Abstract: A wind power generator has a nacelle; a hub rotatable about an axis of rotation with respect to the nacelle; at least two blades fitted to the hub; an electric machine which is fitted to the nacelle, is bounded by an inner surface extending about the axis of rotation, and has a rotor and a stator; and a cooling system for airflow cooling the electric machine, and which has a deflector body for defining a gap between the deflector body and the electric machine and guiding the airflow into the gap.

Abstract: A wind power generator has a nacelle; a hub rotatable about an axis of rotation with respect to the nacelle; at least two blades fitted to the hub; an electric machine which is fitted to the nacelle, is bounded by an inner surface extending about the axis of rotation, and has a rotor and a stator; and a cooling system for airflow cooling the electric machine, and which has a deflector body for defining a gap between the deflector body and the electric machine and guiding the airflow into the gap.

Abstract: A wind power generator has a nacelle; a hub rotatable about an axis of rotation with respect to the nacelle; at least two blades fitted to the hub; an electric machine which is fitted to the nacelle, is bounded by an inner surface extending about the axis of rotation, and has a rotor and a stator; and a cooling system for airflow cooling the electric machine, and which has a deflector body for defining a gap between the deflector body and the electric machine and guiding the airflow into the gap.

Abstract: A system for locking wind turbine rotating electric machine segments has a supporting structure extending about an axis of rotation and having a first mating face, and a plurality of first axial grooves, each communicating with the first mating face; a plurality of segments, each having a second mating face, and a second axial groove which is positioned facing and adjacent to one of the first grooves; and an expansion plug configured to engage a first and second groove facing each other; the first and second groove and the expansion plug being configured so that the expansion plug, when expanded, exerts a force with a radial component to lock the segment to the supporting structure along the respective second and first mating face.

Abstract: A wind turbine having an electric machine in turn having a stator, and a rotor which rotates about an axis of rotation with respect to the stator; the rotor having a number of magnetized modules, and a number of supports for supporting the magnetized modules and arranged about the axis of rotation; and wherein at least two of the supports are parallel connected electrically.

Abstract: A wind turbine rotary electric machine having a tubular body, in turn having a cylindrical wall; and a plurality of clips formed integrally with the cylindrical wall and configured so that each pair of facing clips defines a seat for housing an active sector.

Abstract: A wind turbine having an electric machine, in turn having a stator, and a rotor which rotates about an axis of rotation with respect to the stator; the rotor having a plurality of magnetized modules, and a rotor cylinder which extends circumferentially, rotates about an axis of rotation, and is configured to support the plurality of magnetized modules; and wherein the rotor cylinder is made of nonmagnetic material.

Abstract: A method of determining the magnetization level of permanent magnets of an electric machine, whereby a probe winding is placed in an electric machine having a stator with a plurality of stator winding, and a rotor with a plurality of permanent magnets; the probe winding is fixed with respect to the stator and links a magnetic flux produced by the permanent magnets; the rotor is rotated at an angular speed; an induced electric quantity is determined at terminals of the probe winding in response to passage of the permanent magnets; and the magnetization level of the permanent magnets is determined on the basis of the induced electric quantity detected.

Abstract: A wind power generator has a nacelle; a hub rotatable about an axis of rotation with respect to the nacelle; at least two blades fitted to the hub; an electric machine which is fitted to the nacelle, is bounded by an inner surface extending about the axis of rotation, and has a rotor and a stator; and a cooling system for airflow cooling the electric machine, and which has a deflector body for defining a gap between the deflector body and the electric machine and guiding the airflow into the gap.

Abstract: A wind power generator has a nacelle; a hub rotatable about an axis of rotation with respect to the nacelle; at least two blades fitted to the hub; an electric machine which is fitted to the nacelle, is bounded by an inner surface extending about the axis of rotation, and has a rotor and a stator; and a cooling system for airflow cooling the electric machine, and which has a deflector body for defining a gap between the deflector body and the electric machine and guiding the airflow into the gap.

Abstract: A ski-lift seat return device having a supporting structure; a reel mounted to rotate about an axis with respect to the supporting structure; a cable wound about the reel; a spring mechanism for opposing unwinding of the cable, and for rewinding the cable unwound off the reel; and a contactless magnetic brake connected to the reel and the supporting structure to adjust the brake torque as a function of the rotation speed of the reel; and wherein the magnetic brake has a first wall integral with and preferably defining part of the supporting structure; and a second wall connected movably to the reel and moved towards the first wall by the rotation speed of the reel; the first and second wall being coupled magnetically to each other.

Abstract: A wind power plant configured to produce electric energy has a foundation; a pylon extending along an axis; an electric generator mounted on top of the pylon; and a blade assembly which rotates with respect to the generator; the pylon having a portion made of flat, reinforced-concrete panels assembled such that the portion has a polygonal cross section.

Abstract: A wind turbine rotary electric machine having a tubular body, in turn having a cylindrical wall; and a plurality of clips formed integrally with the cylindrical wall and configured so that each pair of facing clips defines a seat for housing an active sector.

Abstract: A rotating machine has a stator and a permanent magnet rotor that is more easily made, lower cost, and lighter by virtue of a plurality of permanent magnet assemblies mounted on a rotor body. Each magnet assembly includes two facing core plate stacks supporting a permanent magnet between them. Each core plate stack is made from a plurality of core plates of substantially identical size and shape and with on or more holes in substantially the same location to form respective bores in the stack. A tie rod is formed in each bore and retains the plates in a stack via bevels in the holes of the end plates. Preferably, the tie rods also apply compressive force as a result of placing the stacked plates in an injection mold, injecting plastic into the mold to fill each bore with plastic, and allowing the plastic to cure. As the plastic cures, it shrinks so that the tie rods pull the end plates together. To enhance the pressure, the stacked plates can be compressed before and during the injection process.

Abstract: A wind turbine having an electric machine in turn having a stator, and a rotor which rotates about an axis of rotation with respect to the stator; the rotor having a number of magnetized modules, and a number of supports for supporting the magnetized modules and arranged about the axis of rotation; and wherein at least two of the supports are parallel connected electrically.

Abstract: A wind power turbine has a fixed assembly; a mobile assembly fitted to the fixed assembly to rotate about an axis with respect to the fixed assembly; and a locking device for making the mobile assembly and the fixed assembly integral with each other; the locking device has at least one groove formed on the fixed assembly or the mobile assembly and coaxial with the axis, and angular locking means that can be activated to pressure engage the groove.

Abstract: A ski-lift seat return device having a supporting structure; a reel mounted to rotate about an axis with respect to the supporting structure; a cable wound about the reel; a spring mechanism for opposing unwinding of the cable, and for rewinding the cable unwound off the reel; and a contactless magnetic brake connected to the reel and the supporting structure to adjust the brake torque as a function of the rotation speed of the reel; and wherein the magnetic brake has a first wall integral with and preferably defining part of the supporting structure; and a second wall connected movably to the reel and moved towards the first wall by the rotation speed of the reel; the first and second wall being coupled magnetically to each other.

Abstract: A bearing sealing arrangement for rotating machines uses a radially-acting labyrinth seal (2) to minimize bearing lubricant leakage and an axially-acting screw-type gasket (3) to return what fluid escapes through the labyrinth seal to the bearing (10). In embodiments, the labyrinth seal uses rings (4) with plastic wear surfaces formed about internal metal bands, the plastic forming corresponding profiles on the ends (27,28) of the bands so that the profiles interlock when overlapped to form the rings. The screw-type gasket preferably includes rotor-mounted helical fillets (22) formed in a section (21) that is retained in a seat (20) on the rotor. The section in embodiments is retained by inserting a ring-shaped key (23) into the section, thereby forcing the section into undercuts of the seat. The arrangement is particularly useful in wind machines, such as wind-turbines.

Abstract: A rotating machine with a permanent magnet rotor that is easier, lower cost, and lighter includes a plurality of permanent magnet assemblies (20) mounted on a rotor body (1). The magnet assemblies (20) are mounted via magnet holders that each include a pair of claws (2, 3) connected by a bridge (5) and forming a seat for a respective magnet assembly (20). The claws have terminal expansions (11) that extend beyond the bridge (5) and form a second seat in which a tightening section (9) is received. The claws (2, 3) can elastically pivot about the bridge (5) when the terminal expansions (11) are squeezed together or forced apart, allowing insertion of and securing the magnet assembly, respectively.

Abstract: The invention relates to a wind power current generator comprising a bearing, a tubular stator that carries a race of the bearing, a tubular rotor coaxial with the tubular stator that can rotate in relation to the stator, a hub connected to the rotor, and at least two blades radially extending away from the hub. According to the invention, the stator and the rotor are formed with substantially tubular cross sections and are concentric to one another. The opposing surfaces of the rotor and stator carry permanent magnets and windings. The stator and rotor extend beyond either side of the magnets and the windings in order to accommodate an antifriction bearing on at least one side. The tubular nature of the rotor and stator allows easy passage of workers within the generator for maintenance thereof and of the blades. Additionally, the tubular nature facilitates air flow through the structure and out the blades, cooling equipment within the structure and aiding de-icing of the blades.