DE10216476A1 - Rotor for electrical machine, especially motor, has pressed iron powder rotor body in one piece enclosing permanent magnets with good magnetic conductivity, preferably in 3 main directions - Google Patents
Rotor for electrical machine, especially motor, has pressed iron powder rotor body in one piece enclosing permanent magnets with good magnetic conductivity, preferably in 3 main directionsInfo
- Publication number
- DE10216476A1 DE10216476A1 DE2002116476 DE10216476A DE10216476A1 DE 10216476 A1 DE10216476 A1 DE 10216476A1 DE 2002116476 DE2002116476 DE 2002116476 DE 10216476 A DE10216476 A DE 10216476A DE 10216476 A1 DE10216476 A1 DE 10216476A1
- Authority
- DE
- Germany
- Prior art keywords
- rotor
- permanent magnets
- iron powder
- rotor body
- molded part
- 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- Withdrawn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
- H02K1/27—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
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Die Erfindung geht aus von einem Rotor für eine elektrische Maschine, insbesondere für einen elektrischen Motor, nach dem Oberbegriff des Anspruchs 1. The invention is based on a rotor for an electrical Machine, especially for an electric motor, according to the Preamble of claim 1.
Ein bekannter Rotor mit Permanentmagnetpolen dieser Art (EP 0 909 003 A2) weist einen Rotorkörper auf, der zur Verringerung der Wirbelstromverluste aus einer Vielzahl von dünnen kreisrunden, scheibenförmigen Lamellen oder Blechen zusammengesetzt ist. In den Rotorkörper sind in Achsrichtung sich erstreckende Schlitze, die an den Stirnseiten des Rotorkörpers offen sind, eingearbeitet. Die Schlitze sind in Umfangsrichtung äquidistant nebeneinander angeordnet. In jeden Schlitz ist ein flacher, rechteckiger Permanentmagnet eingeschoben. In die Schlitzwände sind axial sich erstreckende Nuten eingearbeitet, die mit einer Klebemasse gefüllt sind. Die Klebemasse stellt eine Klebeverbindung zu dem Permanentmagnet her, so daß jeder Permanentmagnet gegen axiale Verschiebung in den Schlitzen gesichert ist. A known rotor with permanent magnet poles of this type (EP 0 909 003 A2) has a rotor body which is used for Reduction of eddy current losses from a variety of thin circular, disc-shaped lamellae or sheets is composed. In the rotor body are in the axial direction extending slots on the front of the Rotor body are open, incorporated. The slots are in Equidistantly arranged circumferentially next to each other. In each slot is a flat, rectangular permanent magnet inserted. In the diaphragm walls are axially extending grooves incorporated with an adhesive are filled. The adhesive provides an adhesive connection the permanent magnet forth, so that each permanent magnet against axial displacement is secured in the slots.
Vorteile der ErfindungAdvantages of the invention
Der erfindungsgemäße Rotor hat den Vorteil einer wesentlich vereinfachten Herstellung und damit einer Kostenersparnis bei der Fertigung und Montage. Im Gegensatz zu den bekannten, als Blechpaket aufgebauten Rotorkörper ist keine nachträgliche Montage der Permanentmagnete in toleranzbehaftete Schlitze notwendig und auch das Verkleben der Permanentmagnete in den Schlitzen entfällt. Trotz des massiven Rotorkörpers wird durch dessen gute magnetische Leitfähigkeit in den drei Hauptrichtungen bei noch akzeptierbaren Wirbelstromverlusten eine hohe Kraftdichte und damit eine große Drehmomentausbeute in der elektrischen Maschine erzielt. The rotor according to the invention has the major advantage Simplified production and thus a cost saving manufacturing and assembly. In contrast to the known as Laminated core assembled rotor body is not a subsequent one Installation of the permanent magnets in tolerant slots necessary and also the gluing of the permanent magnets in the There is no slitting. Despite the massive rotor body due to its good magnetic conductivity in the three Main directions with still acceptable eddy current losses a high power density and thus a high torque yield achieved in the electrical machine.
Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Anspruch 1 angegebenen Rotors möglich. Die zur Herstellung des Rotors erforderlichen einzelnen Verfahrensschritte sind in Anspruch 3 angegeben. By the measures listed in the other claims are advantageous further developments and improvements of the Claim 1 specified rotor possible. The one for manufacturing of the rotor are required individual process steps specified in claim 3.
Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung erläutert. Es zeigen: The invention is based on one shown in the drawing Embodiment in the description below explained. Show it:
Fig. 1 eine perspektivische Darstellung eines Rotorkörpers für eine elektrische Maschine, Fig. 1 is a perspective view of a rotor body for an electric machine,
Fig. 2-5 jeweils ein Fertigungsstadium bei der Fertigung des Rotors in Fig. 1. Fig. 2-5, respectively, a manufacturing stage in the manufacture of the rotor in FIG. 1.
