WO2006001216A1 - 回転電機の外転型回転子 - Google Patents
回転電機の外転型回転子 Download PDFInfo
- Publication number
- WO2006001216A1 WO2006001216A1 PCT/JP2005/011055 JP2005011055W WO2006001216A1 WO 2006001216 A1 WO2006001216 A1 WO 2006001216A1 JP 2005011055 W JP2005011055 W JP 2005011055W WO 2006001216 A1 WO2006001216 A1 WO 2006001216A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- resin
- magnet
- strength
- machine according
- Prior art date
Links
Classifications
-
- 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
-
- 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
- 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
Definitions
- the present invention relates to an abduction type rotor for a rotating electrical machine configured by inserting a permanent magnet into a magnet insertion hole formed in a rotor core.
- a rotary electric machine for example, an outer rotor type permanent magnet type motor (permanent magnet type motor) has a coil accommodated in a slot as disclosed in Japanese Patent Publication No. 182282.
- a stator formed in a cylindrical shape and a rotor positioned so as to face each other with a gap around the stator.
- a plurality of magnetic pole permanent magnets formed in an arc shape along the inner peripheral surface are fixed to the inner peripheral surface of the rotor by, for example, adhesion. Thereby, a magnetic pole is formed in the rotor.
- ferrite magnets having a high degree of freedom in forming (shape) and strength are widely used. Disclosure of the Invention
- Nd magnets rare earth-containing magnets with good magnetic properties
- the rotor core is formed by forming a rectangular magnet insertion hole for inserting the Nd magnet in the rotor core (laminated core) and inserting the Nd magnet into the magnet insertion hole.
- each member is integrated with a resin (mold material) with the Nd magnet inserted into the magnet insertion hole.
- thermosetting resin that is inexpensive and excellent in fluidity is used for this resin! Shi
- thermosetting resin has a narrow setting range of molding conditions, such as few types of additives used to improve physical properties. For this reason, it is difficult to change the physical properties (for example, strength and fluidity) of sallow. Therefore, for example, even if a thermosetting resin is used for a rotor core having a large number of laminated layers and a low strength, sufficient reinforcement and fixing may not be performed. As a result, there is a risk of adversely affecting the characteristics of the rotor and the rotating electrical machine.
- An object of the present invention is to provide an abduction type rotor for a rotating electrical machine that can sufficiently reinforce and fix a rotor core and a magnet even if the rotor core has low strength.
- the present invention includes a rotor core having a magnet insertion hole and a permanent magnet inserted into the magnet insertion hole, and the permanent magnet is integrated with the rotor core by a resin molding material.
- the resin is a thermoplastic resin.
- the abduction type rotor of the rotating electrical machine of the present invention can be sufficiently reinforced even with a low-strength rotor core because the physical properties of the outer rotor of the rotary electric machine can be changed widely using thermoplastic resin.
- the rotor core and the permanent magnet can be fixed, and the dimensional characteristics and thus the electrical characteristics can be stabilized.
- FIG. 1 shows an embodiment of the present invention, and is a cutaway perspective view showing an enlarged part of a rotor.
- FIG. 2 is a cutaway perspective view of the electric motor.
- FIG. 3 is a perspective view showing a state in which punched plates are stacked and a magnet insertion method.
- FIG. 4 is a cross-sectional view of a rotor positioned in a mold.
- FIG. 5 is a diagram showing the relationship between the tensile strength of the resin and the gap that can be maintained when the resin having each tensile strength is used.
- FIG. 6 is a graph showing the relationship between the elongation percentage of the fat and heat shock resistance.
- Fig.7 is maintained when using the resin with the flexural elasticity of each resin and the various elasticity It is a figure which shows the relationship with the gap which can be performed.
- FIG. 8 is a diagram showing the relationship between the impact strength of the resin and the gap that can be maintained when the resin having each impact strength is used.
- FIG. 9 is a diagram showing the relationship between the glass fiber ratio and the gear when a magnetic attractive force is applied by an Nd magnet.
- [0010] 5 is a rotor (external rotor), 8 is a rotor core, 12 is a magnet insertion hole, 14 is an Nd magnet (permanent magnet), and 18 is a molding material.
- FIG. 2 is a perspective view showing a part of the electric motor in a cutaway manner.
- the stator 1 includes a stator core 3 having a large number of teeth 2 radially, a stator grease X provided so as to cover the stator core 3, and a winding around each tooth 2.
- the stator wire 4 is made up of.
- the outer rotor 5 has a magnetic frame 6 in the shape of a circular container with an open upper surface.
- a shaft support 7 is fixed to the center of the frame 6.
- An annular wall 6a is provided on the opening side of the outer peripheral portion of the frame 6, and a rotor core 8 is disposed along the inner periphery of the annular wall 6a.
- the rotor core 8 is formed by punching an electromagnetic steel plate to form a punched plate 9 and laminating a plurality of the punched plates 9. Details of the manufacturing method of the rotor core 8 will be described later. In FIG. 2, for the sake of convenience of explanation, the later-described resin is not shown.
- FIG. 1 is a perspective view showing a part of a rotor with a part broken away, and FIG. 3 shows a state in which punched plates 9 are laminated and a method of inserting a magnet. 1 and 3 are upside down for convenience of explanation.
- the punching plate 9 has an annular yoke portion 10 and a magnetic pole portion 11 located on the inner peripheral side thereof, and a rectangular magnet insertion hole 12 (12a) is provided between the yoke portion 10 and the magnetic pole portion 11. 12b) is formed.
- the magnet insertion hole 12 (12a, 12b) is also formed with a semicircular resin introduction part 10a.
- the magnetism of the rectangular parallelepiped as a whole A stone insertion hole 12 is formed. Further, the magnetic pole part 11 is opposed to the stator core 3 of the stator 1 with the gap Y interposed therebetween.
- the first (lowermost in FIG. 3) and last (uppermost in FIG. 3) punched plates 9a and 9b include a yoke 10 and a magnetic pole 11 Is formed.
- the first punching plate 9a has a magnet insertion hole 12a that is narrower than the magnet insertion hole 12b formed in the other punching plate 9 (see FIGS. 1 and 4).
- the first punching plate 9a is located at the uppermost level in FIG. 1 and at the lowermost level in FIG.
- a permanent magnet for example, a magnetic powder containing Nd (neodymium), which is a rare earth, is sintered and formed into a rectangular shape. Magnet 14 is inserted from the direction of arrow A.
- Nd neodymium
- FIG. 4 shows a cross-sectional configuration of the rotor 5 positioned in the mold of the injection molding machine.
- the rotor iron core 8 is accommodated in the cavity 17 formed by the upper die 15 and the lower die 16 via the spacer C with the Nd magnet 14 inserted in the magnet insertion hole 12.
- the outer peripheral portion including the annular wall 6 a of the frame 6 is also accommodated in the cavity 17.
- PET polyethylene terephthalate
- the molding material 18 is formed between the magnet insertion hole 12 and the Nd magnet 14 (especially the resin introduction portion 10a), between the frame 6 and the rotor core 8, and the end face 6b ( It flows between both molds 15 and 16).
- the punching plates 9, the rotor core 8 and the Nd magnet 14, the frame 6 and the rotor core 8, and the frame 6 and the shaft support 7 are fixed by molding so as to cover the entire members.
- the polyethylene terephthalate as the base material of the molding material 18 is preferably within the range indicated by the broken line and the arrow in FIGS. 5 to 8, respectively, and the characteristics will be described in detail below. Light up.
- the polyethylene terephthalate shown in FIGS. 5 to 8 is supplemented with 30% by weight glass fiber.
- Figure 5 shows the relationship between the tensile strength (MPa) possessed by the resin and the dimension (mm) of the gap Y that can be maintained when using the resin having each tensile strength.
- the size of the gap Y affects the characteristics of the permanent magnet motor, and is generally considered to be about 1. Omm on average. At least about 0.6mm is required. Therefore, the physical properties of the polyethylene terephthalate used in the present embodiment are obtained even when a tensile force of about lOOMPa (assuming a tensile force in the inner peripheral direction due to the magnetic attraction force) in the inner peripheral direction of the rotor 5 is obtained. It should be able to maintain a gap Y of about 0.6mm.
- the polyethylene terephthalate used in this embodiment needs to have a tensile strength of at least lOOMPa or more, preferably 120 MPa or more.
- FIG. 6 shows the relationship between the elongation rate (%) of resin and heat shock resistance (cycle). Since the elongation rate affects the fluidity of coconut oil, it is generally considered to be 3.0% or more. Accordingly, the physical properties of the polyethylene terephthalate in the present embodiment should be capable of maintaining an elongation of about 3.0%, preferably 3.0% or more, even when a heat shock of 200 cycles or more is applied. 3. If the elongation rate of about 0% cannot be maintained, the resin cannot reach every corner of the cavity 17 and the rotor 5 cannot be securely reinforced or fixed. Cracks and the like are caused by the difference in heat shrinkage.
- Fig. 7 shows the relationship between the flexural elastic strength (GPa) possessed by the resin and the dimension (mm) of the gap Y that can be maintained when the resin having each bending elastic strength is used. Showing Also in this bending property, the physical properties of the polyethylene terephthalate according to the present embodiment, for example, were able to capture a bending stress of about 6 GPa in the inner circumferential direction of the rotor 5 (assuming a bending stress in the inner circumferential direction due to a magnetic attractive force). Even in such a case, it is preferable that a gap Y of about 0.6 mm can be maintained.
- Polyethylene terephthalate which cannot maintain the gap Y dimension of about 0.6 mm, cannot be sufficiently reinforced or fixed to the rotor 5.
- the polyethylene terephthalate used in this embodiment needs to have a bending elastic strength of at least 6 GPa or more, preferably 7 GPa or more.
- Fig. 8 shows the relationship between the impact strength CiZm of the resin and the dimension (mm) of the gap Y that can be maintained when using the resin having each impact strength.
- the polyethylene terephthalate of this embodiment can maintain a gap Y of about 0.6 mm even when an impact stress of about 120 jZm is applied in the inner circumferential direction of the rotor 5, for example.
- Polyethylene terephthalate, which cannot maintain the gap Y dimension of about 0.6 mm, cannot be sufficiently reinforced or fixed to the rotor 5.
- the polyethylene terephthalate used in this embodiment needs to have an impact strength of at least 120 jZm.
- an additive such as a glass fiber filler is added to polyethylene terephthalate which is a base material of the molding material 18 used in the present embodiment.
- the amount of glass fiber added to the molding material 18 (glass fiber ratio) at this time will be described with reference to FIG.
- FIG. 9 shows the relationship between the glass fiber ratio (% by weight) and the gap Y (mm) when the magnetic attractive force in the inner circumferential direction by the Nd magnet 14 is applied to the rotor 5.
- the glass fiber ratio is less than 20% by weight, the physical properties are not so improved.
- it exceeds 40% by weight a suitable fluidity cannot be obtained, which causes a cavity in the cavity 17 and the strength of the entire rotor 5 may be reduced.
- the rotor core 8 and the Nd magnet 14 are integrated in the cavity 17 by the molding material 18 to which glass fiber of 20 gravity% to 40% by weight is added.
- the molding material 18 is used even when the strength of the rotor core 8 is reduced by forming the magnet insertion holes 12 in the laminated rotor cores 8. Since the Nd magnet 14 is integrated with the rotor core 8 and the rotor core 8 itself is integrated, the reinforcement and the fixing of each member can be performed, and the dimensional characteristics of the rotor 5 As a result, the torque characteristics, rotation speed characteristics, power consumption characteristics, efficiency, etc. of the permanent magnet motor can be stabilized.
- the resin that is the base material of the molding material 18 is polyethylene terephthalate, which is a thermoplastic resin, and 20% by weight to 40% by weight of glass fiber is added to the resin.
- the strength of the molding material 18 itself is increased, and a gap Y of about 0.6 mm, which is the minimum required even when a magnetic attractive force is applied, can be maintained.
- thermoplastic resin such as polyethylene terephthalate
- the thermoplastic resin can be appropriately adjusted in fluidity according to its type, additive type, amount, etc., it is possible to reduce burrs generated at the joint of the mold. it can.
- the thermoplastic resin can shorten the curing time compared to the thermosetting resin.
- the rotor 5 may be configured without the frame 6.
- thermoplastic resin in addition to polyethylene terephthalate, for example, polybutylene terephthalate such as polybutylene terephthalate may be used as long as it has physical properties within the range shown in FIGS. If it can improve the strength of the material moderately.
