CN110832742B - Stator and method for manufacturing stator - Google Patents
Stator and method for manufacturing stator Download PDFInfo
- Publication number
- CN110832742B CN110832742B CN201780092881.6A CN201780092881A CN110832742B CN 110832742 B CN110832742 B CN 110832742B CN 201780092881 A CN201780092881 A CN 201780092881A CN 110832742 B CN110832742 B CN 110832742B
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- hole
- stator
- core
- stator yoke
- clamper
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/08—Salient poles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The stator of the present invention is a stator of an outer rotor type motor in which a stator yoke and a tooth portion on which a winding is applied are separated. In the stator of the present invention, the 1 st hole for fixing the tooth portion to the stator yoke portion is provided in the stator yoke portion, and the 2 nd hole is provided in the tooth portion at the center portion of the tooth portion. The center of the 2 nd hole is located radially outward of the center of the 1 st hole in the stator yoke, and fitting pins are disposed in the 1 st hole and the 2 nd hole.
Description
Technical Field
The present invention relates to a stator of an outer rotor type motor having a tooth portion and a stator yoke portion separated from each other, and a method of manufacturing the same.
Background
The outer rotor type motor is required to be small, high in output and high in efficiency. In order to satisfy these requirements, the motor stator must have a large area occupied by the coil. In a conventional stator, a stator yoke portion on the center side of a coupling magnetic flux is integrated with a tooth portion on the radially outer side of a wound coil (for example, patent document 1). Therefore, when winding the teeth, a nozzle for feeding the winding wire must be inserted between the teeth. Since no winding is performed at the portion where the nozzle is inserted, the occupied area of the coil is reduced by the amount of the nozzle.
In contrast, patent document 2 describes a stator in which the stator yoke and the tooth are separate bodies. The stator is constituted to include: a stator yoke; a coil piece on which a winding is performed; a tooth portion of the iron core which becomes the coil piece; and a fitting pin. The tooth portions are fixed to the stator yoke portion together with the coil pieces by two fitting pins. In this stator, the coil pieces can be wound until the adjacent coil pieces come into contact with each other, and therefore the area occupied by the coil can be increased.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2006-238580
Patent document 2: japanese patent laid-open publication No. 2011-130602
Disclosure of Invention
Problems to be solved by the invention
However, in the stator, when a hole for inserting the fitting pin is opened in the electromagnetic steel plate, iron loss occurs in the motor. In the stator described in patent document 2, two holes for inserting the fitting pins are provided in the teeth. Therefore, the iron loss of the motor increases as compared with the case where no hole is provided or one hole is provided. Further, a hole for inserting the fitting pin is provided at an end of the tooth portion. The end portions of the teeth have a high magnetic flux density. Therefore, when the hole is provided at the end of the tooth, the amount of magnetic flux loss is large. This reduces the efficiency of the motor.
The present invention has been made to solve the above-described problems, and an object thereof is to provide a high-efficiency motor.
Means for solving the problems
The stator of the present invention is a stator of an outer rotor type motor in which a stator yoke and a tooth portion on which a winding is applied are separated. In the stator of the present invention, the 1 st hole for fixing the tooth portion to the stator yoke portion is provided in the stator yoke portion, and the 2 nd hole is provided in the tooth portion at the center portion of the tooth portion. In the stator of the present invention, the center of the 2 nd hole is located radially outward of the stator yoke portion with respect to the center of the 1 st hole, and the fitting pin is disposed in the 1 st hole and the 2 nd hole.
The method for manufacturing a stator according to the present invention includes the steps of: preparing a stator yoke part, wherein the stator yoke part is provided with a 1 st hole for fixing a tooth part; preparing a tooth portion having a 2 nd hole provided at a position shifted from the 1 st hole and wound; the fitting pin is inserted into the 1 st hole. The method for manufacturing a stator according to the present invention includes the steps of: the fitting pin is inserted into the 2 nd hole, and the tooth portion is pressed against the stator yoke portion, thereby fixing the tooth portion to the stator yoke portion.
