A double rotor for vertical axis turbine includes two single three-vane rotors separated by a horizontal or separation plate, wherein such plate provides two different access areas to the propelling fluid, wherein between each of the three vanes of each of the single rotors it is determined surface continuity attenuated by curves in the fluid flow direction preventing parasitic flows during rotation thereof.

Wind turbine system improved by the inventor for the production of electrical power, which comprises a shaft supported at two ends on two towers made of concrete or steel or another material, the lower half of which wind turbine is closed with a frustopyramidal shape in order that the wind does not pass and generate a “hill” effect and simply applies thrust to the upper part of the system. The system comprises sails composed of vanes in the form of a blade (double-arc) that rotate about themselves in order to utilize 100% of the different wind speeds and a possible stopping of the wind turbine system. The blades of the vanes of the wind turbine may be braced with respect to one another in order, where necessary, that same move at the same time. On account of the level of safety and stability it affords, the wind turbine allows a number of wind turbines to be placed in the direction of the wind.

A temporary kinetic energy storage-holder and energy transfer devise, comprising of a rotating cable preferably of steel, between two fixed rotating points each a thrust bearings and a one direction rotation hub at the kinetic energy source, coupled to at one end to a kinetic energy capturing devise such as wind turbine, water wheel, animal human or any other kinetic energy generating or collector devise, and at the other end, coupled to an electricity generating devise, a generator, directly or via a geared speed modifier to control generator impute. And all this attached to a supporting structure, tower, pole, pipe column or the ground, to transform kinetic energy into electricity.

The present disclosure is directed to a method for estimating tower loads, such as tower deflection, of a wind turbine. The method includes receiving an estimate of slow variations in thrust of a tower of the wind turbine. The method also includes determining, via one or more sensors, tower accelerations of the tower of the wind turbine. Thus, the method also includes estimating the tower loads of the wind turbine as a function of the estimate of slow variations in thrust of the tower and the tower accelerations.

In a bearing for vertical axis windmill configured to rotatably support a vertical axis of a vertical axis windmill, the bearing includes a ball (7), a diameter of the ball and a curvature of a rolling groove of the bearing are set to satisfy a predetermined starting torque and a load rating. For example, the curvature of the rolling groove of the bearing is 54% or more and 100% or less, and the diameter of the ball has a ratio of 20% or less with respect to a vertical shaft (2).

The invention provides a vertical axis wind turbine to produce power relative to wind speed resulting in high torque output. During operation, all the blades of the turbine are in a continuous movement of changing their angles from fully open to fully overlap position during each rotation. At the heart of this concept is a frame circumventing the rotor, formed of a pair of top coaxial rings superimposed over bottom coaxial rings defining a central vertical axis distant from the shaft axis, each pair of top and bottom rings are freely movable by being mounted on bushings to the shaft by radially disposed beams and vertically disposed mounting members fixedly connecting the top and bottom rings. The Blade angle relative to incoming wind is controlled by these pair of rings which are controlled by the pair of weathervanes rotating on the central turbine shaft axis.

A wind turbine having one or more magnets for reducing friction between the turbine support and a turbine rotor. The reduction of friction between the turbine rotor and the turbine support allows for an increase in energy production and scale of the wind turbines. The magnet configuration employs a ring of cylindrically-shaped magnets at the bottom and opposed by a corresponding number of generally rectangular-shaped magnets. Bearing magnets are also employed for axial stabilization.

A wind turbine panel is configured to distribute electricity to a load. The wind turbine panel includes a frame further comprising a first slot having a first slot first end and a first slot second end. A first alternator is located in a first alternator mount on the first slot first end. A second alternator is located in a second alternator mount on the first slot second end. A wind turbine is connected to the first alternator and the second alternator via a first alternator shaft and a second alternator shaft, respectively. The first alternator and the second alternator are electrically coupled to an electrical outlet point on the frame. Wind traveling through the frame rotates the wind turbine, impels the alternator shafts to generate electricity which is then transferred to an electrical outlet point and further to an electrical panel for use in a plurality of downstream applications.

A Savonius wind turbine includes a rotor assembly that rotates about a longitudinal axis. The rotor assembly includes at least two curved turbine blades extending parallel to the longitudinal axis and at least two support discs connected to the at least two curved turbine blades. At least one of the at least two support discs has at least one relief vent defined therein for allowing air to pass through the at least one support disc. The wind turbine may be provided with two rotor assemblies having their curved turbine blades arranged so that the rotor assemblies are driven to rotate in opposing rotational directions.

A mastless vertical axis wind turbine that comprises a plurality of sails that rotate about a vertical axis under the influence of wind. A platform is connected to and in tension with the plurality of sails at one or more points about the bottom of the plurality of the sails. Also, an external frame is connected to and in tension with the plurality of sails at one or more points about the top of the plurality of the sails. The external frame itself comprises a plurality of legs that converge above the plurality of sails at a central point about the vertical axis of rotation and extend beyond the path swept by the plurality of sails. A coupling mechanism connects one or more of the plurality of legs to the plurality of sails and allows the sails to rotate about the vertical axis of rotation while the legs remain stationary.