Abstract: A floating platform for high-power wind turbines, comprising a concrete substructure, said concrete substructure forming the base of the platform, which remains semi-submerged in the operating position, and consisting of a square lower slab on which a series of beams and five hollow reinforced concrete cylinders are constructed, distributed at the corners and the center of said lower slab; a metal superstructure supported on the concrete substructure and forming the base for connection with the wind turbine tower, said tower being coupled at the center thereof; and metal covers covering each of the cylinders, on which the metal superstructure is supported and to which vertical pillars are secured, linked together by beams, which join at the central pillar by an element whereon the base of the wind turbine tower is secured.

Abstract: A method and apparatus for tuning the torsional natural frequency of a rotor is disclosed. At least one tuning slot is formed within the winding slots defined by radially projecting winding teeth. The tuning slot extends radially inward from the bottom of the winding slot a distance to tune the rotor to a desired torsional natural frequency. This tuning slot can be positioned preferably at the quadrature axis.

Abstract: A method and apparatus for tuning the torsional natural frequency of a rotor is disclosed. At least one tuning slot is formed within the winding slots defined by radially projecting winding teeth. The tuning slot extends radially inward from the bottom of the winding slot a distance to tune the rotor to a desired torsional natural frequency. This tuning slot can be positioned preferably at the quadrature axis.