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| Number | Title | Issue Date |
| 8186949 | Method for damping tower vibrations in a wind turbine installation A method in connection with a wind turbine installation for damping tower vibrations, in particular a floating wind turbine installation comprising a floating cell, a tower arranged over the floating cell, a generator mounted on the tower that is rotatable in relati... | 05/29/2012 |
| 8147195 | Orientation device for water current power generating apparatus A water current generating device is provided that consists of a main body and a horizontal axis rotor attached by a mechanical connection to a fixed support structure. Under the action of one or more hydrodynamic thrusters, the main body of the turbine is rotated a... | 04/03/2012 |
| 8043055 | Wind turbine generator system A wind turbine generator system is provided with a nacelle supporting a wind turbine rotor, a nacelle rotation mechanism, an anemometer, and a control apparatus controlling the nacelle rotation mechanism. Said control apparatus calculates the wind direction deviatio... | 10/25/2011 |
| 7744345 | Wind power generator A vertical axis wind turbine provides a rotor assembly which rotates on bearing assemblies affixed to a rotor shaft supported by a base, the rotor assembly having vertical blades mounted between top and bottom plates, and power takeoff means to provide power by dire... | 06/29/2010 |
| 7458776 | Wind turbine yawing system, wind turbine and yawing process A yawing system for a wind turbine, the wind turbine comprising a tower fixed to the ground and a frame (1) housing an electric power generator, the tower and the frame (1) being joined by the yawing system which allows the orientation of the frame ( | 12/02/2008 |
| 7317260 | Wind flow estimation and tracking using tower dynamics A turbine control system for a variable speed electrical generator in a wind turbine mounted atop a support tower. The wind turbine converts wind energy into a driving torque applied to the generator. The control system includes a turbine support tower position sens... | 01/08/2008 |
| 7309930 | Vibration damping system and method for variable speed wind turbines A vibration damping technique for a wind turbine system is described. The wind turbine system includes a vibration damper, which provides a variable signal to control torque produced by a generator of the wind turbine system. The variable signal is based on generato... | 12/18/2007 |
| 7306728 | Rotor and methods of use A shaftless rotor includes at least two recessed portions. The portions are shaped to enable the rotor to rotate by the application of fluid flow to the rotor. The centre of mass of the rotor is substantially at the centre of the volume of space occupied by the roto... | 12/11/2007 |
| 7276809 | Wind turbine assembly and related method Wind turbine assembly, and related method, is provided that exploits an aerodynamically enhanced wind region of a building in proximity to a parapet of the building. A wind turbine assembly includes a support assembly configured to couple to a building in proximity ... | 10/02/2007 |
| 7267530 | Windmill apparatuses and methods of mounting blades to enhance their performance A windmill apparatus has multiple pairs of blades to enhance power output and lift performance. The apparatus has multiple double acting piston/cylinders actuated by the windmill, which includes several clutches that are used to engage and disengage the windmill fro... | 09/11/2007 |
| 7244097 | Device for adjusting the angle of incidence of a rotor blade of a wind power installation A device for the targeted adjustment of the angle of incidence of a rotor blade (13) which is rotatably mounted, at the foot (14) thereof, on a hub (12) of a rotor (11) of a wind power installation (10). The device includes a geari... | 07/17/2007 |
| 7244100 | Horizontal axis wind turbine and method for controlling horizontal axis wind turbine A horizontal axis wind turbine of an upwind type includes: a rotor for rotating around a rotor axis extending in a horizontal direction, the rotor being turned in a horizontal plane according to a wind direction; a nacelle having a symmetrical shape with respect to ... | 07/17/2007 |
| 7241105 | Watercraft with vertically collapsible vertical axis wind turbine and propeller flexible drive shaft A vertically collapsible vertical axis wind turbine may be used on land, or on a watercraft (e.g. a multihull such as a catamaran). The turbine may include a substantially vertical shaft; at least two vane supports mounted by the shaft; and at least two vertically c... | 07/10/2007 |
