JP3369362B2 - Capacitor induction motor - Google Patents

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, winding of a stator core in an inner winding type capacitor induction motor in which a winding is directly wound from the inside of the stator core to a tooth portion has been performed by a three-nozzle winding machine. FIG. 5 shows a winding state of the stator according to the winding method in this case on the crossover side of the stator of the 24-slot 6-pole capacitor induction motor.

As in FIG. 1, the tooth portions of the stator core 1 to the yoke portion 2 of the substantially I-shape 3 are provided at equal intervals. By providing symmetrical U-shaped teeth 4 and substantially inverted U-shaped tooth portions 5 on both sides from every other base end of the substantially I-shaped tooth portions, the substantially U-shaped and substantially inverted U-shaped tooth portions are provided. The inner groove 6a, the outer groove 6b, and the inner groove 6 are provided on the inner side and the outer side of the tooth portion, respectively.
c, the outer groove 6d is formed, and the stator slot 1 having 24 slots is formed.

FIG. 5 is a plan view showing a winding state of the stator in the winding system in this case, where one side of the stator is the connection side. Here, at least the tips of the teeth facing the rotor are removed, and the stator core is premolded with resin to cover the stator core, and the outer partition wall 7 is provided on the outer peripheral portion on the connection side.
a, an intermediate wall 7c between the outer groove and the inner groove, an inner partition wall 7b on the inner peripheral portion, and the substantially inverted U-shape or the substantially U-shape between the outer partition wall and the intermediate wall. A support wall 7d having right, center, and left support columns 7d3, 7d1, and 7d2 is integrally provided along the tooth portion so as to project.

Then, the outer winding 8a is wound between the outer groove and the next outer groove. Similarly, for other grooves, 8b, 8
c is wound to form an outer winding. Then, the lead wires AA ′, BB ′, CC ′ of the outer winding are led out from the connection side along the guide path of the pre-molded portion and fixed to the support column.

Next, the inner winding 9d is wound between the inner groove and the next inner groove. Similarly, 9e for other grooves,
The inner winding is formed by winding 9f. Then, the lead wires DD ′, EE ′, FF ′ of the inner winding are led out from the connection side along the guide path of the premolded portion and fixed to the support column.

Further, the end of the inner winding is arranged along the intermediate wall on the connection side, and the reduction winding 10g is wound on the inner winding so as to be superposed on the inner winding. Similarly, 10h for other grooves,
10i is wound and a deceleration winding is formed. Then, the lead wires GG ′, HH ′, and II ′ of the deceleration winding are led out from the connection side along the guide path of the premold portion and fixed to the support pillar. Thus, the stator is constructed.

In this case, when the reduction winding is introduced into the inner groove from the connection side, the end D'of the inner winding,
If E ′, F ′, etc. are deviated inward, there is a possibility that the deceleration winding may be cut by a nozzle when the deceleration winding is wound around the inner winding and wound, and the substantially I-shaped tooth portion This is a problem because it may come into contact with the corner portion of the base end and cause disconnection.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and prevents the disconnection of the terminal of the inner winding on the connection side of the capacitor induction motor and improves the reliability of the capacitor induction motor. The purpose is to provide an electric motor.

[0010]

In order to achieve the above object, substantially I-shaped tooth portions are provided at equal intervals from a yoke portion of a stator core, and every other one of the substantially I-shaped tooth portions is placed. Providing symmetrical U-shaped and inverted C-shaped teeth on both sides from the base end of the inner groove and outer groove of the same U-shaped and inverted C-shaped teeth, respectively. Forming at least the tips of the tooth portions facing the rotor, and pre-molding with resin to cover the stator core, and an outer partition wall on the outer peripheral portion on the connection side, and between the outer groove and the inner groove. An intermediate wall, an inner partition wall on the inner periphery, and between the outer partition wall and the intermediate wall, right, center, and left support columns along the substantially inverted U-shaped and substantially U-shaped tooth portions. Integrally forming a support wall having, and winding the outer winding between the outer groove and the next outer groove,
Then, the inner winding is wound between the inner groove and the next inner groove, the end of the inner winding is arranged along the intermediate wall on the connection side, and the reduction winding is wound by the inner winding. In a capacitor induction motor formed by winding a wire on a wire, a guide rib is integrally formed with a premold on the inner peripheral side of the center of the intermediate wall and above the substantially I-shaped tooth portion. And a gap that sandwiches the end of the inner winding is formed between the intermediate wall and the intermediate wall.

