WO2003019005A1 - A wind turbine and rotor assembly - Google Patents
A wind turbine and rotor assembly Download PDFInfo
- Publication number
- WO2003019005A1 WO2003019005A1 PCT/NZ2002/000165 NZ0200165W WO03019005A1 WO 2003019005 A1 WO2003019005 A1 WO 2003019005A1 NZ 0200165 W NZ0200165 W NZ 0200165W WO 03019005 A1 WO03019005 A1 WO 03019005A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- wind turbine
- generator
- blade
- degrees
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims abstract description 20
- 238000010168 coupling process Methods 0.000 claims abstract description 20
- 238000005859 coupling reaction Methods 0.000 claims abstract description 20
- 238000013461 design Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 5
- 238000011068 loading method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 201000009482 yaws Diseases 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004804 winding Methods 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
- F03D7/022—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
- F03D7/0272—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor by measures acting on the 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
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/202—Rotors with adjustable area of intercepted fluid
- F05B2240/2022—Rotors with adjustable area of intercepted fluid by means of teetering or coning blades
-
- 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
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/21—Rotors for wind turbines
- F05B2240/221—Rotors for wind turbines with horizontal axis
- F05B2240/2213—Rotors for wind turbines with horizontal axis and with the rotor downwind from the yaw pivot axis
-
- 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
- F05B2260/00—Function
- F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
- F05B2260/77—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism driven or triggered by centrifugal forces
-
- 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
Definitions
- the present invention relates to a wind turbine and a rotor assembly.
- Conventional horizontal axis wind turbines have one or more rotor blades which rotate about an axis substantially parallel to the wind direction.
- the turbine is typically connected to a mast via a yaw bearing and the turbine is rotatable about the mast so that it may be oriented correctly with respect to the wind direction.
- a fin or like structure is provided downwind to ensure that the rotors are upwind of the mast.
- a primary design goal in designing a wind turbine is to maximise economic performance in the conversion of wind energy to extracted power.
- a common horizontal axis wind turbine design utilises a pair of opposed rotor blades which maintain a fixed relationship to the axis of rotation. Whilst this design is relatively simple to implement the design is subject to changes in yaw axis rotational inertia as the spinning rotor blades move about the yaw axis. Horizontal axis wind turbines with three or more blades behave better when yawing, as the yaw axis rotational inertia does not change significantly as the spinning rotor moves around the yaw axis.
- Wind turbines having a single rotor blade and a single opposing counter weight have been used.
- the rotor blade is disposed at a substantially fixed angle with respect to the drive shaft.
- This design suffers from changes in yaw axis rotational inertia as the spinning rotor moves around the yaw axis.
- the rotor blade is also exposed to high loadings in high winds and it can be difficult to dynamically balance generator load with turbine output.
- Rotor blades may be feathered to match the aerodynamic lift generated by the rotors to the generator load. It can be difficult to dynamically adjust feathering, especially during wind gusts, and the support structure may still be subject to considerable wind loading during gusts. The load applied to the generator may also be adjusted.
- US4,517,467 discloses a single rotor blade wind turbine utilising a single counter weight. Blade pitch control is utilised to feather the rotor blade to match rotor output with generator requirements.
- the rotor blade is swingable over a narrow angular range so that a blade can be kept substantially perpendicular to wind directions deviating slightly from the horizontal. Blade feathering is the technique used for load balancing.
- a wind turbine including: . a generator; a rotor coupled to the generator; and a plurality of weights distributed about the axis of rotation of the rotor to balance centripetal forces generated by the rotor in use.
- weights are provided disposed about 120 degrees apart from each other and the rotor.
- the rotor is preferably tiltable between 0 to about 90 degrees.
- Control means are preferably provided to control the load applied to the generator to balance centripetal forces and lift and drag generated by the rotor.
- a wind turbine including: a generator; a rotor coupled to the generator via a drive coupling wherein the rotor is tiltable with respect to the drive coupling over a sufficient range to match the power supplied by the rotor to the torque required by the generator.
- Each rotor is preferably tiltable by in excess of 30 degrees and preferably between 0 to about 90 degrees.
- a single rotor is employed having multiple opposed counterweights disposed at about 120 degrees apart from each other and the rotor.
- Control means are preferably provided to control the load applied to the generator to balance centripetal forces and lift and drag generated by the rotor.
- Adjustable control surfaces such as ailerons, blade spoilers, flaps, pitch changing blades or dampers, may be employed to maintain a desired degree of teeter of the blade.
- a wind turbine including:
- a generator one or more rotor coupled to the generator via a drive coupling wherein each rotor is tiltable with respect to the drive coupling; and control means for varying, in use, the load applied to the generator so as to adjust the balance between centripetal force and lift and drag for each rotor to adjust the angle of tilt of each rotor.
- the control means preferably controls the load applied to the generator to match the power output of the one or more rotor to the power requirements of the generator.
- the control means preferably maintain the angle of tilt of the rotor at a normal optimum value up to the maximum allowed generator shaft speed.
- the control means preferably controls the load applied to the generator to maintain substantially constant generator shaft speed when maximum generator shaft speed has been attained.
- Each rotor is preferably tiltable in excess of 30 degrees, more preferably in excess of 60° and more preferably between 0 to about 90 degrees.
- a single rotor having multiple counterweights disposed at about 120 degrees spacing is preferably employed.
- the control means preferably controls the load applied to the generator to balance centripetal forces and lift and drag generated by the rotor.
- a rotor assembly comprising; a rotor; and a plurality of weights connected to the rotor and distributed about an axis of rotation of the rotor assembly to balance centripetal forces of the rotor and the weights.
- the rotor is preferably provided downwind of the generator.
- the generator may be a pump, electrical generator or the like. Where an electrical generator is employed, a permanent magnet generator is preferably utilised and directly driven by the rotor.
- Figure 1 shows a side view of a wind turbine according to one embodiment of the present invention.
- Figure 2 shows a cross sectional view (along the line B-B) of the rotor and counterweights of the wind turbine shown in Figure 1.
- Figure 3 shows a rear view of the wind turbine of Figures 1 and 2.
- Figure 4 shows a cross sectional view through line C-C of the wind turbine shown in Figure 1.
- Figure 5 shows a front view of the wind turbine shown in Figures 1-4.
- Figure 6 is a side cross sectional view along line A-A shown in Figure 5.
- Figure 7 shows the range of tilt of the blade of the wind turbine of figures 1 to 6.
- Figure 8 is a block diagram of an electrical generator and its associated control means.
- Figure 9 shows a blade having a spoiler mounted upon it.
- Figure 10 shows a blade having an aileron.
- Figure 11 shows a blade having a damper.
- Wind turbine 1 is rotatably mounted about mast 2.
- the turbine housing 3 consists of an airfoil section 4 and a generally conical section 5.
- a drive coupling in the form of drive shaft 7 is directly connected from generator 6 to rotor blade 8.
- the generator is a permanent magnet generator, it will appreciated that other of types of generators could be employed in conjunction with suitable gearing.
- the generator could be a fluid pump or other like device for utilising the torque generated by the rotor.
- a direct drive permanent magnet generator is particularly preferred as it may be designed to operate over a desired range of rotational shaft speeds without requiring gearing.
- Rotor blade 8 has a pair of counterweights 9 and 10 attached thereto via shafts 11 and 12.
- the centre line of rotor blade 8 and the centre lines of shafts 11 and 12 are preferably displaced from each other by about 120 degrees in the plane of rotation of the rotor blade.
- Counterweights 9 and 10 are preferably displaced from each other by about 120 degrees in the plane of rotation of the rotor blade.
- Teeter bearing 13 permits rotor blade 8 to tilt with respect to shaft 7 over a range of angles (preferably from about 0 degrees to about 90 degrees) with respect to vertical as illustrated in figure 7.
- the rotor blade 8 is tilted by 90° it is horizontal and is exposed to minimum wind loading.
- Cowling 14 is provided with a slot 15 to accommodate the teetering movement of the rotor blade 8 and slots 16 to accommodate the teetering moving of shafts 11 and 12.
- wind turbine 1 In use wind turbine 1 is rotatable about mast 2 and so rotor blade 8 automatically orientates to a downwind position. If a low load is applied to generator 6 rotor blade 8 rotates relatively freely. The rotation of rotor blade 8 gives rise to centripetal forces tending to force rotor blade 8 outwardly. The aerodynamic force generated by rotor blade 8 in a wind stream tends to force rotor blade 8 away from mast 2.
- Rotor blade 8 and weights 9 and 10 lie in a common plane and so as blade 8 is forced away from mast 2 rotor blade 8 adopts a conical pattern of rotation. As the path of rotation of blade 8 becomes increasingly coned, less wind force from the wind stream is captured by rotor blade 8.
- centripetal force and aerodynamic lift and drag generated by blade 8 a desired degree of rotor blade coning may be achieved.
- this balance between centripetal force and aerodynamic lift and drag may be achieved by adjusting the load applied to generator 6.
- rotor blade 8 When a low load is applied, rotor blade 8 will describe a relatively flat conical path. As the load applied by generator 6 increases the path described by rotor blade 8 will become increasingly coned. The increased load decreases the speed of rotation of rotor blade
- Control of the rate of change of the blade coning angle is preferably maintained by the aerodynamic damping of the blade associated with the rate of change of the cone angle. Additional damping may be introduced to maintain smooth running of the blade at the desired cone angle by any of the following devices, singly or in combination: blade damper, aileron, flap, spoiler, blade pitch change mechanism.
- Figure 9 shows a blade 20 having a spoiler 21 mounted on its surface.
- Figure 10 shows a blade 22 having an aileron 23 which may be adjusted via suitable control means.
- Figure 11 shows a blade 24 having a damper 25.
- Generator 6 is preferably a permanent magnet generator. This enables the number of poles to be matched to the operating shaft rotational speeds of the wind turbine to achieve a desired match. Directly driving generator 6 avoids losses incurred in gearing arrangements.
- Generator 6 will typically be utilised to charge storage batteries (or other power sink: AC power system, resistance heater, hydrogen generator, flywheel energy storage device etc.).
- the control means may adjust the load applied to generator 6 so that it generates the optimum power for the given wind conditions.
- the variable load applied to the generator may be matched to the turbine output until the rated maximum shaft rotational speed is reached. From this point, the rotor blade may be flown by controlling the external load to stall and cone the rotor blade to limit the torque delivered.
- the machine may be shut down and the rotor blade may be parked near its maximum coned position to minimise the static aerodynamic force on the wind turbine and mast. Parking the rotor blade may be achieved by shorting the windings of the generator then braking the rotor at a desired position. The blade may then simply pivot about the teeter bearing. The parked blade may be locked at the maximum cone angle in high winds.
- FIG. 8 shows a schematic diagram of a possible control means for connection between the generator and a power system.
- Controller 30 is connected to an interface 33 which receives user input and displays status information. The user may set operational parameters and control strategies etc via interface 33. Controller 30 may interface to external apparatus to provide information will receive control commands via external communications unit 34.
- Controller 30 receives information from angle sensor 31 as to the degree of tilt of blade 8 and information from frequency shaping unit 32 as the angular velocity of the rotor. Controller 30 also receives information from current sensor 38 as to the output power from generator 6.
- Generator 6, in this case an alternator, may deliver power to either dump load 39 or output 40.
- Dump load control 35 is controlled by controller 30 to connect the output of alternator 6 to dump load 39.
- Dump load 39 may be a hot water heater or other load.
- Voltage control/rectifier 36 is controlled by controller 30 to connect the output of alternator 6 to output 40.
- Output 40 may supply storage batteries, an electricity network etc.
- Starting circuit 37 is controlled by controller 30 to supply a pulse width modulated voltage waveform to alternator 6 to effect starting in low wind conditions.
- An external electrical supply 41 is utilised to effect starting.
- the external supply 41 also supplies power to controller 30.
- External supply 41 may be storage batteries or an electrical network.
- the rotor teeter angle sensor 30 is used to measure the rotor teeter angle, which can be used by controller 30 to infer the wind speed.
- the rotor blade 8 is provided with some stiffness in rotation about the teeter bearing to cause the blade to rest in a vertical plane at zero wind speed.
- controller 30 may start the windmill from external supply 41 using starting circuit 37.
- controller 30 may disconnect the starting circuit and allow the rotor to accelerate to the optimum rotational speed for the wind speed. This is again inferred from the teeter angle. There is a relationship between the lift and drag on the blade, the wind speed, the rotational speed and the centripetal reactions on the blade and counterweight masses that resolves the teeter angle for the optimum blade running condition.
- the controller may increase or reduce the electrical load on the alternator using the teeter angle as the controlled variable. Up to the rated output of the turbine, the rotational speed at which the optimum teeter angle is achieved can be used to determine the wind speed.
- the controller will act to limit the increase of rotor angular velocity.
- the increasing aerodynamic lift and drag on the blade as the wind velocity increases and the airfoil angle of attack increases will cause the teeter angle to increase from the optimum which progressively reduces the projected swept area of the blade rotor.
- the controller continues to set the rotor rotational speed to achieve a predetermined teeter angle (these may be derived from testing using a parameter mapping process) and keep the alternator within its rated power.
- the blade progressively stalls from the hub towards the tip with increasing section angles of attack until stable running of the coned rotor is no longer possible, and the controller shuts the turbine down to await less extreme wind conditions.
- the controller will continue to monitor wind strength, and may restart the turbine if wind conditions abate.
- Control strategies may also be employed which are dependent upon the stress to which the turbine is exposed.
- the controller may determine the wind velocity and degree of gustiness from the angular velocity and blade angle and the variations and rates of variation of these parameters. An estimate of the stress state in the blade may be calculated from these parameters at all times while running.
- the controller may apply different control strategies for the turbine for different sets of conditions. For example, in a situation where the primary energy store (e.g. a battery) is not fully charged the controller may adopt an energy capture maximisation approach, where it continues running at relatively high stress.
- the primary energy store e.g. a battery
- the machine may be programmed to change to a life maximisation strategy where it shuts down and waits for less gusty or lower velocity conditions before restarting.
- a measure of damage for the machine may be obtained based on historical measurements of these parameters. This may be used for scheduling inspection once a safe percentage of the design fatigue life is used.
- the wind turbine of the invention provides a design that automatically adjusts the configuration of the rotor to match power demand of the generator. Excess wind may be spilled by automatic adjustment of the degree of coning of the blade.
- the use of the single blade enables higher rotational blade speeds to be employed, providing better matching between the generator and rotor blade.
- Use of a single blade also allows the blade chord to be increased, benefiting the airfoil Reynolds number.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ531341A NZ531341A (en) | 2001-08-24 | 2002-08-23 | A wind turbine and single rotor able to be tilted to enable power and torque supply and demand matching |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NZ513769 | 2001-08-24 | ||
NZ513769A NZ513769A (en) | 2001-08-24 | 2001-08-24 | A wind turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003019005A1 true WO2003019005A1 (en) | 2003-03-06 |
Family
ID=19928632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NZ2002/000165 WO2003019005A1 (en) | 2001-08-24 | 2002-08-23 | A wind turbine and rotor assembly |
Country Status (2)
Country | Link |
---|---|
NZ (1) | NZ513769A (en) |
WO (1) | WO2003019005A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006096895A1 (en) * | 2005-03-18 | 2006-09-21 | Windtec Consulting Gmbh | Method and device for braking the rotor of a wind energy plant |
ES2274681A1 (en) * | 2005-02-09 | 2007-05-16 | Hidroelectrica Del Cadi, S.A. | Electrical generator has rotor sharing common axis with generator to produce force based on fluid movement, stator that freely rotates with respect to support of generator unit, and counterbalance with adjustable length arranged in casing |
WO2011000975A1 (en) * | 2009-06-30 | 2011-01-06 | Tempero 2000 S.L. | Wind turbine with compensated motor torque |
WO2011039777A3 (en) * | 2009-10-01 | 2011-11-03 | Varadharajan Ponnudurai | System for controlling cone and pitch angle of a rotor blade assembly of a wind turbine |
WO2020176593A1 (en) | 2019-02-26 | 2020-09-03 | M&B IP Analysts, LLC | A yaw control device for a wind turbine |
WO2021069042A1 (en) * | 2019-10-08 | 2021-04-15 | Vestas Wind Systems A/S | A method for starting a wind turbine with hinged wind turbine blades |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2293589A1 (en) * | 1974-12-05 | 1976-07-02 | Bouiges Didier | Windmill with hinged blades - has inclination adjusted by screw mechanism rotating meshing quadrants |