In this way, the teeth previously wound are fixed to the stator yoke by the fitting pins. When the teeth are fixed to the stator yoke, the gap between adjacent teeth can be made very small. Therefore, the occupied area of the coil can be increased. Further, in the tooth portion, a hole for fixing to the stator yoke portion is provided only at one position in the central portion. The density of magnetic lines of force is low in the center of the tooth. Therefore, the iron loss of the motor does not increase.
Effects of the invention
This can provide a high-efficiency motor.
Drawings
Fig. 1 is a schematic view of an outer rotor type motor including a stator according to embodiment 1 of the present invention.
Fig. 2 is a view of the stator mounted to the housing.
Fig. 3 is a diagram showing the core and the clamper.
Fig. 4 is a plan view of a core plate constituting the core.
Fig. 5 is a side view of a core body in which core plates are laminated.
Fig. 6 is a plan view of the slot unit and the insulator mounted on the core.
Fig. 7 is a side view of fig. 6 as viewed from arrow VII.
Fig. 8 is a schematic plan view of a wound core.
Fig. 9 is a view of the iron core being mounted to the clamper.
Detailed Description
Hereinafter, embodiments of the stator according to the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and redundant description is omitted.
Fig. 1 is a schematic cross-sectional view of an outer rotor type motor including a stator according to embodiment 1 of the present invention.
In the outer rotor type motor 100, a stator 10 is attached to a ring-shaped housing 1. The stator 10 includes a holder 11 having an annular shape and an L-shaped cross section. A plurality of cores 12 are attached to the clamper 11. Arrow a indicates the radially outer side of the holder 11. In the core 12, a winding 13 is formed in the winding portion 12c with the direction of arrow a of the core 12 as an axis.
In the core 12, a 2 nd hole 12h is provided on the radial center side of the clamper 11. Further, the holder 11 is provided with a 1 st hole 11 h. The center 12p of the 2 nd hole 12h of the core 12 is offset outward in the radial direction of the clamper 11 indicated by the arrow a with respect to the center 11p of the 1 st hole 11h of the clamper 11. The core 12 is fixed to the clamper 11 by fitting pins 14 disposed in the 2 nd hole 12h and the 1 st hole 11 h. The holder 11 constitutes a stator yoke and the core 12 constitutes a tooth.
A rotor 20 is mounted on the housing 1. The rotor 20 has a rotation shaft 21 at the center. The rotary shaft 21 is rotatably supported by the housing 1. Further, the rotor 20 has a cylindrical rotor main body 22. A magnet 23 is provided inside the cylindrical portion of the rotor body 22. Magnet 23 faces iron core 12.
Fig. 2 is a view of the stator 10 mounted to the housing 1. The iron core 12 is mounted along the outer periphery of the clamper 11 over the entire circumference. In fig. 2, only a part of the core 12 is shown in order to make the structure easily visible.
The clamper 11 is attached to the housing 1 by a positioning pin 33 and a fixing bolt 34. The inner peripheral portion of the holder 11 is arranged radially outward of the holder 11 compared to the inner periphery of the housing 1.
Fig. 3 is a diagram showing the core and the clamper. The clamper 11 has a step, and the iron core 12 is disposed on a lower step surface 11d in the step. The iron core 12 with the winding portion 12c having the winding 13 formed therein has a nearly rectangular parallelepiped shape.
The iron core 12 has a root side surface 12s on the side contacting the clamper 11. The root side surface 12s has a circular arc shape when viewed from above. That is, the root side surface 12s is a curved surface. Further, the holder 11 has an outer peripheral surface 11a as a cylindrical surface on the radially outer side. The iron core 12 is in contact with the outer peripheral surface 11a of the clamper 11 on the base side surface 12s by two straight lines 12 e.
Hereinafter, the stator in embodiment 1 will be further described with reference to fig. 4 to 9 and 2.
Fig. 4 is a plan view of the core plate 12z constituting the core body. The core 12z is made of an electromagnetic steel plate. The core plate 12z has a base portion 12b, a winding portion 12c, and an outer peripheral portion 12 d. A 2 nd hole 12h as a through hole is provided in the center of the root 12 b. The winding portion 12c is rectangular. The winding portion 12c is formed to have a width smaller than the base portion 12b and the outer peripheral portion 12 d.