| 7238009 | Offshore windmill electric generators The described invention involves the windmill generation of electric power, particularly from offshore windmill generators. The invention involves inserting an adapter between the nacelle of the windmill and the tower, which includes either a leveling device or a vi... | 07/03/2007 |
| 7230348 | Infuser augmented vertical wind turbine electrical generating system A wind turbine for generating electrical power having a vertical “Savonius rotor type” wind rotatable turbine with multiple fixed pitch blades and a rotatable wind inlet duct having an identical number of multiple infuser-shaped aerodynamic guides as the pitch b... | 06/12/2007 |
| 7218013 | Wind powered generator A wind powered electrical generation assembly having a portable wind powered generator tower for supporting a wind powered generator allowing the wind powered generator to be raised, lowered, and removed from the tower. The wind powered electrical generation assembl... | 05/15/2007 |
| 7215035 | Method and apparatus for converting wind generated electricity to constant frequency electricity for a utility grid A method and apparatus for converting wind generated electricity to constant frequency electricity for supplying it to a utility grid. use a wind turbine generator having a doubly fed induction generator. Above the synchronous speed of the generator, the electricity... | 05/08/2007 |
| 7207777 | Methods of handling wind turbine blades and mounting said blades on a wind turbine, system and gripping unit for handling a wind turbine blade The invention relates to methods of handling wind turbine blades and mounting said blades on a wind turbine, said method comprising the steps of lifting a wind turbine hub to the nacelle of wind turbine with a lifting system and mounting the hub on the nacelle. Furt... | 04/24/2007 |
| 7190086 | Wind energy plant with an asynchronous machine for determining the azimuth position An asynchronous machine has a first rotor/stator arrangement in which the rotor is connected to a shaft, and a method of controlling such an asynchronous machine is provided. A drive is provided which permits nullification of the play of the mechanical components in... | 03/13/2007 |
| 7183664 | Methods and apparatus for advanced wind turbine design A wind turbine system includes a variable blade assembly including adjustable sails and wing shaped masts expanding the wind velocity capture envelope. The blade assembly turns a hydraulic pump, which pressurizes fluid and stores the pressurized fluid in a chamber i... | 02/27/2007 |
| 7121804 | Fan system A wind power generating system that includes a series of progressively larger fan fans, the fans positioned in series relative to one another such that the blades of the trailing fans project into the wind stream that has been disturbed by the preceding fan and the ... | 10/17/2006 |
| 7118339 | Methods and apparatus for reduction of asymmetric rotor loads in wind turbines A method for reducing load and providing yaw alignment in a wind turbine includes measuring displacements or moments resulting from asymmetric loads on the wind turbine. These measured displacements or moments are used to determine a pitch for each rotor blade to re... | 10/10/2006 |
| 7086835 | Horizontal axis wind turbine and method for controlling horizontal axis wind turbine A horizontal axis wind turbine includes: a yaw sensor; a rotor rotating around a rotor axis extending in a substantially horizontal direction, the rotor axis rotating in a substantially horizontal plane depending on wind direction; a plate-like member disposed on a ... | 08/08/2006 |
| 7075189 | Offshore wind turbine with multiple wind rotors and floating system A wind energy conversion system optimized for offshore application. Each wind turbine includes a semi-submersible hull with ballast weight that is moveable to increase the system's stability. Each wind turbine has an array of rotors distributed on a tower to distrib... | 07/11/2006 |
| 7023104 | Wave energy conversion device for desalination, ETC An impulse-type “wave motor” employs a seabed-mounted or supported structure mounting a wave energy absorbing panel on a hinged lever arm for reciprocation motion to obtain optimal absorption of wave energy from wave motion in the sea. For deepwater wavelengths ... | 04/04/2006 |
| 7011497 | Shaft/hub unit for wind turbine rotor A rotor shaft/hub unit for a wind energy plant with a rotor shaft provided with a rotor bearing seat which is connected to a rotor hub provided with a blade or blade bearing connection, the rotor hub and rotor shaft are manufactured in one piece from bonded fiber fa... | 03/14/2006 |
