JPH0775306A - Capacitor induction motor - Google Patents

Abstract

PURPOSE:To shorten the coil perimeter of windings and the length of stator windings, and to shorten size in the axial direction requiring no work such as bind by winding the stator windings among the groove sections of a stator core and shortening the coil length of the stator windings while successively winding windings among the specified groove sections. CONSTITUTION:Coupling tooth sections projected from a yoke section 2 to the inside, short I-shaped tooth sections 4, inverted U-shaped tooth sections and U-shaped tooth sections, in which groove sections are formed left and right, inverted S-shaped tooth sections and S-shaped tooth sections and long I-shaped tooth sections 9 are arranged successively along an inner circumference in the tooth section shape of a stator core I. External windings 10 are wound on the outside at three-slot pitches centering around coupling tooth sections 3 through the opening sections of slots on the inside, external windings 11 on the external windings 10 at five-slot pitches, internal windings 12 at three-slot pitches centering around I-shaped tooth sections 9 and internal windings 13 on the internal windings 12 at five-slot pitched, thus forming a stator having twenty-four slots and four poles.

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, a stator core of a 24-slot 4-pole capacitor induction motor has, as shown in FIG. 3, 24 I-shaped tooth portions radially protruding toward the inside of the stator core. After being formed and laminated in a predetermined laminated thickness, the inside of the slot is insulated with insulating paper or the like, and the first outer winding is sandwiched by the three I-shaped teeth of the stator core as shown in FIG. Line
2nd with 5 I-shaped teeth on top of it
The outer winding of the above is wound around the outer peripheral side by passing between the tips of the teeth, and is further wound by three slots (45 ° in angle). The stator is configured such that the first inner winding is sandwiched between the first inner winding and the second inner winding is wound so as to sandwich the five I-shaped tooth portions so as to overlap the first inner winding. In this case, the first and second outer windings are wound between the slots to shape the shape of the winding, and the first and second inner windings are further wound inside the winding to form the winding. Since the shape is adjusted and the shape of the winding is adjusted by the bind yarn,
There are many shaping and binding operations that hinder the automation of the winding process. In addition, the coil circumference of the winding becomes longer as it is closer to the outer circumference of the stator core, and the length of the winding increases due to overlapping winding, and the amount of copper wire used increases,
There are problems that the primary resistance increases and the performance of the electric motor deteriorates, the coil end becomes large due to the shaping of the winding, and the axial size of the electric motor becomes large.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and shortens the coil circumference of the winding to shorten the length of the stator winding to improve the performance. At the same time, it is an object of the present invention to provide a 24-slot 4-pole capacitor induction motor having a reduced axial dimension that does not require work such as binding.

[0004]

In order to achieve the above object, the shape of a tooth portion projecting inward from a yoke portion forming a slot is protruded through a coupling tooth portion to partition a gap between inner windings. Inverted U-shaped teeth and U-shaped teeth formed with I-shaped teeth and grooves extending from the connecting teeth and extending symmetrically around the short I-shape. Long I that separates the poles of the outer winding from the inverted S-shaped tooth portion that forms the inverted S-shaped portion by extending and forming the inverted S-shaped portion and the S-shaped tooth portion that forms the S-shaped portion Character-shaped are sequentially arranged along the inner circumference, and the first outer winding is wound around the coupling tooth portion in the outer groove portion at a 3-slot pitch, and the second outer winding is wound thereon at a 5-slot pitch. And the first inner winding with a long I-shaped tooth in the inner groove at a pitch of 3 slots and 5 slots on it. In pitch it was to wound the second inner winding. Further, the width of the connecting 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 insulating treatment, and the connecting tooth portion is provided in the outer groove portion through the slot opening. A first outer winding is wound around the center with a pitch of 3 slots, and a second outer winding is wound around it with a pitch of 5 slots. Further, a long I-shaped tooth portion is placed around the inner groove at a pitch of 3 slots. The first inner winding was wound on the second inner winding with a pitch of 5 slots.

[0005]

According to the above-mentioned structure, the tooth shape of the stator core is projected through the coupling tooth portion to partition the gap between the inner windings.
Inverted U-shaped and U-shaped teeth formed with a groove and a symmetrical I-shaped extending from the connecting tooth and a short I-shaped center, and the yoke that extends from the yoke to the outside left and right And an S-shaped tooth portion forming an S-shaped portion and an S-shaped tooth portion forming an S-shaped portion, and a long I-shaped portion that separates the poles of the outer winding by a relative position shift of 45 degrees. The first outer winding is arranged along the inner circumference, and through the opening on the inner side of the slot, the first outer winding is arranged in the outer groove portion around the coupling tooth portion at a 3-slot pitch, and the first outer winding is arranged thereon at a 5-slot pitch. The outer winding is wound, and the inner groove is further wound around the long I-shaped tooth portion with the first inner winding at a 3-slot pitch and the second inner winding at a 5-slot pitch. 24 slots by 4
It is designed to form pole stator windings. As described above, by winding the stator winding between the groove portions of the stator core, the coil length of the stator winding can be shortened, and the winding can be wound sequentially between the predetermined groove portions. The protrusion of the winding wire during the work can be prevented, and the binding operation using the bind yarn for adjusting the shape of the winding wire can be omitted.

