JP2002315236A - Stator of internal rotating motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of a coil and efficiency of a motor when a direct winding coil is wound to a two-pole four-coil motor. SOLUTION: A stator iron core is split, before the coil is wound, into eight split iron core bodies in total including four split iron core bodies a2 and four split iron core bodies b matched in the longitudinal direction of a yoke 10 held by the split iron core bodies a2 and the steel plate rolling direction, and these are combined in the annular shape after the winding of the coil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for an adduction type electric motor in which a stator iron core is divided into a plurality of parts, windings are wound around the core, and the divided iron cores are integrated in a ring. About.

[0002]

2. Description of the Related Art In recent years, a stator in which a winding is applied to a plurality of divided iron core bodies and the divided iron core bodies are arranged in a ring shape, and a method of manufacturing the stator have been widely used.

Conventionally, as an example of the configuration of this type of stator, one described in Japanese Patent Application Laid-Open No. 9-46979 has been known. Hereinafter, the configuration will be described with reference to FIGS.

[0004] As shown in FIGS. 12 and 13, the divided tooth portion 201 is insulated with insulating materials 202 and 203, and provided with a relay pin 205 serving as a winding start portion and a winding end portion of the winding 204. After winding the wire 204, these were combined into a ring to form a stator.

As shown in FIGS. 14 to 16, similarly, a stator iron core having four slots 301 is provided at the intermediate portion of a yoke portion 303 connecting adjacent tooth portions 302 with each other. And the winding 305 is wound by the winding machine 307 via the insulating material 304. However, since the yoke portion 303 extends in the circumferential direction with respect to the tooth portion 302 and is long in an arc shape. In the winding work of the winding 305, it is necessary to take measures such as mounting a special winding guide.

[0006]

In such a conventional stator configuration, when the former configuration is applied to the latter as it is and the winding 305 is wound around the tooth portion 302 of the divided iron core body 306 that is divided. Since the yoke portion 303 is long in an arc shape, it is necessary to take measures such as mounting the winding guides a308 and b309, and the winding 305 is formed on the surfaces of the winding guides a308 and b309. It is difficult to secure the winding quality because it is wound around the tooth portion 302 while sliding, and since the tooth portion 302 and a part of the yoke portion 303 have an integral split structure, the There is a problem that it is difficult to improve the motor efficiency by limiting the rolling direction of the magnetic steel sheet.

The present invention solves the above-mentioned problems, and enables winding of a winding without attaching a special winding guide to a stator iron core. It is an object of the present invention to provide a stator of an adduction type electric motor capable of improving the motor efficiency by improving the shape and limiting the rolling direction of the magnetic steel sheet.

[0008]

SUMMARY OF THE INVENTION In the stator of the adduction motor according to the present invention, the teeth of the stator iron core having four slots and four teeth are wound in two poles by concentrated winding. In the stator in which the A-phase winding and the two-pole B-phase winding are alternately wound and arranged, the stator iron core has a tooth portion and a yoke portion integrated before winding. The four iron cores a and the four split iron cores b of the yoke portion sandwiched between the split iron cores a are divided into eight pieces, which are combined into a ring after the winding is completed. The structure of the stator to be integrated is such that the four divided iron cores b are punched and laminated so that the longitudinal direction is the rolling direction in the electromagnetic steel sheet manufacturing process.

According to the present invention, the stator of the adduction type electric motor can be wound without attaching a special winding guide or the like, and the winding quality can be secured, and the motor efficiency can be improved. Can be provided.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a two-pole A-phase with concentrated winding for each tooth of a stator iron core having four slots and four teeth. In a stator in which windings and two-pole B-phase windings are alternately wound and arranged in series, the stator iron core is a divided iron core body in which the teeth and the yoke are integrated before winding. a and four divided iron cores b of the yoke portion sandwiched between the divided iron cores a are divided into four, eight in total. The four iron cores b are punched and laminated so that the longitudinal direction is in the rolling direction in the manufacturing process of the magnetic steel sheet, and the winding is wound around the stator iron core. This has the effect that the winding quality can be ensured, such as the prevention of damage to the film or the prevention of disconnection, and the effect that the motor efficiency can be improved.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

