WO2017174638A1 - Générateur à transfert magnétique - Google Patents

Générateur à transfert magnétique Download PDF

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Publication number
WO2017174638A1
WO2017174638A1 PCT/EP2017/058074 EP2017058074W WO2017174638A1 WO 2017174638 A1 WO2017174638 A1 WO 2017174638A1 EP 2017058074 W EP2017058074 W EP 2017058074W WO 2017174638 A1 WO2017174638 A1 WO 2017174638A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
modulator
generator
electric machine
machine according
Prior art date
Application number
PCT/EP2017/058074
Other languages
German (de)
English (en)
Inventor
Johannes BROMBACH
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 WO2017174638A1 publication Critical patent/WO2017174638A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/22—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators
    • H02K19/24—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators with variable-reluctance soft-iron rotors without winding
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator
    • H02K16/04—Machines with one rotor and two stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • H02K21/40—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with flux distributors rotating around the magnets and within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • H02K21/42—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with flux distributors rotating around the armatures and within the magnets
    • 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

Definitions

  • the present invention relates to an electric machine, in particular a generator with magnetic translation, and a wind turbine with such an electric machine as a generator for generating electrical power from wind.
  • Electrical machines are well known, they are usually designed as rotating electrical machines and have exactly one stator and exactly one rotor. Electrical machines are also designed as a motor for performing mechanical work or as a generator for generating electrical power and cover a wide range of applications. In certain applications, it may be necessary that the electrical machine must be adapted by means of a mechanical transmission to their application.
  • a mechanical transmission is used, which is arranged between the aerodynamic rotor, which is driven by the wind, and the rotor of the generator, that is arranged in the drive train of the wind turbine. In such an embodiment of a wind turbine with mechanical gear this is usually heavily stressed by changing loads, the translation from slow to high speeds is particularly problematic, and it can come to so-called. Cold Forging processes that damage the mechanical transmission such that it must be replaced. This in turn leads to a high maintenance of the wind turbine and can be very costly.
  • an electric machine according to claim 1 is proposed.
  • This electric machine comprises a first stator having a plurality of first stator poles, which form one or more first stator pole pairs, prepared for providing a fixed, circumferentially alternating magnetic field, a second stator having a plurality of second stator poles, which form one or more second stator pole pairs, for guiding a magnetic rotating field, with electrical windings for guiding an alternating electric current corresponding to the magnetic rotating field and a rotatably mounted between the first and second stator modulator, so that an interaction between the alternating magnetic field of the first stator, the magnetic rotating field of the second stator and a rotational movement of the modulator.
  • the electric machine has a modulator which is arranged so that it carries out a modulation of at least one magnetic field of a stator.
  • the modulator is formed in sections as a magnetically active body, for example of ferromagnetic materials such as iron.
  • the modulator of the electric machine thus forms the rotor of the electric machine.
  • the mode of action of the proposed electric machine is based on that of a magnetic gear.
  • the electric machine is also designed as a synchronous machine, in particular as a synchronous generator, so that an electrical, particularly at least three-phase, but preferably six-phase alternating current is generated by rotation of the modulator in the second stator whose frequency in a fixed ratio to the speed of Modulators stands.
  • the first stator is carried out externally excited, so that the alternating magnetic field is generated by at least one direct current.
  • the first stator thus has electromagnets that form the stator poles and are traversed by a direct current, so that they generate the magnetic field alternating in the circumferential direction. It is particularly proposed that each electromagnet is formed from a laminated core with a DC winding and the first stator has in routinesnchtung this Blechpakte, wherein alternated in typicallysnchtung the Wickelsinn the DC windings.
  • the electrical machine can thereby be easily controlled and regulated and that magnetic excitation of the first poles and thus of the first stator can be set during operation.
  • a regulation can be carried out.
  • no costly rare earths have to be used for the first stator, as would be the case, for example, with a permanent excitation of the stator.
  • the electric machine is especially adapted in terms of size, power, speed and current to a gearless wind turbine.
  • it is adapted to rotational speeds of the modulator in the range of 5 to 25 revolutions per minute (rpm).
  • the electric machine has an annular design, in which the two stators and the modulator are formed as a ring, so that no magnetically active elements are arranged in the interior, especially in the inner 50% of the total radius of the machine.
  • construction elements such as support struts.
  • the electrical machine is constructed so that the first stator, the second stator and the modulator are concentrically interlocked.
  • the electric machine is thus designed as a rotating electrical machine, wherein the modulator is arranged in the radial direction between the first and the second stator.
  • the electrical machine thus preferably has an inner and an outer stator, wherein the inner stator has a smaller average diameter than the outer stator.
  • the modulator is arranged, in particular as a middle modulator ring. It is particularly advantageous in this case that the electric machine can be carried out entirely without slip rings even with the third stator excited by the outside. In particular, this minimizes the maintenance of the electrical machine.
  • the electric machine has exactly one rotatably mounted modulator.
  • the electric machine thus consists in a preferred embodiment substantially of the first stator, the second stator and precisely the one rotatably mounted modulator, wherein the modulator can be regarded and referred to as a rotor of the electric machine.
  • the modulator can be regarded and referred to as a rotor of the electric machine.
  • Such an embodiment is made possible in particular by the externally excited embodiment of a stator and leads to a compact design of the electric machine, in particular due to the precisely one rotatably mounted modulator. It has been recognized that such an embodiment is particularly well suited for use as a low-speed machine, particularly for use in a gearless wind turbine.
  • the first stator is disposed radially inward with respect to the second stator, or the first stator is radially outward with respect to the second stator.
  • a third-excited stator is disposed inside, so it forms the inner stator.
  • the second stator which can be made thinner, is arranged on the outside, and thus the electric machine can be made smaller.
  • a third-excited stator is arranged on the outside, so it forms the outer stator.
  • the machine is constructed so that the modulator during operation of the electric machine has a rotational movement relative to the first stator, which generates a magnetic rotating field and thus a three-phase current in the second stator.
  • the modulator thus rotates relative to the first stator and thus relative to the circumferentially alternating magnetic field of the first stator.
  • the result is an interaction through which a time-varying magnetic field in the second stator adjusts, namely a rotating field, which generates the electrical rotary current by corresponding winding of the second stator.
  • the modulator has a plurality of modulator iron and the modulatory iron are designed unwound.
  • the modulator are formed of a ferromagnetic material and aligned in the axial direction of the modulator in the modulator and arranged so that they form at least one magnetic pole pair in the operation of the electric machine.
  • the modulator has at least one modulator iron more or less than pole pairs in the first stator and / or pole pairs in the second stator.
  • a magnetic field rotating rapidly in the first stator can be generated, which rotates faster than the modulator rotates.
  • an electrical current with a high frequency can be generated at a comparatively slow rotational speed of the modulator.
  • this variant can be used to generate a three-phase current, including a three-phase alternating current, from a slow rotational movement of the aerodynamic rotor with a sufficiently high frequency.
  • the modulator iron preferably forms a plurality of magnetic modulator pole pairs, which correspond to the sum of the stator pole pairs of the first and the second stator.
  • the number of modulator trips may also correspond to the difference between the number of pole pairs in the higher-pole stator and the number of pole pairs in the lower-pole stator.
  • the second stator has substantially fewer pole pairs than the first stator, in particular less than a quarter of the number of pole pairs of the second stator.
  • the first stator of the electric machine has 42 poles and thus 21 pole pairs and the second stator of the electric machine 4 poles and thus 2 pole pairs. The sum is then 46 poles or 23 pairs of poles and for the number of modulator trips thus 23 is proposed.
  • This number Modulatoreisen is accordingly to be arranged in the modulator.
  • a modulator iron which, for example, can also be made of a laminated material, forms a modulator pole pair in operation.
  • at least one stator of the electrical machine is designed to be highly poled.
  • preferably 12 pool pairs or more, in particular 24 or more pole pairs are provided, especially in the first stator.
  • the electric machine is preferably and in particular designed by at least one of the features described above to work in power classes over 100 kW.
  • such an electrical machine is designed to be used as a generator in a wind power plant, in particular in power classes over 1 MW.
  • the electric machine has an outer diameter that is greater than 3 m and less than 5 m.
  • the electric machine has an outer diameter that is greater than 3 m and less than 5 m.
  • the electric machine is preferably designed as a high-performance machine, in particular as a generator with a power class of more than 1 MW. Particularly advantageous here is the utilization of the compact design while sacrificing a mechanical transmission.
  • the electric machine according to the invention thus enables a low-maintenance machine, in particular a low-maintenance generator of a wind turbine, which manages without slip rings.
  • the electric machine is designed as a ring generator.
  • the electric machine is designed as a generator with magnetic translation, in particular as a 6-phase generator of a wind turbine, which can also be referred to as a magnetic gear generator.
  • a 6-phase generator or as a 6-phase system in general, in this case a generator is considered, which has two electrical see 3-phase systems, which are out of phase with each other.
  • an electrical machine according to one of the preceding embodiments as a generator, in particular so that the modulator is coupled to the mechanical drive shaft to generate electrical power from rotation of the generator.
  • the electric machine is designed as a 6-phase generator with a magnetic translation of a wind turbine, which has or requires a smaller space compared to conventional generators same functionality or the same application.
  • a wind energy plant for generating electrical power from wind is proposed.
  • the wind turbine comprises a wind-driven aerodynamic rotor with at least one rotor blade and one of the aerodynamic rotor.
  • the generator is an electrical machine described above or below, in particular used according to one of the embodiments described above and the modulator of the electric machine with the aerodynamic rotor is coupled so that a rotational movement of the aerodynamic rotor to one, in particular identical , Rotary movement of the modulator results, whereby a magnetic rotating field is generated in the second stator and the electric machine thereby generates an electric current and thus an electric power.
  • the first stator is rotatably mounted and the modulator is fixed, so that a physical rotation of the first stator via a modulation by means of the modulator leads to a rotating field in the second stator.
  • the wind turbine thus has an aerodynamic rotor which is coupled directly or via a drive train with the rotatably mounted modulator of the electric machine to generate electrical power.
  • the modulator of the electrical machine which is designed here as a generator or can be operated as a generator, is offset by means of the aerodynamic rotor in a rotational movement. Due to the rotational movement of the modulator, the magnetic field of the first stator in the second stator is modulated so that an electric current is induced in the second stator.
  • the aerodynamic rotor is coupled directly to the modulator so that there is a gear ratio of 1: 1 between the aerodynamic rotor and the modulator.
  • the wind turbine is thus executed here gearless.
  • the wind turbine therefore has no mechanical transmission between the aerodynamic rotor and modulator.
  • the generator may have a smaller design than previous generators gearless wind turbines, because the generator can be designed so that the rotation of the modulator without mechanical gear can lead to a faster rotating rotating field in the second stator.
  • the generator is designed as a synchronous generator of a gearless wind turbine.
  • the electric machine is designed as a ring generator of a wind turbine.
  • Fig. 1 shows a wind turbine in a perspective view.
  • Fig. 2 shows an embodiment of an electric machine, in particular as
  • Fig. 3 shows another embodiment of an electrical machine, in particular as a generator.
  • Fig. 4 shows a preferred embodiment of an electric machine as
  • Fig. 1 shows a wind turbine 100 for generating electrical power from wind with a tower 102 and a nacelle 104.
  • a rotor 106 with three rotor blades 108 and a spinner 1 10 is arranged on the nacelle 104.
  • the rotor 106 which is also referred to as aerodynamic rotor, is set in operation by the wind in a rotational movement and thereby drives a generator in the nacelle 104.
  • an electric machine according to the invention with two stators and a modulator is used, wherein the modulator the electric machine is coupled to the aerodynamic rotor so that the electric machine generates electrical power.
  • the generator is designed in the sense of a magnetic gear generator, in particular from an electric machine according to the invention as a 6-phase ring generator, wherein the wind turbine has no mechanical transmission between the aerodynamic rotor and generator.
  • FIG. 2 shows a preferred embodiment of an electrical machine according to the invention, which is designed as a generator 200.
  • the generator 200 comprises a first stator 210 with a plurality of first stator poles 212, prepared for providing a fixed magnetic field alternating in the circumferential direction U, a second stator 220 with a plurality of second stator poles 222 for conducting an alternating magnetic field, with electrical windings U, V, W, X, Y, Z for guiding one to the rotating electric field corresponding alternating current, and a rotatably mounted between the first and second stator 210, 220 modulator 230, so that an interaction between the alternating magnetic field of the first stator 210, the magnetic rotating field of the second stator 220 and a rotational movement of the modulator 230.
  • the first stator 210, the second stator 220 and the modulator 230 are concentric with each other and thereby form a rotary electric machine, wherein the electric machine has exactly one rotatably mounted modulator 230.
  • the first stator 210 is disposed radially inward with respect to the second stator 220.
  • a rotational movement of the modulator 230 relative to the first stator 210 generates the magnetic see field and thus the electrical three-phase current of the second stator 220, which is formed in six phases.
  • the thus generated 6-phase current is passed through the phases U, V, W, X, Y, Z to a rectifier 240, which generates a DC voltage or a direct current, which is converted by means of an inverter 250 into a three-phase current and then in a supply network 260 is fed.
  • the first stator 210 is designed to be externally excited, so that the alternating magnetic field is generated by at least one direct current.
  • This DC current which can be referred to as excitation current, is taken from the DC intermediate circuit 245 and provided by means of a drive unit 270 on the first stator for a foreign excitation, as this embodiment shows. But it is also contemplated to generate the excitation current elsewhere, such as.
  • the modulator 230 further includes a plurality of modulator wires 232, the modulator wires 232 being unwound.
  • the modulator 230 is designed to be magnetically effective at least in sections, ie separately for each pole 232, preferably made of iron.
  • the first stator 210 has forty-two fixed externally-excited magnetic poles as stator poles 212, whose magnetic field is modulated by a modulator 230 with twenty-three modulator ironless windings, whereby in the modulator iron, pole pairs are temporarily transformed by the interaction of the modulator with the first Dynamically train stator.
  • the second stator 220 is in this case four-pole (two pole pairs) executed.
  • the first stator pole pair number is thus greater than the second stator pole pair number and the first stator 210 is designed to be high-pole.
  • This electric machine is thus prepared for large power classes at low speed of the modulator.
  • FIG. 3 shows a further embodiment of an electrical machine according to the invention, which is designed as a generator 300.
  • the generator 300 comprises a first stator 310 with a plurality of first stator poles 312, prepared for providing a fixed, alternating magnetic field in the circumferential direction U, a second stator 320 with a plurality of second stator poles 322 for conducting an alternating magnetic field, with electrical windings U, V, W, X, Y, Z for guiding an alternating current corresponding to the rotary electric field, and a modulator 330 rotatably mounted between the first and second stator 310, 320, so that an interaction exists between the alternating magnetic field of the first stator 310, the magnetic rotary field of the second stator 320 and a rotational movement of the modulator 330.
  • the first stator 310, the second stator 320 and the modulator 330 are concentric with one another and thereby form a rotating electrical machine, wherein the electric machine has exactly one rotatably mounted modulator 330.
  • the first stator 310 is disposed radially outward with respect to the second stator 320.
  • a rotational movement of the modulator 330 relative to the first stator 310 generates the magnetic rotating field and thus the magnetically induced three-phase current of the second stator 320, which is formed in a 6-phase manner.
  • the thus generated 6-phase current is transferred via the phases U, V, W, X, Y, Z to a rectifier 340, which generates a direct current, which is fed by means of an inverter 350 into a supply network 360.
  • the first stator 310 is carried out externally excited, so that the alternating magnetic field is generated by at least one direct current, as this embodiment shows.
  • This excitation current is taken from the DC intermediate circuit 345 and provided by means of a drive unit 370 on the first stator for a foreign excitation.
  • the modulator 330 further includes a plurality of modulator leads 332 with the modulator leads 330 unwound.
  • the modulator 330 is executed at least partially magnetically effective, ie for each pole 332 separately, for example made of iron.
  • the first stator 310 is designed with four poles (two pole pairs) with fixed, externally excited windings.
  • the modulator 330 is configured with twenty-three modulator wires without winding and the second stator 320 is formed as a fixed stator with a 42-pole three-phase winding (21 pole pairs).
  • the second Statorpolcontractiere is thus greater than the first Statorpolcruress.
  • 4 shows a preferred embodiment of an electric machine as a generator in a wind energy plant 400.
  • the wind energy plant comprises a tower 402 and a nacelle 404 (indicated), which is arranged above the tower 402.
  • a rotor 406 On the nacelle 404 is a rotor 406 with three rotor blades 408, one of which is indicated by dashed lines.
  • the rotor 406 which is also referred to as an aerodynamic rotor, is set in motion by the wind in a rotational movement d and thereby drives the generator 409 in the nacelle 404 at.
  • an electrical machine according to the invention is used which comprises a first stator 410, a second stator 420 and a modulator 430.
  • the modulator 430 of the generator is coupled to the aerodynamic rotor 406 so that the generator, which is implemented as a ring generator, generates electrical power.
  • the generator 409 of the wind turbine can thus be designed in the sense of a generator with magnetic translation, in particular as a 6-phase ring generator.
  • the modulator 430 is coupled directly to the aerodynamic rotor 406 and rotatably supported in the stator support 414. Further support is also achieved by bearings 434 supporting the modulator 430 together with the rotor 406.
  • the stator supports 414, 424 respectively support the first and second stator directly on the axle journal 480 of the machine frame 490, with the machine frame 490 supported and supported on the tower 402.
  • the wind energy plant is thus designed without mechanical gear between aerodynamic rotor 406 and generator 409.
  • the drive train of the wind turbine is thus designed mechanically gearless or the gear ratio between the aerodynamic rotor and the generator, namely the modulator, is 1: 1.
  • the outer diameter of the generator 409 is greater than 3 m and less than 5 m.
  • Particularly advantageous in an inventive use of an electrical machine according to the invention in a wind turbine is the compact design of the electric machine.
  • a regulation of the voltage output of the generator of the wind turbine via the external excitation is made possible.
  • the operating point of the generator can also be adjusted and regulated via the excitation.
  • Another advantage of this generator concept is a simple way of setting the transmission ratio in the interpretation of the rotation of the modulator to the speed of the generated alternating rotating field by varying the modulator. Also, such a construction allows a smaller air gap as well a modular construction of the generator. In addition, slip rings are no longer needed and a higher efficiency of the generator can be achieved.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Wind Motors (AREA)

Abstract

La présente invention concerne une machine électrique, en particulier un générateur à transfert magnétique, ainsi qu'une éolienne équipée d'une telle machine électrique comme générateur pour générer de l'énergie électrique à partir du vent. Selon l'invention, il est proposé une machine électrique selon la revendication 1. Cette machine électrique comprend un premier stator muni d'une pluralité de premiers pôles de stator qui forment une ou plusieurs premières paires de pôles de stator adaptées pour produire un champ magnétique alternatif fixe dans la direction périphérique, un second stator muni d'une pluralité de deuxièmes pôles de stator, qui forment une ou plusieurs deuxièmes paires de pôles de stator, pour guider un champ magnétique tournant, et d'enroulements électriques destinés à guider un courant électrique alternatif correspondant au champ magnétique tournant, et un modulateur monté de manière à pouvoir tourner entre les premier et second stator de façon à avoir une interaction entre le champ magnétique alternatif du premier stator, le champ magnétique tournant du second stator et un mouvement de rotation du modulateur.
PCT/EP2017/058074 2016-04-05 2017-04-05 Générateur à transfert magnétique WO2017174638A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016106187.5 2016-04-05
DE102016106187.5A DE102016106187A1 (de) 2016-04-05 2016-04-05 Generator mit magnetischer Übersetzung

Publications (1)

Publication Number Publication Date
WO2017174638A1 true WO2017174638A1 (fr) 2017-10-12

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WO (1) WO2017174638A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3512081A1 (fr) * 2018-01-16 2019-07-17 Siemens Aktiengesellschaft Machine électrique rotative

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1458080A1 (fr) * 2001-12-20 2004-09-15 Mitsubishi Denki Kabushiki Kaisha Machine dynamoelectrique du type a aimants permanents et generateur synchrone du type a aimants permanents utilisant l'energie eolienne
US20070186692A1 (en) * 2006-02-14 2007-08-16 Michal-Wolfgang Waszak Electric machine apparatus with integrated, high torque density magnetic gearing
CN102141008A (zh) 2011-02-24 2011-08-03 中科盛创（青岛）电气有限公司 同心式双定子结构的直驱实心转子异步风力发电机***
US20110285132A1 (en) 2010-12-16 2011-11-24 Michal-Wolfgang Waszak Variable speed machine assembly and method for making the same
EP2608370A2 (fr) * 2011-12-24 2013-06-26 Robert Bosch Gmbh Machine électrique pour une éolienne
EP2770616A1 (fr) * 2013-02-25 2014-08-27 Siemens Aktiengesellschaft Machine électrique avec stator séparé

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1458080A1 (fr) * 2001-12-20 2004-09-15 Mitsubishi Denki Kabushiki Kaisha Machine dynamoelectrique du type a aimants permanents et generateur synchrone du type a aimants permanents utilisant l'energie eolienne
US20070186692A1 (en) * 2006-02-14 2007-08-16 Michal-Wolfgang Waszak Electric machine apparatus with integrated, high torque density magnetic gearing
US20110285132A1 (en) 2010-12-16 2011-11-24 Michal-Wolfgang Waszak Variable speed machine assembly and method for making the same
CN102141008A (zh) 2011-02-24 2011-08-03 中科盛创（青岛）电气有限公司 同心式双定子结构的直驱实心转子异步风力发电机***
EP2608370A2 (fr) * 2011-12-24 2013-06-26 Robert Bosch Gmbh Machine électrique pour une éolienne
EP2770616A1 (fr) * 2013-02-25 2014-08-27 Siemens Aktiengesellschaft Machine électrique avec stator séparé
WO2014127855A1 (fr) 2013-02-25 2014-08-28 Siemens Aktiengesellschaft Moteur électrique pourvu d'un stator divisé

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