WO2013157100A1

WO2013157100A1 - Stator, motor, blower, and stator manufacturing method

Info

Publication number: WO2013157100A1
Application number: PCT/JP2012/060499
Authority: WO
Inventors: 正樹亀山; 晋也大石; 出口　学; 敏彦水谷; 隆之鬼橋; 克紀福與; 鈴木　高志
Original assignee: 三菱電機株式会社
Priority date: 2012-04-18
Filing date: 2012-04-18
Publication date: 2013-10-24
Also published as: JPWO2013157100A1; CN104126267A; JP5944984B2; HK1199328A1

Abstract

This stator is provided with an annular yoke comprising a plurality of recesses disposed at equal intervals in the inner periphery, and with teeth which, in a state before being fitted and fixed in the recesses, are concentratedly wound in series with winding wire of the same phase for each AC phase group, and which, after winding, are fitted and fixed in the recesses alternately such that different phase groups are adjacent to one another. Further, this method is for manufacturing a stator which comprises winding wire wound around the stator core formed having an annular yoke comprising a plurality of recesses disposed at equal intervals in the inner periphery, and teeth fitted and fixed in the recesses, wherein said method involves: a step in which, in a state before the teeth are fitted and fixed in the recesses, teeth of each AC phase group are concentratedly wound with winding wire of the same phase in series; and a step in which, after the winding, the teeth are fitted and fixed in the recesses alternately such that different phase groups are adjacent to one another.

Description

Stator, motor, blower, and stator manufacturing method

The present invention relates to a stator, a motor, a blower, and a stator manufacturing method.

Conventionally, after laminating iron plates that are divided in the circumferential direction for each pole tooth unit and provided with uneven fitting portions on the divided surfaces, the inner and outer diameters are laser-welded to form laminated core pieces, and the laminated core pieces A stator of a rotating electrical machine comprising a winding portion orthogonal to a pole tooth portion of a piece, wherein a predetermined number of the laminated core pieces are connected in an annular shape, and an outer peripheral portion of a connecting surface is fixed by laser welding in a lamination direction. It is disclosed (for example, see Patent Document 1).

In addition, an iron core obtained by dividing and laminating a pole tooth portion having a joint and pole teeth for each pole tooth unit, a winding portion applied to the pole teeth of this laminated core, and a predetermined number of laminated cores are combined in a cylindrical shape. A stator of a rotating electrical machine is disclosed that includes an annular structure that covers an outer peripheral portion of a cylindrical body and presses the laminated iron core in an inner diameter direction (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 07-007875 Japanese Patent Laid-Open No. 06-105487

However, according to the conventional technique described in Patent Document 1, a predetermined number of laminated core pieces are bonded in an annular shape, and the outer peripheral portion of the bonding surface is fixed by laser welding in the stacking direction. Therefore, if the rigidity and roundness of the stator is low and the roundness is low, there is a problem that the electromagnetic excitation force increases due to an increase in spatial harmonics, and the vibration and noise of the motor increase.

Further, according to the conventional technique described in Patent Document 2, there is a problem that an annular structure that presses the laminated iron core in the inner diameter direction is required to increase the rigidity and the roundness.

The present invention has been made in view of the above, and an object of the present invention is to obtain a stator having high rigidity and roundness without requiring an annular structure or the like while being capable of winding a winding with high density. And

In order to solve the above-described problems and achieve the object, the present invention provides an annular yoke in which a plurality of recesses are provided at equal intervals on an inner peripheral portion, and a state before being fitted and fixed to the recesses. The same phase winding is concentrated and wound in series for each AC phase group, and the teeth are alternately fitted and fixed in the recess so that different phase groups are adjacent to each other after the winding. And

The stator according to the present invention can be wound with high density and has the effect of high rigidity and roundness without external fitting of an annular structure or the like.