(Embodiment 1) As shown in FIGS. 1 to 10, the stator iron core 1 is divided into eight divided iron cores a2 and four divided iron cores b3. The split iron core body a2 is disposed on the outer periphery of the rotor hole 4 such that the teeth 5 are linear or substantially radial, and the A-phase winding winding body 7 on which the A-phase winding 6 is wound is composed of two. And a B-phase winding wound body 9 in which the B-wrapped winding 8 is wound at a position separated by 90 degrees in electrical angle with respect to the B-phase winding wound body 9. Are arranged alternately in a ring shape to form the stator 11. The split iron core body b3 is punched and laminated so that the circumferential direction, that is, the longitudinal direction is the rolling direction in the electromagnetic steel sheet manufacturing process. Then, at the time of winding, the stator core 1 is divided into eight, the insulating material 12 is attached to the four divided iron cores a2, and then the A-phase winding 6 or the B-phase winding 8 is attached. Winding machine (not shown)
To form two A-phase windings 7 and two B-phase windings 9, respectively. After completing the winding, the insulating material 1
The two outer peripheral sides 12a are pressed and deformed in the inner diameter direction and are integrated along the inner peripheral side of the divided iron core body b3 to form four slots 13 and constitute an annular stator.

Further, only the arc-shaped portion on the outer diameter side of the four divided iron core members a2 is fitted and held in the inner diameter portion of the housing 14 and contributes to securing the roundness of the inner diameter of the stator. The outer diameter side of the split iron core body b3 has a configuration in which a gap 15 is formed in non-contact with the inner diameter portion of the housing.

As described above, according to the stator of the adduction motor according to the first embodiment of the present invention, the A-phase winding 6 or the B-phase winding is wound on the divided iron core a2 by a winding machine (not shown). When the winding 8 is wound in series, the divided iron core b3 is removed and the winding is wound around the single divided iron core a2, and a complicated winding guide and the like are mounted by a winding machine. The winding can be wound by a simple winding motion without winding, so that the winding can be wound without sliding on the surface of the winding guide, preventing the occurrence of defects such as damage to the winding film or disconnection. Line quality can be ensured. And, the longitudinal direction of the four divided iron core bodies b3 is
This is the same as the rolling direction in the manufacturing process of the electromagnetic steel sheet, which is the direction of easy magnetization, and the motor efficiency can be improved.

Further, since the outer diameter side of the four divided iron cores b3 is not in contact with the inner diameter of the housing 14, it is not necessary to manufacture the outer peripheral shape of the divided iron core b3 with high precision. In addition, a low-priced mold can be used, and cost can be rationalized.

(Embodiment 2) As shown in FIG.
The outer diameter side shape and the inner diameter side shape in the longitudinal direction of each of the divided iron core bodies b3 are configured to be linear or substantially linear.

Further, a configuration is used in which the four divided iron core members b3 are made of grain-oriented electrical steel sheets.

Further, the radial direction of the four divided iron cores a2 is made to coincide with the rolling direction of the magnetic steel sheet, and the divided iron cores a2 are also made of a directional magnetic steel sheet.

As described above, according to the stator of the adduction type electric motor according to the second embodiment of the present invention, the outer diameter side shape and the inner diameter side shape of the four divided iron core members b3 in the longitudinal direction are linear or substantially linear. It is formed in a straight line, so that the magnetic path length of the divided iron core body b3 can be reduced and good magnetic characteristics in the rolling direction can be effectively utilized.

Further, by using a grain-oriented electrical steel sheet having extremely good magnetic properties in the rolling direction as the four divided iron cores b3, the magnetic properties in the yoke portion are maintained very good, and the motor efficiency is greatly improved. It can be improved.

Further, the joining direction of the four divided iron cores a2 is made to coincide with the rolling direction of the magnetic steel sheet, and the divided iron cores a2 are also made of a directional magnetic steel sheet, so that the motor efficiency is improved. It is possible to further improve.

[0022]

As is clear from the above embodiment,
According to the present invention, for each tooth portion of the stator iron core having four slots and four tooth portions, two-phase A-phase winding and two-pole B-phase winding are alternately formed by concentrated winding. The stator iron core has four divided iron cores a with integral teeth and yoke before winding, and this divided iron core a The split iron core body b of the yoke portion to be held is divided into four pieces, that is, a total of eight pieces, and after the winding is completed, these are combined into a ring to form a stator structure. Since the body b is formed by punching and laminating so that the longitudinal direction is the rolling direction in the manufacturing process of the electromagnetic steel sheet, a complex winding guide is mounted when the A-phase winding or the B-phase winding is directly wound. It is possible to provide a stator of an adduction type electric motor which can be wound without any trouble, can prevent the damage of the winding film or the disconnection, and can improve the motor efficiency.

Further, only the arc-shaped portion on the outer diameter side of the four divided iron cores a is fitted and held in the inner diameter portion of the housing, thereby contributing to ensuring the roundness of the inner diameter of the stator, and Since the outer diameter side of the core b is not in contact with the inner diameter of the housing, there is no need to manufacture the outer peripheral shape of the divided iron core b3 with high precision, and a low-cost mold is used. And cost can be rationalized.

