The present invention is an improved wind turbine comprising: a wind turbine wheel having a hub, a rim and a cable extending between the hub and the rim; a set of airfoils rotatably carried by the cable and disposed between the hub and the rim; a cinch attached to the cable and disposed between adjacent airfoils; and, an upturned section included in at least one airfoil in the set of airfoils and disposed at a trailing edge of the airfoil wherein each airfoil has a different angle of attack relative to an adjacent airfoil.

This invention is a wind turbine support assembly comprising that can include an anchored buoy connected to a main anchor line; a docking line attached to the floatable support and the anchored buoy for securing the floatable support to the anchored buoy; a trolley removably and slidably attached to the main anchor line; a secondary anchor line attached to the trolley and a secondary anchor; and, a drop line removably attached to the secondary anchor configured to lower the secondary anchor in proximity to the main anchor so that the trolley, secondary anchor line, and secondary anchor is configured to provide an anchor support structure for the main anchor.

A horizontal-shaft wind machine having improved low wind speed performance and greater overall efficiency consists of multiple rotors, wherein each successive rotor is larger in diameter than the previous rotor moving from the most windward rotor to the most leeward rotor. Each rotor may be coupled to a shroud/diffuser that is displaced axially downwind from the rotor.

A wind turbine assembly is provided. The assembly includes a support structure and a wind turbine mounted on the support structure. The wind turbine includes a front face with blades defining a surface area to engage incoming wind, a roll axis about which the wind turbine can rotate in response to incoming wind to drive an electric generator, where the support structure defines a horizontal tilt axis about which the wind turbine can pitch forward and backward. The tilt axis divides the surface area of the wind turbine into upper and lower portions of unequal size, such that incoming wind on the front face of the wind turbine applies unequal force to the upper and lower portions of the surface area of the wind turbine to induce pitch of the wind turbine about the tilt axis.

The present invention is concerned with a wind turbine which is designed to start rotating in lower wind speeds than is conventionally possible, the wind turbine comprising a power take off shaft on which a first rotor is mounted, the first rotor having a first diameter, and on which shaft a rotatable augmentor in the form of a second rotor is mounted coaxially of the first rotor, the second rotor having a second diameter smaller than the first diameter.

A horizontal-shaft wind machine having improved low wind speed performance and greater overall efficiency consists of multiple rotors, wherein each successive rotor is larger in diameter than the previous rotor moving from the most windward rotor to the most leeward rotor. Each rotor may be coupled to a shroud/diffuser that is displaced axially downwind from the rotor.

The wind turbine includes a wind driven turbine wheel rotatable about a central axis that has sail wings that catch the wind and rotate the turbine wheel. An anchor has its anchor line attached to the turbine wheel at its axis of rotation to prevent tilting the wind turbine in response to high wind conditions. A set of streamers attached to the spokes at one end and including a free end wherein the free end is disposed in a space defined between two adjacent spokes when the turbine wheel is rotating. A trolley removably and slidably attached to a main anchor line, a secondary anchor line attached to the trolley and a secondary anchor; and, a drop line removably attached to the secondary anchor configured to lower the anchor to the main anchor so that the trolley, secondary anchor line and secondary anchor is configured to provide an anchor support structure for the main anchor.

The application relates to unidirectional hydrokinetic turbines having an improved flow acceleration system that uses asymmetrical hydrofoil shapes on some or all of the key components of the turbine. These components that may be hydrofoil shaped include, e.g., the rotor blades (34), the center hub (36), the rotor blade shroud (38), the accelerator shroud (20), annular diffuser(s) (40), the wildlife and debris excluder (10, 18) and the tail rudder (60). The fabrication method designs various components to cooperate in optimizing the extraction of energy, while other components reduce or eliminate turbulence that could negatively affect other component(s).

A wind power plant comprises a platform having a deck and a frame. The frame comprises a plurality of generator stations, each configured for receiving and supporting a respective removable wind turbine generator. Generator conveyance means are configured and arranged for moving a wind turbine generator between the deck and a generator station. The wind turbine generator comprises a housing in which a turbine is rotatably arranged. The turbine comprising a plurality of blades interconnected by a peripheral rim; and the rim comprises a plurality of magnets. The housing comprises a plurality of coils arranged in close proximity to the peripheral rim. The platform may be a floating platform, supported by at least a main hull, connectable to a seabed via turret mooring, whereby the power plant is allowed to weathervane.

The invention relates to a device for converting kinetic energy of a flowing medium to electrical energy, comprising a rotor for placing in the flowing medium and a generator connected to the rotor. The rotor comprises a tube with one or more vanes mounted on the inner side of the tube and extending radially to the centre thereof, wherein the tube is mounted for rotation about a horizontal axis. A length of the tube in horizontal direction amounts here to at least 25% of a diameter of the tube in vertical direction. An outflow part diverging in the flow direction can connect to a rear edge of the tube as seen in flow direction of the medium. The tube can be bearing-mounted in a frame via a central shaft mounted on the inner ends of the vanes. The frame can on the other hand comprise an outer bearing, for instance a stator tube, enclosing the tube. The inner ends of the vanes can then lie at a distance from each other, so leaving clear a central passage. The generator can be connected to the externally mounted tube via a cardan shaft or endless connecting member, in particular a belt or chain, co-acting with the periphery of the tube, or can be operatively connected to the central shaft in the case of a central mounting.