JPH06351200A - Capacitor motor - Google Patents

Abstract

PURPOSE:To shorten the circumferential length of a coil and the length of a stator coil, to increase the performance, to eliminate a job such as binding, and to reduce the axial size by winding the stator coil between recess sections of a reverse-S-shaped tooth and an S-shaped tooth of a stator iron core and another coil between recess sections of an S-shaped tooth and a reverse-S-shaped tooth. CONSTITUTION:Through an opening of an inner-side slot, a first outside coil 7 is wound between recesses 4 which are formed in an external side of a reverse-S-shaped tooth 6 and an S-shaped tooth 5 and which are opened in opposite directions, with the teeth of a first combination, reverse-S-shape 6 and I-shape 3 and S-shape 5, put between, and a second outside coil 8 is wound between recesses 4 of a reverse-S-shaped tooth 6 and an S-shaped tooth 5, which are located outside the ones the first outside coil 7 is wound. Then, with teeth of a second combination, S-shape 5 and I-shape 3 and reverse-S-shape 6, put between, a first inside coil 9 is wound between recesses 4 which are formed in an internal side of an S-shaped tooth 5 and a reverse-S-shaped tooth 6 and which are opened in opposite directions, and a second inside coil 10 is wound in recesses 4 of an S-shaped tooth 5 and a reverse-S-shaped tooth 6 which are located outside the ones the first inside coil 9 is wound. Thus, a 24-slot and 4-pole stator is formed.

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 teeth protruding radially toward the inside of the stator core. Insulation process is carried out in the state of being formed and laminated in a predetermined laminated thickness, and the first outer winding is sandwiched by the three I-shaped teeth of the stator core as shown in FIG. The second outer winding is wound around the five I-shaped teeth so that they overlap with each other, and is wound around the outer peripheral side by passing between the tips of the teeth, and further, three slots (45 ° in angle) in the circumferential direction. Similarly, inside the shifted position, the first inner winding is sandwiched by three I-shaped teeth, and the second inner winding is sandwiched by five I-shaped teeth so as to overlap therewith. The stator is constructed by 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 binding yarn, there are many shaping and binding operations, which is an obstacle to automation of the winding process. In addition, the coil circumference is longer as it is closer to the outer circumference of the stator core, and the length of the winding is increased due to overlapping windings, the amount of copper wire used increases, and the primary resistance increases and the performance of the motor deteriorates. However, there is a problem that 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 inwardly projecting tooth portion forming the slot has a shape I
It consists of three types, S-shaped and reverse S-shaped, respectively, together with the S-shaped and the yoke part. The I-shaped is the center and the reverse S-shaped is arranged on the left and the S-shaped is arranged on the right. The first combination and the second combination with the S shape on the left side and the inverted S shape on the right side centered on the I shape are arranged so as to be alternately located on the inner circumference, and the first combination I A first outer winding is sandwiched between the inverted S-shaped groove and the S-shaped groove on both sides of the character shape, and an outer inverted S-shaped wire and an S-shaped outer wire are formed on the first outer winding.
The second outer winding is wound between the groove portions of the character shape, and the first inner winding is further interposed between the inner S-shaped groove portion and the inverted S-shaped groove portion by sandwiching the second combination I shape. The outer S-shape and the reverse S on it
The second inner winding was wound between the V-shaped groove portions.

[0005]

According to the above construction, the tooth shape of the stator core is composed of three types of I-shape, S-shape and inverted S-shape,
The first combination with the I-shaped centered on the left side and the inverted S-shaped type on the right side and the S-shaped type on the right side, and the second combination with the I-shaped centered on the left side and the S-shaped type on the right side By alternately arranging the combinations of the above in a circle and passing through the opening inside the slot,
A first outer winding is provided between the inner reverse S-shaped and S-shaped grooves sandwiching the first combination I-shaped, and a second outer winding is provided between the outer inverted S-shaped and S-shaped grooves. A winding is wound, and a first inner winding is provided between the inner S-shaped groove and the inverted S-shaped groove of the second combination, and a first inner winding is provided between the outer S-shaped groove and the inverted S-shaped groove. By winding two inner windings, a stator winding with 24 slots and 4 poles is formed. As described above, by winding the stator winding between the reverse S-shaped and S-shaped groove portions of the stator core and between the S-shaped and reverse S-shaped groove portions, By shortening the coil length and winding it between the groove portions, it is possible to prevent the winding wire from protruding during the work, and it is possible to omit the binding operation using the bind yarn to adjust the shape of the winding wire.

[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. It is composed of three types: an inverted S-shaped 6 having a groove 4 formed on the inside and a groove 4 opened to the right on the inner peripheral side.
With the first combination in which the reverse S-shape 6 is arranged on the left and the S-shape 5 on the right, and the S-shape 5 is arranged on the left centering on the I-shape 3 and the reverse S-shape 6 is arranged on the right. The second combination is alternately arranged circumferentially along the inner circumference to form the stator core 1 of 24 slots. Further, the widths of the tooth portions of the S-shape 5 and the inverted S-shape 6 are made equal to the width of the I-shape 3, so that the density of the magnetic flux flowing through each tooth portion is made uniform and the I-shape 3 is formed. A uniform magnetic pole is formed at the center.

FIG. 2 shows a state in which a stator winding is wound around a stator core of the present invention, and the first combination of inverted S-shape 6, I-shape 3, S through the opening of the inner slot. The reverse S-shaped 6 and the groove 4 formed on the outer peripheral side of the S-shaped 5 sandwiching the tooth portion of the V-shaped 5 and opened in opposite directions are first wound by the winding machine.
The outer winding 7 is wound with the second outer winding 8 between the outer S-shaped 6 and the groove 4 of the S-shaped 5, and then the second combination S-shaped 5, I-shaped. The first inner winding 9 is provided between the groove portions 4 formed on the inner peripheral side of the S-shaped die 5 and the inverted S-shaped die 6 so as to sandwich the tooth portions of the die 3 and the inverted S-shaped die 6 and open in opposite directions. The second inner winding 10 is wound between the groove portions 4 of the outer S-shape 5 and the inverted S-shape 6 to form a 24-slot 4-pole stator. By winding the stator windings as described above, the first outer winding 7, the second outer winding 8, the first inner winding 9, and the second inner winding 10 are all stator cores. It is wound in close contact with No. 1 to prevent the excess coil end from protruding and shorten the length of the winding. It is also possible to shorten the axial dimension after winding, Therefore, the manual work for binding can be omitted.

[0008]

As described above, according to the present invention, the tooth portion of the tooth core has three shapes, that is, an inverted S-shape, an I-shape, and an S-shape. The first combination in which the S-shape is arranged on the right side and the second combination in which the S-shape is arranged on the left side and the S-shape is arranged on the right side centering on the I-shape are alternately arranged on the inner circumference. The tooth portion of 24 slots, and the first combination of the inverted S-shape and S-shape, and the outside S-shape and S-shape outside thereof.
The outer winding is wound between the grooves near the outer circumference of the character shape, and the inner winding is wound between the second combination of the S-shape and the inverted S-shape, and the groove near the inner circumference of the second fixed shape. The storage capacity of the child 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 lowered to improve the characteristics of the induction motor and the coil end sticks out. By keeping the value low, the size of the induction motor in the axial direction 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 iron core 2 Yoke part 3 I-shape 4 Groove part 5 S-shape 6 Reverse S-shape 7 First outer winding 8 Second outer winding 9 First inner winding 10 Second inner winding line

 ─────────────────────────────────────────────────── ─── 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 City Within Fujitsu General Limited

Claims (2)

[Claims] 1. A capacitor induction motor in which 24 slots are formed inside a stator core, and a 4-pole stator winding is wound in the slots, and teeth protruding inward are formed in the slots. The shape of the part is I-shaped, and it is composed of three types, S-shaped and inverted S-shaped, respectively, together with the yoke part, with the I-shaped centered on the left side and the inverted S-shaped on the right side. The first combination having the I-shape and the second combination having the S-shape on the left side and the S-shape on the right side centering on the I-shape are arranged so as to be alternately located on the inner circumference. A first outer winding is sandwiched between the reverse S-shaped and S-shaped grooves on the inner side of the I-shaped combination of 1, and a second outer winding is provided on the second outer winding between the reverse S-shaped and S-shaped grooves.
Outer winding is wound, and the first combination of the inner winding is provided between the inner S-shaped groove and the reverse S-shaped groove with the second combination of I-shaped being sandwiched, and the outer S-shaped is formed on the first inner winding. And second between the inverted S-shaped groove
A capacitor induction motor characterized in that the inner winding of the coil is wound. 2. A first outer winding, a second outer winding, a first inner winding, and a second inner winding are formed by subjecting each tooth forming the slot to an insulation treatment and passing through an opening of the slot. The capacitor induction motor according to claim 1, wherein the windings are wound in this order.