WO2007051895A1 - Procédé et agencement dans une machine électrique excitée par des aimants permanents - Google Patents

Procédé et agencement dans une machine électrique excitée par des aimants permanents Download PDF

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Publication number
WO2007051895A1
WO2007051895A1 PCT/FI2006/000342 FI2006000342W WO2007051895A1 WO 2007051895 A1 WO2007051895 A1 WO 2007051895A1 FI 2006000342 W FI2006000342 W FI 2006000342W WO 2007051895 A1 WO2007051895 A1 WO 2007051895A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
shaft
stator
actuator
electrical machine
Prior art date
Application number
PCT/FI2006/000342
Other languages
English (en)
Inventor
Jouni Ikäheimo
Ari Tammi
Juha-Pekka Kuokkala
Original Assignee
Abb Oy
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 Abb Oy filed Critical Abb Oy
Publication of WO2007051895A1 publication Critical patent/WO2007051895A1/fr

Links

Classifications

    • 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
    • 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
    • H02K15/16—Centering rotors within the stator; Balancing rotors

Definitions

  • the object of the invention is a method according to the preamble of Claim 1 for installing a rotor that is excited by permanent magnets into an electrical machine and an arrangement according to Claim 11 in an electrical machine excited by permanent magnets.
  • the publication JP 10-066312 presents a means of assembly for a permanent magnet synchronous machine.
  • the stator is moved axially while the rotor stays still.
  • Assurance of an air gap being maintained between the stator and the rotor during installation is provided by means of guide pins or rails.
  • Disclosure of the invention is to create a method for installing a rotor excited by permanent magnets into an electrical machine, as well as an arrangement in an electrical machine excited by permanent magnets.
  • the invention is characterised by the features specified in the characteristics sections of Claims 1 and 11. Some other preferred embodiments of the invention have the characteristics specified in the dependent claims.
  • a rotor excited by permanent magnets is installed into an electrical machine by means of a support.
  • An electrical machine comprises a stator and a rotor.
  • the support contains a shaft supporting the rotor.
  • the rotor is fitted onto the end of the shaft supporting the rotor. The rotor is rotated, or the shaft supporting the rotor is rotated, whereupon the rotor is moved to its operating position with the help of mutually corresponding threads arranged on the rotor and the shaft supporting the rotor.
  • An arrangement according to the invention comprises an electrical machine excited by permanent magnets.
  • the arrangement comprises the stator of an electrical machine and the rotor of an electrical machine excited by permanent magnets, as well as a support.
  • the support contains a shaft supporting the rotor.
  • Mutually compatible threads are arranged on the rotor and, correspondingly, on the shaft supporting the rotor.
  • the rotor is movable to its operating position by rotating the rotor or by rotating the shaft supporting the rotor.
  • the stator is attached to the support in order to keep it stationary during the installation of the rotor.
  • the threads on the rotor are arranged on the rotor shaft or the inner surface of the rotor, for example.
  • the rotor comprises a sheet pack and a bushing fitted inside the sheet pack that has an inner thread.
  • the bushing protrudes from the rotor sheet pack at the end facing the actuator.
  • an installation support with a shaft supporting the rotor is used.
  • the stator is attached to the installation support and the permanent magnet rotor is fitted onto the end of the shaft on the installation support that supports the rotor.
  • the rotor is moved into its operating position by means of the threads.
  • the stator and the rotor are locked in relation to each other using a locking plate, for example, while the rotor is in its operating position.
  • the installation support is then removed.
  • the support is the body part of the actuator operated by the electrical machine.
  • the stator is aligned and attached to the body part of the actuator, and the actuator's shaft supports the rotor.
  • the rotor is fitted onto the end of the actuator's shaft. The rotor is rotated by electromagnetic force between the rotor and stator or by some other external force, or the actuator's shaft is rotated by some other external force, and the rotor is moved to its operating position using the threads.
  • the rotor is fitted onto the end of the actuator's shaft and initially rotated by an external force, after which it is moved using the threads to a position in which a static attractive force prevails between the stator and the rotor.
  • the rotor When the electrical machine is being connected to the actuator, it is possible that in connection with rotor installation, the rotor is moved to its operating position in relation to the actuator while the stator and the rotor are interlocked. In this case, the stator and the rotor are interlocked when the rotor shaft is fitted to the end of the actuator shaft. The stator and rotor will thus turn as a single entity on the actuator shaft. The interlock between the stator and the rotor will be eliminated once the stator and the rotor are supported by the actuator.
  • the shaft supporting the rotor is bearing-mounted onto the support.
  • An actuator with its own bearings typically has a body part containing the bearing housing for the actuator.
  • the bearing housing contains a bearing through which the actuator's shaft extends.
  • the shaft extends outside the actuator to some degree.
  • the rotor is attached directly to this end of the shaft.
  • the stator of the electrical machine is attached to the body part of the actuator so that the actuator's shaft is in the middle of the stator.
  • the air gap of the electrical machine is maintained by means of the actuator's bearings; the electrical machine as such has no bearings.
  • the actuator has an end shield containing the actuator's bearing housing.
  • the bearing housing contains a bearing through which the actuator's shaft extends.
  • the rotor is attached directly to this end of the actuator's shaft.
  • the end shield also typically has a guide for aligning the motor's stator and threaded screw holes for attaching the stator.
  • the actuator's shaft is bearing-mounted onto the actuator's end shield, and the stator of the electrical machine is attached to the actuator's end shield.
  • the method and arrangement according to the invention make it possible to install a rotor excited by permanent magnets into its operating position in a controlled manner.
  • the shaft supporting the rotor supports the rotor both axially and radially.
  • the outer surface of the rotor and the inner surface of the stator do not touch each other during installation.
  • the gap between the outer surface of the rotor and the inner surface of the stator - that is, the air gap - is without any installation support; in other words, no supports are needed that would keep the stator and the rotor apart and that would have to be removed after installation.
  • the great attractive force between the permanent magnet rotor and the stator can be controlled and even utilised.
  • the positioning and alignment of the rotor and the stator both mutually and in relation to the actuator will become faster and easier.
  • the method and the arrangement can be utilised in the assembly of the electrical machine as well as in the application.
  • the method and the arrangement are particularly preferred in applications in which a bearingless electrical machine is installed into an actuator.
  • the method for installing a rotor excited by permanent magnets into an electrical machine and the arrangement in an electrical machine excited by permanent magnets are applicable for use in several solutions utilising permanent-magnet technology.
  • the most common electrical machines fitted with permanent-magnet rotors are axial flux and radial flux machines. There are numerous applications, including lift motors, wind power generators, rubbish crushers, extruders, separators and mixers.
  • FIG. 1 illustrates an installation arrangement according to the invention at the initial phase of installation
  • FIG. 2 illustrates an installation arrangement according to the invention at the middle phase of installation
  • FIG. 3 illustrates an installation arrangement according to the invention at the final phase of installation
  • FIG. 4 illustrates an installation arrangement according to the invention at the initial phase of installation in an axial flux machine.
  • Figures 1-3 illustrate the installation of a rotor excited by permanent magnets into an electrical machine that is connected to an actuator operated by the electrical machine.
  • the stator 2 of the electrical machine with its body, is aligned and attached to the end shield 9.
  • the stator body is open at the end of the actuator 13.
  • the stator body may also be closed with a flange shield that has an opening in the middle, fitted with a seal to accommodate a shaft.
  • the end shield 9 contains the actuator's bearing housing that contains a bearing 10; the actuator's shaft 4 goes through the bearing.
  • the rotor sheet pack 3 is fitted with permanent magnets.
  • the outer diameter of the bushing 5 is equal to the inner diameter of the rotor sheet pack 3 referred to above.
  • the inner surface of the bushing 5 has threads 6 and a keyway 11 with a flange 7 at the end of the latter. Lengthwise the bushing 5 extends further than the end of the sheet pack 3 closer to the actuator 13. Threads 8 are machined onto the actuator shaft 4; the shape and pitch of the threads correspond to the threads 6 made on the inner surface of the bushing 5. A threaded extension part can also be attached to the shaft 4.
  • the combination of the bushing 5 and rotor sheet pack 3 can freely rotate in relation to the stator 2.
  • the combination of the bushing 5 and the rotor sheet pack 3 is rotated, which makes it screw along the shaft 4 into the stator 2.
  • the flux of the permanent magnets starts to close through the stator 2 and the magnetic attractive force begins to have its effect.
  • Fig. 3 Once the rotor 3 has turned into its operating position within the stator, it is locked in its position using a slot wedge 12 going into a keyway 11 between the bushing 5 and the actuator shaft 4 and/or using flange mounting 7, 15. The air gap 14 of the electrical machine is maintained by means of the actuator bearings 10. Any removal of the rotor 3 is carried out in reverse order.
  • the installation of the rotor of an electrical machine illustrated in Fig. 1 can be carried out correspondingly on the shaft of an installation support, for example.
  • the rotor threads can also be implemented on the inner surface of the rotor, as is the case with the keyway.
  • Fig. 3 illustrates the installation of a rotor excited by permanent magnets into an electrical machine with an actuator attached.
  • the stator and rotor are interlocked once the rotor has rotated to the correct position.
  • Fig. 4 illustrates the first phase of installation of the rotor 3 into an electrical machine 1 and the attached actuator 13.
  • the method and arrangement are similar to those in Fig. 1 but the type of electrical machine is an axial flux machine.
  • the rotor 3 can freely rotate in relation to the stator 2. The rotor 3 is rotated and therefore starts to screw towards the stator 2 along the shaft 4.
  • the rotor 3 hi an axial flux machine, the rotor 3 is not installed into the stator 2; the rotor 3 is turned to the distance of the air gap in relation to the stator 2, which places it in its operating position. The rotor 3 is rotated until the bushing 5 meets the nut 16 prearranged on the shaft, which serves as a stop support.
  • the stop support can also be a collar machined onto the shaft, in which case the shaft does not need to have a long threaded part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Abstract

L'invention concerne un procédé pour installer un rotor (3) excité par des aimants permanents dans une machine électrique (13) utilisant un support, la machine électrique comprenant un stator (2) et un rotor (3). Le support contient un arbre (4) supportant le rotor (3). Le rotor (3) est mis en rotation, ou l'arbre (4) supportant le rotor est mis en rotation, après quoi le rotor (3) est déplacé sur sa position de fonctionnement avec l'aide de filetages (6, 8) mutuellement correspondants agencés sur le rotor (3) et l'arbre (4) supportant le rotor.
PCT/FI2006/000342 2005-10-28 2006-10-24 Procédé et agencement dans une machine électrique excitée par des aimants permanents WO2007051895A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20051090 2005-10-28
FI20051090A FI20051090L (fi) 2005-10-28 2005-10-28 Menetelmä ja järjestely kestomagneeteilla magnetoidussa sähkökoneessa

Publications (1)

Publication Number Publication Date
WO2007051895A1 true WO2007051895A1 (fr) 2007-05-10

Family

ID=35185223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2006/000342 WO2007051895A1 (fr) 2005-10-28 2006-10-24 Procédé et agencement dans une machine électrique excitée par des aimants permanents

Country Status (2)

Country Link
FI (1) FI20051090L (fr)
WO (1) WO2007051895A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2385614A1 (fr) * 2010-05-06 2011-11-09 The Switch Drive Systems Oy Machine électrique et procédé pour l'assembler
CN102570680A (zh) * 2011-11-29 2012-07-11 东方电气集团东方电机有限公司 永磁风力发电机转子的对中支撑装置及更换转子轴承方法
WO2012158103A1 (fr) * 2011-05-17 2012-11-22 Xylem Ip Holdings Llc Moteur électrique pour une machine submersible
FR2986922A1 (fr) * 2012-02-15 2013-08-16 Hamilton Sundstrand Corp Procede d'assemblage d'un moteur electrique
US8629591B2 (en) 2010-05-06 2014-01-14 Moventas Gears Oy Electromechanical device
US9464691B2 (en) 2010-05-06 2016-10-11 The Switch Drive Systems Oy Electromechanical device
US9525320B2 (en) 2010-05-06 2016-12-20 Moventas Gears Oy Electromechanical device with included gear stages and internal lubrication system
NO341838B1 (en) * 2017-01-26 2018-02-05 Rolls Royce Marine As Method for internal access in an electric machine.
CN109698587A (zh) * 2017-10-20 2019-04-30 株洲中车机电科技有限公司 一种永磁电机定子、转子及轴承一次合装精密导向装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421115A (en) * 1943-02-05 1947-05-27 Frank L Lindstrom Method of securing laminations on a rotor shaft
DE2415582A1 (de) * 1974-03-30 1975-10-09 Licentia Gmbh Laeuferanordnung
EP0855781A1 (fr) * 1997-01-27 1998-07-29 HILTI Aktiengesellschaft Moteur électrique à collecteur
EP0953668A1 (fr) * 1998-04-30 1999-11-03 Miele & Cie. GmbH & Co. Méthode pour la fabrication d'un appareil de traitement du linge en particulier d'assemblage du moteur d'entraínement, et un appareil de traitement du linge
US6376954B1 (en) * 1997-12-11 2002-04-23 Empresa Brasileira De Compressores S./A -Sembraco Hermetic compressor for a refrigeration system
DE10058407A1 (de) * 2000-11-24 2002-05-29 Bsh Bosch Siemens Hausgeraete Verfahren und Vorrichtung zur Montage eines Außenläufers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421115A (en) * 1943-02-05 1947-05-27 Frank L Lindstrom Method of securing laminations on a rotor shaft
DE2415582A1 (de) * 1974-03-30 1975-10-09 Licentia Gmbh Laeuferanordnung
EP0855781A1 (fr) * 1997-01-27 1998-07-29 HILTI Aktiengesellschaft Moteur électrique à collecteur
US6376954B1 (en) * 1997-12-11 2002-04-23 Empresa Brasileira De Compressores S./A -Sembraco Hermetic compressor for a refrigeration system
EP0953668A1 (fr) * 1998-04-30 1999-11-03 Miele & Cie. GmbH & Co. Méthode pour la fabrication d'un appareil de traitement du linge en particulier d'assemblage du moteur d'entraínement, et un appareil de traitement du linge
DE10058407A1 (de) * 2000-11-24 2002-05-29 Bsh Bosch Siemens Hausgeraete Verfahren und Vorrichtung zur Montage eines Außenläufers

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9464691B2 (en) 2010-05-06 2016-10-11 The Switch Drive Systems Oy Electromechanical device
CN102237742A (zh) * 2010-05-06 2011-11-09 斯维奇传动系统有限公司 电力机器及用于组装电力机器的方法
US8841815B2 (en) 2010-05-06 2014-09-23 The Switch Drive Systems Oy Electrical machine with guide bars for facilitating assembly and a method for assembling the electrical machine
EP2385614A1 (fr) * 2010-05-06 2011-11-09 The Switch Drive Systems Oy Machine électrique et procédé pour l'assembler
US9525320B2 (en) 2010-05-06 2016-12-20 Moventas Gears Oy Electromechanical device with included gear stages and internal lubrication system
US8629591B2 (en) 2010-05-06 2014-01-14 Moventas Gears Oy Electromechanical device
US9461517B2 (en) 2011-05-17 2016-10-04 Xylem Holdings Llc Electrical motor for a submersible machine
WO2012158103A1 (fr) * 2011-05-17 2012-11-22 Xylem Ip Holdings Llc Moteur électrique pour une machine submersible
CN102570680A (zh) * 2011-11-29 2012-07-11 东方电气集团东方电机有限公司 永磁风力发电机转子的对中支撑装置及更换转子轴承方法
CN103259375A (zh) * 2012-02-15 2013-08-21 哈米尔顿森德斯特兰德公司 组装电动马达的方法
FR2986922A1 (fr) * 2012-02-15 2013-08-16 Hamilton Sundstrand Corp Procede d'assemblage d'un moteur electrique
NO341838B1 (en) * 2017-01-26 2018-02-05 Rolls Royce Marine As Method for internal access in an electric machine.
NO20170116A1 (en) * 2017-01-26 2018-02-05 Rolls Royce Marine As Method for internal access in an electric machine.
CN109698587A (zh) * 2017-10-20 2019-04-30 株洲中车机电科技有限公司 一种永磁电机定子、转子及轴承一次合装精密导向装置

Also Published As

Publication number Publication date
FI20051090L (fi) 2007-04-29
FI20051090A0 (fi) 2005-10-28

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