CN1681185B - Brushless DC motor rotor - Google Patents
Brushless DC motor rotor Download PDFInfo
- Publication number
- CN1681185B CN1681185B CN2005100629866A CN200510062986A CN1681185B CN 1681185 B CN1681185 B CN 1681185B CN 2005100629866 A CN2005100629866 A CN 2005100629866A CN 200510062986 A CN200510062986 A CN 200510062986A CN 1681185 B CN1681185 B CN 1681185B
- Authority
- CN
- China
- Prior art keywords
- rotor
- utmost point
- plastic magnet
- rotor core
- magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920003023 plastic Polymers 0.000 claims abstract description 43
- 239000004033 plastic Substances 0.000 claims abstract description 43
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
-
- 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
- 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
- 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
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The present invention is to provide a rotor of a motor in which the number of a plastic magnet can be reduced and the magnet does not rotate about the rotor core. Plastic magnets 16 of the S pole andthe N pole are arranged on the outer circumferential side of a rotor 10. The plastic magnet 16 of each pole has a substantially semicircular cross-sectional shape on the inner circumferential side. The plastic magnets 16 of the poles are coupled in a ring-shape and a recess 14 corresponding the plastic magnet 16 of each pole is formed in the outer circumferential part of a rotor core 12.
Description
Technical field
The present invention relates to the rotor of motor such as brushless DC motor (Block ラ シ レ ス DC モ one タ), single-phase synchronous motor.
Background technology
The rotor of motor such as brushless DC motor is in order to obtain the form (reference example such as patent documentation 1) that magnetic force becomes the S utmost point and the N utmost point to replace configurations of magnets.
In such rotor, the rotor of the SPM type (SURFACE PERMANENT MAGNET type) at the surface configuration magnet of rotor core is arranged.
Patent documentation 1: TOHKEMY 2004-48827 communique
The employed magnet of the rotor of SPM type as described above, mostly being ferrite is plastic magnet, interior external diameter is concentric annular, and is integrally formed or constitute ordinatedly with rotor core.And,, the field orientation of each diversity of magnetic pole is set at each predetermined angular.
In such toroidal magnet, irrespectively more weak at the boundary member of the S utmost point and the N utmost point with the power of orientation, use with the center of each magnet, be the magnet of the center same amount of magnetic pole.
When the magnet that uses in this wise with the center same amount of magnetic pole, exist the amount of plastic magnet to increase, the problem that cost improves.
In addition,, when more weak, exist only rotor core to rotate to the cooperation of rotor core owing to be the magnet of annular, or the problem of toroidal magnet rotation only.
Summary of the invention
The present invention provides the rotor of the brushless DC motor that a kind of amount that can reduce plastic magnet and magnet do not rotate relative to rotor core in view of the above problems.
The invention of technical scheme 1, be with the rotor outer circumferential side be magnetized to S extremely in all sides be magnetized to the plastic magnet of the N utmost point and described rotor outer circumferential side be magnetized to N extremely in all sides plastic magnet one utmost point one utmost point of being magnetized to the S utmost point alternately be arranged on the rotor of the brushless DC motor on the outer peripheral face of rotor core, wherein, to be formed for the axis hole of axle at the central part of described rotor core and form a plurality of semicircular recesses in the mode of five equilibrium configuration and to constitute the steel plate of star stacked at peripheral part, the section configuration of interior all sides of the plastic magnet of described each utmost point has formed semicircular a plurality of protuberances that central portion is swelled, the plastic magnet of described each utmost point forms as one ringwise, and described plastic magnet and described rotor core are integrally formed.
In the present invention, the section configuration of interior all sides of the plastic magnet of described each utmost point is for roughly semicircle.
In the present invention, the plastic magnet of described each utmost point and described rotor core are integrally formed.
In the present invention, described rotor core is a cydariform, axially has a curvilinear recess at its peripheral part.
In the present invention, described motor is a brushless DC motor.
In the present invention, described motor is a single-phase synchronous motor.
In the rotor of the motor of the invention of claim 1, though plastic magnet is an annular, but the section configuration of interior all sides of the plastic magnet of each utmost point is the curve form that makes central portion swell, become thin more by the end more, so compare the amount of use with the annular plastics magnet of prior art few, in addition, the magnetization waveform of magnetic flux is near sinusoidal wave, and the characteristic of motor improves, and then, the situation of rotating relative to rotor core can not appear.
According to the present invention because the section configuration of the plastic magnet of each utmost point is for roughly semicircle, so the magnetization waveform of magnetic flux near sinusoidal wave, the characteristic raising of motor.