Further, since the four divided iron cores b are formed such that the outer diameter side shape and the inner diameter side shape in the longitudinal direction are linear or substantially linear, the magnetic path length can be reduced and the electromagnetic steel sheet can be reduced. The good magnetic properties in the rolling direction can be effectively used, and the motor efficiency can be improved.

In addition, since the four divided iron cores b are made of a grain-oriented magnetic steel sheet, the motor efficiency can be greatly improved.

The radial direction of the four divided iron cores a is made to coincide with the rolling direction of the electromagnetic steel sheet, and the divided iron cores a
In addition, since the structure using the grain-oriented magnetic steel sheet is used, the motor efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a stator core of an adduction motor according to Embodiment 1 of the present invention;

FIG. 2 is a perspective view showing a divided iron core a of a stator of the adduction motor.

FIG. 3 is a perspective view showing a split iron core plate b of a stator of the adduction motor.

FIG. 4 is a front view showing a stator of the adduction motor.

FIG. 5 is a front view showing a state in which an insulating material is mounted on the divided iron core body a of the stator of the adduction motor.

FIG. 6 is a partially cutaway front view showing a state in which a winding is wound around a divided iron core body a of the adduction motor.

FIG. 7 is a front view showing a state in which the outer peripheral portion of the insulating material of the divided iron core body a of the adduction motor is deformed into an arc shape;

FIG. 8 is a front view showing a state in which four divided iron cores a of the adduction type electric motor are arranged in a ring shape;

FIG. 9 shows a split iron core body a and a split iron core body b of the adduction motor.
Partially broken front view showing the assembled state

FIG. 10 is a partially broken front view showing a state in which a stator core of the adduction type electric motor is press-fitted into a housing.

FIG. 11 is a front view showing a stator iron core of the adduction motor according to the second embodiment of the present invention.

FIG. 12 is a perspective view showing a state in which a tooth of a stator of a conventional adduction type electric motor is wound with a winding.

FIG. 13 is a plan view showing a portion of the stator.

FIG. 14 is a plan view of a stator of another conventional adduction motor.

FIG. 15 is a plan view showing a divided portion of the stator.

FIG. 16 is a plan view showing a state where a winding is wound around a divided portion of the stator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core 2 Split iron core body a 3 Split iron core body b 4 Rotor hole 5 Teeth 6 A phase winding 7 A phase winding winding 8 B phase winding 9 B phase winding winding DESCRIPTION OF SYMBOLS 10 Yoke part 11 Stator 12 Insulating material 12a Outer peripheral side of insulating material 13 Slot 14 Housing 15 Clearance

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H002 AA07 AB01 AB05 AC08 AE07 AE08 5H604 AA08 BB01 BB07 BB10 BB14 CC01 CC05 CC16 5H615 AA01 BB01 BB04 BB07 BB14 BB16 PP01 PP06 PP07 PP12 QQ02 QQ19 SS05 SS11

Claims (5)

[Claims] 1. A two-phase A-phase winding with concentrated winding and two poles for each tooth of a stator core having four slots and four teeth.
In a stator in which pole B-phase windings are alternately wound and arranged alternately, the stator iron core has four divided iron cores a with integral teeth and yoke before winding winding. And the divided iron core b of the yoke portion sandwiched between the divided iron cores a is divided into four, a total of eight,
After the winding is completed, the stators are combined to form an annularly integrated stator, and the four divided iron cores b are punched and laminated so that the longitudinal direction is the rolling direction in the electromagnetic steel sheet manufacturing process. Stator of adduction motor. 2. Only four arc-shaped portions on the outer diameter side of the four divided iron cores a are fitted and held in the inner diameter portion of the housing to contribute to securing the roundness of the inner diameter of the stator. 2. The stator for an internal rotation motor according to claim 1, wherein an outer diameter side of the core body b is not in contact with an inner diameter portion of the housing. 3. The fixing of the adduction type electric motor according to claim 1, wherein the four divided iron cores b have a configuration in which the outer diameter side shape and the inner diameter side shape in the longitudinal direction are formed linearly or substantially linearly. Child. 4. The stator for an adduction motor according to claim 1, wherein a grain-oriented electrical steel sheet is used for the four divided iron cores b. 5. The adduction according to claim 1, wherein the radial direction of the four divided iron cores a is made coincident with the rolling direction of the magnetic steel sheet, and the directional magnetic steel sheet is also used as the divided iron core body a. Type motor stator.