[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 tooth shape of the stator core 1 is a connecting tooth portion 3 protruding inward from a yoke portion 2 and a short I-shape protruding from the connecting tooth portion 3. Tooth 4
And an inverted U-shaped tooth portion 5 and a U-shaped tooth portion 6 extending from the same connecting tooth portion 3 and forming a groove portion that widens to the left and right between the short I-shaped tooth portion 4 and the yoke portion 2. An inverted S-shaped tooth portion 7 forming an inverted S-shaped portion together with the yoke portion 2, an S-shaped tooth portion 8 forming an S-shaped portion, and a long I-shaped tooth portion protruding from the yoke portion 2. 9 are sequentially arranged along the inner circumference to form a stator core 1 of 24 slots. Further, the connecting tooth portion 3 is twice the width of the long I-shaped tooth portion 9 and the width of each tooth portion is made equal to the width of the long I-shaped tooth portion 9, so that the density of the magnetic flux flowing through each tooth portion is increased. Are 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 stator winding is wound through the opening of the inner slot, and the connecting tooth portion 3 is centered on the outer side by a winding machine at a pitch of 3 slots. The first outer winding 10 is wound with the second outer winding 11 at a pitch of 5 slots, and then the first inner winding is wound at an inner side of the long I-shaped tooth portion 9 at a pitch of 3 slots. Line 12
The second inner winding 13 having a 5-slot pitch is wound thereon, thereby forming a 24-slot 4-pole stator. By winding the stator winding as described above,
First outer winding 10, second outer winding 11, first inner winding
Both 12 and the second inner winding 13 are wound closely on the stator core 1 to prevent extra coil end protrusion and reduce the length of the 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 portion of the tooth core has the shape of the tooth portion that protrudes inward from the yoke portion 2, and the short I-shaped tooth portion that protrudes from the tooth portion. And a reverse U-shaped tooth portion and a U-shaped tooth portion that form a groove portion between the I-shaped tooth portion and a short I-shaped tooth portion that extends from the joint tooth portion, and an inverted S-shaped tooth portion that extends from the yoke portion, S-shaped teeth and long I-shaped teeth protruding from the yoke are sequentially arranged along the inner circumference to form 24 slots of teeth, and through the opening of the inner slot,
The first outer winding is wound on the outer side by a winding machine around the connecting tooth portion at a 3-slot pitch, and the second outer winding is placed on it by a 5-slot pitch.
The outer winding of the first winding, and then the first inner winding with a 3-slot pitch centered on the long I-shaped tooth portion on the inside, and 5
By winding the slot pitch second inner winding,
The capacity of the stator windings is improved, the coil circumference of each winding is shortened to reduce the amount of copper wire used, and the primary resistance of the winding is reduced to improve the characteristics of the induction motor and improve the coil end. By suppressing the protrusion to be low, the size of the induction motor in the axial direction can be shortened. In addition, insulation is applied to each side surface of the laminated stator core except the outer periphery,
By winding the stator winding, the work of inserting an insulating sheet or the like for protecting the stator winding can be omitted, and the efficiency of the winding work can be improved.

[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 Coupling tooth part 4 Short I-shaped tooth part 5 Inverted U-shaped tooth part 6 U-shaped tooth part 7 Inverted S-shaped tooth part 8 S-shaped tooth part 9 Long I-shaped part Teeth 10 First outer winding 11 Second outer winding 12 First inner winding 13 Second 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 24 slots are formed inside a stator core and a stator winding of 4 poles is wound in the slots, and an inner side is formed from a yoke portion forming the slot. A short I-shaped tooth portion projecting the shape of the tooth portion projecting inward through the coupling tooth portion to partition the poles of the inner winding,
Inverted U-shaped teeth and U-shaped teeth that extend from the connecting teeth and expand symmetrically around the short I-shape, and combine with the yoke that extends from the yoke to the outside left and right. To form an inverted S-shape and an S-shaped tooth that forms an S-shape, and a long I-shape that separates the poles of the outer winding by a relative position shift of 45 degrees. The first outer winding with a pitch of 3 slots around the coupling tooth, and the second outer winding with a pitch of 5 slots on the outer groove. And a second inner winding with a 5 slot pitch and a first inner winding with a 3 slot pitch centering on a long I-shaped tooth portion. Electric motor. 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 tooth portions forming the slots are subjected to an insulation treatment, and the first outer windings are arranged at a pitch of 3 slots and the second outer windings are arranged at a pitch of 5 slots through the openings of the slots. First inner winding with 3 slot pitch,
The capacitor induction motor according to claim 1, wherein the second inner winding is wound in this order at a 5-slot pitch.