Alternatively, substantially I-shaped tooth portions are provided at equal intervals from the yoke portion of the stator iron core, and the substantially I-shaped tooth portions are symmetrical to each other on both sides from the base end of every other tooth portion. Providing a substantially inverted U-shaped tooth portion, an inner groove and an outer groove are formed inside and outside the substantially U-shaped and substantially inverted U-shaped tooth portions, respectively, and these grooves are formed on the connection side. An outer partition wall on an outer peripheral portion, an intermediate wall between the outer groove and the inner groove, an inner partition wall on an inner peripheral portion, and the substantially inverted U-shape and the substantially U-shape between the outer partition wall and the intermediate wall. An insulator having a guide wall for the winding formed by forming a support wall having right, center, and left support columns along the tooth portion of the mold is mounted, and the outer winding is moved from the outer groove to the next outer groove. And then winding the inner winding between the inner groove and the next inner groove, and arranging the end of the inner winding along the intermediate wall on the connection side. , Stack the deceleration winding on the inner winding In the installed capacitor induction motor, a guide rib is integrally provided on the inner peripheral side of the center of the intermediate wall of the insulator, above the tooth portion of the substantially I-shape, and between the guide rib and the intermediate wall. In addition, a gap that sandwiches the end of the inner winding is formed.

The corners of the gap are rounded. In addition, the height of the guide rib,
It is characterized in that it is formed substantially the same as the intermediate wall.

Alternatively, the guide rib is formed so as to be continuous with the inner partition wall above the substantially I-shaped tooth portion and gradually lower in height toward the outer periphery.

Further, the gap between the intermediate wall and the guide rib is formed to be substantially the same as the outer diameter of the inner winding. Further, a height of a gap between the intermediate wall and the guide rib is formed so that a lead wire of the inner winding does not come into contact with a base end of the substantially I-shaped tooth portion. To do.

[0015]

According to the above construction, substantially I-shaped tooth portions are provided at equal intervals from the yoke portion of the stator core, and the substantially I-shaped tooth portions are symmetrically arranged on both sides of the base end. A substantially U-shaped and a substantially inverted U-shaped tooth portion is provided, and an inner groove and an outer groove are formed inside and outside the substantially U-shaped and substantially inverted C-shaped tooth portions, respectively, and at least a rotor is provided. Except for the tips of the tooth portions facing each other, the stator core is pre-molded with resin to cover the stator core, an outer partition wall on the outer peripheral portion on the connection side, an intermediate wall between the outer groove and the inner groove, and an inner peripheral portion. A pre-molded support wall having an inner partition wall, an outer partition wall, and an intermediate wall, and having right, center, and left support columns along the substantially inverted U-shaped and substantially U-shaped tooth portions. Together with the outer winding, the outer winding is wound between the outer groove and the next outer groove, and then,
The inner winding is wound between the inner groove and the next inner groove, the end of the inner winding is arranged along the intermediate wall on the connection side, and the reduction winding is arranged on the inner winding. In a capacitor induction motor that is wound in a stack, a guide rib is integrally formed on the inner peripheral side of the center of the intermediate wall and above the substantially I-shaped tooth portion, and between the guide rib and the intermediate wall. A gap is formed between the ends of the inner winding.

Alternatively, substantially I-shaped tooth portions are provided at equal intervals from the yoke portion of the stator core, and the substantially I-shaped tooth portions are symmetrical to each other on both sides from the base end of every other tooth portion. Providing a substantially inverted U-shaped tooth portion, an inner groove and an outer groove are formed inside and outside the substantially U-shaped and substantially inverted U-shaped tooth portions, respectively, and these grooves are formed on the connection side. An outer partition wall on an outer peripheral portion, an intermediate wall between the outer groove and the inner groove, an inner partition wall on an inner peripheral portion, and the substantially inverted U-shape and the substantially U-shape between the outer partition wall and the intermediate wall. An insulator having a guide wall for the winding formed by forming a support wall having right, center, and left support columns along the tooth portion of the mold is mounted, and the outer winding is moved from the outer groove to the next outer groove. And then winding the inner winding between the inner groove and the next inner groove, and arranging the end of the inner winding along the intermediate wall on the connection side. , Stack the deceleration winding on the inner winding In the installed capacitor induction motor, a guide rib is integrally provided on the upper portion of the substantially I-shaped tooth portion on the inner peripheral side of the center of the intermediate wall of the insulator, and between the guide rib and the intermediate wall. In addition, a gap is formed to sandwich the end of the inner winding.