FIG. 1 is a front view showing a stator core according to a first embodiment of a stator according to the present invention. FIG. 2 is a front view of the stator core according to the first embodiment in an exploded state. FIG. 3 is a front view showing a state where winding is performed on the same phase teeth of the stator core of the first embodiment. FIG. 4 is a front view showing the stator core coupled insulator according to the first embodiment. FIG. 5 is a front view showing a state in which teeth after winding of the stator core of the first embodiment are arranged in an annular shape. FIG. 6 is a front view showing the stator of the first embodiment. FIG. 7 is a front view showing a stator core according to the second embodiment of the stator of the present invention. FIG. 8 is a front view of a state in which the stator core of the second embodiment is disassembled. FIG. 9 is a front view showing a state where winding is performed on the same phase teeth of the stator core of the second embodiment. FIG. 10 is a partial sectional view of a motor incorporating the stator of the first embodiment. FIG. 11A is a front view of a ventilation fan incorporating the motor according to the third embodiment. FIG. 11-2 is a side view of the ventilation fan incorporating the motor according to the third embodiment.

Hereinafter, embodiments of a stator, a motor, a blower, and a stator manufacturing method according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a front view showing a stator core according to a first embodiment of the stator according to the present invention, FIG. 2 is a front view of the stator core according to the first embodiment in an exploded state, and FIG. FIG. 4 is a front view showing a state in which winding is performed on teeth of the same phase of one stator core, FIG. 4 is a front view showing a connected type insulator of the stator core of Embodiment 1, and FIG. FIG. 6 is a front view showing a state in which teeth after winding of the stator core of Embodiment 1 are arranged in an annular shape, and FIG. 6 is a front view showing the stator of Embodiment 1;

As shown in FIGS. 1 and 2, the stator core 10 according to the first embodiment includes an annular yoke 11 and base end portions 12 a in recesses 11 a provided at eight positions on the inner peripheral portion of the yoke 11 at equal intervals. And a tooth 12 to be fitted and fixed. The stator core 10 according to the first embodiment is a stator core of a single-phase 8-slot 4-pole concentrated winding motor.

Before winding the stator core 10, as shown in FIG. 2, the stator core 10 is disassembled into a yoke 11 and a tooth 12, and a U-phase winding in which a single-phase AC U-phase winding is concentrated is wound. It is divided into a phase group 12U and a V-phase group 12V in which V-phase windings are concentrated.

The U-phase group 12U is a group of three teeth 12 at different angles by 90 ° from one tooth 12 and one tooth 12, and the V-phase group 12V is a tooth 12 adjacent to one tooth 12 and This is a group of three teeth 12 at a location where the angle differs by 90 ° from the adjacent teeth 12.

3, U-phase windings 60 are concentratedly wound in series on the U-phase group 12U of the teeth 12. A V-phase winding 60 is concentratedly wound in series in the V-phase group 12V. An insulator 51 is attached to the teeth 12 so as to be sandwiched from above and below, and windings 60 are concentrated in series on four teeth 12 of the same phase arranged in a circle by a winding machine (not shown) provided with a nozzle 70. Roll it up. The four teeth 12 are arranged with the yoke 11 removed, and are spaced apart from each other by 90 °, so that the nozzle 70 does not interfere with the winding 60 of the adjacent tooth 12, and the winding 60 is easy to wind. The winding 60 can be wound with high density.

Further, as shown in FIG. 4, four teeth 12 of the same phase are sandwiched and fixed from above and below by a connecting type insulator 52 in which teeth covering portions 52 a separated from each other by 90 ° are connected by a connecting portion 52 b, and are circularly shaped. Winding may be performed on the four teeth 12 arranged side by side. Since the connection type insulator 52 has high rigidity, the four teeth 12 can be firmly fixed, and the winding 60 can be easily wound.