Der in Fig. 1 perspektivisch dargestellte Rotor für eine elektrische Maschine, der vorzugsweise für einen elektrischen Antriebsmotor in der Kraftfahrzeugtechnik verwendet wird, weist einen Rotorkörper 11 und eine Rotorwelle 12 auf, auf die der Rotorkörper 11 drehfest, z. B. durch Preßsitz, aufgesetzt ist. Die Rotorwelle 12 ist in bekannter Weise in einem den Stator der elektrischen Maschine aufnehmenden Maschinengehäuse gelagert. Der Rotorkörper 11 besitzt eine geradzahlige Anzahl von um eine konstante Polteilung zueinander in Umfangsrichtung versetzten Magnetpolen, im Ausführungsbeispiel der Fig. 1 insgesamt vier, die als Permanentmagnete 13 ausgebildet und im Rotorkörper 11 integriert sind. Die Permanentmagnete 13 haben die Form von schalenförmigen Segmenten und der Rotorkörper 11 ist ein die Permanentmagnete 13 jeweils allseits umschließendes, einstückiges Eisenpulverpreßteil 10 mit in drei Hauptrichtungen, also in Axial-, Radial- und in Umfangsrichtung, guter magnetischer Leitfähigkeit. The rotor shown in perspective in Fig. 1 for an electrical machine, which is preferably used for an electric drive motor in motor vehicle technology, has a rotor body 11 and a rotor shaft 12 on which the rotor body 11 is rotatably, for. B. by press fit. The rotor shaft 12 is mounted in a known manner in a machine housing receiving the stator of the electrical machine. The rotor body 11 has an even number of magnetic poles offset from one another in the circumferential direction by a constant pole pitch, in the exemplary embodiment of FIG. 1 a total of four, which are designed as permanent magnets 13 and are integrated in the rotor body 11 . The permanent magnets 13 have the shape of shell-shaped segments and the rotor body 11 is a one-piece iron powder pressed part 10 which surrounds the permanent magnets 13 on all sides and has good magnetic conductivity in three main directions, that is to say in the axial, radial and circumferential directions.
Vorzugsweise besteht das Eisenpulverpreßteil aus einem sog. SMC (Soft Magnetic Composite)-Material mit einer möglichst großen relativen Permeabilität. Preferably, the iron powder press part consists of a so-called. SMC (Soft Magnetic Composite) material with a possible large relative permeability.
Der in Fig. 1 dargestellte Rotorkörper 11 wird nach einem Verfahren hergestellt, dessen Verfahrensstadien in Fig. 2-5 schrittweise illustriert sind. The rotor body 11 shown in FIG. 1 is manufactured by a method, the stages of which are illustrated step by step in FIGS. 2-5.
Eine in Fig. 2 perspektivisch dargestellte Preßform 14 weist ein vollzylindrisches Innenformteil 141 und ein hohlzylindrisches Außenformteil 142 auf, daß das Innenformteil 141 konzentrisch mit vorgegebenem Radialabstand umschließt. In den Zwischenraum 143 zwischen Innenformteil 141 und Außenformteil 142 werden die vier Permanentmagnete 13 positionsrichtig in der in Fig. 3 dargestellten Anordnung eingesetzt und in dem Zwischenraum so ausgerichtet, daß jeder Permanentmagnet 13 von einem Freiraum umgeben ist, d. h. sowohl lichten Abstand zu dem Innenformteil, als auch lichten Abstand zu dem Außenformteil 142, sowie Abstand zu den beiden in Umfangsrichtung benachbarten Permanentmagneten 13 hat (Fig. 4). Nunmehr wird das in Pulverform vorliegende SMC- Material in den Zwischenraum 143 eingefüllt, wobei alle Freiräume zwischen den Permanentmagneten 13 und der Preßform 14 vollständig ausgefüllt werden (Fig. 5). Anschließend wird die Eisenpulverfüllung 15 gepreßt und danach die Preßform 14, also Innenformteil 141 und Außenformteil 142, vom Preßling entfernt. Ist als Eisenpulverfüllung SMC-Material verwendet worden, so wird der Preßling noch thermisch nachbehandelt. Der so entstandene Rotorkörper 11 wird mit der Rotorwelle 12 zu dem in Fig. 1 dargestellten Rotor vervollständigt. A press mold 14 shown in perspective in FIG. 2 has a fully cylindrical inner molded part 141 and a hollow cylindrical outer molded part 142 that concentrically encloses the inner molded part 141 with a predetermined radial distance. In the space 143 between the inner molded part 141 and the outer molded part 142 , the four permanent magnets 13 are inserted in the correct position in the arrangement shown in FIG. 3 and aligned in the space such that each permanent magnet 13 is surrounded by a free space, that is to say both a clear distance from the inner molded part, as well as clear distance to the outer molded part 142 , as well as distance to the two adjacent permanent magnets 13 in the circumferential direction ( FIG. 4). Now the SMC material, which is in powder form, is filled into the intermediate space 143 , all the spaces between the permanent magnets 13 and the compression mold 14 being completely filled ( FIG. 5). Then the iron powder filling 15 is pressed and then the mold 14 , that is the inner molded part 141 and the outer molded part 142 , is removed from the compact. If SMC material has been used as the iron powder filling, the compact is then thermally aftertreated. The resulting rotor body 11 is completed with the rotor shaft 12 to form the rotor shown in FIG. 1.