Fig. 5 is a side view of the core main body. The core body 12y is formed by stacking electromagnetic steel plates, punching the core plate 12z described in fig. 4, and caulking the punched core plate. That is, the core body 12y is formed by laminating core plates 12z described with reference to fig. 4.
Fig. 6 is a plan view of the iron core with the insulating member mounted thereon. Fig. 7 is a view of fig. 6 as viewed from arrow VII.
An insulator 32 as an insulator having flanges perpendicular to both ends is attached to one surface of the core body 12 y. The insulator 32 is similarly attached to a surface of the insulator 32 facing the surface on which the insulator 32 is attached. The insulator 32 has 4 corners 32c on the periphery.
A slot unit 31, which is a sheet-like insulator, is attached to the side surface of the core body 12y to which the insulator 32 is not attached. The groove unit 31 is bent corresponding to the corner 32c of the insulator 32. The folded groove unit 31 is provided with a folded portion 31 a.
The folded portion 31a is further folded as shown by a broken line as will be described later.
Fig. 8 is a schematic plan view of a wound core. As shown in fig. 8, a winding wire 13 is wound on a winding portion 12c of a core body 12 y. The winding wire 13 uses a heat-resistant enameled wire. The winding wire 13 is wound around the slot unit 31 and the insulator 32. By this, the winding wire 13 ensures insulation from the core main body 12 y. The folded portion 31a of the slot unit 31 is folded to cover the winding wire 13 from the outside. Thereby, insulation with the winding 13 of the adjacent iron core 12 is ensured.
Fig. 9 is a view of mounting the core 12 to the clamper 11. As shown in fig. 9, iron core 12 with winding 13 is attached to holder 11.
First, the iron core 12 is disposed on the outer periphery of the clamper 11. In this case, since the holder 11 is provided with a step, the iron core 12 is disposed on the lower step surface 11d of the holder 11.
In the clamper 11, the 1 st hole 11h is provided in advance in the lower step surface 11d of the clamper 11 corresponding to the number of the cores 12. In this case, the center 11p of the 1 st hole 11h is arranged radially inward of the clamper 11 than the center 12p of the 2 nd hole 12 h.
Next, the fitting pin 14 is inserted into the 1 st hole 11h of the clamper 11.
Next, the fitting pin 14 is inserted into the 2 nd hole 12h of the core 12. In this case, the center 12p of the 2 nd hole 12h is located radially outward of the holder 11 than the center 11p of the 1 st hole 11h, and therefore the iron core 12 is press-fitted into the holder 11 while being pressed.
Next, the step of attaching the core 12 to the clamper 11 by the fitting pin 14 is performed over the entire circumference of the clamper 11.
Next, the upper portions of the adjacent cores 12 are welded. Thereby, the welded portion 41 is formed. The iron core 12 receives a reaction force from the outer rotor magnet 23 in the circumferential direction B. The core 12 receiving the reaction force can release the load generated by the reaction force to the adjacent core 12 via the welded portion 41.
Next, welding is performed between the core 12 and the clamper 11 over the entire circumference. Thereby, the welded portion 42 is formed. The engagement pin 14 is prevented from coming off by this welding. Further, the iron core 12 is more firmly fixed with respect to the clamper 11.
In addition, in the case where the core 12 is sufficiently fixed to the clamper 11 only by the fitting pin 14, the above two types of welding may be omitted.
Thereafter, the holder 11 to which the iron core 12 is fixed to the housing 1 by the positioning pin 33 and the fixing bolt 34 (see fig. 2).
The iron core 12 is wound with a wire 13 in advance. Therefore, when the cores 12 are fixed to the clamper 11, the gap between the adjacent cores 12 can be made very small. Therefore, the occupied area of the coil can be increased. Further, one 2 nd hole 12h for fixing to the clamper 11 is provided in the core 12 at the center portion. The iron loss of the motor does not increase because the density of the magnetic lines of force is low in the central portion of the iron core 12. This can improve the efficiency of the motor.