After winding of the U-phase group 12U and the V-phase group 12V, as shown in FIG. 5, the teeth 12 of the U-phase group 12U and the teeth 12 of the V-phase group 12V are alternately arranged in an annular shape. To place. At this time, when the connection parts 52b of the connection type insulator 52 interfere with each other, the connection part 52b is cut off.

As shown in FIG. 6, when the base end portions 12a of the eight teeth 12 arranged in an annular shape are fitted and fixed to the concave portions 11a of the yoke 11, the stator 81 of the first embodiment is completed. The stator 81 has a high roundness and rigidity because the yoke 11 has an annular shape and is not divided.

Further, since the teeth 12 are divided into a U-phase group 12U and a V-phase group 12V and are separated from each other at an interval of 90 °, the winding 60 is wound, so that the winding 60 can be wound with high density.

Embodiment 2. FIG.
7 is a front view showing a stator core according to a second embodiment of the stator according to the present invention, FIG. 8 is a front view of the stator core according to the second embodiment in an exploded state, and FIG. It is a front view which shows the state which is winding to the teeth of the same phase of 2 stator cores.

As shown in FIGS. 7 and 8, the stator core 20 according to the second embodiment includes an annular yoke 21 and a base end portion 22 a in recesses 21 a provided at equal intervals at 18 locations on the inner peripheral portion of the yoke 21. The teeth 22 are fitted and fixed. The stator core 20 according to the second embodiment is a stator core of a three-phase 18 slot 6 pole concentrated winding motor.

Before winding the stator core 20, as shown in FIG. 8, the stator core 20 is disassembled into a yoke 21 and a tooth 22, and a U-phase winding in which U-phase windings of a three-phase alternating current are concentratedly wound. The phase group 22U is divided into a V-phase group 22V in which a V-phase winding is concentrated and a W-phase group 22W in which a W-phase winding is concentrated.

The U-phase group 22U is a group of six teeth 22 that are different in phase by 60 ° from one tooth 22 and one tooth 22, and the V-phase group 22V is a tooth 22 adjacent to one tooth 12 and A group of six teeth 22 having a phase difference of 60 ° from the adjacent teeth 22, and the W-phase group 22 </ b> W includes two teeth 22 adjacent to one

tooth

12 and 60 ° from two adjacent teeth 22. This is a group of six teeth 22 at different phases.

As shown in FIG. 9, U-phase windings 60 are concentratedly wound in series on the six teeth 22 of the U-phase group 22U (only three are shown in FIG. 9). An insulator 54 is attached to the teeth 22 so as to be sandwiched from the front and rear, and winding is performed on the six U-phase teeth 22 arranged in a straight line by a winding machine (not shown).

The six teeth 22 are linearly spaced apart from each other with the yoke 21 removed, so that the nozzle of the winding machine (not shown) does not interfere with the winding 60 of the adjacent tooth 22 and is wound. The wire 60 can be easily wound, and the winding 60 can be wound with high density. The V-phase and W-phase windings are performed on the six teeth 22 of the V-phase group 22V and the W-phase group 22W in the same manner as described above. In the second embodiment, the six teeth 22 of each phase are arranged in a straight line and the winding is performed. However, the arrangement is arbitrary, and may be arranged in a circle, for example.

After the winding of the U-phase group 22U, the V-phase group 22V, and the W-phase group 22W, the teeth 22 of the U-phase group 22U, the teeth 22 of the V-phase group 22V, and the teeth 22 of the W-phase group 22W are not shown. Are arranged in an annular shape alternately so that the teeth 22 of different phase groups are adjacent to each other.

Although not shown, if the base end portions 22a of the 18 teeth 22 arranged in an annular shape are fitted and fixed to the concave portions 21a of the yoke 21, the three-phase 18 slot 6 pole concentrated winding stator of the second embodiment (see FIG. (Not shown) is completed. In the stator according to the second embodiment, since the yoke 21 is annular and is not divided, the roundness and the rigidity are high.

