WO2008056532A1 - Moteur à rotor extérieur et procédé de fabrication associé - Google Patents
Moteur à rotor extérieur et procédé de fabrication associé Download PDFInfo
- Publication number
- WO2008056532A1 WO2008056532A1 PCT/JP2007/070565 JP2007070565W WO2008056532A1 WO 2008056532 A1 WO2008056532 A1 WO 2008056532A1 JP 2007070565 W JP2007070565 W JP 2007070565W WO 2008056532 A1 WO2008056532 A1 WO 2008056532A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor magnet
- yoke
- rotor
- magnet
- rotor motor
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
- H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2791—Surface mounted magnets; Inset magnets
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
- Y10T29/49012—Rotor
Definitions
- the present invention relates to an outer rotor motor and a manufacturing method thereof.
- FIG. 10 is a perspective view showing a configuration of a main part of a conventional outer rotor motor 9.
- the outer rotor motor 9 includes a ring-shaped rotor magnet 926 in which magnetic poles alternate alternately along the circumferential direction, and a ring-shaped yoke 924 that covers the radially outer surface of the rotor magnet 926.
- the outer rotor motor 9 includes a stator having a stator core 942 that extends radially outward in the radial direction and has a coil wound around a tooth 9422 that faces the radial inner surface 926i of the rotor magnet 926 at the tip.
- Patent documents;! To 3 are prior art documents relating to a conventional outer rotor motor, and disclose a technique of covering a radially outer surface of a rotor magnet with a yoke.
- Patent Document 1 Japanese Patent No. 3580878
- Patent Document 2 JP 2005-198447 A
- Patent Document 3 Japanese Patent Application Laid-Open No. 2001_244110
- the outer rotor motor 9 is different from the inner rotor motor in that the gap between the radial inner surface 926i of the rotor magnet 926 and the tip of the teeth 9422 is exposed to the outside. ing.
- iron powder attracted by leakage magnetic flux or the like unless a special measure is taken such as providing a cover that shields the gap from the outside or reducing the area of the passage from the outside to the gap. In some cases, the foreign matter entered the gap, and this foreign matter could cause abnormal noise during operation.
- FIG. 11 is a schematic diagram showing the rotor magnet 926 and the stator core 942 viewed from the radially inner side
- FIG. 12 is a schematic diagram showing the rotor magnet 926, the yoke 924, the stator core 942 and the coil 944 viewed from the circumferential direction. is there.
- the outer rotor motor 9 as shown in FIG. 11, there is a leakage magnetic flux LM that exits from one magnetic pole of the rotor magnet 926 in the axial upper side 926u and the axial lower side 926d and enters the other magnetic pole. To do.
- the outer rotor motor 9 as shown in FIG.
- the leakage magnetic flux exits from the periphery of the radially inner side surface 926i of the rotor magnet 926 and enters the axial upper side surface 926 or the axial lower side surface 926d of the rotor magnet 926.
- LM exists. These leakage magnetic fluxes LM become particularly prominent when the axial width of the rotor magnet 926 is expanded until both ends of the rotor magnet 926 in the axial direction reach the vicinity of the coil end of the coil 944 wound around the teeth 9422. .
- the present invention reduces the leakage magnetic flux in an outer rotor motor, and effectively prevents foreign matters such as iron powder from being mixed without taking the special measures described above.
- a first aspect of the outer rotor motor (1) is a ring-shaped rotor magnet (126) whose magnetic poles alternate alternately along the circumferential direction, and the radial direction of the rotor magnet (126).
- a rotor (12) having a yoke (124) covering a portion of the outer side surface (126e) and the axial side surfaces (126u, 126d) closer to the outer side in the radial direction, and a radially inner side surface of the rotor magnet (126) ( 126i) and a stator (14) around which a coil (144) is wound around a tooth (1422) facing the same.
- a second aspect of the outer rotor motor (1) according to the present invention is the first aspect of the outer rotor motor, wherein the radial outer side surface (126e) force is also applied to the axial side surface (126u, 126d). ) Of the continuous area extending radially outward with the yoke (124) without interruption.
- a third aspect of the outer rotor motor (1) according to the present invention is the first aspect or the second aspect of the outer rotor motor, wherein the rotor magnet (126) is made of a plastic magnet.
- a first aspect of the method of manufacturing the outer rotor motor (1) according to the present invention includes a ring-shaped rotor magnet (126), a radially outer surface (126e) of the rotor magnet (126), and an axial direction. Integrate the yoke (124) that covers the outer side of the side (126u, 126d) in the radial direction. At the same time as or after the integration of the rotor magnet (126) and the yoke (124), the rotor magnet is mounted so that the magnetic poles alternate alternately along the circumferential direction.
