substantially U-shape and the reverse U-shape.

[0005]

According to the above construction, the tooth portions projecting inward from the yoke portion forming the slot are formed into three types, that is, an inverted substantially U-shape, a substantially I-shape and a substantially U-shape, respectively, and the stator Around the inner circumference of the iron core, they are arranged in a circular shape in the order of a substantially U-shape, a substantially I-shape, an inverted substantially U-shape, and a substantially I-shape. Divided into a first combination with an I-shape and a substantially U-shape on the right side, and a second combination with a substantially U-shape on the left side, a substantially I-shape in the center, and an inverted substantially U-shape on the right side. , An outer winding is wound between the grooves near the outer circumference of the base end of the inverted substantially U-shaped teeth and the substantially U-shaped teeth of the first combination, and then the reverse of the substantially U-shaped of the second combination. A two-pole stator winding is formed by winding an inner winding between groove portions near the inner circumference of the substantially U-shape.

[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 the teeth of the stator core 1 have an inverted substantially U-shape 4 in which the teeth protruding inward from a yoke part 2 forming a groove 6 are formed. It is made up of three types: a substantially I-shaped 5 and a substantially U-shaped 6, and the substantially U-shaped 6, the substantially I-shaped 5, the inverted substantially U-shaped 4, and the substantially I are formed in a clockwise direction along the inner circumference of the stator core. 8 teeth are arranged by arranging in a circular shape in the order of the character 5, and the widths of the teeth of the inverted substantially U-shaped 4, the substantially I-shaped 5 and the substantially U-shaped 6 are made equal. In this way, the density of the magnetic flux flowing through each tooth is made uniform to form a uniform magnetic pole.

FIG. 2 shows a state in which a stator winding is wound around the stator core of the present invention. The slots of the laminated stator core 1 except for the outer periphery are insulated, and the slots of the stator core 1 are reversely arranged on the left side. The first with a letter-shaped 4, a substantially I-shaped 5 in the center, and a generally U-shaped 6 on the right
And a second combination in which a substantially U-shaped 6 on the left side, an approximately I-shaped 5 at the center, and an inverted substantially U-shaped 4 on the right side are arranged. And the outer winding 8 between the groove portions 7 near the outer periphery of the base end portion 3 of the tooth portion of the substantially U-shape 6.
Then, the inner winding 9 is wound between the groove portions 7 close to the inner circumference of the second combination of the substantially U-shaped 6 and the inverted substantially U-shaped 4 to fix the 8-slot 2 poles. I try to form a child. 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 portions projecting inward from the yoke portion of the stator core have three types of shapes, that is, an inverted substantially U-shape, a substantially I-shape, and a substantially U-shape. And, along the inner circumference of the stator core, they are arranged in a circular shape in the order of a substantially U-shape, a substantially I-shape, a reverse substantially U-shape, and a substantially I-shape in a clockwise direction, and an inverted substantially U-shape is provided on the left side. , A first combination having a substantially I-shape in the center and a substantially U-shape on the right side, and a second combination having a substantially U-shape on the left side, a substantially I-shape at the center, and an inverted substantially U-shape on the right side An outer winding is wound between the grooves near the outer circumference of the base end of the inverted substantially U-shaped and substantially U-shaped teeth of the first combination, and then the second combination of the substantially U-shaped. By winding the inner winding between the grooves near the inner circumference of the U-shape and the inverted U-shape, the storability of the stator winding is improved, and the coil circumference of each winding is shortened to reduce the copper wire length. Reduce usage To together, to improve the characteristics of the induction motor to lower the primary resistance of the windings, by suppressing the protrusion of the coil end, you are possible to shorten the axial size of the induction motor.

[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 iron core 2 Yoke part 3 Teeth base end 4 Inverted U-shape 5 Almost I-shaped 6 Almost U-shaped 7 Groove 8 Outer winding 9 Inner winding

Front Page Continuation (72) Inventor Koji Mori 1116 Suenaga, Takatsu-ku, Kawasaki City, Fujitsu General Limited (72) Inventor Yuji Soma 1116 Suenaga, Takatsu-ku, Kawasaki City (72) Inventor, Narita Kenji Kawasaki City Takatsu-ku 1116 Suenaga Inside Fujitsu General Limited

Claims (2)

[Claims] 1. A capacitor induction motor in which eight slots are formed inside a stator core, and two-pole stator windings are wound in the slots, the inside of a yoke portion forming the slots. There are three types of teeth protruding inward, that is, a reverse U-shape, a substantially I-shape, and a substantially U-shape, and the U-shape and the I-shape are clockwise along the inner circumference of the stator core. , A first combination in which a reverse substantially U-shape and a substantially I-shape are circumferentially arranged, and a reverse substantially U-shape is arranged on the left side, a substantially I-shape is arranged at the center, and a substantially U-shape is arranged on the right side, It is divided into a second combination in which the left side is a substantially U-shape, the center is a substantially I-shape, and the right side is an inverted substantially U-shape.
The outer winding is wound between the groove portions near the outer circumference of the base end portions of the inverted substantially U-shaped and substantially U-shaped teeth of the combination of
An inner winding is wound between the groove portions near the inner circumference of the substantially U-shaped and the reverse substantially U-shaped combination of the above. 2. The tooth portion forming the slot is subjected to an insulating treatment so that the outer winding and the inner winding are wound in this order through the slot opening. Capacitor induction motor.