The center 12p of the hole 12h of the core 12 is offset radially outward of the clamper 11 with respect to the center 11p of the 1 st hole 11h of the clamper 11. Therefore, when fixed to the clamper 11, the iron core 12 is pressed against the clamper 11. The curvature radius R2 of the base side surface 12s of the core 12 is smaller than the radius R1 of the outer peripheral surface 11a of the clamper 11. Therefore, the root side surface 12s of the core 12 contacts the outer peripheral surface 11a of the clamper 11 with two straight lines 12 e. Thus, the iron core 12 contacts the clamper 11 in two straight lines 12e, whereby the rotation of the iron core 12 around the fitting pin 14 is suppressed.
The radius of curvature R2 of the root side 12s of the core 12 is smaller than the radius R1 of the clamper 11. Further, the iron core 12 is pressed against the clamper 11. In this way, since the core 12 follows the curved surface of the clamper 11, the surface on the outer circumferential side of the core 12 can be ensured with roundness.
As described above, in the stator 10 of the outer rotor type motor 100 according to embodiment 1, the clamper 11 is provided with the 1 st hole 11h for fixing the core 12 having the winding 13 to the clamper 11, and the core 12 is provided with the 2 nd hole 12h at the center portion of the core 12. The center 12p of the 2 nd hole 12h is located radially outward of the holder 11 with respect to the center 11p of the 1 st hole 11h, and the fitting pin 14 is disposed in the 1 st hole 11h and the 2 nd hole 12 h.
Thus, the iron core 12 on which the winding 13 is previously formed is fixed to the clamper 11 by the fitting pin 14. In the case where the cores 12 are fixed to the clamper 11, the gap between the adjacent cores 12 can be made very small. Therefore, the occupied area of the coil can be increased. Further, one 2 nd hole 12h for fixing to the clamper 11 is provided in the core 12 at the center portion. The iron loss of the motor does not increase because the density of the magnetic lines of force is low in the central portion of the iron core 12.
This can provide a high-efficiency motor.
In the radial direction of the clamper 11, the base side surface 12s of the core 12 is in contact with the outer peripheral surface 11a of the clamper 11, the base side surface 12s is a curved surface, the outer peripheral surface 11a is a cylindrical surface, and the curvature radius R2 of the base side surface 12s is smaller than the radius R1 of the outer peripheral surface 11 a. This suppresses the rotation of the core 12 around the fitting pin 14. Further, since the core 12 follows the curved surface of the clamper 11, the surface of the outer circumferential side of the core 12 can be ensured with roundness.
In addition, the method for manufacturing the stator of the outer rotor type motor according to embodiment 1 includes the steps of: preparing a holder 11, the holder 11 being provided with a 1 st hole 11h for fixing an iron core 12; an iron core 12 is prepared, and the iron core 12 has a 2 nd hole 12h provided at a position shifted from the 1 st hole 11h and is wound with a wire 13. The method for manufacturing a stator according to embodiment 1 includes the steps of: inserting the fitting pin 14 into the 1 st hole 11 h; the fitting pin 14 is inserted into the 2 nd hole 12h, and the iron core 12 is pressed against the holder 11, thereby fixing the iron core 12 to the holder 11.
Thus, the iron core 12 is fixed while being pressed against the clamper 11. This suppresses the rotation of the core 12 around the fitting pin 14. Further, one 2 nd hole 12h for fixing to the clamper 11 is provided in the core 12 at the central portion where the density of magnetic lines of force is low. Thus, the iron loss of the motor is not increased.
Description of the reference symbols
10: a stator; 11: a gripper (stator yoke); 11 a: an outer peripheral surface; 11 h: 1, hole; 11 p: center of the 1 st well; 12: iron cores (teeth); 12 h: a 2 nd well; 12 p: center of the 2 nd well; 12 s: the root side; 13: winding; 14: a fitting pin; 100: an outer rotor type motor; r1: the radius of the outer peripheral surface of the holder; r2: radius of curvature of the root side of the core.
Claims (3)
1. A stator of an outer rotor type motor having a stator yoke and a wound tooth portion as separate bodies,
a 1 st hole for fixing the tooth portion to the stator yoke is provided at the stator yoke,
a 2 nd hole is provided in a central portion of the tooth portion,
a center of the 2 nd hole is located radially outward of the stator yoke portion than a center of the 1 st hole,
fitting pins are disposed in the 1 st hole and the 2 nd hole.
