EP3143679A1 - Générateur synchrone pour éolienne à entraînement direct - Google Patents

Générateur synchrone pour éolienne à entraînement direct

Info

Publication number
EP3143679A1
EP3143679A1 EP15718860.8A EP15718860A EP3143679A1 EP 3143679 A1 EP3143679 A1 EP 3143679A1 EP 15718860 A EP15718860 A EP 15718860A EP 3143679 A1 EP3143679 A1 EP 3143679A1
Authority
EP
European Patent Office
Prior art keywords
synchronous generator
generator according
stator
groove
distance
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Withdrawn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
EP15718860.8A
Other languages
German (de)
English (en)
Inventor
Jochen RÖER
Wojciech GIENGIEL
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.)
Wobben Properties GmbH
Original Assignee
Wobben Properties GmbH
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 Wobben Properties GmbH filed Critical Wobben Properties GmbH
Publication of EP3143679A1 publication Critical patent/EP3143679A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor 
    • F03D3/002—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor  the axis being horizontal
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H02K1/165—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • 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
    • 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
    • Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction

Definitions

  • the present invention relates to a synchronous generator, in particular a multi-pole synchronous ring generator of a gearless wind turbine. Furthermore, the present invention relates to a generator stator for such a synchronous generator and to a wind turbine with such a synchronous generator.
  • the German Patent and Trademark Office has investigated the following documents DE 10 2011 078 025 A1, US 2005/0 029889 A1, AT 513 114 A1, DE 20 1011 078025 A1 and US 2005/0 218 744 A1.
  • Wind turbines are well known They generate electricity from wind by means of a generator.
  • Modern gearless wind turbines often have a much pol igen synchronous ring generator with a large air gap diameter.
  • the diameter of the air gap is at least four meters and usually extends to almost five meters.
  • Synchronous generators composed of several parts may well have air gap diameters in the range of ten meters or more.
  • the efficiency of the synchronous generator significantly influences the efficiency of the entire wind turbine when generating electricity. In order to achieve the highest possible efficiency in power generation, it is therefore important to make the stator winding optimal. This also includes, as far as possible to accommodate a large number Lelterböndel in the stator winding.
  • a synchronous generator in particular a much pol iger synchronous ring generator of a gearless wind turbine, proposed for generating electric current, with a rotor and a Stator, wherein the stator has a plurality of grooves for receiving a stator winding in the form of conductor bundles, wherein the grooves each have a groove bottom, the surface is profiled such that when filling a first, groove base layer conductor bundle occupies a predetermined orientation by the profile.
  • multi-pole in a synchronous ring generator of a gearless wind turbine is meant a plurality of stator poles, in particular a training with at least 48 stator teeth, often even significantly more stator teeth such as 96 stator teeth or even more stator teeth.
  • the magnetically active region of the generator namely both the rotor, which can also be referred to as a rotor, and the stator is arranged in an annular region about the axis of rotation of the synchronous generator.
  • a range of 0 to at least 50 percent of the radius of the air gap is free of materials that carry electrical current or electric field of the synchronous generator. In particular, this interior is completely free and basically accessible.
  • this range is also more than 0 to 50 percent of the air gap radius, in particular up to 0 to 70 percent or even 0 to 80 percent of the air gap radius.
  • a support structure may be present in this inner region, but in some embodiments it may be formed axially offset.
  • synchronous generators of a gearless wind turbine are slowly rotating generators. Under slowly rotating here is understood depending on the size of the system, a speed of less than 40 revolutions per minute, in particular from about 4 to 35 revolutions per minute.
  • the invention is based on the recognition that poor space utilization within a slot of the stator occurs when the lowest-lying layers in the groove, that is, closest to the groove base, are routed irregularly.
  • the invention starts, in that a starting profile for the filling with conductor bundles is specified on the groove base by means of profiling. Due to the profiling of the groove bottom, the conductor bundles, which are first filled in the groove, are placed in a predetermined orientation. According to the invention, this first layer then forms, as it were, a follow-up profile for the second layer of conductor bundles to be filled into the groove by means of the already pre-oriented conductor bundle. That in turn forms the next following profile for the layerêtbündei to be arranged above, and so on.