| 6998729 | Wind energy plant having an observation platform The invention concerns a wind power installation comprising a rotor which is coupled to a generator within a machine housing. Such wind power installations have already long been known, for example the wind power installations of types E-40 and E-66 from Enercon, Au... | 02/14/2006 |
| 6974307 | Self-guiding wind turbine A self-guiding wind turbine made of two reinforced parallel girders whose side center of thrust is displaced from the column axis where it is supported and turns. Its dihedral-shaped two-bladed rotor is self-stabilizing since its center of thrust is behind its cente... | 12/13/2005 |
| 6951443 | Wind turbine ring/shroud drive system A wind turbine capable of driving multiple electric generators having a ring or shroud structure for reducing blade root bending moments, hub loads, blade fastener loads and pitch bearing loads. The shroud may further incorporate a ring gear for driving an electric ... | 10/04/2005 |
| 6945752 | Azimuthal driving system for wind turbines Wind power installations generally have an active drive for wind direction tracking. The active drive rotates the machine housing of the wind power installation in such a way that the rotor blades of the rotor are oriented in the direction of the wind. Multiple azim... | 09/20/2005 |
| 6940186 | Wind turbine having sensor elements mounted on rotor blades The invention relates to a wind power plant with a tower, a rotor having at least one rotor blade being substantially radially distant with respect to a rotor axis and being rotatably supported with respect to a substantially horizontal rotation axis in a portion at... | 09/06/2005 |
| 6927502 | Three-phase asynchronous motor driven azimuthal drive for wind power installations Wind power installations generally have an active drive for wind direction tracking. The active drive rotates the machine housing of the wind power installation in such a way that the rotor blades of the rotor are oriented in the direction of the wind. That drive wh... | 08/09/2005 |
| 6176675 | Yawing device and wind power plant comprising a yawing device A damping coupling is provided to reduce the oscillations of the yawing device of a wind power plant. The damping coupling transmits forces from a driving device to a yaw drive, and the damping coupling is arranged and positioned in such a way that the tr... | 01/23/2001 |
| 6113350 | Vertical-axle power machine A vertical-axle wind power machine comprises a vertical axle, a plurality of jointed radial arms, a plurality of counterbalanced oblique blades at the support points thereof, a friction-rewarding rotary speed multiplying transmission, and an automatic rot... | 09/05/2000 |
| 5551923 | Simulated articulated bird with wind activated wing flapping apparatus Disclosure is made in this application of apparatus to synchronize and change the pitch of wind actuated flapping wings of a simulated bird.... | 09/03/1996 |
| 5520505 | Wind amplified rotor platform (warp) An energy conversion device which comprises a stacked array of alternating yawable and fixed toroidal modules about a central core structure. The yawable toroids have typically four impact impellers mounted in their peripheral flow regions for the purpose... | 05/28/1996 |
| 5484257 | Wind energy device A device for generating rotating shaft power from atmospheric air includes an airfoil. A partition is disposed within the airfoil along the length thereof. The partition forms an upper chamber and a lower chamber within the airfoil. The partition includes... | 01/16/1996 |
| 5354175 | Wind turbine rotor hub and teeter joint A rotor hub is provided for coupling a wind turbine rotor blade and a shaft. The hub has a yoke with a body which is connected to the shaft, and extension portions which are connected to teeter bearing blocks, each of which has an aperture. The blocks are... | 10/11/1994 |
| 5348443 | Wind impeller A wind impeller that includes at least two rotor assemblies mounted to a base for rotation. Each rotor assembly has a plurality of spaced arms extending radially from a rotation axis with a vane attached at the end of each arm. The at least two rotor asse... | 09/20/1994 |
| 5292229 | Rotor bearing assembly for a wind power engine A rotor bearing assembly for a wind power engine exhibits great stability and strength, and reduces flexural stresses on a mast of a wind power engine. The bearing body (2) is suspended from and mounted on a horizontal pivot axis (X) and carries a rotor a... | 03/08/1994 |
