Wind Patents for Sale or License

A differential vertical wind turbine (DVWT) uses a sun gear to control plural planetary gears of the blade assemblies. The sun gear has half circumference of its teeth removed. At teeth removed zone, each blade assembly is free to rotate and the blade has the center of pressure located at its tail s...

A system for generating its own air currents to run electric turbines. The system includes: a vertical tower or support provided with a rotating disk at its upper end, up to four laterally extending arms connected to the disk, each arm carrying a wind turbine generator with rotating blades/rotors at...

The venturi wind turbine has been developed for high torque low rotor speed applications such as water pumping, water desalination, air compression and pond aeration. The twin rotor configuration creates an area of low pressure between the rotors. This low pressure area reduces the drag of the rot...

Turbine design created for a large coefficient of power. Additionally used for this thrust force that acts on the blades. Wind-driven power plant with wind wheels with changing axles has tower with generator, reducer turn mechanism, mast, drives for correction of angle of attack of blades, wind whee...

This machine allows for a truly torque conversion with smoothly changed ratio while at work. It complies with the following formula: any number to any number including negative numbers. Because of this properties, it allows to eliminate need for a t...

About 9 years ago I learned that the wind at high altitude (Airborne Wind) is more continuous and much more stronger than near-ground wind. Since then, I focused my efforts to find a way to generate electric power by harnessing this wind, until I was able finally to develop this method which achiev...

A vertical axis wind turbine is disclosed, including an axle and a plurality of blades circumferentially spaced about the axle and coupled to the axle. Each blade can include an outer surface and an inner surface, the outer surface and inner surface meeting at a leading edge and a trailing edge. Eac...

The invention refers to wind-power engineering and may be used for the generation of electrical energy or in mechanical works. The wind-powered engine consists of a vertical shaft installed in the bearing assembly and connected with the transmission of mechanical energy consumers. The radial blade o...

Electricity is generated from wind or water turbines 15, 16 using a hydraulic transmission between the turbines and the shared generator 130. The transmission is controllable so that the blade 40 tip speed ratio (TSR) of the turbine 15, 16 is infinitely adjustable independently of the generator 130 ...

The present invention relates to a reinforced blade for a wind turbine, particularly to a blade having a new arrangement of two or more girders in the blade, wherein each of the girders is connected to the upper part and the lower part of the shell and forms an angle with another girder thereby stre...

The present invention relates to a reinforced blade for a wind turbine, particularly to a blade having at least one elongated reinforcing member connected inside the shell for increasing the strength of the blade, each of the at least one elongated reinforcing member having a first end and a second ...

The highest fidelity and lowest risk method of estimating an airframe aerodynamic properties is via a well-structured wind tunnel test program. Unfortunately, this method of obtaining aerodynamic data is also very expensive. APL's AirSpeed modeling and simulation software allows a user to plan a win...

A system and method for efficiently capturing electrical energy from a variable-speed generator are disclosed. The system includes a matrix converter using full-bridge, multilevel switch cells, in which semiconductor devices are clamped to a known constant DC voltage of a capacitor. The multilevel m...

A variable speed wind turbine generator system to convert mechanical power into electrical power or energy and to recover the electrical power or energy in the form of three phase alternating current and return the power or energy to a utility or other load with single phase sinusoidal waveform at s...

A thick airfoil for the root region of the blade of a wind turbine. The airfoil has a thickness in a range from 24%-26% and a Reynolds number in a range from 1,000,000 to 1,800,000. The airfoil has a maximum lift coefficient of 1.4-1.6 that has minimum sensitivity to roughness effects. U.S. Paten...

A family of airfoils for a blade of a cooling-tower fan, is provided wherein the blade has a root region and a tip region, the family of airfoils comprises an airfoil (30) in the root region of the blade having a Reynolds number of 500,000, and an airfoil (20) in the tip region of the blade having a...

Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects...

Airfoils for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of a...

The Invention The new type of fuel cell utilizes a unique nano-porous proton conducting membrane and improved fuel cell components including improved anodic and cathodic catalysts, membrane electrode assembly and bipolar plates with flow fields for both solution and gas. A hydrogen/bromine cell wa...

BACKGROUND The increasingly wide spread use of wind generation on power networks imposes a greater requirement for wind-farms to contribute to security of network operation in the same way as conventional generating stations based on synchronous generators. DFIG controllers to date have concentrated...

A variable speed wind turbine generator system to convert mechanical power into electrical power or energy and to recover the electrical power or energy in the form of three phase alternating current and return the power or energy to a utility or other load with single phase sinusoidal waveform at s...

A system and method for efficiently capturing electrical energy from a variable-speed generator are disclosed. The system includes a matrix converter using full-bridge, multilevel switch cells, in which semiconductor devices are clamped to a known constant DC voltage of a capacitor. The multilevel m...

A thick airfoil for the root region of the blade of a wind turbine. The airfoil has a thickness in a range from 24%-26% and a Reynolds number in a range from 1,000,000 to 1,800,000. The airfoil has a maximum lift coefficient of 1.4-1.6 that has minimum sensitivity to roughness effects....

A family of airfoils for a blade of a cooling-tower fan, is provided wherein the blade has a root region and a tip region, the family of airfoils comprises an airfoil (30) in the root region of the blade having a Reynolds number of 500,000, and an airfoil (20) in the tip region of the blade having a...

Airfoils for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of a...

Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects...

A variable speed wind turbine generator system to convert mechanical power into electrical power or energy and to recover the electrical power or energy in the form of three phase alternating current and return the power or energy to a utility or other load with single phase sinusoidal waveform at s...

A system and method for efficiently capturing electrical energy from a variable-speed generator are disclosed. The system includes a matrix converter using full-bridge, multilevel switch cells, in which semiconductor devices are clamped to a known constant DC voltage of a capacitor. The multilevel m...

A thick airfoil for the root region of the blade of a wind turbine. The airfoil has a thickness in a range from 24%-26% and a Reynolds number in a range from 1,000,000 to 1,800,000. The airfoil has a maximum lift coefficient of 1.4-1.6 that has minimum sensitivity to roughness effects....

A family of airfoils for a blade of a cooling-tower fan, is provided wherein the blade has a root region and a tip region, the family of airfoils comprises an airfoil (30) in the root region of the blade having a Reynolds number of 500,000, and an airfoil (20) in the tip region of the blade having a...

Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects...

Airfoils for the blade of a wind turbine wherein each airfoil is characterized by a thickness in a range from 16%-24% and a maximum lift coefficient designed to be largely insensitive to roughness effects. The airfoils include a family of airfoils for a blade 15 to 25 meters in length, a family of a...