As described above, in the embodiment, the stator 81 of the single-phase 8-slot 4-pole concentrated winding motor and the stator of the 3-phase 18-slot 6-pole concentrated winding motor have been described. Regardless of the number, a stator with high roundness, rigidity and winding density can be obtained.

Embodiment 3 FIG.
FIG. 10 is a partial cross-sectional view of a motor incorporating the stator of the first embodiment, FIG. 11-1 is a front view of a ventilation fan incorporating the motor of the third embodiment, and FIG. FIG. 5 is a side view of a ventilation fan incorporating the motor according to the third embodiment.

As shown in FIG. 10, the motor 90 according to the third embodiment includes a frame 91 in which a front bearing holding portion 91 a is formed at the center of the front end plate, and a winding 60 wound around the insulator 51 to form a cylindrical shape of the frame 91. The stator 81 according to the first embodiment (which may be the stator according to the second embodiment) fitted in the body portion, the outer peripheral portion of the front end is fitted to the stator 81 and connected to the frame 91, and the center of the rear end plate The rear bearing 93b is formed on the cover 92 and the front bearing 93a fitted to the rotary shaft 93c is held on the front bearing holding portion 91a of the frame 91 and the rear bearing 93b fitted on the rotary shaft 93c is rear. And a rotor 93 that is held in the bearing holding portion 92a and disposed in the stator 81.

If the stator is not rigid like the stator of a conventional rotating electric machine, when the roundness of the frame and the cover is low, the roundness of the stator is low, and a high-precision motor cannot be obtained. In the motor 90 of the third embodiment, even if the roundness of the frame and the cover is low, the stator 81 is not deformed, is highly accurate, has windings wound at high density, and has low vibration. Low noise, low power consumption and long life.

As shown in FIGS. 11A and 11B, the ventilation fan 100 according to the third embodiment as a blower has the frame 101 mounted with the motor 90 according to the third embodiment that drives the fan 102. The ventilation fan 100 as a blower is equipped with the motor 90 of the third embodiment, and thus has low vibration, low noise, low power consumption, and long life. Although not shown, the motor 90 of the third embodiment can be mounted on a fan as a blower.

10, 20

Stator core

11, 21

Yoke

11a,

21a Recess

12, 22

Teeth

12a,

22a Base end

12U,

22U U-phase group

12V, 22V V-phase group 22W W-

phase group

51, 54 Insulator 52 Linked insulator 52a Teeth cover 52b Connecting portion 60 Winding 70 Nozzle 81 Stator 90 Motor 91 Frame 91a Front bearing holding portion 92 Cover 92a Rear bearing holding portion 93 Rotor 93a Front bearing
93b Rear bearing 93c Rotating shaft 100 Ventilation fan (blower)
101 frames 102 fans

Claims

An annular yoke provided with a plurality of recesses at equal intervals on the inner periphery,
In the state before being fitted and fixed in the recess, windings of the same phase are concentrated in series for each AC phase group, and after winding, they are alternately fitted in the recess so that different phase groups are adjacent to each other. With fixed teeth,
A stator comprising:
A motor comprising the stator according to claim 1.
A blower comprising the motor according to claim 2.
In a stator manufacturing method in which a winding is wound around a stator core including an annular yoke having a plurality of recesses provided at equal intervals on an inner peripheral portion, and teeth fitted and fixed to the recesses,
In a state before being fitted and fixed to the recess, a step of concentrating windings of the same phase in series on the teeth for each AC phase group;
After winding, fitting and fixing teeth alternately so that different phase groups are adjacent to the recess;
A method of manufacturing a stator, comprising:
5. The method according to claim 4, further comprising the step of fixing the teeth for each of the alternating current phase groups and concentrating windings of the same phase in series by a connection type insulator in which the teeth covering portions are connected by a connection portion. Method for manufacturing a stator.
6. The method of manufacturing a stator according to claim 5, further comprising a step of cutting the connecting portion after the step of concentrating the windings of the same phase in series.