- the outer rotor of a rotating electrical machine that is useful in the present invention is useful for a rotating electrical machine whose strength has been reduced by forming a magnet insertion hole in the rotor core.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020067027362A KR100889892B1 (ko) | 2004-06-28 | 2005-06-16 | 회전 전기 장치의 외전형 회전자 |
CNB2005800201601A CN100533918C (zh) | 2004-06-28 | 2005-06-16 | 旋转电机的外转式转子 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-189590 | 2004-06-28 | ||
JP2004189590A JP2006014520A (ja) | 2004-06-28 | 2004-06-28 | 回転電機の外転型回転子 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006001216A1 true WO2006001216A1 (ja) | 2006-01-05 |
Family
ID=35781078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/011055 WO2006001216A1 (ja) | 2004-06-28 | 2005-06-16 | 回転電機の外転型回転子 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP2006014520A (ja) |
KR (1) | KR100889892B1 (ja) |
CN (1) | CN100533918C (ja) |
TW (1) | TWI289378B (ja) |
WO (1) | WO2006001216A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022070478A1 (en) * | 2020-09-30 | 2022-04-07 | Hapsmobile Inc. | Methods and systems for bonding magnets to a rotor of an electric motor |
WO2022070476A1 (en) * | 2020-09-30 | 2022-04-07 | Hapsmobile Inc. | Methods and systems for bonding a rotor lamination stack to a rotor housing of an electric motor |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100977472B1 (ko) | 2008-09-10 | 2010-08-27 | (주)키네모숀 | 자석 고정부재 및 이를 포함하는 영구자석 매입형 회전자 |
IT1400343B1 (it) * | 2010-05-27 | 2013-05-24 | Idm Srl | Gruppo elettrogeno, particolarmente per caricabatterie. |
JP2012213310A (ja) * | 2011-03-18 | 2012-11-01 | Toyota Industries Corp | 電動圧縮機 |
KR101246912B1 (ko) * | 2011-12-12 | 2013-03-25 | 한국생산기술연구원 | 외전형 발전기 |
JP5451934B1 (ja) * | 2012-11-06 | 2014-03-26 | 株式会社三井ハイテック | 積層鉄心の製造方法 |
JP6685166B2 (ja) * | 2016-04-06 | 2020-04-22 | 株式会社日立産機システム | アキシャルギャップ型回転電機 |
CN107516958B (zh) * | 2016-06-15 | 2020-12-01 | 德昌电机(深圳)有限公司 | 转子、具有该转子的电机及电动工具 |
JP7212587B2 (ja) * | 2019-06-20 | 2023-01-25 | 株式会社日立産機システム | アキシャルギャップ型回転電機 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0439047U (ja) * | 1990-07-27 | 1992-04-02 | ||
JPH08182282A (ja) * | 1994-12-27 | 1996-07-12 | Railway Technical Res Inst | 車両用永久磁石励磁同期電動機 |
JP2001258189A (ja) * | 2000-03-15 | 2001-09-21 | Toshiba Corp | 永久磁石モータと縦軸形洗濯機及び横軸形洗濯機 |
JP2004147451A (ja) * | 2002-10-25 | 2004-05-20 | Toshiba Corp | 外転形永久磁石モータの回転子 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW364234B (en) * | 1997-04-14 | 1999-07-11 | Sanyo Electric Co | Rotor for an electric motor |
JP2002101586A (ja) * | 2000-09-25 | 2002-04-05 | Toshiba Kyaria Kk | 電動機の回転子 |
KR100766581B1 (ko) * | 2001-04-03 | 2007-10-15 | 뉴모텍(주) | 열가소성수지가 몰드된 모터 고정자 및 그 제조방법 |
-
2004
- 2004-06-28 JP JP2004189590A patent/JP2006014520A/ja not_active Abandoned
-
2005
- 2005-06-16 CN CNB2005800201601A patent/CN100533918C/zh active Active
- 2005-06-16 KR KR1020067027362A patent/KR100889892B1/ko not_active IP Right Cessation
- 2005-06-16 WO PCT/JP2005/011055 patent/WO2006001216A1/ja active Application Filing
- 2005-06-27 TW TW094121475A patent/TWI289378B/zh not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0439047U (ja) * | 1990-07-27 | 1992-04-02 | ||
JPH08182282A (ja) * | 1994-12-27 | 1996-07-12 | Railway Technical Res Inst | 車両用永久磁石励磁同期電動機 |
JP2001258189A (ja) * | 2000-03-15 | 2001-09-21 | Toshiba Corp | 永久磁石モータと縦軸形洗濯機及び横軸形洗濯機 |
JP2004147451A (ja) * | 2002-10-25 | 2004-05-20 | Toshiba Corp | 外転形永久磁石モータの回転子 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022070478A1 (en) * | 2020-09-30 | 2022-04-07 | Hapsmobile Inc. | Methods and systems for bonding magnets to a rotor of an electric motor |
WO2022070476A1 (en) * | 2020-09-30 | 2022-04-07 | Hapsmobile Inc. | Methods and systems for bonding a rotor lamination stack to a rotor housing of an electric motor |
Also Published As
Publication number | Publication date |
---|---|
TWI289378B (en) | 2007-11-01 |
CN1969441A (zh) | 2007-05-23 |
TW200618443A (en) | 2006-06-01 |
KR20070024654A (ko) | 2007-03-02 |
KR100889892B1 (ko) | 2009-03-20 |
JP2006014520A (ja) | 2006-01-12 |
CN100533918C (zh) | 2009-08-26 |
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