2. The stator according to claim 1,
a root side surface of the tooth portion is in contact with an outer circumferential surface of the stator yoke portion in a radial direction of the stator yoke portion,
the side surface of the root is a curved surface,
the outer peripheral surface is a cylindrical surface,
the root side surface has a radius of curvature smaller than the radius of the outer peripheral surface.
3. A method for manufacturing a stator, comprising:
preparing a stator yoke provided with a 1 st hole fixing a tooth portion;
preparing the tooth portion having a 2 nd hole provided at a position shifted from the 1 st hole and wound;
inserting a fitting pin into the 1 st hole; and
inserting the fitting pin into the 2 nd hole and pressing the tooth portion against the stator yoke portion, thereby fixing the tooth portion to the stator yoke portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/025184 WO2019012592A1 (en) | 2017-07-10 | 2017-07-10 | Stator and stator manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110832742A CN110832742A (en) | 2020-02-21 |
| CN110832742B true CN110832742B (en) | 2021-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780092881.6A Active CN110832742B (en) | 2017-07-10 | 2017-07-10 | Stator and method for manufacturing stator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6712095B2 (en) |
| CN (1) | CN110832742B (en) |
| WO (1) | WO2019012592A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06178475A (en) * | 1992-12-02 | 1994-06-24 | Aichi Emerson Electric Co Ltd | Magnet rotor |
| CN1514527A (en) * | 2002-11-29 | 2004-07-21 | ��ʽ�����װ | Combined stator core for electic rotary machinery |
| CN201781335U (en) * | 2010-08-17 | 2011-03-30 | 浙江大学 | Modular combined stator structure of motor |
| CN203368159U (en) * | 2013-06-08 | 2013-12-25 | 允博（天津）电机科技发展有限公司 | Combined type chip permanent magnet motor stator iron core |
| CN103797687A (en) * | 2011-06-28 | 2014-05-14 | 西门子能量股份有限公司 | Stator core module, stator core assembly and process for assembling a stator core assembly |
| CN105048660A (en) * | 2015-03-30 | 2015-11-11 | 台州市同兴机电科技有限公司 | Splicing type motor stator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6146851U (en) * | 1984-08-27 | 1986-03-28 | トヨタ自動車株式会社 | Motor magnetic pole retention structure |
| JP2011130602A (en) * | 2009-12-18 | 2011-06-30 | Yaskawa Electric Corp | Stator, and motor with the same |
| JP6232641B2 (en) * | 2014-01-31 | 2017-11-22 | 株式会社明電舎 | Manufacturing method of stator core |
-
2017
- 2017-07-10 WO PCT/JP2017/025184 patent/WO2019012592A1/en active Application Filing
- 2017-07-10 CN CN201780092881.6A patent/CN110832742B/en active Active
- 2017-07-10 JP JP2019529345A patent/JP6712095B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06178475A (en) * | 1992-12-02 | 1994-06-24 | Aichi Emerson Electric Co Ltd | Magnet rotor |
| CN1514527A (en) * | 2002-11-29 | 2004-07-21 | ��ʽ�����װ | Combined stator core for electic rotary machinery |
| CN201781335U (en) * | 2010-08-17 | 2011-03-30 | 浙江大学 | Modular combined stator structure of motor |
| CN103797687A (en) * | 2011-06-28 | 2014-05-14 | 西门子能量股份有限公司 | Stator core module, stator core assembly and process for assembling a stator core assembly |
| CN203368159U (en) * | 2013-06-08 | 2013-12-25 | 允博（天津）电机科技发展有限公司 | Combined type chip permanent magnet motor stator iron core |
| CN105048660A (en) * | 2015-03-30 | 2015-11-11 | 台州市同兴机电科技有限公司 | Splicing type motor stator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019012592A1 (en) | 2019-01-17 |
| JP6712095B2 (en) | 2020-06-17 |
| CN110832742A (en) | 2020-02-21 |
| JPWO2019012592A1 (en) | 2019-11-07 |
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