  • the entire structure of the conductor bundles in the groove becomes more uniform.
  • the degree of filling also referred to as the packing density increases within the groove.
  • the respective underlying bundles of conductors are automatically printed in a uniform complaint - and occupy a corresponding position between the already laid bundles of conductors.
  • the decisive factor is simply that the number of conductor bundles placed there is determined by the profile of the groove base area, and that these are kept at a distance from one another. See in particular the below explained advantageous further education.
  • the profile has one or more projections which project from the groove base, and or one or more recesses, which are embedded in the groove bottom.
  • the profile is adapted to position the nutgrundseitkjen Porterbündei at a distance A to each other, which is selected so that the maximum number of layers in the first layer Baren Porterbündei is reduced compared to an unprofiled groove bottom It may initially seem counterproductive, not so to pack many letter bundles as possible into the bottom side bottom layer. In fact, it has been found within the scope of the invention that it is straight Such limitation is also advantageous, which leads to a uniform formation of the letter bundle structure in the groove.
  • a distance A 'between adjacent projections or between adjacent recesses is substantially equal to the distance A between the respective adjacent conductor bundles within a layer of letter bundles.
  • the term distance means the center distance, that is to say the distance from center to center of a respective conductor bundle or from center to center of a respective projection or a respective recess.
  • the distance A 'between adjacent projections and or adjacent recesses depending on the diameter d of the conductor bundles is selected such that each conductor bundle of a second layer stacked on the first layer bears against two adjacent conductor bundles from the underlying first layer.
  • the distance A 'or A is in a range of 1.5 times to 1.85 times the conductor bundle diameter d.
  • the distance A or A ' is in a range from 1.7 times to 1.75 times the conductor bundle diameter d.
  • the distance A or A ' is the - times the conductor bundle diameter d.
  • the grooves each extend from one revolution! surface of the stator inwards and have a constant groove width B on.
  • they have two parallel groove walls which extend from the circumferential surface towards the groove base.
  • the groove width B results as the sum of the conductor bundle diameter and a product of the letter bundle diameter d and the coefficient C, or an integer positive multiple of this product.
  • "n" is one Less than the number of conductor bundles, the two adjacent layers, for example, the first, the groove bottom closest layer and the subsequent second layer can be sorted.
  • C is in the range of 0.86 to 0.87. Particularly preferred is.
  • the projections of the profile have a height h above the groove base, which is in each case at most half of the conductor bundle diameter D.
  • the recesses of the profile have a depth into the groove base, which is in each case at most half of the conductor bundle.
  • the projections and or recesses on the groove bottom towards beveled side surfaces This facilitates the filling of the groove with the nutgrundseltigen, first layer of conductor bundles.
  • the inserted conductor bundles can slide along the oblique to the groove bottom and are brought in this way faster in their intended position
  • the invention thus proposes a stator of a synchronous generator, in particular a multipole synchronous ring generator of a gearless wind turbine, wherein the stator has a plurality of grooves for receiving a stator winding in the form of conductor bundles, wherein the grooves each one Have groove base, the surface is profiled so that when filling a first base side layer of conductor bundles assumes a predetermined by the profile orientation
  • the stator described above solves the problem underlying the synchronous generator according to the invention in the same way.
  • stator according to the invention is preferably developed in the same way as the synchronous generator according to the invention, so reference is made to the above-described preferred embodiments of the synchronous generator with respect to preferred embodiments of the stator.
  • the invention further relates to a wind turbine, in particular a gearless wind turbine, with a synchronous generator.
  • a wind turbine in particular a gearless wind turbine
  • a synchronous generator According to the invention, it is proposed that the synchronous generator is designed according to one of the preferred embodiments described above
  • FIG. 1 shows a wind turbine schematically in a perspective view
  • FIG. 2 shows a gondola of the wind power plant according to FIG. 1 schematically in a perspective sectional view
  • FIG. 3 simplifies a schematic perspective view of a stator of FIG
  • Figure 4a is a schematic cross-sectional view of a groove in a stator according to the prior art.
  • Figure 4b is a schematic cross-sectional view of a groove of an inventive
  • Figure 1 shows a wind turbine 100 with a tower 102 and a nacelle 104.
  • a rotor 106 with three rotor blades 108 and a spinner 110 is arranged
  • the rotor 106 is in Betri eb by the wind in a rotational movement and thereby drives a Generator 1 ( Figure 2) in the nacelle 104 at.
  • the nacelle 104 is shown in FIG.
  • the nacelle 104 is rotatably mounted on the tower 102 and driven by an azimuth drive 7 in a generally known manner.
  • a machine carrier 9, which holds a synchronous generator 1 is arranged in the nacelle 104.
  • the synchronous generator 1 is formed according to the present invention and is in particular a slow-rotating, multi-pole synchronous ring generator.
  • the synchronous generator 1 has a stator 3 and an internal rotor 5, also referred to as a rotor.
  • the rotor or rotor 5 is connected to a rotor hub 13, which transmits the rotational movement of the rotor blades 108 caused by the wind to the synchronous generator 1.
  • FIG. 3 shows the stator 3 in isolation.
  • the stator 3 has a stator ring 16 with an inner circumferential surface 18.
  • the inner circumferential surface is bounded by a first end face 14 and a second end face 16 opposite the first end face 14.
  • a plurality of grooves 17 are provided in the inner circumferential surface 18, which are provided for receiving the stator winding in the form of conductor bundles 25, 27, 29 (FIG. 4b) ) are formed.
  • the structural design of the grooves 17 is shown in FIG. 4b.
  • the grooves 17 extend between the first end face 14 and the second end face 16 and are aligned parallel to a longitudinal axis A.
  • the longitudinal axis A is the axis of rotation of the rotor 5 in the generator 1.
  • FIG. 4a shows a groove 17 of a stator 3 according to the invention or synchronous generator 1.
  • the groove 17 has a groove width B.
  • the groove is bounded laterally by two parallel side walls 19 a, b, which extend from the circulation surface 18 (FIG. 3) to a groove bottom 21.
  • a plurality of, in the present example, four, inwardly projecting VorsprQnge 23 are formed, each having a height h with respect to the groove bottom 21.
  • the protrusions 23 are arranged at a distance of A 'from each other. Due to the arrangement of the projections, a first, base-side layer 25 of conductor bundles L is arranged in the groove 17 at the bottom.
  • TheêtbOndel of the first layer 25 are arranged to each other at a distance A, due to the projections 23.
  • the distance A corresponds to the distance A 'of the VorsprQnge each other, in each case the distances of the center points are considered to each other.
  • the projections 23 orientation of the conductor bundles L of the first layer 25 are in continuous filling conductor bundles L in a second layer 27 respectively inserted into the groove that they in the gaps or .Täemper "between two adjacent conductor bundles L of the first layer A uniform spacing of the projections 23 relative to each other thus results not only in a uniform spacing of the conductor bundles L of the first layer 25 but also a uniform spacing of the conductor bundles L of the second layer 27.
  • the height h is less than or equal to half the letter bundle diameter d.
  • the distance A between two adjacent conductor bundles is in a range of 1.5 times to 1.85 times the conductor bundle diameter d ,
  • each conductor bundle with the exception of the conductor bundles arranged at the edges of the groove 17-side walls 19a, b and groove base 21-are six closest Neighbors, ideally with three nearest bundles of wires each an equilateral triangle span each other.
  • This achieves an optimized filling or packing density in comparison with the illustration according to FIG. 4a.
  • Particularly preferred are the Projections 23 formed of the same material as the conductor bundles L, whereby the space occupied by the projections 23 can still be used.
  • Each sub-layer of the second layer 27 and each subsequent layer 29 is preferably located at two points of contact on respectively underlying letter bundles.
  • the conductor bundles L of the second layer 27 may also come into contact with the projections 23, although due to the limited height h of the projections 23, the formation of an irregularity is restricted.
  • the width B of the groove 17 according to FIG. 4b in the present case is .d (1 + 7C), where C is in the range from 0.85 to 0.95.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Windings For Motors And Generators (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Wind Motors (AREA)

Abstract

L'invention concerne un générateur synchrone (1), en particulier un générateur synchrone annulaire multipolaire destiné à une éolienne à entraînement direct (100) servant à produire du courant électrique, qui possède un rotor (4) et un stator (3). Selon l'invention, le stator (3) comporte une pluralité d'encoches (17) destinées à recevoir un enroulement statorique sous la forme de faisceaux de conducteurs (L). Les encoches possèdent chacune un fond d'encoche (21) dont la surface est dotée d'un profil tel que, lors du remplissage, une première couche (25) côté fond d'encoche du faisceau de conducteurs prend une orientation prédéfinie par ce profil. L'invention concerne en outre un stator (3) destiné à un tel générateur, ainsi qu'une éolienne (100) équipée d'un tel générateur.
EP15718860.8A 2014-05-13 2015-04-23 Générateur synchrone pour éolienne à entraînement direct Withdrawn EP3143679A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014209006.7A DE102014209006A1 (de) 2014-05-13 2014-05-13 Synchrongenerator einer getriebelosen Windenergieanlage
PCT/EP2015/058774 WO2015172991A1 (fr) 2014-05-13 2015-04-23 Générateur synchrone pour éolienne à entraînement direct

Publications (1)

Publication Number Publication Date
EP3143679A1 true EP3143679A1 (fr) 2017-03-22

Family

ID=53008489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15718860.8A Withdrawn EP3143679A1 (fr) 2014-05-13 2015-04-23 Générateur synchrone pour éolienne à entraînement direct

Country Status (9)

Country Link
US (1) US20170264165A1 (fr)
EP (1) EP3143679A1 (fr)
CN (1) CN106415997A (fr)
AR (1) AR101160A1 (fr)
CA (1) CA2948207A1 (fr)
DE (1) DE102014209006A1 (fr)
TW (1) TWI578665B (fr)
UY (1) UY36119A (fr)
WO (1) WO2015172991A1 (fr)

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DE19643561C1 (de) * 1996-10-22 1998-01-15 Wolfgang Hill Elektrische Maschine mit einer Einzelpolwicklung
SE516002C2 (sv) * 2000-03-01 2001-11-05 Abb Ab Roterande elektrisk maskin samt förfarande för framställning av en statorlindning
US7242474B2 (en) * 2004-07-27 2007-07-10 Cox James A Cytometer having fluid core stream position control
JP3587246B2 (ja) * 2000-10-13 2004-11-10 トヨタ自動車株式会社 電気モータ
WO2004038893A1 (fr) * 2002-10-22 2004-05-06 Mitsubishi Denki Kabushiki Kaisha Rotor pour machine dynamo-electrique
US7412588B2 (en) * 2003-07-25 2008-08-12 International Business Machines Corporation Network processor system on chip with bridge coupling protocol converting multiprocessor macro core local bus to peripheral interfaces coupled system bus
ES2318963B1 (es) * 2006-05-30 2010-02-04 GAMESA INNOVATION & TECHNOLOGY, S.L. Utilizacion de laminacion de grano orientado en un generador de turbina eolica.
FR2905534B1 (fr) * 2006-08-31 2009-10-30 Valeo Equip Electr Moteur Stator pour machine electrique tournante, notamment un alternateur de vehicule automobile
AR072601A1 (es) * 2008-07-30 2010-09-08 Appleton Paper Inc Particulas de entrega
DE102011078025A1 (de) * 2011-06-23 2012-12-27 Siemens Aktiengesellschaft Wickelkopfträger für einen Stator einer elektrischen Maschine
DE102011081030A1 (de) * 2011-08-16 2013-02-21 Robert Bosch Gmbh Wicklungsträger zur Verwendung in einer elektrischen Maschine sowie Wicklungsanordnung
JP5664927B2 (ja) * 2011-11-21 2015-02-04 アイシン・エィ・ダブリュ株式会社 導体線及び回転電機
DE102012208547A1 (de) * 2012-05-22 2013-11-28 Wobben Properties Gmbh Synchrongenerator einer getriebelosen Windenergieanlage
AT513114B1 (de) * 2012-06-27 2016-01-15 Egston System Electronics Eggenburg Gmbh Spulenwicklung
TWM452533U (zh) * 2012-12-28 2013-05-01 Bi Da Technology Co Ltd 中空式發動發電裝置

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Also Published As

Publication number Publication date
UY36119A (es) 2016-01-08
CN106415997A (zh) 2017-02-15
US20170264165A1 (en) 2017-09-14
TWI578665B (zh) 2017-04-11
AR101160A1 (es) 2016-11-30
WO2015172991A1 (fr) 2015-11-19
CA2948207A1 (fr) 2015-11-19
TW201613230A (en) 2016-04-01
DE102014209006A1 (de) 2015-11-19

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