Abrégé

The present disclosure provides a blade for a wind turbine. The wind turbine has an axis about which in use the blade rotates. The blade is arranged for orientation along the axis and has a predetermined twisted shape. The blade has a first and an opposite second side portion. The first and second side portions have edges and are coupled together at the edges. The first and second side portions are shaped such that a blade body is formed that is shaped such that maintaining the predetermined twisted shape of the blade is facilitated.

Classes IPC  ?

• F03D 3/06 - Rotors
• F03D 11/04 - Structures de montage

Abrégé

The present disclosure provides a wind turbine. The wind turbine has an axis about which in use the blade rotates. The blade is arranged for orientation along the axis and has a longitudinal twist. The blade comprises an inner blade portion and an outer blade portion. The inner blade portion is in use closer to the axis than the outer blade portion. The outer blade portion has an angular orientation that varies relative to the inner blade portion in a direction along the axis.

Classes IPC  ?

• F03D 3/06 - Rotors
• F03D 11/04 - Structures de montage

Abrégé

The present disclosure provides a blade assembly for a wind turbine, such as a vertical axis wind turbine. The blade assembly comprises 3 or more blades and has an axis of rotation about which in use the blades rotate. In one variation the blades are elongated and have first and second ends and are twisted between their ends. The blades are positioned along the axis of rotation in a manner such that the first (bottom) end of each blade has a portion that has substantially the same angular orientation as a portion of the second (top) end of an adjacent blade. Alternatively or additionally the blades are arranged for orientation along the axis of rotation and are twisted about an axis of twist. The axis of twist substantially coincides with the axis of rotation of the wind turbine.

Classes IPC  ?

• F03D 3/06 - Rotors
• F03D 11/04 - Structures de montage

Abrégé

The present disclosure provides a method of forming an airfoil for a wind turbine. The airfoil has a first side portion and an opposite second side portion and having a twist along an axis of the airfoil. The method comprises providing first and second mould elements for moulding the first and the second side portions, respectively. The method also comprises positioning a substantially rigid elongate truss having the twist along an axis of the elongate truss between the first and second mould elements to that the first and second mould elements surround at least the majority of the rigid elongate truss and an interior space. Further, the method comprises introducing a liquid material into the interior space so that at least a portion of the elongate rigid truss is embedded in the liquid material, the liquid material being arranged for hardening; and, after hardening of the liquid material. In addition, the method comprises removing the hardened material with the elongated rigid truss and the mould elements from each other.

Classes IPC  ?

• F03D 3/02 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor comportant plusieurs rotors
• B29C 33/42 - Moules ou noyauxLeurs détails ou accessoires caractérisés par la forme de la surface de moulage, p. ex. par des nervures ou des rainures
• B29C 39/02 - Moulage par coulée, c.-à-d. en introduisant la matière à mouler dans un moule ou entre des surfaces enveloppantes sans pression significative de moulageAppareils à cet effet pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés
• B29C 33/00 - Moules ou noyauxLeurs détails ou accessoires
• B29C 37/00 - Éléments constitutifs, détails, accessoires ou opérations auxiliaires non couverts par le groupe ou
• F03D 3/06 - Rotors

Abrégé

The present disclosure provides an airfoil for a vertical axis wind turbine. The airfoil comprises an elongated member having a longitudinal axis and first and second ends. The airfoil has a longitudinal twist between the first and second ends and has a leading surface (14) and an opposite trailing surface (15) extending between the first and second ends. The trailing surface and also the leading surface of the airfoil have at least one concave longitudinally extending recess.

Classes IPC  ?

• F01D 5/12 - Aubes
• F03D 3/06 - Rotors

Abrégé

An electric generator (40) is disclosed. The generator has a first (41) and a second (42) component having a common axis (3) and rotatable relative to each other around the common xis (3), the components being arranged for the generation of electricity on their relative rotation. There is a first set of poles (50) connected to the first component (41), the poles being spaced apart around the common axis (3). There is a second (45A) and a third set (45B) of poles connected to the second component (42), the poles of each respective second (45A) and third (45B) set being spaced apart around the common axis (3), the second set (45A) and the third set (45B) of poles being located with respect to each other so as to reduce cogging.

Classes IPC  ?

• H02K 16/00 - Machines avec plus d'un rotor ou d'un stator
• H02K 1/00 - Détails du circuit magnétique
• F03D 3/00 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor
• H02K 3/00 - Détails des enroulements

Abrégé

The present disclosure provides a structure and method for erecting a mast of a vertical axis wind turbine. The structure comprises a base portion of a vertical axis wind turbine arranged for positioning on a support surface. The structure also comprises a pivotable coupling for coupling a mast of the vertical axis wind turbine to the base portion in a manner such that the mast is pivotable to a substantially vertical position whereby the structure is arranged for erecting the mast of the vertical axis wind turbine.

Classes IPC  ?

• F03D 11/04 - Structures de montage
• E04H 12/34 - Dispositions pour élever ou abaisser des tours, mâts, poteaux, corps de cheminée ou analogues
• F03D 3/02 - Mécanismes moteurs à vent avec axe de rotation sensiblement perpendiculaire au flux d'air pénétrant dans le rotor comportant plusieurs rotors