EP2104975A1 - Induit à aimants permanents présentant des fentes de refroidissement radiales et procédé de réalisation correspondant - Google Patents

Induit à aimants permanents présentant des fentes de refroidissement radiales et procédé de réalisation correspondant

Info

Publication number
EP2104975A1
EP2104975A1 EP07857820A EP07857820A EP2104975A1 EP 2104975 A1 EP2104975 A1 EP 2104975A1 EP 07857820 A EP07857820 A EP 07857820A EP 07857820 A EP07857820 A EP 07857820A EP 2104975 A1 EP2104975 A1 EP 2104975A1
Authority
EP
European Patent Office
Prior art keywords
permanent magnets
rotor
partial laminated
pockets
rotor according
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Withdrawn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
EP07857820A
Other languages
German (de)
English (en)
Inventor
Andreas JÖCKEL
Thomas Schmidt
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
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP2104975A1 publication Critical patent/EP2104975A1/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Withdrawn legal-status Critical Current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
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • 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
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49012—Rotor

Definitions

  • the present invention relates to a rotor of an electric machine with a plurality of partial laminated cores, each having a defined distance from each other in the axial direction, so that radial cooling slots are formed. Moreover, the present invention relates to a method for producing such a rotor. These runners can be used in an engine but especially in a generator.
  • FIG 1 Such a machine is shown in FIG 1 in a partially sectioned view.
  • the generator 1 has a rotor 2 with an axially segmented laminated core.
  • Individual partial sheet packets 3 are joined together on a shaft 4 to form the overall laminated core.
  • the individual partial laminated cores 3 are spaced apart from each other so that radially formed cooling slots 5 result.
  • the shaft 4 is equipped with a slip ring unit 6 to tap the generated current.
  • the associated slip rings 7 and the three double brushes 8 can be seen.
  • the stator 9 of the generator 1 is provided with radial cooling slots.
  • the heat dissipation from the generator 1 takes place with an air-air heat exchanger 10. This blows outside cooling air 11 in the axial direction of the generator 1 by cooling rods 12 in the interior of the heat exchanger 10. Die
  • Cooling air inside the cooling rods 12 absorbs the heat of the generator 1 and transports it from the other end Heat exchanger 10, which is shown in FIG. 1 as heated exhaust air 13.
  • the interior of the generator 1 is used together with the interior of the air-to-air heat exchanger 10 for a closed cooling circuit 14.
  • a closed cooling circuit cool air is injected axially into the rotor laminations.
  • the cooling air flows through the radial cooling slots of the rotor 2 and the stator 9 and heats up.
  • the heated air flows into the heat exchanger 10 and is cooled at the cooling tubes 12. Subsequently, it is conveyed back to the runner 2. Due to the closed cooling circuit, contamination of the generator, for example, by dust, salt water, etc., can be avoided.
  • PM machines permanent magnet machines
  • internal magnets are also known.
  • the permanent magnets are located below the lateral surface of the rotor core in specially designated pockets.
  • the permanent magnets can be inserted axially into the respective pockets during assembly.
  • the problem with these PM machines is the effective cooling of the rotor.
  • the object of the present invention is therefore to propose a structurally simple rotor for an electric machine, which can be cooled with high efficiency.
  • a rotor of an electric machine having a plurality of partial laminated cores which each have a defined distance from one another in the axial direction, so that radial cooling slots are formed, and permanent magnets, which are arranged in each of the partial laminated cores in inner pockets Dimension of each permanent magnet in the axial direction does not or only slightly exceeds the axial dimension of the respective partial laminated core.
  • the invention provides a method for producing a rotor by mounting the plurality of partial laminated cores at the respectively defined distance from one another and inserting the permanent magnets for a first of the partial laminated cores through the inner pockets of a second of the partial laminated cores in the axial direction in the first partial laminated core.
  • the permanent magnets have the same axial dimension as the associated partial laminated core.
  • the permanent magnets do not protrude into the radial cooling slots, which extend in a disk shape around the shaft of the rotor radially outward. They do not hinder the radial cooling flow.
  • the permanent magnets in the pockets can be potted with resin. As a result, they are permanently fixed in the pockets.
  • the permanent magnets can be embedded in their pockets with a nonwoven.
  • suitable for this purpose preformed boxes made of compressible fleece material.
  • a nonwoven strip can also be introduced laterally next to a permanent magnet between the permanent magnet and an inner wall of the respective pocket in the circumferential direction. These then provide special fixation in the circumferential direction.
  • the nonwoven material can be impregnated with the resin, whereby the resin in the gaps between the permanent magnet and laminated core can be better kept.
  • FIG. 1 shows a partial cross-sectional view of a generator
  • Air-to-air heat exchanger according to the prior art; 2 shows a plan view of a rotor with radial cooling slots;
  • FIG. 3 shows an end view of a partial laminated core with nen lying permanent magnet
  • FIG. 4 shows a detail of FIG. 2
  • a rotor with internal permanent magnets which has radial cooling slots.
  • the following specifications must be observed: -
  • the magnets to be inserted axially from the outside must pass through the partial laminations of the rotor can be pushed over the cooling slots in their position.
  • the magnets must remain "centered” in the center until the casting resin finally fixes them.
  • the magnets and the resin must remain safely inside the partial laminated cores.
  • the magnetic disks must not be loosened as a whole nor may they break off parts of them and migrate through the radial cooling slot into the air gap area (danger of winding destruction).
  • the resin When casting (preferably a dip-impregnation), the resin must run out of the radial cooling slots, but remain in the tenth columns between the magnet and the component sheet package due to the capillary action and harden there.
  • a runner is formed from a plurality of partial laminated cores 20 according to FIG.
  • the partial tin packages are axially spaced apart by means of corresponding webs 21. This results in radial cooling slots 22, which have the shape of discs.
  • FIG. 3 the end view of one of these partial sheet metal panels 20 is shown in a section. It can be seen that a pocket 23 for a permanent magnet 24 is provided underneath the lateral surface of the partial laminated core 20.
  • the PM rotor or each of its partial laminated cores 20 is therefore equipped with internal permanent magnets 24, ie no surface magnets.
  • the magnetic flux may increase.
  • the magnetic plate or the magnet 24 has exactly the same length as the partial laminated core 20.
  • a pocket 23 more permanent magnets in arranged axially one behind the other, which together have the axial dimension of the partial laminated core. In any case, this ensures that the magnet or magnets do not protrude into the radial vent slot 22.
  • the magnets 24 are inserted axially into the pockets 23 from one side or from two sides (with a staggered rotor).
  • the magnets are pushed through correspondingly through the pockets of one or more partial laminated cores.
  • the magnets slide over the cooling slots and are always centered exactly in the partial laminated cores due to the magnetic forces.
  • both the magnet assembly is feasible in a simple manner as well as laid in operation the basis for a safe retention of the magnets in the laminated core.
  • the magnets are additionally fixed in the pockets 23, for example with resin.
  • the rotor is dipped into the resin for this purpose like a slip ring rotor. After pulling out the resin runs out of the large slots again and thus releases the louvers or cooling slots. In the tenth columns between the magnet and the sheet, however, the resin remains suspended and is subsequently hardened in a rotating manner. This embodiment is not shown in the figures.
  • the magnetic pockets 23 each have lateral che recesses 25 through which a continuous non-woven strip 26 is pushed before the resin impregnation.
  • the entire runner is finally impregnated with resin.
  • This can be done either by dipping, rolling or a VPI process.
  • the fleece strips bind the resin and thus ensure a firm lateral attachment and fixation of the magnetic plate inside the respective partial laminated core.
  • the nonwoven strips 26 swell during impregnation outside the partial laminated core 20, that is, in the cooling slot 22, and after hardening fix the magnetic plate 24 axially by positive locking.
  • the magnetic pockets may be provided with preformed boxes of compressible nonwoven material.
  • they consist externally of a solid material.
  • fleece material for example, a VVL fleece can be used.
  • the present invention thus makes it possible to combine the two basic design principles "active part with radial cooling slots” and “permanent magnets located inside the rotor core.” This is essential for the use of PM runners, even for very large “modular” machines or wind power generators, and has the following advantages, some of which have already been suggested:
  • the cold cooling air is first led through the PM rotor. This results in not only a "cold" runner, but also a secure magnetic fixation, a high magnetic flux and a high efficiency.
  • the resin impregnation process (immersion and rotary hardening) of the PM rotor can be completely taken over by slip ring rotors.
  • a resin potting process with vertical runner can be omitted.
  • Such an electric machine with a rotor according to the invention is particularly suitable for wind turbines as a generator and as a modular electrical machine for industrial use.
  • cooling modules with x or z ventilation are suitable for the modular design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention a pour objet la mise à disposition d'un induit de structure simple ayant un rendement élevé. Pour cela, l'invention concerne un induit qui se compose de plusieurs paquets de tôle individuels (20) qui sont séparés les uns des autres en direction axiale respectivement par une distance définie de sorte que des fentes de refroidissement radiales (22) sont formées. Des aimants permanents (24) sont disposés dans chacun des paquets de tôle individuels (20) dans des poches (23) internes. La dimension de chaque aimant permanent (24) en direction axiale ne dépasse pas la dimension axiale du paquet de tôle individuel (20) respectif, ou la dépasse seulement de manière insignifiante. Lors du montage, ont fait glisser les aimants permanents (24) à travers les poches (23) internes axialement en direction du paquet de tôle individuel (20) respectif. On peut ainsi obtenir un induit à fentes de refroidissement radiales et aimants permanents internes qui possède un rendement très élevé.
EP07857820A 2006-12-22 2007-12-19 Induit à aimants permanents présentant des fentes de refroidissement radiales et procédé de réalisation correspondant Withdrawn EP2104975A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006061372A DE102006061372A1 (de) 2006-12-22 2006-12-22 PM-Läufer mit radialen Kühlschlitzen und entsprechendes Herstellungsverfahren
PCT/EP2007/064197 WO2008077855A1 (fr) 2006-12-22 2007-12-19 Induit à aimants permanents présentant des fentes de refroidissement radiales et procédé de réalisation correspondant

Publications (1)

Publication Number Publication Date
EP2104975A1 true EP2104975A1 (fr) 2009-09-30

Family

ID=39264238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07857820A Withdrawn EP2104975A1 (fr) 2006-12-22 2007-12-19 Induit à aimants permanents présentant des fentes de refroidissement radiales et procédé de réalisation correspondant

Country Status (5)

Country Link
US (1) US7948134B2 (fr)
EP (1) EP2104975A1 (fr)
CN (1) CN101569077B (fr)
DE (1) DE102006061372A1 (fr)
WO (1) WO2008077855A1 (fr)

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ES2654612T3 (es) * 2009-06-18 2018-02-14 Bombardier Transportation Gmbh Rotor para máquina eléctrica de un vehículo sobre carriles, una tal máquina y un vehículo sobre carriles que posee tal máquina
DE102009032885A1 (de) * 2009-07-13 2011-02-03 Siemens Aktiengesellschaft Ringförmiger Rotor für eine elektrische Maschine
EP2434618B1 (fr) * 2010-09-24 2014-03-19 Siemens Aktiengesellschaft Rotor à segment d'une machine électrique
DK2508749T3 (da) 2011-04-04 2013-12-16 Siemens Ag Fremgangsmåde til montering af en elektrisk maskine
DE102012011445A1 (de) * 2011-06-21 2012-12-27 Asmo, Ltd. Motor mit einem Rotor und Verfahren zur Herstellung des Rotors
US20130099617A1 (en) * 2011-10-24 2013-04-25 Bradley D. Chamberlin Electric machine with magnet holder
DE102011088540A1 (de) * 2011-12-14 2013-06-20 Bayerische Motoren Werke Aktiengesellschaft Elektrische Maschine sowie Verfahren zur Herstellung einer elektrischen Maschine
NO333881B1 (no) * 2012-03-26 2013-10-07 Rolls Royce Marine As Rotor omfattende segmentert åk
US20130342065A1 (en) * 2012-05-08 2013-12-26 Asmo Co., Ltd. Brushless motor and method for manufacturing brushless motor
US20140028139A1 (en) * 2012-07-26 2014-01-30 Colin Hamer Permanent magnet rotor with resin-covered magnet and lamination for thermal control
DE102013108461A1 (de) * 2012-08-09 2014-02-13 Remy Technologies, L.L.C. Dauermagnet- (PM-) Elektromaschine, die mit einem Wärmeleitmaterial (TIM) zwischen benachbarten Dauermagneten versehen ist
DE102012016927A1 (de) * 2012-08-27 2014-02-27 Volkswagen Aktiengesellschaft Rotor einer elektrischen Maschine mit darin angeordneten Permanentmagneten sowie Montageverfahren zur Fixierung von Permanentmagneten in dem Rotor einer elektrischen Maschine
DE102014217432A1 (de) 2014-09-01 2016-03-03 Volkswagen Aktiengesellschaft Verfahren und Einrichtung zur Befestigung eines Magneten in einer Aufnahmetasche, elektrische Maschine oder Primärteil derselben
JP6480789B2 (ja) * 2015-04-13 2019-03-13 本田技研工業株式会社 回転電機のロータ
DE102015218924A1 (de) * 2015-09-30 2017-03-30 Siemens Aktiengesellschaft Elektrische Maschine mit exakter Positionierung von Rotormagneten
DE102017213890B4 (de) * 2017-08-09 2025-12-24 Schaeffler Technologies AG & Co. KG Verfahren zur Fixierung eines Permanentmagnets in einem Rotorblechpaket für eine elektrische Maschine
JP6548276B2 (ja) * 2017-10-04 2019-07-24 本田技研工業株式会社 回転電機のロータ
DE102017223042A1 (de) * 2017-12-18 2019-06-19 Volkswagen Aktiengesellschaft Rotor- oder Statoranordnung mit Permanentmagneten
KR102527782B1 (ko) * 2017-12-18 2023-05-02 엘지이노텍 주식회사 로터 및 이를 구비하는 모터
CN110266155B (zh) * 2019-06-24 2024-02-13 湖州越球电机有限公司 一种双内水冷四极斜磁正弦波充磁头
JP2022107335A (ja) * 2021-01-08 2022-07-21 トヨタ自動車株式会社 モータの磁石油冷構造及びモータ
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Also Published As

Publication number Publication date
US7948134B2 (en) 2011-05-24
DE102006061372A1 (de) 2008-06-26
WO2008077855A1 (fr) 2008-07-03
CN101569077A (zh) 2009-10-28
US20090289517A1 (en) 2009-11-26
CN101569077B (zh) 2012-07-25

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Effective date: 20130702