EP2923432A1 - Rotor eines elektromotors und verfahren zur herstellung des rotors - Google Patents
Rotor eines elektromotors und verfahren zur herstellung des rotorsInfo
- Publication number
- EP2923432A1 EP2923432A1 EP13792013.8A EP13792013A EP2923432A1 EP 2923432 A1 EP2923432 A1 EP 2923432A1 EP 13792013 A EP13792013 A EP 13792013A EP 2923432 A1 EP2923432 A1 EP 2923432A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnets
- plastic
- rotor
- shaft
- webs
- 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.)
- Withdrawn
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
- H02K1/28—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
- 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
- H02K1/278—Surface mounted magnets; Inset magnets
-
- 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
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
-
- 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
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
Definitions
- the invention relates to a rotor of an electric motor with an anchor plate package, a shaft, magnets arranged on the circumference of the armature ⁇ sheet package and a Kunststoffumsprit- tion.
- the invention further relates to a method for producing the rotor.
- Such rotors of electric motors are used for example in fuel pumps or actuators and are therefore state of the art.
- the magnetic flux must be as high as possible.
- the magnets are fixed in their position by the plastic extrusion.
- the laminated core with the shaft and the magnets is placed in an injection mold. This means that the magnets must be brought into the correct final position before the injection molding in the injection mold.
- adhesive For this it is known to fix the magnets on the rotor with adhesive. This fixing by means of adhesive means an additional step, which adversely affects the productivity of ⁇ .
- the first object is achieved with a rotor in which the armature lamination packet has at least one associated channel at its circumference to each magnet, wherein the channels run parallel to the shaft and that the armature lamination packet extends radially on the circumference.
- directed webs has, wherein the webs extend parallel to the shaft and between two webs is arranged in each case a magnet, and that the plastic encapsulation covers the laminated core and the magnets so far that only the radial outer side of the magnet is free of plastic.
- the arrangement of the channels and the webs has the consequence that thereby the magnets can be positioned defined both in the radial direction and in your distribution at the periphery. With the webs, the distribution of the magnets on the circumference can be specified exactly.
- the open to the magnets channels cause the injected plastic through these openings due to its injection pressure against the magnets and these against the
- Injection mold presses Injection mold presses. In this way, the magnets are moved in the radial direction in their final position. This has the advantage that the end position of the magnets is determined solely by the injection mold. Manufacturing tolerances of the anchor plate package and positional tolerances in the injection mold are compensated. As a result, the anchor plate package can be manufactured with larger tolerances and thus more cost-effectively. In addition, a fixing of the magnets can be omitted.
- According to further advantageous embodiments may have a round, triangular or polygonal cross-sectional area ⁇ the channels.
- a particularly intimate connection of the plastic encapsulation with the anchor lamination stack is achieved when the cross-sectional area of the channels creates an undercut with respect to the opening located toward the magnets.
- a form fit between the anchor plate package and the plastic extrusion is additionally generated.
- the holding of the magnets on the rotor is achieved by the adhesive bond between plastic and magnet.
- the holding of the magnets on the rotor can be increased according to an advantageous embodiment, when the magnets are additionally connected with a positive connection with the plastic extrusion by at least the radially outer edges of the magnets have chamfers and the chamfers are surrounded by plastic.
- a reliable distribution of the magnets on the periphery without substantially increasing the weight of the armature plate package is achieved in another embodiment in that the webs have a lower height than the magnets. In this way, the distribution is ensured without significantly increasing the diameter of the anchor plate. This in turn means that the costs for these stamped parts hardly increase.
- the second object is achieved in that the plastic end face in the channels in the anchor plate package penetrates ⁇ and the magnets in the radial direction against the
- the advantage is that reaching the final position of the magnets in the rotor is no longer achieved exclusively by the formation of the rotor and / or the injection mold.
- the process-related pressure with which the plastic is injected into the injection mold is used to move the magnets into their end position, which is determined by the injection mold.
- the webs in the anchor plate package serve to guide when the magnets move radially outward. The positioning of the magnets thus takes place only during the actual injection molding and not during insertion into the injection mold. Only the interaction of Workpiece, tool and process leads to the final posi ⁇ tioning.
- Fig. 3 shows a channel of the anchor sheet package in an enlarged view.
- Figure 1 shows a rotor of an electric motor which is used in a fuel pump or an actuator, whose shaft is not shown.
- an anchor plate package 1 which consists of a plurality of punched plates 2, which are connected to the anchor plate package 1.
- Magnets 3 are arranged around the lateral surface of the laminated core 1.
- Anchor plate package 1 and magnets 3 are encapsulated with plastic 4 and together form the rotor as a homogeneous body.
- the magnets can be both hard ferrite magnets or Neo ⁇ dym magnets.
- FIG. 2a shows the laminated core 1, consisting of the
- the magnets 3 have at their radially outer edges 5 and the radially inner edges 6 of the front sides 7 of chamfers 10 having a positive bond between the magnet 3 and plastic 4 ge ⁇ schrangn during the encapsulation with the plastic.
- the plastic 4 may be polyoxymethylene or polyamide.
- the laminated core 1 has on the lateral surface radially outwardly projecting webs 8 which fix the magnets 3 in the circumferential direction on the laminated core 1. Between two Webs 8 each have a channel 9 is arranged. Both the channels 9 and the webs 8 are aligned parallel to the shaft of the rotor.
- FIG. 2b shows the laminated core 1 and the magnets 3, as arranged in the injection mold.
- Figure 3 shows a channel 9 in an enlarged view.
- the channel 9 has over its longitudinal extent a directed towards the magnet 3 opening 10.
- the width of the opening 10 is smaller than the diameter of the cross-sectional area of the channel 9.
- the plastic 4 is injected into the channel 9.
- the magnet 3 is pressed radially outward against the wall of the injection mold in its final position. This movement is significantly smaller than the height h of the webs 8.
- the magnet 3 With the cooling and curing of the plastic melt 4, the magnet 3 is fixed in its end position.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012221422.4A DE102012221422A1 (de) | 2012-11-23 | 2012-11-23 | Rotor eines Elektromotors und Verfahren zur Herstellung des Rotors |
PCT/EP2013/074024 WO2014079794A1 (de) | 2012-11-23 | 2013-11-18 | Rotor eines elektromotors und verfahren zur herstellung des rotors |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2923432A1 true EP2923432A1 (de) | 2015-09-30 |
Family
ID=49585403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13792013.8A Withdrawn EP2923432A1 (de) | 2012-11-23 | 2013-11-18 | Rotor eines elektromotors und verfahren zur herstellung des rotors |
Country Status (7)
Country | Link |
---|---|
US (1) | US10224772B2 (de) |
EP (1) | EP2923432A1 (de) |
JP (1) | JP2016502389A (de) |
KR (1) | KR102216971B1 (de) |
CN (1) | CN104798289A (de) |
DE (1) | DE102012221422A1 (de) |
WO (1) | WO2014079794A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3037734B1 (fr) * | 2015-06-16 | 2019-11-01 | Bubendorff | Rotor a toles empilees. |
JP6586633B2 (ja) * | 2015-08-26 | 2019-10-09 | パナソニックIpマネジメント株式会社 | 電動機 |
CN105082456B (zh) * | 2015-09-14 | 2018-04-10 | 广东威灵电机制造有限公司 | 用于定子注塑模具的型芯及具有其的定子注塑模具 |
DE102016201970A1 (de) * | 2016-02-10 | 2017-08-10 | Robert Bosch Gmbh | Elektrische Maschine |
JP6298086B2 (ja) | 2016-02-24 | 2018-03-20 | ファナック株式会社 | 電動機のロータ及びその製造方法 |
DE102016209174A1 (de) | 2016-05-25 | 2017-11-30 | Continental Automotive Gmbh | Rotor und Verfahren zur Herstellung eines Rotors |
DE102016219974B3 (de) * | 2016-10-13 | 2018-03-08 | BSH Hausgeräte GmbH | Elektrischer Antriebsmotor |
DE102017105089A1 (de) * | 2017-03-10 | 2018-09-13 | Kolektor Group D.O.O. | Elektromotor |
DE102017121219A1 (de) * | 2017-09-13 | 2019-03-14 | Valeo Systèmes d'Essuyage | Bürstenloser Elektromotor |
CN109600007B (zh) * | 2018-12-18 | 2021-02-26 | 张家港倍恩特磁塑科技有限公司 | 一种直流电机磁瓦防震转子模具的浇注结构 |
CN111404350B (zh) * | 2020-02-19 | 2022-05-13 | 哈尔滨工业大学 | 适用于平面电机的非等高二维削角Halbach永磁阵列 |
EP4037158A1 (de) | 2021-02-02 | 2022-08-03 | Black & Decker, Inc. | Bürstenloser motor mit verschachtelter lagerbrücke |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62247745A (ja) * | 1986-04-21 | 1987-10-28 | Matsushita Seiko Co Ltd | 無整流子電動機の回転子 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2217924A (en) * | 1939-10-09 | 1940-10-15 | Egry Register Co | Manifolding article and method of making |
JPH0284032A (ja) * | 1988-04-25 | 1990-03-26 | Matsushita Electric Works Ltd | 永久磁石回転子 |
GB2217924B (en) * | 1988-04-25 | 1992-10-07 | Matsushita Electric Works Ltd | Permanent magnet rotor |
EP0459355A1 (de) * | 1990-06-01 | 1991-12-04 | Hitachi, Ltd. | Rotor mit Dauermagneten |
JPH0438134A (ja) * | 1990-06-01 | 1992-02-07 | Hitachi Ltd | 永久磁石形回転子 |
JPH0813174B2 (ja) * | 1990-08-29 | 1996-02-07 | 松下電器産業株式会社 | 永久磁石付回転機の回転子 |
BR9504773A (pt) * | 1995-10-04 | 1997-09-02 | Brasil Compressores Sa | Rotor com imãs permanentes para motor elétrico |
US6078121A (en) * | 1997-02-21 | 2000-06-20 | Emerson Electric Co. | Rotor assembly for a rotating machine |
JP2000324769A (ja) * | 1999-05-13 | 2000-11-24 | Matsushita Electric Ind Co Ltd | ステッピングモータ |
US6712585B2 (en) * | 2001-09-19 | 2004-03-30 | Viking Pump, Inc. | Magnetic pump |
DE102005048546A1 (de) * | 2005-10-11 | 2007-04-12 | Robert Bosch Gmbh | Rotor für eine elektrische Maschine |
ES2346063T3 (es) * | 2005-11-18 | 2010-10-08 | Askoll Holding S.R.L. | Metodo para realizar un rotor de iman permanente para un motor sincrono particularmente para una bomba de lavadora para uso industrial y domestico y similar, y rotor relativo. |
JP4671997B2 (ja) * | 2007-10-23 | 2011-04-20 | 三菱電機株式会社 | 回転電機の回転子、及びその製造方法 |
JP5228582B2 (ja) * | 2008-04-04 | 2013-07-03 | 三菱電機株式会社 | 永久磁石型回転電機およびそれを用いた電動パワーステアリング装置 |
DE102008034422A1 (de) * | 2008-07-23 | 2010-02-04 | Kolektor Group D.O.O. | Rotor für einen elektronisch kommutierten Motor |
NZ582764A (en) * | 2010-01-20 | 2012-04-27 | Wellington Drive Technologies Ltd | Rotor or stator with magnets contacting flux returns |
DE102010014597A1 (de) * | 2010-04-09 | 2011-10-13 | Continental Automotive Gmbh | Rotor |
US9130426B2 (en) * | 2011-10-31 | 2015-09-08 | Regal Beloit America, Inc. | Permanent magnet rotors and methods of assembling the same |
CN105792570A (zh) | 2016-05-05 | 2016-07-20 | 吴平芳 | 一种具有供电提示的电气柜 |
-
2012
- 2012-11-23 DE DE102012221422.4A patent/DE102012221422A1/de active Pending
-
2013
- 2013-11-18 EP EP13792013.8A patent/EP2923432A1/de not_active Withdrawn
- 2013-11-18 WO PCT/EP2013/074024 patent/WO2014079794A1/de active Application Filing
- 2013-11-18 JP JP2015543400A patent/JP2016502389A/ja active Pending
- 2013-11-18 KR KR1020157014576A patent/KR102216971B1/ko active IP Right Grant
- 2013-11-18 CN CN201380060321.4A patent/CN104798289A/zh active Pending
- 2013-11-18 US US14/443,868 patent/US10224772B2/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62247745A (ja) * | 1986-04-21 | 1987-10-28 | Matsushita Seiko Co Ltd | 無整流子電動機の回転子 |
Also Published As
Publication number | Publication date |
---|---|
US10224772B2 (en) | 2019-03-05 |
DE102012221422A1 (de) | 2014-05-28 |
KR20150086484A (ko) | 2015-07-28 |
WO2014079794A1 (de) | 2014-05-30 |
CN104798289A (zh) | 2015-07-22 |
JP2016502389A (ja) | 2016-01-21 |
US20150303752A1 (en) | 2015-10-22 |
KR102216971B1 (ko) | 2021-02-18 |
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Legal Events
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AX | Request for extension of the european patent |
Extension state: BA ME |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20190718 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VITESCO TECHNOLOGIES GMBH |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20191129 |