According to the present invention,, can more positively cooperate with rotor core plastic magnet because the plastic magnet and the rotor core of each utmost point are integrally formed, easy to manufacture.
According to the present invention, because rotor core is cydariform, so the plastic magnet relative stator iron core that each utmost point can not occur coming off in the axial direction.
According to the present invention,, can improve the characteristic of motor because motor is a brushless DC motor.
According to the present invention,, can improve the characteristic of motor because motor is a single-phase synchronous motor.
Description of drawings
Fig. 1 is the figure of the flat shape of the rotor of expression the present invention one example.
Fig. 2 is the A-A line sectional view of Fig. 1.
Embodiment
Below, with reference to Fig. 1 and Fig. 2 the rotor 10 of the present invention's one example is described.
The rotor 10 of this example is the rotor of brushless DC motor, is configured in interior all sides of annular stator.
The structure of rotor 10
Structure and its manufacture method to rotor 10 together describe.
At first, make the rotor core 12 of rotor 10.
As shown in Figure 1, the flat shape of rotor core 12, by the star steel plate that the peripheral part in circle is provided with 8 semicircular recesses 14 carry out stacked, the riveted joint make.At this moment, as shown in Figure 2, for forming the such shape of recess, global shape is a cydariform to the axial shape of rotor core 12 at axial central portion.
Then, the above-mentioned rotor core that makes like that 12 is received into metal die inside, the ferrite that is formed with each utmost point at the peripheral part of rotor core 12 integratedly is a plastic magnet 16.In addition, make axle 18 as rotation axis connect centers in rotor core 12.At this moment, as shown in Figure 1, the plastic magnet 16 of each utmost point is the annular that links with the end, and shape of all sides and recess 14 is coincide in it, and section configuration is the curve form that central portion swells, becomes thin more by the end more, and is promptly roughly semicircle.It is the circular concentric at center that the section configuration of the outer circumferential side of the plastic magnet 16 of each utmost point becomes with axle 18.
The interior perimembranous of metal die is magnetized or is disposed permanent magnet, makes the plastic magnet 16 of each utmost point alternately be magnetized to the S utmost point and the N utmost point.
The above-mentioned rotor 10 that is shaped is integratedly like that taken out from metal die.
The effect of rotor 10
Above-mentioned rotor 10 has following such effect.
As the 1st effect, to compare with the situation of the annular plastics magnet that uses prior art, the use amount of the plastic magnet 16 of each utmost point reduces, can cutting down cost.Promptly, as shown in Figure 1, if the words of the annular plastics magnet of the circular concentric of prior art, be necessary to use plastic magnet until the position shown in the dotted line 20, but at this example because plastic magnet 16 is configured to the shaped form of coincideing with recess 14, so can reduce the use amount of the so much plastic magnet 16 of the use amount that is equivalent to Fig. 1 intermediate cam shape than prior art.
As the 2nd effect, owing at the peripheral part of rotor core 12 recess 14 is set, the shape of plastic magnet 16 for being mated can not rotated relative to rotor core 12 so connect into the plastic magnet 16 of annular.That is, play the effect of this recess 14 of stop.
As the 3rd effect, because rotor core 12 be cydariform, so can prevent the disengaging of plastic magnet 16 on Fig. 2 axial.
As the 4th effect and since interior all sides of the plastic magnet 16 of each utmost point be shaped as semicircle, so the magnetization waveform of magnetic flux near sinusoidal wave, the characteristic of motor improves.
(modified example)
The invention is not restricted to above-mentioned example, only otherwise breaking away from its purport can carry out various changes.
Modified example 1
Is integrally formed at above-mentioned example rotor unshakable in one's determination 12 with plastic magnet 16, but also can not be shaped like this, can be the manufacturing process that is inserted into the blank part at its center after the plastic magnet 16 that formerly only is shaped, with rotor core 12.
Modified example 2
In above-mentioned example, used brushless DC motor, but also be not limited thereto,, for example, also can be used in the rotor of single-phase synchronous motor if rotor uses the words of permanent magnet also can be suitable for the present invention as motor.
Industrial applicibility
The present invention is applicable to the rotor of brushless direct current motor, single-phase synchronous motor etc.
Claims (2)
1. the rotor of a brushless DC motor, with the outer circumferential side of rotor be magnetized to S extremely in all sides be magnetized to the plastic magnet of the N utmost point and described rotor outer circumferential side be magnetized to N extremely in all sides plastic magnet one utmost point one utmost point of being magnetized to the S utmost point alternately be arranged on the outer peripheral face of rotor core, it is characterized in that
To be formed for the axis hole of axle at the central part of described rotor core and form a plurality of semicircular recesses in the mode of five equilibrium configuration and to constitute the steel plate of star stacked at peripheral part,
The section configuration of interior all sides of the plastic magnet of described each utmost point has formed semicircular a plurality of protuberances that central portion is swelled,
The plastic magnet of described each utmost point forms as one ringwise,
Described plastic magnet and described rotor core are integrally formed.