Claims (5)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002116476 DE10216476A1 (en) | 2002-04-13 | 2002-04-13 | Rotor for electrical machine, especially motor, has pressed iron powder rotor body in one piece enclosing permanent magnets with good magnetic conductivity, preferably in 3 main directions |
PCT/DE2003/000767 WO2003088450A1 (en) | 2002-04-13 | 2003-03-11 | Rotor for an electric machine |
AU2003240382A AU2003240382A1 (en) | 2002-04-13 | 2003-03-11 | Rotor for an electric machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002116476 DE10216476A1 (en) | 2002-04-13 | 2002-04-13 | Rotor for electrical machine, especially motor, has pressed iron powder rotor body in one piece enclosing permanent magnets with good magnetic conductivity, preferably in 3 main directions |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10216476A1 true DE10216476A1 (en) | 2003-10-23 |
Family
ID=28458806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2002116476 Withdrawn DE10216476A1 (en) | 2002-04-13 | 2002-04-13 | Rotor for electrical machine, especially motor, has pressed iron powder rotor body in one piece enclosing permanent magnets with good magnetic conductivity, preferably in 3 main directions |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2003240382A1 (en) |
DE (1) | DE10216476A1 (en) |
WO (1) | WO2003088450A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006067274A1 (en) * | 2004-12-23 | 2006-06-29 | Abb Oy | Rotor structure for a permanent-magnet machine |
WO2007017310A1 (en) * | 2005-08-08 | 2007-02-15 | Robert Bosch Gmbh | Measuring device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005049541A1 (en) * | 2005-10-17 | 2007-04-19 | Robert Bosch Gmbh | Rotor for an electric machine |
CN101931273B (en) * | 2010-08-31 | 2012-01-18 | 吕元之 | Annular magnetic hub for powder metallurgy and preparation method thereof |
DE102013218829A1 (en) | 2013-09-19 | 2015-03-19 | Siemens Aktiengesellschaft | Rotor for an electric machine, method for manufacturing a rotor and electric machine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1246925B (en) * | 1991-04-04 | 1994-11-29 | Ricerca Elettromeccanica Srl | METHOD FOR THE PRODUCTION OF PARTS OF ELECTRIC MOTORS AND MOTORS USING PARTS PRODUCED WITH THAT METHOD |
FR2730874B1 (en) * | 1995-02-16 | 1997-03-21 | Ugimag Sa | COMPOSITE INDUCTOR FOR ROTATING ELECTRIC MACHINES COMPRISING SINTERED PERMANENT MAGNETS COATED IN A FERROMAGNETIC BINDER |
US5811904A (en) * | 1996-03-21 | 1998-09-22 | Hitachi, Ltd. | Permanent magnet dynamo electric machine |
JP2000324737A (en) * | 1999-05-06 | 2000-11-24 | Nissan Motor Co Ltd | Manufacture of rotor of synchronous motor |
-
2002
- 2002-04-13 DE DE2002116476 patent/DE10216476A1/en not_active Withdrawn
-
2003
- 2003-03-11 AU AU2003240382A patent/AU2003240382A1/en not_active Abandoned
- 2003-03-11 WO PCT/DE2003/000767 patent/WO2003088450A1/en not_active Application Discontinuation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006067274A1 (en) * | 2004-12-23 | 2006-06-29 | Abb Oy | Rotor structure for a permanent-magnet machine |
US8084910B2 (en) | 2004-12-23 | 2011-12-27 | Abb Oy | Rotor structure for a permanent-magnet machine |
WO2007017310A1 (en) * | 2005-08-08 | 2007-02-15 | Robert Bosch Gmbh | Measuring device |
US7894043B2 (en) | 2005-08-08 | 2011-02-22 | Robert Bosch Gmbh | Hand-held distance measuring device with static unit and drive element |
Also Published As
Publication number | Publication date |
---|---|
AU2003240382A1 (en) | 2003-10-27 |
WO2003088450A1 (en) | 2003-10-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |