EP2082470A2 - Module magnétique pour une machine électrique à excitation par aimants permanents - Google Patents

Module magnétique pour une machine électrique à excitation par aimants permanents

Info

Publication number
EP2082470A2
EP2082470A2 EP07821208A EP07821208A EP2082470A2 EP 2082470 A2 EP2082470 A2 EP 2082470A2 EP 07821208 A EP07821208 A EP 07821208A EP 07821208 A EP07821208 A EP 07821208A EP 2082470 A2 EP2082470 A2 EP 2082470A2
Authority
EP
European Patent Office
Prior art keywords
rotor
permanent magnet
magnetic
electric machine
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.)
Withdrawn
Application number
EP07821208A
Other languages
German (de)
English (en)
Inventor
Torsten Metzner
Joachim Risse
Hartmut Walter
Ralf Wilcke
Reinhard Zech
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2082470A2 publication Critical patent/EP2082470A2/fr
Withdrawn legal-status Critical Current

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
    • H02K1/278—Surface mounted magnets; Inset magnets

Definitions

  • Magnet module for a permanent magnet excited electric machine
  • the present invention relates to a magnetic module for a permanent-magnet-excited electric machine which has a carrier and at least one permanent magnet.
  • the magnets are usually mounted on the rotor. In linear electric machines, they are usually attached to the secondary part, but partially also to the primary part.
  • the permanent magnets must be protected from environmental influences. Protection against environmental influences is indispensable, especially in so-called off-shore applications.
  • a special requirement is the attachment of the permanent magnets to the respective motor part. It must meet the electrical and mechanical boundary conditions of the respective electrical machine. These are generally magnetic forces, centrifugal forces and mounting options. In addition to easy installation, the magnet system also has to be easy to manufacture, easy to magnetize and, moreover, easy to replace.
  • bandages are used for centrifugal force protection.
  • potting compounds and bandages are used as additional protection against environmental influences.
  • EP 1 439 626 A1 describes an arrangement of permanent magnets for a synchronous machine. There permanent magnets are fixed surface and at least on one side on a substrate. In addition, parallelepipedic permanent magnets embedded in a potting are sandwiched between two different substrates. One of the two Carrier materials is non-magnetic and the other carrier material made of soft magnetic material.
  • the object of the present invention is the assembly, in particular a large electric machine, for. B. a wind power generator, as simple as possible and therefore to propose appropriate machine components.
  • a magnetic module for a permanent magnet electric machine with a support plate for attachment to the rotor or the stator of the electric machine, at least one permanent magnet, which is arranged on the support plate, and a cover, with which the at least one permanent magnet the support plate is fixed so that it is located between the support plate and the cover.
  • Another advantage of the magnetic module according to the invention is that the respective magnetic modules, i. the individual systems for which electrical machine can be easily magnetized. The magnetization does not have to be carried out on the rotor or stator.
  • all outwardly directed surfaces of the at least one permanent magnet are covered by the cover device, which are not covered by the carrier plate are.
  • the cover device which are not covered by the carrier plate are.
  • the cover may consist of a steel cap.
  • a steel cap has the desired mechanical, electrical and magnetic properties.
  • the at least one permanent magnet is fixed on the carrier plate and / or on the cover device by a resin or an adhesive.
  • a resin or an adhesive it is also advantageous if the at least one permanent magnet is fixed on the carrier plate and / or on the cover device by a resin or an adhesive.
  • system can be filled with a filler to protect the system against / against vibration.
  • the carrier plate can also have a coating against environmental influences.
  • a coating can be optimized especially with regard to a specific environmental factor.
  • the rotor of an electric machine is equipped with numerous, mounted on its outer periphery magnetic modules, as described above.
  • the covering device can be designed and fastened to the carrier plate in such a way that it can receive the substantial part of the centrifugal forces of the at least one permanent magnet at a predetermined rotational speed of the electric machine.
  • bandages can be applied only relatively difficult to the large rotors corresponding electric machines.
  • magnetic modules may be arranged asymmetrically on the rotor in the circumferential direction. This has the advantage that as a result the cogging torques are reduced.
  • FIG. 2 shows a plan view of the magnetic module of FIG. 1;
  • FIG. 4 shows a cross section through the cap of FIG. 3
  • FIG. 6 shows a detail of FIG 5
  • FIG. 7 shows a cross section through the magnetic module of FIG. 6 and FIG
  • FIG. 8 shows an axial longitudinal section through the magnetic module of FIG. 6
  • the magnetic module 1 shown by way of example in FIG. 1 consists of a cap 2, which corresponds to a cuboid container with 5 walls.
  • a cap 2 which corresponds to a cuboid container with 5 walls.
  • one or more permanent magnets 3 are inserted into the cap 2.
  • a support plate 4 is applied and firmly connected to the cap 2.
  • corresponding connecting elements 5 are provided on the carrier plate 4 and on the cap 2.
  • FIG. 2 is a plan view of the magnetic module according to the invention is shown, wherein the support plate 4 is not applied there.
  • the cap 2 In the cap 2 are here two permanent magnets 3, 3 'inserted.
  • Those points at which connecting elements 5 are provided for connection to a carrier plate are indicated by an arrow as in FIG.
  • FIG. 3 shows a view like that of FIG. 2, but with the magnets removed.
  • An adhesive or filler 6 is applied at the points which approximately correspond to the middle regions of the magnets 3, 3 'still to be used.
  • the filler 6 can according to FIG 4, if it is not registered over the entire surface in the cap 2, are also applied in the edges and side walls of the cap 2, so that a fixation of the permanent magnets 3 in 1 relative horizontal direction takes place.
  • the filler 6 is therefore also in the Figures 1 and 2 each between the cap 2 and the edge sides of the permanent magnets 3, 3 'can be seen.
  • the support plate 4 for attachment, for example, to a rotor of an electrical machine is made of an electrically suitable material and can be protected with a coating against environmental influences.
  • a material for example, as well as for the hood or cap 2 steel.
  • the cap 2 is connected to the support plate 4, it serves as centrifugal force, environmental influence or splinter protection for the permanent magnets 3, 3 '.
  • the hood 2 and the connecting elements 5 are made of a suitable material, such as metal or plastic.
  • adhesive or filler 6 resin or another adhesive can be used.
  • FIG 5 a rotor 7 and a stator 8 of a permanent magnet excited machine is shown in cross section.
  • a machine is used for example as a generator in a wind turbine. Your rotor typically has a diameter of 5 meters.
  • FIG. 6 a section A of FIG. 5 is shown enlarged.
  • a magnetic module 1 is screwed into a corresponding recess of the rotor 7.
  • the support plate 4 is screwed to the rotor 7 here.
  • FIG. 7 which, like FIG. 1, shows the magnetic module in cross-section, a thread 9.
  • the magnetic module is shown standing upside down in relation to the representation of FIG. This orientation of the magnetic module 1 also corresponds to that of FIG. 6.
  • the magnetic module of FIG. 7 is shown in longitudinal section, i. shown in the axial direction of the machine.
  • the equipped with two threads 9 carrier plate 4 carries here the two permanent magnets 3, 3 '. These two permanent magnets 3, 3 'are spaced apart by a gap 10.
  • the gap 10 can be filled to better fix the permanent magnets 3, 3 'against each other with the filler.
  • the magnetic module shown in FIG 8 has for the aforementioned application in a wind turbine, for example, an axial length of 25 cm. Accordingly, a corresponding number of magnetic modules are to be inserted into the rotor-stator gap in the axial direction.
  • a graphically not shown variant of a rotor may consist in that the magnetic modules are arranged asymmetrically in the circumferential direction on the rotor. This means that the distances of the magnetic modules are not equidistant when looking axially at the pole wheel. For example, every nth system (where the number of poles n must be integer divisible) is equidistant and the magnetic modules or magnet systems in between are shifted by a certain angle. This asymmetry reduces the cogging torque of the electric machine.
  • the support plate 4 is approximately as thick as the permanent magnets 3, 3 '. In principle, however, the ratio of the carrier plate thickness to the magnet thickness can be chosen arbitrarily.
  • resulting from the support plate 4 and the cap 2 for the magnetic module a pure sleeve.
  • the magnetic module according to the invention or a rotor equipped therewith has numerous advantages.
  • a main advantage is that an assembly of the magnetic modules or magnet systems can take place in the assembled state of the electrical machine. This means that, for example, the rotor is retracted into the stator and only then the permanent magnets or the magnetic modules plugged into the gap between the rotor and stator, inserted and / or screwed.
  • the non-magnetic rotor can first be stored in the stator, without the risk that both attach hardly separable to each other. So it is in the assembly of rotor and stator no special transport system or no special device tube provided to introduce the rotor in the stator.
  • the entire magnetization process of the magnet system can be simplified. This is because the individual systems, i. the individual magnetic modules can be magnetized without much mechanical effort. On the other hand, the engine with the mounted on it would have to
  • Magnet modules are subsequently magnetized, so this would require a special magnetization arrangement.
  • Another advantage of the magnetic modules is that the rotors can be equipped very flexibly with the magnetic modules. In addition to the asymmetrical arrangement, it is also possible to create any pole gaps into which appropriate cooling systems can be introduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne une machine électrique à excitation par aimants permanents, notamment un générateur de grande taille d'une installation éolienne, qui doit pouvoir être fabriquée et montée de manière simple. A cet effet, selon l'invention, on met à disposition des modules magnétiques (1) dont on peut équiper par exemple un rotor. Chaque module magnétique (1) possède une plaque de support (4) pour la fixation sur le rotor, au moins un aimant permanent (3) qui est disposé sur la plaque de support (4), et un dispositif de recouvrement (2) avec lequel l'aimant permanent au moins unique (3) est fixé sur la plaque de support (4) de sorte qu'il se trouve entre la plaque de support (4) et le dispositif de recouvrement (2). D'une manière avantageuse, de tels modules magnétiques (1) peuvent être montés ou remplacés d'une manière simple dans l'interstice entre le rotor et le stator.
EP07821208A 2006-10-17 2007-10-11 Module magnétique pour une machine électrique à excitation par aimants permanents Withdrawn EP2082470A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006048966A DE102006048966A1 (de) 2006-10-17 2006-10-17 Magnetmodul für eine permanentmagneterregte elektrische Maschine
PCT/EP2007/060841 WO2008046780A2 (fr) 2006-10-17 2007-10-11 Module magnétique pour une machine électrique à excitation par aimants permanents

Publications (1)

Publication Number Publication Date
EP2082470A2 true EP2082470A2 (fr) 2009-07-29

Family

ID=38924469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07821208A Withdrawn EP2082470A2 (fr) 2006-10-17 2007-10-11 Module magnétique pour une machine électrique à excitation par aimants permanents

Country Status (4)

Country Link
US (1) US20100194226A1 (fr)
EP (1) EP2082470A2 (fr)
DE (1) DE102006048966A1 (fr)
WO (1) WO2008046780A2 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK2063117T3 (en) * 2007-11-26 2016-12-19 Siemens Ag A device for a direct drive generator, a direct drive generator, turbine and the method for mounting a generator
CN102204070B (zh) * 2008-07-22 2013-09-18 阿利发风有限公司 永久励磁的同步电机
DE102009031371B4 (de) * 2009-07-01 2011-05-26 Siemens Aktiengesellschaft Läufer und Verfahren zur Herstellung eines Läufers einer elektrischen Maschine
US9515529B2 (en) 2009-08-18 2016-12-06 Northern Power Systems, Inc. Method and apparatus for permanent magnet attachment in an electromechanical machine
DE102009054191B4 (de) 2009-11-20 2020-09-17 Jenoptik Advanced Systems Gmbh Vorrichtung und Verfahren zur Befestigung von Magneten auf einen Rotor
EP2498378B1 (fr) 2010-01-11 2014-01-08 GE Energy Power Conversion Technology Limited Agencement d'aimant permanent pour machine électrique
US8063531B2 (en) 2010-01-11 2011-11-22 Converteam Technology Ltd. Permanent magnet arrangement for an electrical machine
WO2012034713A2 (fr) * 2010-09-15 2012-03-22 Siemens Aktiengesellschaft Pièce polaire destinée à une machine électrique et procédé d'assemblage d'une pièce polaire
EP2523316B8 (fr) 2011-05-11 2014-11-19 ALSTOM Renewable Technologies Rotor de générateur, procédé d'assemblage et dispositif d'insertion correspondant
EP2639934B1 (fr) * 2012-03-16 2015-04-29 Siemens Aktiengesellschaft Rotor à excitation permanente, machine électrique dotée d'un tel rotor et procédé de fabrication du rotor
EP2645534B1 (fr) * 2012-03-26 2018-01-31 Siemens Aktiengesellschaft Composant d'aimant avec une structure d'isolation thermique, ensemble rotor pourvu d'un tel composant d'aimant, transducteur électromécanique et éolienne
WO2014151496A1 (fr) * 2013-03-15 2014-09-25 Northern Power Systems, Inc. Procédé et appareil pour installer des aimants permanents dans une machine électromécanique
EP2930825A1 (fr) * 2014-04-11 2015-10-14 Siemens Aktiengesellschaft Montage d'aimants permanents sur un rotor d'une machine électrique
CN104467225B (zh) * 2014-11-19 2017-09-12 新疆金风科技股份有限公司 转子的磁极模块及其装配方法和转子
JP2019030063A (ja) 2017-07-26 2019-02-21 Tdk株式会社 磁石構造体及びモータ
DK3575630T3 (da) * 2018-05-29 2021-07-19 Woelfel Eng Gmbh Co Kg Svingningsdæmpningsanordning
DE102021201602A1 (de) 2021-02-19 2022-08-25 Zf Friedrichshafen Ag Rotor für eine elektrische Maschine sowie elektrische Maschine mit einem Rotor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269216A1 (fr) 1986-10-30 1988-06-01 General Motors Corporation Assemblage d'un aimant permanent
EP0751605A2 (fr) 1995-06-30 1997-01-02 Kaman Electromagnetics Corporation Support amovible d'aimant pour moteur à aimant permanent
EP1359661A2 (fr) 2002-04-30 2003-11-05 Honda Giken Kogyo Kabushiki Kaisha Moteur sans balai et dispositif pour direction assistée électrique équipé d'un tel moteur
WO2006067274A1 (fr) 2004-12-23 2006-06-29 Abb Oy Structure de rotor destinee a une machine a aimant permanent

Family Cites Families (12)

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US4625135A (en) * 1983-07-19 1986-11-25 The Garrett Corporation Permanent magnet rotor
US4642502A (en) * 1986-04-24 1987-02-10 General Motors Corporation Dynamoelectric machine with permanent magnet and magnet mounting surface arrangement
DE4133723A1 (de) * 1991-10-11 1993-04-15 Zahnradfabrik Friedrichshafen Drehfeldmotor
DE19503511C5 (de) * 1995-02-03 2010-11-04 Siemens Ag Synchron-Linearmotor
DE69814356T2 (de) * 1998-05-22 2004-03-25 Northmag B.V. Bürstenloser permanenterregter Elektromotor
DE19853250B4 (de) * 1998-11-18 2012-02-02 Siemens Ag Sekundärteil für einen Linearmotor
JP2001119878A (ja) * 1999-10-20 2001-04-27 Mitsubishi Electric Corp 回転電機の回転子
JP3755437B2 (ja) * 2001-07-23 2006-03-15 株式会社明電舎 永久磁石式回転電機
DE10301079A1 (de) * 2003-01-14 2004-07-29 Siemens Ag Flächige Anordnung von Permanentmagneten
US6933645B1 (en) * 2004-04-05 2005-08-23 Elliott Company Permanent magnet rotor and magnet cradle
US7573168B2 (en) * 2005-10-24 2009-08-11 General Electric Company Method and apparatus for assembling a permanent magnet pole assembly
GB2438443A (en) * 2006-05-27 2007-11-28 Converteam Ltd Rotor magnet retaining arrangement suitable for low-speed large-diameter electrical generators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269216A1 (fr) 1986-10-30 1988-06-01 General Motors Corporation Assemblage d'un aimant permanent
EP0751605A2 (fr) 1995-06-30 1997-01-02 Kaman Electromagnetics Corporation Support amovible d'aimant pour moteur à aimant permanent
EP1359661A2 (fr) 2002-04-30 2003-11-05 Honda Giken Kogyo Kabushiki Kaisha Moteur sans balai et dispositif pour direction assistée électrique équipé d'un tel moteur
WO2006067274A1 (fr) 2004-12-23 2006-06-29 Abb Oy Structure de rotor destinee a une machine a aimant permanent

Also Published As

Publication number Publication date
US20100194226A1 (en) 2010-08-05
WO2008046780A3 (fr) 2008-08-21
WO2008046780A2 (fr) 2008-04-24
DE102006048966A1 (de) 2008-04-30

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