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2805results about "Renewable energy generation" patented technology
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Wind dam electric generator and method
InactiveUS6984899B1Constant windmill shaft rotational speedWind motor controlEngine fuctionsAir volumeEngineering
A vertical axis windmill is provided wherein the amount of wind directed to blades in the power producing part of rotation and the mechanical load of multiple generators is controlled by a feedback control to maintain a relatively constant rotational frequency of the shaft of the windmill. In a preferred embodiment, two wind foils extend radially outwardly from the blades to thereby provide a scoop capable of pulling in more air than would normally be received by the blades. The wind foils then direct the wind flow to the power producing part of rotation of the blades for maximum power output, when necessary. The wind foils can close to control the wind flow to the blades. The generating capacity of a plurality of generators is also controlled in response to shaft rotation to maintain substantially constant shaft rotation.
Owner:THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY
Windmill and windmill control method
A windmill includes a freely rotatable revolution shaft, a plurality of pairs of pivotal support rods provided at the revolution shaft, and wind receiving blades respectively and rotatably set between the pivotal support rods with wind receiving blade shafts. The windmill is applied to the driving of a lifting pump, a generator and the like by employing revolution driving force. An anemometer / anemoscope measures wind velocity and direction. A servo motor controls the direction of the wind receiving blades based on the detected velocity and direction. Various methods of control are also provided.
Owner:HIRAI TETSUO
Wind turbine device
ActiveUS7132760B2Reduce blade dragConvenient lengthPropellersRotary propellersDevice formOperational capabilities
Owner:BECKER WILLIAM S
Vertical axis wind turbine with optimized blade profile
InactiveUS20070104582A1Wind motor controlOther chemical processesLeading edgeVertical axis wind turbine
A high efficiency vertical axis wind turbine includes an optimized blade shape for increased torque output. The shape of the optimized profile includes a camber portion at a leading edge region of the blade with a maximum height to chord ratio (Y / C) at when the non-dimensional chord length (X / C) is approximately one third. An intermediate region follows the leading edge region and is characterized by a shallow convex region, followed by a flow reattachment surface at the trailing edge region characterized by a second concave region and a local maximum of the height to chord ratio at approximately four fifths of the non-dimensional chord length.
Owner:VIA VERDE LTD
Vertical axis wind turbine
InactiveUS6242818B1Rotational speed controlWind motor controlVertical axis wind turbineGravitational force
A vertical axis wind turbine having a plurality of blades around its periphery and a pivotable door associated with each blade. Each door has a pivot axis that is inclined outwardly toward the bottom of the turbine so that gravitational forces will pull the doors toward an open position. The doors are designed to move toward a closed position to at least partially block wind forces from the blades when the rotor rotates at potentially damaging speeds. The turbine has mating coils on the rotor and the support column to generate electrical energy when the rotor rotates.
Owner:SMEDLEY RONALD H
Modified Darrieus Vertical Axis Turbine
A lift-type turbine comprising at least three blades at circumferentially spaced positions is supported for rotation about a vertical axis. Each blade has an airfoil shape to generate a torque about the axis responsive to wind across the blades. A support comprising cables under tension is connected between adjacent ones of the blades to extend generally circumferentially about the turbine. Accordingly a minimum number of parts form the structure of the blades while minimizing the drag produced during rotation thereof due to the support members lying in a common circumferential path. The tension of the support members can support the blades in a pre-stressed condition to optimize the shape and performance thereof.
Owner:LUX
Wind turbine device
InactiveUS7362004B2Reduce blade dragConvenient lengthWind energy with electric storageWind motor supports/mountsDevice formOperational capabilities
Owner:BECKER WILLIAM S
Check valve turbine
InactiveUS20100233919A1Lower center of gravitySave significant amountPropellersPosition fixationEngineeringFloating platform
Aspects of an embodiment of a check valve turbine assembly include a rotation platform having an axis of rotation, a vertical member concentrically secured to the rotation platform about the axis of rotation, a rotatable sail assembly attached to the vertical member that includes a frame, a hinge beam, and a rotatable sub-sail assembly. The sub-sail assembly includes a stem beam, a sub-sail grid frame attached to the stem beam, and a plurality of flaps rotatably attached to the sub-sail grid frame and configured to move between a closed position and an open position relative to the sub frame. Aspects of a marine check valve turbine include a free-floating platform structure configured with an upper surface at or near a water surface and a vertical member secured to the platform structure about an axis of rotation and configured to extend from the upper surface of the platform structure.