- the leakage magnetic flux can be reduced, so that foreign matters such as iron powder can be effectively prevented from being mixed.
- the leakage magnetic flux can be further reduced, so that foreign matters such as iron powder can be more effectively prevented.
- the rotor magnet can be integrally formed with other members, so that the productivity of the outer rotor motor can be improved.
- the leakage magnetic flux at the time of magnetization can be reduced, so that the magnetization magnetic flux can be increased and magnetized. Difficult rotor magnet ends can be magnetized efficiently.
- FIG. 1 is a cross-sectional view showing a schematic configuration of an outer rotor motor according to a preferred embodiment of the present invention and a cross flow fan for a room air conditioner indoor unit rotated by the outer rotor motor.
- FIG. 2 is a perspective view showing a configuration of a main part of the outer rotor motor.
- FIG. 3 is a schematic view showing a rotor magnet, a yoke and a stator core as seen from the inside in the radial direction.
- FIG. 4 is a schematic diagram showing a rotor magnet, a yoke, a stator core, and a coil viewed from the circumferential direction.
- FIG. 5 is a schematic view showing a rotor magnet and a yoke viewed from the circumferential direction.
- FIG. 6 is a schematic view showing a rotor magnet and a yoke viewed from the circumferential direction.
- FIG. 7 is a schematic diagram showing a rotor magnet and yoke viewed from the circumferential direction of an outer rotor motor without a yoke.
- FIG. 8 is a flowchart illustrating a method for manufacturing the outer rotor motor.
- FIG. 9 is a schematic view showing a rotor magnet and a yoke viewed from the circumferential direction.
- FIG. 10 is a perspective view showing a configuration of a main part of a conventional outer rotor motor.
- FIG. 11 is a schematic diagram showing a rotor magnet and a stator core viewed from the inside in the radial direction.
- FIG. 12 is a schematic diagram showing a rotor magnet, a yoke, a stator core, and a coil viewed from the circumferential direction.
- FIG. 1 is a cross-sectional view showing a schematic configuration of an outer rotor motor 1 according to a preferred embodiment of the present invention and a crossflow fan 5 for a room air conditioner indoor unit rotated by the outer rotor motor 1.
- FIG. 2 is a perspective view showing the configuration of the main part of the outer rotor motor 1.
- the outer rotor motor 1 includes a rotor 12 that rotates around an axis A1 and a fixed stator 14.
- the rotor 12 includes a cup-type fan connecting resin member 122 having a cylindrical portion 122c having a cylindrical axis coinciding with the axis A1 and a disc portion 122d perpendicular to the axis A1.
- the fan connecting resin member 122 is made of a non-magnetic resin.
- a ring-shaped yoke 124 On the inner peripheral surface of the cylindrical portion 122c, there are a ring-shaped yoke 124, a ring-shaped rotor magnet 126 fixed to a fixing groove formed on the radially inner side surface of the yoke 124, and a rotor magnet 126.
- a yoke 128 fixed to a fixing groove formed on the radially inner side surface 126i is disposed.
- the yoke 124 is made of a magnetic material such as iron.
- the rotor magnet 126 is magnetized so that the magnetic poles alternate alternately along the circumferential direction.
- the rotor magnet 126 is composed of a plastic magnet in which magnet powder is bonded with resin.
- the rotor magnet 126 is made of a plastic magnet
- the fan connecting resin member 122, the yoke 124, and the rotor magnet 126 can be integrally formed by injection molding.
- the rotor magnet 126 it is not essential that the rotor magnet 126 be made of a plastic magnet if it is not premised on integral molding.
- One fixing groove of the rotor magnet 126 is formed for each magnetic pole.
- a shaft 129 extending in the direction of the axis A1 is fixed to the center of the disc part 122d.
- Shaft 1 29 is rotatably held by the shaft receiver.
- the disc part 122d also serves as an end plate for fixing the plurality of wing parts 52 of the crossflow fan 5 at the end parts.
- the stator 14 is accommodated in the cylindrical portion 122c.
- the stator 14 extends radially outwardly and has a stator core 142 having teeth 1422 facing the radially inner side surface 126i of the rotor magnet 126 at the tip, and a coil 144 wound around each of the teeth 1422 (see FIG. 1 and FIG. 2 (not shown, see FIG. 4 described later).
- the tip of the tooth 1422 extends in the circumferential direction in order to increase the flux linkage.
- Stator core 142 is made of a magnetic material such as iron.
- the coil 144 can be wound in either concentrated or distributed winding.
- FIG. 3 is a schematic diagram showing the rotor magnet 126, yokes 124, 128 and the stator core 142 as seen from the inside in the radial direction.
- Fig. 4 shows the rotor magnet 126, yokes 124, 128 and the stator core 142 as seen from the circumferential direction.
- 4 is a schematic diagram showing a coil 144.
- the yoke 124 is formed on the outer surface 12 of the rotor magnet 126 in the radial direction.
- the yoke 124 is provided on the radially outer surface 1 of the rotor magnet 126.
- the yoke 124 is located closer to the radially outer side of the axially upper side surface 126u and the axially lower side surface 126d of the rotor magnet 126.
- a part near the radially outer side means that the tip force of the projecting portion 1242 projecting radially inward at the axial upper end and the axial lower end of the yoke 124 is the diameter of the rotor magnet 126. This is intended to prevent the axially upper side surface 126i from reaching the axially upper side surface 126u and the axially lower side surface 126d. As shown in FIG. 9, when the protruding portion 8242 reaches the radially inner surface 826i of the rotor magnet 826, the peripheral edge of the radially inner surface 826i of the rotor magnet 826 and the tip of the protruding portion 8242 approach each other.
- FIG. 9 is a schematic diagram showing the rotor magnet 826 and the yokes 824 and 828 as seen from the circumferential direction, as in FIG.
- the range covered by the yoke 124 is not particularly limited unless it is "all".
- the bundle can be reduced particularly effectively.
- FIGS. 1 to 4 a continuous range from the radially outer side surface 126e of the rotor magnet 126 to the radially outer side of the axial upper side surface 126u (axially lower side surface 126d) is provided by the integral yoke 124.
- the case of covering without interruption is illustrated. This is the force that is the most desirable form from the viewpoint of reducing leakage magnetic flux.
- the yoke 124 (124a) covering the axial upper side 126u (axial lower side 126d) and the radial outer side 126e Leakage magnetic flux can be reduced even if the yoke 124 (124b) that covers the substrate is separated. Therefore, the embodiment of the yoke 124 as shown in FIG. 5 is also included in the present invention.
- FIG. 5 is a schematic diagram showing the rotor magnet 126 and the yokes 124 and 128 viewed from the circumferential direction, similarly to FIG.
- the leakage magnetic flux can be reduced, so that it is possible to effectively prevent contamination of foreign matters such as iron powder without taking special measures. wear.
- the yoke 128 covers a part of the center of the radially inner side face 126 i of the rotor magnet 126.
- the magnetic flux emitted from the peripheral edge of the radially inner side surface 126 i of the rotor magnet 126 is directed toward the center, and the leakage of magnetic flux in the radial direction can be reduced.
- the range of the radially inner side surface 126i covered by the yoke 128 is not particularly limited, but if it is made slightly wider than the range facing the tip of the teeth 1 422, the leakage flux can be reduced and the interlinkage flux Can be increased.
- FIG. 6 is a schematic diagram showing the rotor magnet 126 and the yokes 124 and 128 viewed from the circumferential direction, as in FIG.
- FIG. 7 is a schematic diagram showing the rotor magnet 126 and the yoke 124 as seen from the circumferential direction, as in FIG.
- step S101 the fan connecting resin member 12, the yoke 124, and the rotor magnet 126 are integrally formed by injection molding.
- step S102 the rotor magnet 126 is magnetized. In this way, if magnetization is performed in a state where the rotor magnet 126 and the yoke 124 are integrated, the leakage magnetic flux at the time of magnetization can be reduced, so that the magnetization magnetic flux can be increased. The end of the rotor magnet 126 that is difficult to magnetize can be magnetized efficiently.
- step S103 the yoke 128 is fixed to the bottom of the fixing groove formed on the radially inner side surface 126i of the rotor magnet 126 with an adhesive (step S103), and the shaft 129 is fixed to the center of the disc portion 122d.
- step S104 the rotor 12 is completed.
- the rotor magnet 126 is molded by injection molding, and the rotor magnet 126 is magnetized at the same time. (2) After that, the magnetized rotor is magnetized. The magnet 126 is press-fitted into a fixing groove formed on the radially inner side surface of the yoke 124. (3) Furthermore, the fan connecting resin member 122 is integrally formed with the yoke 124 and the rotor magnet 126. (4) Finally, Alternatively, the yoke 128 may be fitted into the bottom of the fixing groove formed on the radially inner side surface 126i of the rotor magnet 126.
- the object to be rotated by the outer rotor motor 1 of the present invention may be another type of fan such as a propeller fan, which is not necessarily a cross flow fan 5 for a room air conditioner indoor unit. Further, the present invention may be applied to an outer rotor motor that rotates other than a fan such as a spindle motor for a hard disk drive device.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2007318707A AU2007318707B2 (en) | 2006-11-06 | 2007-10-22 | Outer rotor motor and method of producing the same |
US12/446,254 US8400039B2 (en) | 2006-11-06 | 2007-10-22 | Outer rotor motor and method of manufacturing the same |
CN2007800396153A CN101529695B (zh) | 2006-11-06 | 2007-10-22 | 外转子电动机及其制造方法 |
EP07830299.9A EP2081277B1 (en) | 2006-11-06 | 2007-10-22 | Outer rotor motor and method of producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006300194A JP4175417B2 (ja) | 2006-11-06 | 2006-11-06 | アウターロータモータ及びその製造方法 |
JP2006-300194 | 2006-11-06 |
Publications (1)
Publication Number | Publication Date |
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WO2008056532A1 true WO2008056532A1 (fr) | 2008-05-15 |
Family
ID=39364355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/070565 WO2008056532A1 (fr) | 2006-11-06 | 2007-10-22 | Moteur à rotor extérieur et procédé de fabrication associé |
Country Status (7)
Country | Link |
---|---|
US (1) | US8400039B2 (ja) |
EP (1) | EP2081277B1 (ja) |
JP (1) | JP4175417B2 (ja) |
KR (1) | KR101030401B1 (ja) |
CN (1) | CN101529695B (ja) |
AU (1) | AU2007318707B2 (ja) |
WO (1) | WO2008056532A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5401881B2 (ja) * | 2008-09-18 | 2014-01-29 | ダイキン工業株式会社 | 界磁子及び回転電機 |
AU2013364501B2 (en) * | 2012-12-21 | 2017-09-14 | Fisher & Paykel Appliances Limited | A motor |
JP5928642B2 (ja) * | 2014-07-01 | 2016-06-01 | ダイキン工業株式会社 | 電機子、回転電機、クロスフローファン、電機子のティース対の製造方法 |
DE102015203995A1 (de) * | 2015-03-05 | 2016-09-08 | Mahle International Gmbh | Außenrotor einer Vorrichtung zur berührungslosen Übertragung von Drehbewegungen |
JP6172234B2 (ja) * | 2015-10-15 | 2017-08-02 | ダイキン工業株式会社 | 電動機および送風装置 |
WO2020170737A1 (ja) * | 2019-02-22 | 2020-08-27 | 日本電産株式会社 | 送風装置 |
JP2020137330A (ja) * | 2019-02-22 | 2020-08-31 | 日本電産株式会社 | モータ、送風装置 |
KR20200114887A (ko) | 2019-03-29 | 2020-10-07 | 엘지전자 주식회사 | 아우터 로터 타입의 모터 |
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JPS5822571A (ja) * | 1981-07-29 | 1983-02-09 | Japan Servo Co Ltd | 直流無刷子電動機 |
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JPH0756616Y2 (ja) * | 1990-08-07 | 1995-12-25 | 株式会社ゼクセル | モータのロータマグネットの着磁構造 |
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-
2006
- 2006-11-06 JP JP2006300194A patent/JP4175417B2/ja not_active Expired - Fee Related
-
2007
- 2007-10-22 KR KR1020097007410A patent/KR101030401B1/ko active IP Right Grant
- 2007-10-22 EP EP07830299.9A patent/EP2081277B1/en active Active
- 2007-10-22 AU AU2007318707A patent/AU2007318707B2/en active Active
- 2007-10-22 CN CN2007800396153A patent/CN101529695B/zh active Active
- 2007-10-22 US US12/446,254 patent/US8400039B2/en active Active
- 2007-10-22 WO PCT/JP2007/070565 patent/WO2008056532A1/ja active Application Filing
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JPS5822571A (ja) * | 1981-07-29 | 1983-02-09 | Japan Servo Co Ltd | 直流無刷子電動機 |
JP3580878B2 (ja) | 1994-12-28 | 2004-10-27 | 日本電産株式会社 | ファンモータ |
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Non-Patent Citations (1)
Title |
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See also references of EP2081277A4 |
Also Published As
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AU2007318707B2 (en) | 2010-11-04 |
JP4175417B2 (ja) | 2008-11-05 |
US20100314954A1 (en) | 2010-12-16 |
CN101529695B (zh) | 2012-07-04 |
AU2007318707A1 (en) | 2008-05-15 |
KR101030401B1 (ko) | 2011-04-20 |
EP2081277B1 (en) | 2018-05-02 |
US8400039B2 (en) | 2013-03-19 |
JP2008118789A (ja) | 2008-05-22 |
EP2081277A4 (en) | 2016-10-05 |
KR20090055029A (ko) | 2009-06-01 |
CN101529695A (zh) | 2009-09-09 |
EP2081277A1 (en) | 2009-07-22 |
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