Then, R is attached to a corner portion of the gap, and the height of the guide rib is formed to be substantially equal to that of the intermediate wall, or the guide rib is formed above the substantially I-shaped tooth portion. Is formed so as to be continuous with the inner partition wall and gradually lower in height toward the outer periphery, and further, the gap between the intermediate wall and the guide rib is formed to be substantially the same as the outer diameter of the inner winding, and The height of the gap between the intermediate wall and the guide rib is formed so that the lead wire of the inner winding does not come into contact with the base end of the substantially I-shaped tooth portion. The end of the inner winding of the electric motor is fixed to the inside without slipping.

[0018]

Embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same parts as those in the conventional example have the same reference numerals. Embodiments of the present invention will be described in detail with reference to the accompanying drawings with respect to a 24-slot 6-pole capacitor induction motor.

FIG. 1 is a plan view of a stator core. The tooth portions of the substantially I-shaped 3 are provided at equal intervals from the yoke portion 2 of the stator core 1. By providing symmetrical U-shaped teeth 4 and substantially inverted U-shaped tooth portions 5 on both sides from every other base end of the substantially I-shaped tooth portions, the substantially U-shaped and substantially inverted U-shaped tooth portions are provided. Inner grooves 6 on the inside and outside of the teeth, respectively
a, the outer groove 6b, the inner groove 6c, and the outer groove 6d are formed.
The stator core 1 of the slot is formed.

FIG. 2 is a plan view showing a winding state of the stator in the winding system in this case, where one side of the stator is the connection side. Here, at least the tips of the tooth portions facing the rotor are removed, and the stator core is premolded with a resin to cover the stator core, and the outer partition wall 7a, the outer groove, and the inner groove of the connection side are formed. Between the intermediate wall 7c, the inner partition wall 7b on the inner peripheral portion, and the outer partition wall and the intermediate wall, right, center, left along the substantially inverted U-shaped and substantially U-shaped tooth portions. And a support wall 7d having support pillars 7d3, 7d1 and 7d2, and a guide rib 7f are integrally formed on the inner peripheral side of the center of the intermediate wall and above the substantially I-shaped tooth portion. A gap S sandwiching the end of the inner winding is formed between the intermediate walls.

Alternatively, an outer partition wall 7 is provided on the outer periphery of the connection side.
a, an intermediate wall 7c between the outer groove and the inner groove, an inner partition wall 7b on the inner peripheral portion, and the substantially inverted U-shape or the substantially U-shape between the outer partition wall and the intermediate wall. A support wall 7d having right, center, and left support columns 7d3, 7d1, and 7d2 along the tooth portion, and a guide rib 7f on the inner peripheral side of the center of the intermediate wall and above the substantially I-shaped tooth portion. Is integrally formed and a gap S sandwiching the end of the inner winding is formed between the guide rib and the intermediate wall to form a guide path for the winding (in the figure, the pre-mold portion 7 and (Not shown for the same shape) may be provided and the same insulator may be mounted in the groove.

Here, the outer winding 8a is wound between the outer groove 6d and the next outer groove 6b. Further, it is wound between the outer groove adjacent to the outer groove and the next outer groove. Similarly, another nozzle is used to wind around each groove to form each outer winding 8b, 8c. Then, the lead wires AA ′, BB ′, CC ′ of the outer winding are led out from the connection side along the guide path of the pre-molded portion and fixed to the support column.

On the other hand, next, the inner winding 9d is wound between the inner groove 6a and the next inner groove 6c. Here, the end of the inner winding 9d is arranged through the gap S between the intermediate wall 7c on the connection side and the guide rib 7f.

Similarly, the inner windings 9e and 9f are formed by winding the other windings in the respective grooves. Then, the lead wires DD ′, EE ′, FF ′ of the inner winding are led out from the connection side along the guide path of the premolded portion and fixed to the support column.

Further, the deceleration windings 10g, 10h, 10i are wound on the inner windings 9d, 9e, 9f so as to overlap each other. Then, the lead wires GG ′, HH ′, II ′ of the deceleration winding are led out from the connection side along the guide path of the premolded portion,
It is fixed to the support column. In this way 24 slots 6
It is designed to form a pole stator.

Then, as shown in FIG. 3, the corners of the gap S are rounded. Further, the height L of the guide rib is formed to be substantially equal to that of the intermediate wall.

Alternatively, as shown in FIG. 4, the guide rib 7f may be formed so as to be continuous with the inner partition wall at the upper part of the substantially I-shaped tooth portion and gradually lower in height toward the outer periphery. Good.

Further, the gap S between the intermediate wall and the guide rib is formed to be substantially the same as the outer diameter of the inner winding. Further, the height H of the gap between the intermediate wall and the guide rib is
The lead wire of the inner winding is formed so as not to contact the base ends of the substantially I-shaped tooth portions.

As a result, the end of the inner winding of the capacitor induction motor does not shift inward, and there is no risk of disconnection due to the nozzle during winding of the speed reduction winding. Since it does not contact the base end, reliability can be improved.

[0030]

As described above, according to the present invention, substantially I-shaped tooth portions are provided at equal intervals from the yoke portion of the stator core, and every other base end of the substantially I-shaped tooth portions is provided. By providing symmetrical U-shaped and inverted C-shaped teeth on both sides, an inner groove and an outer groove are formed inside and outside the same U-shaped and inverted C-shaped teeth, respectively. , At least excluding the tips of the tooth portions facing the rotor, premolding with resin to cover the stator core, an outer partition wall on the outer peripheral portion on the connection side, and an intermediate wall between the outer groove and the inner groove. And a support having an inner partition wall in the inner peripheral portion, and right, center, and left support columns between the outer partition wall and the intermediate wall along the substantially inverted U-shaped and substantially U-shaped tooth portions. The wall is integrally formed, the outer winding is wound between the outer groove and the next outer groove, and then the inner winding is wound between the inner groove and the next inner groove, and wiring is performed. Along the middle wall on the side , Disposed terminal of the inner winding,
In a capacitor induction motor formed by winding a reduction winding on the inner winding, the inner peripheral side of the center of the intermediate wall,
A guide rib is integrally formed with the pre-mold on the upper portion of the substantially I-shaped tooth portion, and a gap sandwiching the end of the inner winding is formed between the guide rib and the intermediate wall.

Alternatively, substantially I-shaped tooth portions are provided at equal intervals from the yoke portion of the stator iron core, and the substantially I-shaped tooth portions are symmetrically U-shaped on both sides from the base end of every other tooth portion. Providing a substantially inverted U-shaped tooth portion, an inner groove and an outer groove are formed inside and outside the substantially U-shaped and substantially inverted U-shaped tooth portions, respectively, and these grooves are formed on the connection side. An outer partition wall on an outer peripheral portion, an intermediate wall between the outer groove and the inner groove, an inner partition wall on an inner peripheral portion, and the substantially inverted U-shape and the substantially U-shape between the outer partition wall and the intermediate wall. An insulator having a guide wall for the winding formed by forming a support wall having right, center, and left support columns along the tooth portion of the mold is mounted, and the outer winding is moved from the outer groove to the next outer groove. And then winding the inner winding between the inner groove and the next inner groove, and arranging the end of the inner winding along the intermediate wall on the connection side. , Stack the deceleration winding on the inner winding In the installed capacitor induction motor, a guide rib is integrally provided on the inner peripheral side of the center of the intermediate wall of the insulator, above the tooth portion of the substantially I-shape, and between the guide rib and the intermediate wall. In addition, a gap is formed to sandwich the end of the inner winding.

R is attached to the corner of the gap, and the height of the guide rib is formed to be substantially equal to that of the intermediate wall, or the guide rib is formed above the substantially I-shaped tooth portion. Is formed so as to be continuous with the inner partition wall and gradually lower in height toward the outer periphery, and further, the gap between the intermediate wall and the guide rib is formed to be substantially the same as the outer diameter of the inner winding, and The height of the gap between the intermediate wall and the guide rib is formed so that the lead wire of the inner winding does not come into contact with the base end of the substantially I-shaped tooth portion. Since the end of the inner winding of the electric motor does not shift inward, there is no risk of disconnection due to the nozzle during winding of the speed reduction winding, and there is no contact with the base end of the substantially I-shaped tooth portion. Prevents disconnection at the end of the inner winding on the connection side of the motor. Can, it is possible to provide a capacitor induction motor with improved reliability.

[Brief description of drawings]

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

FIG. 2 is a plan view of an embodiment showing a winding state of a stator winding on a wire connection side according to the capacitor induction motor of the present invention.

FIG. 3 is a sectional view showing a guide rib of the capacitor induction motor of the present invention at PP ′ in FIG.

FIG. 4 is a sectional view showing a guide rib of another embodiment of the capacitor induction motor of the present invention.

FIG. 5 is a plan view of an example showing a winding state of a stator winding on a connection side according to a conventional capacitor induction motor.

[Explanation of symbols]

1 Stator core 2 Yoke 3 approximately I-shaped 4 U-shaped 5 Inverted U-shape 6a inner groove 6b outer groove 6c inner groove 6d outer groove 7 Pre-molded section 7a outer partition 7b Inner partition wall 7c Intermediate partition 7d support wall 7d1 central support pillar 7d2 Left support pillar 7d3 Right support pillar 7f guide rib 8 outer winding 8a Outer winding A 8b Outer winding B 8c Outer winding C 9 Inner winding 9d Inner winding D 9e Inner winding E 9f Inner winding F 10 Deceleration winding 10g Reduction winding G 10h Deceleration winding H 10i Reduction winding I L Guide rib height S Gap between the intermediate wall and the guide rib H clearance height AA 'Outer winding A lead wire BB 'Outer winding B lead wire CC 'Outer winding C lead wire DD 'Lead wire of inner winding D EE 'Lead wire of inner winding D FF 'Inside winding F lead wire GG 'deceleration winding X lead wire HH 'deceleration winding Y lead wire II 'deceleration winding Z lead wire

Claims (7)

(57) [Claims] 1. A substantially U-shaped tooth portion is provided at equal intervals from a yoke portion of a stator iron core, and the substantially I-shaped tooth portion is symmetrical in a U-shape on both sides from the base end of every other tooth portion. , The substantially U-shaped tooth portion is provided, and the inner groove and the outer groove are formed inside and outside the substantially U-shaped tooth portion and the substantially inverted U-shaped tooth portion, respectively, and at least opposite to the rotor. Except for the tip of the tooth,
Pre-mold with resin to cover the stator core,
An outer partition wall on the outer peripheral portion on the connection side, an intermediate wall between the outer groove and the inner groove, an inner partition wall on the inner peripheral portion, between the outer partition wall and the intermediate wall, the substantially inverted U-shape, A support wall having right, center, and left support columns is integrally formed along substantially U-shaped teeth, and an outer winding is wound between the outer groove and the next outer groove, and then, The inner winding is wound between the inner groove and the next inner groove, the end of the inner winding is arranged along the intermediate wall on the connection side, and the reduction winding is attached to the inner winding. In a capacitor induction motor that is wound in a stack, a guide rib is integrally provided with a pre-mold on the inner peripheral side of the center of the intermediate wall above the substantially I-shaped tooth portion, and the guide rib and the A capacitor induction motor, characterized in that a gap is formed between the intermediate walls to sandwich the end of the inner winding. 2. A substantially I-shaped tooth portion is provided at equal intervals from a yoke portion of a stator core, and the substantially I-shaped tooth portion is symmetrical with a substantially U-shaped portion on both sides from the base end of every other tooth portion. , The substantially inverted U-shaped teeth are provided, and the inner groove and the outer groove are formed inside and outside the substantially U-shaped and substantially inverted U-shaped teeth, respectively. An outer partition wall on an outer peripheral portion, an intermediate wall between the outer groove and the inner groove, an inner partition wall on an inner peripheral portion, and the substantially inverted U-shape and the substantially U-shape between the outer partition wall and the intermediate wall. An insulator, which forms a guide path for the winding by forming a support wall having right, center, and left support columns along the tooth portion of the mold, is mounted, and the outer winding is moved from the outer groove to the next outer groove. And then winding the inner winding between the inner groove and the next inner groove, and arranging the end of the inner winding along the intermediate wall on the connection side. , Wrap the deceleration winding on the inner winding In the capacitor induction motor configured as above, a guide rib is integrally projectingly provided on the inner peripheral side of the center of the intermediate wall of the insulator, above the substantially I-shaped tooth portion, and between the guide rib and the intermediate wall, A capacitor induction motor, characterized in that a gap sandwiching the end of the inner winding is formed. 3. The capacitor induction motor according to claim 1, wherein the corner portion of the gap is provided with R. 4. The capacitor induction motor according to claim 1, wherein the height of the guide rib is substantially equal to that of the intermediate wall. 5. The guide rib is formed so as to be continuous with the inner partition wall above the substantially I-shaped tooth portion and gradually lower in height toward the outer periphery. Or the capacitor induction motor according to claim 2. 6. The capacitor induction motor according to claim 1, wherein a gap between the intermediate wall and the guide rib is formed to be substantially the same as the outer diameter of the inner winding. 7. The height of the gap between the intermediate wall and the guide rib is formed so that the lead wire of the inner winding does not come into contact with the base end of the substantially I-shaped tooth portion. The capacitor induction motor according to claim 1 or 2, characterized in that.