DE2546884A1 (en) * | 1975-10-20 | 1977-04-21 | Goslich Hans Dietrich | Wind operated turbine for power production - has blades pivoted on pins to limit axial bending moments |
DE2739297A1 (en) * | 1976-08-31 | 1978-03-02 | Stichting Energie | Rotary wind powered engine - has automatically varying blade pitch angle and additional pivot for blade tilt |
EP0009767B1 (en) * | 1978-10-11 | 1982-02-10 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Single-bladed wind-turbine rotor and a method for starting and stopping same |
DE3130257A1 (en) * | 1981-07-31 | 1983-02-17 | Louis L. 7570 Baden-Baden Lepoix | Device for converting the kinetic energy of the wind into another type of energy, preferably into electric energy |
US4517467A (en) * | 1982-07-24 | 1985-05-14 | Messerschmidt-Bolkow-Blohm Gmbh | Wind turbine with gale protection |
US4950131A (en) * | 1988-06-15 | 1990-08-21 | F.I.M.A.C. Fabbrica Italiana Macchine Aria Compressa S.P.A. | High-efficiency turbine, in particular for exploiting wind power in auxiliary power sources for aeronautical applications |
-
2001
- 2001-08-24 NZ NZ513769A patent/NZ513769A/en unknown
-
2002
- 2002-08-23 WO PCT/NZ2002/000165 patent/WO2003019005A1/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2293589A1 (en) * | 1974-12-05 | 1976-07-02 | Bouiges Didier | Windmill with hinged blades - has inclination adjusted by screw mechanism rotating meshing quadrants |
DE2546884A1 (en) * | 1975-10-20 | 1977-04-21 | Goslich Hans Dietrich | Wind operated turbine for power production - has blades pivoted on pins to limit axial bending moments |
DE2739297A1 (en) * | 1976-08-31 | 1978-03-02 | Stichting Energie | Rotary wind powered engine - has automatically varying blade pitch angle and additional pivot for blade tilt |
EP0009767B1 (en) * | 1978-10-11 | 1982-02-10 | Messerschmitt-Bölkow-Blohm Gesellschaft mit beschränkter Haftung | Single-bladed wind-turbine rotor and a method for starting and stopping same |
DE3130257A1 (en) * | 1981-07-31 | 1983-02-17 | Louis L. 7570 Baden-Baden Lepoix | Device for converting the kinetic energy of the wind into another type of energy, preferably into electric energy |
US4517467A (en) * | 1982-07-24 | 1985-05-14 | Messerschmidt-Bolkow-Blohm Gmbh | Wind turbine with gale protection |
US4950131A (en) * | 1988-06-15 | 1990-08-21 | F.I.M.A.C. Fabbrica Italiana Macchine Aria Compressa S.P.A. | High-efficiency turbine, in particular for exploiting wind power in auxiliary power sources for aeronautical applications |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2274681A1 (en) * | 2005-02-09 | 2007-05-16 | Hidroelectrica Del Cadi, S.A. | Electrical generator has rotor sharing common axis with generator to produce force based on fluid movement, stator that freely rotates with respect to support of generator unit, and counterbalance with adjustable length arranged in casing |
WO2006096895A1 (en) * | 2005-03-18 | 2006-09-21 | Windtec Consulting Gmbh | Method and device for braking the rotor of a wind energy plant |
WO2011000975A1 (en) * | 2009-06-30 | 2011-01-06 | Tempero 2000 S.L. | Wind turbine with compensated motor torque |
JP2012531552A (en) * | 2009-06-30 | 2012-12-10 | テンペロ 2000 エス.エル. | Wind turbine with compensated motor torque |
US8841794B2 (en) | 2009-06-30 | 2014-09-23 | Tempero 2000 S.L. | Wind turbine with compensated motor torque |
EA022481B1 (en) * | 2009-06-30 | 2016-01-29 | Темперо 2000 С.Л. | Wind turbine with compensated motor torque |
CN102803713B (en) * | 2009-06-30 | 2017-04-12 | 田普洛2000有限公司 | Wind turbine with compensated motor torque |
WO2011039777A3 (en) * | 2009-10-01 | 2011-11-03 | Varadharajan Ponnudurai | System for controlling cone and pitch angle of a rotor blade assembly of a wind turbine |
WO2020176593A1 (en) | 2019-02-26 | 2020-09-03 | M&B IP Analysts, LLC | A yaw control device for a wind turbine |
EP3908747A4 (en) * | 2019-02-26 | 2022-11-09 | Wind Buzz Ltd. | A yaw control device for a wind turbine |
WO2021069042A1 (en) * | 2019-10-08 | 2021-04-15 | Vestas Wind Systems A/S | A method for starting a wind turbine with hinged wind turbine blades |
Also Published As
Publication number | Publication date |
---|---|
NZ513769A (en) | 2001-09-28 |
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