2. the rotor of brushless DC motor as claimed in claim 1 is characterized in that, described rotor core is a cydariform, axially has a curvilinear recess at its peripheral part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004111533 | 2004-04-05 | ||
| JP2004-111533 | 2004-04-05 | ||
| JP2004111533A JP2005295775A (en) | 2004-04-05 | 2004-04-05 | Rotor of motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1681185A CN1681185A (en) | 2005-10-12 |
| CN1681185B true CN1681185B (en) | 2010-05-12 |
Family
ID=35067653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100629866A Expired - Fee Related CN1681185B (en) | 2004-04-05 | 2005-04-04 | Brushless DC motor rotor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2005295775A (en) |
| KR (1) | KR100679804B1 (en) |
| CN (1) | CN1681185B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7417347B2 (en) * | 2005-04-11 | 2008-08-26 | Lg Electronics Inc. | Skeleton type BLDC motor |
| JP2007135346A (en) * | 2005-11-11 | 2007-05-31 | Daido Electronics Co Ltd | Yoke-integrated magnet |
| JP5696606B2 (en) * | 2011-07-04 | 2015-04-08 | 株式会社デンソー | Brushless motor and fuel pump equipped with the same |
| CN103337923A (en) * | 2013-05-18 | 2013-10-02 | 张家港倍恩特磁塑科技有限公司 | Injection moulding permanent magnet rotor of electric tool direct-current high-speed motor |
| JP6308177B2 (en) | 2015-06-26 | 2018-04-11 | 株式会社デンソー | Rotor |
| JP2017143663A (en) * | 2016-02-10 | 2017-08-17 | シンフォニアテクノロジー株式会社 | Embedded magnet type rotary machine |
| CN109861422A (en) * | 2018-12-04 | 2019-06-07 | 上海大学 | A kind of novel rotor applied to high-speed permanent magnet motor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0579560A1 (en) * | 1992-07-16 | 1994-01-19 | CROUZET Automatismes | Stepping motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49125209U (en) * | 1973-02-21 | 1974-10-26 | ||
| JPH0576147A (en) * | 1991-09-10 | 1993-03-26 | Fuji Elelctrochem Co Ltd | Rotor for motor |
| GB9611263D0 (en) * | 1995-07-14 | 1996-07-31 | Coin Controls | Inductor |
| JP2002262483A (en) * | 2001-02-27 | 2002-09-13 | Denso Corp | Direct current electronic motor |
| JP2003347142A (en) * | 2002-05-27 | 2003-12-05 | Mitsubishi Electric Corp | Method of manufacturing cylindrical anisotropic magnet and cylindrical anisotropic magnet |
-
2004
- 2004-04-05 JP JP2004111533A patent/JP2005295775A/en active Pending
-
2005
- 2005-03-31 KR KR1020050027079A patent/KR100679804B1/en not_active IP Right Cessation
- 2005-04-04 CN CN2005100629866A patent/CN1681185B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0579560A1 (en) * | 1992-07-16 | 1994-01-19 | CROUZET Automatismes | Stepping motor |
Non-Patent Citations (5)
| Title |
|---|
| JP昭58-170347A 1983.10.06 |
| JP特开2002-101620A 2002.04.05 |
| JP特开2003-299279A 2003.10.17 |
| JP特开平10-234148A 1998.09.02 |
| JP特开平5-175039A 1993.07.13 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100679804B1 (en) | 2007-02-06 |
| JP2005295775A (en) | 2005-10-20 |
| KR20060045356A (en) | 2006-05-17 |
| CN1681185A (en) | 2005-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NIDEC SHIBAURA (ZHEJIANG) CO., LTD. Free format text: FORMER OWNER: NIPPON ELECTRONICS SHIBAURA CO., LTD. Effective date: 20110915 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; TO: 314200 JIAXING, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110915 Address after: 314200, Pinghu, Pinghu Economic Development Zone, Zhejiang, Xingping Province on the east side of the two road, North Ring Road, north two, on the north side of Jiaxing Patentee after: Nidec Shibaura (Zhejiang) Co., Ltd. Address before: Fukui Prefecture of Japan Patentee before: Nippon Electronics Shibaura Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20200404 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |