SE444599B - Regleringsanordning for vindturbindriven generator i ett elproducerande vindkraftverk - Google Patents
Regleringsanordning for vindturbindriven generator i ett elproducerande vindkraftverkInfo
- Publication number
- SE444599B SE444599B SE7905005A SE7905005A SE444599B SE 444599 B SE444599 B SE 444599B SE 7905005 A SE7905005 A SE 7905005A SE 7905005 A SE7905005 A SE 7905005A SE 444599 B SE444599 B SE 444599B
- Authority
- SE
- Sweden
- Prior art keywords
- signal
- control
- speed
- blade angle
- rotor
- Prior art date
Links
- 230000001105 regulatory effect Effects 0.000 title claims description 9
- 230000001360 synchronised effect Effects 0.000 claims description 55
- 230000006870 function Effects 0.000 claims description 44
- 230000001133 acceleration Effects 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 15
- 238000010586 diagram Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 8
- 230000004044 response Effects 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 230000003750 conditioning effect Effects 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
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- 230000000694 effects Effects 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000454 anti-cipatory effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
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- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- 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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
- F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
- F03D7/044—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic with PID control
-
- 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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
-
- 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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0276—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
-
- 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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
- F03D7/043—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic
- F03D7/046—Automatic control; Regulation by means of an electrical or electronic controller characterised by the type of control logic with learning or adaptive control, e.g. self-tuning, fuzzy logic or neural network
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
- F05B2220/7064—Application in combination with an electrical generator of the alternating current (A.C.) type
- F05B2220/70642—Application in combination with an electrical generator of the alternating current (A.C.) type of the synchronous type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/101—Purpose of the control system to control rotational speed (n)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/102—Purpose of the control system to control acceleration (u)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/103—Purpose of the control system to affect the output of the engine
- F05B2270/1033—Power (if explicitly mentioned)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/109—Purpose of the control system to prolong engine life
- F05B2270/1095—Purpose of the control system to prolong engine life by limiting mechanical stresses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/32—Wind speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/327—Rotor or generator speeds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/328—Blade pitch angle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/70—Type of control algorithm
- F05B2270/706—Type of control algorithm proportional-integral-differential
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Artificial Intelligence (AREA)
- Fluid Mechanics (AREA)
- Evolutionary Computation (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Software Systems (AREA)
- Wind Motors (AREA)
- Control Of Eletrric Generators (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/916,329 US4189648A (en) | 1978-06-15 | 1978-06-15 | Wind turbine generator acceleration control |
| US05/916,321 US4160170A (en) | 1978-06-15 | 1978-06-15 | Wind turbine generator pitch control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7905005L SE7905005L (sv) | 1979-12-16 |
| SE444599B true SE444599B (sv) | 1986-04-21 |
Family
ID=27129689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7905005A SE444599B (sv) | 1978-06-15 | 1979-06-08 | Regleringsanordning for vindturbindriven generator i ett elproducerande vindkraftverk |
Country Status (5)
| Country | Link |
|---|---|
| DE (1) | DE2922972C2 (OSRAM) |
| DK (1) | DK243579A (OSRAM) |
| FR (1) | FR2428749A1 (OSRAM) |
| GB (1) | GB2023237B (OSRAM) |
| SE (1) | SE444599B (OSRAM) |
Families Citing this family (41)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2473639A1 (fr) | 1980-01-16 | 1981-07-17 | Aeropower | Aerogenerateur a axe d'orientation commande |
| FR2496773A2 (fr) * | 1980-12-24 | 1982-06-25 | Aeropower | Aerogenerateur a axe d'orientation commande |
| DE3167241D1 (en) * | 1980-01-16 | 1985-01-03 | Aeropower | Wind turbine with an adjustably orientable rotor axis |
| US4339666A (en) * | 1980-12-24 | 1982-07-13 | United Technologies Corporation | Blade pitch angle control for a wind turbine generator |
| DE19758857B4 (de) * | 1997-07-25 | 2013-08-08 | Aloys Wobben | Windenergieanlage |
| DE19731918B4 (de) * | 1997-07-25 | 2005-12-22 | Wobben, Aloys, Dipl.-Ing. | Windenergieanlage |
| DE19832207A1 (de) * | 1998-07-17 | 2000-01-27 | Rolf Hoffmann | Verfahren zur Bestimmung der Windgeschwindigkeit |
| GB2364401B (en) | 2000-07-06 | 2004-07-14 | Turbo Genset Company Ltd The | Distributed control method |
| US6921985B2 (en) | 2003-01-24 | 2005-07-26 | General Electric Company | Low voltage ride through for wind turbine generators |
| DE10323785B4 (de) * | 2003-05-23 | 2009-09-10 | Wobben, Aloys, Dipl.-Ing. | Verfahren zum Erkennen eines Eisansatzes an Rotorblättern |
| DE10361443B4 (de) * | 2003-12-23 | 2005-11-10 | Voith Turbo Gmbh & Co. Kg | Regelung für eine Windkraftanlage mit hydrodynamischem Getriebe |
| DK175892B1 (da) | 2004-03-17 | 2005-05-30 | Arne Johansen | Fremgangsmåde til styring af en vindmölle, navnlig i ö-drift, og en vindmölle |
| AT504818A1 (de) | 2004-07-30 | 2008-08-15 | Windtec Consulting Gmbh | Triebstrang einer windkraftanlage |
| DE102005029000B4 (de) | 2005-06-21 | 2007-04-12 | Repower Systems Ag | Verfahren und System zur Regelung der Drehzahl eines Rotors einer Windenergieanlage |
| DE102006007919B4 (de) * | 2006-02-21 | 2008-01-24 | Nordex Energy Gmbh | Verfahren zum Betreiben einer Windenergieanlage |
| ES2301400B1 (es) * | 2006-11-17 | 2009-05-01 | GAMESA INNOVATION & TECHNOLOGY S.L. | Metodo de reduccion de cargas en un aerogenerador. |
| US7883317B2 (en) | 2007-02-02 | 2011-02-08 | General Electric Company | Method for optimizing the operation of a wind turbine |
| WO2009033484A2 (en) * | 2007-09-13 | 2009-03-19 | Vestas Wind Systems A/S | A method of controlling a wind turbine, a wind turbine and use of a method |
| ES2723877T3 (es) * | 2007-11-15 | 2019-09-03 | Siemens Gamesa Renewable Energy Innovation & Technology SL | Método y sistema para el funcionamiento de un aerogenerador |
| DK2235367T3 (en) * | 2007-12-21 | 2016-06-27 | 2-B Energy Holding B V | Wind farm |
| DE102008007519A1 (de) * | 2008-02-05 | 2009-08-13 | Nordex Energy Gmbh | Vorrichtung zur Überwachung der Drehzahl bei einer Windenergieanlage |
| DE102008010466A1 (de) * | 2008-02-21 | 2009-09-03 | Nordex Energy Gmbh | Windenergieanlage mit Blatteinstellwinkelregler |
| DE102008011139A1 (de) | 2008-02-26 | 2009-08-27 | Nordex Energy Gmbh | Regler für einen Blatteinstellwinkel mindestens eines Rotorblatts einer Windenergieanlage |
| EP2263004B1 (en) | 2008-03-07 | 2017-08-23 | Vestas Wind Systems A/S | A control system and a method for redundant control of a wind turbine |
| DE102008044652A1 (de) | 2008-08-27 | 2010-03-04 | Nordex Energy Gmbh | Verfahren zum Betreiben einer Windenergieanlage mit einer Windgeschwindigkeitsmesseinrichtung |
| EP2333330B1 (de) | 2009-12-10 | 2017-01-18 | Centa-Antriebe Kirschey GmbH | Windturbine mit Kupplung mit Überlasteinheit und Verfahren |
| US8489246B2 (en) | 2010-02-26 | 2013-07-16 | Pratt & Whitney Canada Corp. | Hybrid control system |
| EP2386751B1 (en) | 2010-05-12 | 2016-08-17 | Siemens Aktiengesellschaft | Wind turbine |
| DE102010044433A1 (de) * | 2010-09-06 | 2012-03-08 | Nordex Energy Gmbh | Verfahren zur Drehzahlregelung einer Windenergieanlage |
| US8344550B2 (en) | 2010-12-21 | 2013-01-01 | General Electric Company | Power conversion control with energy storage |
| EP2481917A1 (en) * | 2011-01-26 | 2012-08-01 | Chapdrive As | A wind turbine with hydrostatic transmission and lvrt control |
| EP2481915A1 (en) | 2011-01-26 | 2012-08-01 | Chapdrive As | A method and system for connecting a wind turbine system to an electric grid |
| EP2514926B1 (en) * | 2011-04-17 | 2018-07-04 | Pratt & Whitney Canada Corp. | Hybrid control system |
| EP2784303B1 (en) | 2013-03-27 | 2016-11-02 | Alstom Renovables España, S.L. | Method of operating a wind turbine |
| DK2818698T3 (da) * | 2013-06-28 | 2017-11-20 | Alstom Renovables Espana Sl | Fremgangsmåder til at drive en vindmølle |
| CN108223268B (zh) * | 2016-12-14 | 2019-07-23 | 北京金风科创风电设备有限公司 | 风力发电机组的转速控制方法和装置 |
| CN107630785B (zh) * | 2017-09-11 | 2019-04-02 | 大连国通电气有限公司 | 一种多种工况下的风电机组保护控制系统 |
| CN113048009B (zh) * | 2019-12-27 | 2022-11-29 | 新疆金风科技股份有限公司 | 风力发电机组的变桨控制方法、装置及系统 |
| CN113217277B (zh) * | 2021-05-13 | 2022-03-15 | 中国华能集团清洁能源技术研究院有限公司 | 一种风力发电机组变桨执行跟踪监督控制系统及方法 |
| CN117329074B (zh) * | 2023-10-16 | 2025-10-17 | 明阳智慧能源集团股份公司 | 一种基于变桨电机扭矩的风机防超速控制方法及系统 |
| CN118653961B (zh) * | 2024-08-15 | 2024-12-10 | 清新能源科技张家口有限公司 | 风力发电机的控制方法、装置、终端及存储介质 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2363850A (en) * | 1941-11-22 | 1944-11-28 | Gen Electric | Control equipment for prime mover electric generating plants |
| US2547636A (en) * | 1946-12-11 | 1951-04-03 | Fumagalli Charles | Windmill electric generating and storage system, including controlling means |
| US2583369A (en) * | 1948-05-21 | 1952-01-22 | Fumagalli Charles | Wind-driven turbine or propeller with electric generator and control devices |
| US2795285A (en) * | 1953-07-29 | 1957-06-11 | Westinghouse Electric Corp | Electrical control apparatus for variable pitch propellers |
| US2832895A (en) * | 1956-01-31 | 1958-04-29 | Allgaier Werke Gmbh | Control apparatus for wind motors |
| US3639076A (en) * | 1970-05-28 | 1972-02-01 | Gen Electric | Constant power control system for gas turbine |
| US3932058A (en) * | 1974-06-07 | 1976-01-13 | United Technologies Corporation | Control system for variable pitch fan propulsor |
| FR2313576A1 (fr) * | 1975-06-06 | 1976-12-31 | Buys Victor | Machine eolienne a vitesse de rotation constante |
-
1979
- 1979-06-06 DE DE2922972A patent/DE2922972C2/de not_active Expired
- 1979-06-08 SE SE7905005A patent/SE444599B/sv not_active IP Right Cessation
- 1979-06-11 DK DK243579A patent/DK243579A/da not_active Application Discontinuation
- 1979-06-13 FR FR7915179A patent/FR2428749A1/fr active Granted
- 1979-06-15 GB GB7920852A patent/GB2023237B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2922972A1 (de) | 1980-01-03 |
| GB2023237B (en) | 1982-01-06 |
| DE2922972C2 (de) | 1986-11-13 |
| FR2428749A1 (fr) | 1980-01-11 |
| DK243579A (da) | 1979-12-16 |
| GB2023237A (en) | 1979-12-28 |
| FR2428749B1 (OSRAM) | 1984-10-19 |
| SE7905005L (sv) | 1979-12-16 |
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