Owner:ERSOY SEYHAN
Helical airfoil wind turbines
InactiveUS20110081243A1Reduces negative dragImprove efficiencyPropellersFinal product manufactureTurbineDynamo
An improved wind energy generator is described. This invention is a wind turbine that utilizes airfoils in unique designs that are made of lightweight materials. The turbine is manufactured by low cost production methods as portable units that are stacked in series to provide for significant power harvesting. The use of three dimensional twisted airfoils enable high efficiency and easy start up.
Owner:SULLIVAN JOHN T
Leveredged wind turbine w/ multiple generators
The invention is a vertical axis wind turbine that utilizes leverage to compound the force from the wind, thereby creating exstordinary power, enough to turn a plurality of generators, thereby reducing the cost per kilowatt of electricity. It has wind blocking means that when struck by the wind from behind they shift to a position to block the wind to absorb energy from the wind thereby causing the turbine to revolve. At the same time, the wind blocking means on the opposite side of the turbine are being struck by the wind on their front leading edge causing them to rotate up to a position where they do not block wind. The result is that one half of the turbine is always being driven by the wind to cause rotation while the opposite side of the turbine is always allowing wind to pass through it. It doesn't matter which direction the wind is coming from.
Owner:PAGE JOHN S JR
Wind-driven electricity generation device with savonius rotor
InactiveUS20080191487A1Easy to completeEasy to assembleRenewable energy generationMachines/enginesElectricityWind driven
A vertical wind-driven electricity generation device is described, which utilizes a unique segmented Savonius rotor and which is easily handled, transported, assembled and maintained, even by a single person. The blades of the rotor are segmented into a plurality of modest size blade pair segments, each of which comprises two (or optionally, three or four) low height, helically curved blade portions. The blade pair segments are preferably of the same height and diameter. The rotor is mounted on a central vertical shaft connected to a generator. When the plurality of blade portions are installed on the device's central shaft, the overall blade configuration functions as an unitary Savonius rotor. Flow of gas (normally air in the form of wind) causes the segmented Savonius rotor to move, turning the shaft and rotating member of the generator to rotate, causing the generator to generate electricity.
Owner:SAUER ENERGY +1
Magnetic vertical axis wind turbine
InactiveUS7303369B2Reduce frictionMaximize operation of systemPropellersWind motor controlElectricityAlternator
A lift and drag-based vertical axis wind turbine in which the vertical axis and foils mounted thereon are magnetically levitated above the turbine's base, thereby reducing friction within the system. The foils or vanes are three-dimensionally shaped about the vertical axis so as to resemble the billowed sail of a sailing ship and capture wind through 360 degrees of rotation under any wind condition. The system has an axial flux alternator using variable resistance coils which can be individually and selectively turned on or off depending on wind conditions and electrical draw requirements. The coils can also be used to produce mechanical drag on the system as desired to brake the turbine in high wind conditions or for maintenance. The system may be programmed to assess whether electricity generated by the system can be or should be transmitted to a public grid or stored locally on a chargeable battery system.
Owner:NIAGARA CENT RES
Wind turbine device
InactiveUS20070018464A1Reduce blade dragConvenient lengthWind energy with electric storageWind motor supports/mountsDevice formOperational capabilities
A hybrid blade wind turbine device formed of at least a pair of straight outer airfoil blades, and a pair of inner helical wing blades, as supported for rotation within a safety protective cage structure, which wind turbine can be mounted in the vertical, horizontal, or other aligned operational positions. The inner helical half wing blades, being preferably somewhat shorter than the length of the outer airfoil blades, act to “regularize” the swirling wind regime flowing through the hybrid wind turbine, so as to maximize the efficiency of the outer airfoil blades. The helical half wing blades can be formed of individual segmented vane segments to provide improved operational capabilities for the overall hybrid wind turbine. To best harness annualized available wind conditions, the hybrid wind turbine can be customized, through modification of the number of vane segments, the selection of the specific shape of the outer airfoil blades, and the specific operational positioning of the outer airfoil blades. Alternatively, the helical half wing blades can be formed as generally smooth-walled blades.
Owner:BECKER WILLIAM S
Omni-directional wind turbine electric generation system
Owner:WEPOWER +1
Vertical axis wind turbine
ActiveUS20110133474A1Increase torqueReduce resistanceWind motor controlRenewable energy generationVertical axis wind turbineVertical axis
A vertical axis wind turbine includes an upstanding support structure, a plurality of generators disposed on the support structure, a central shaft in rotatable communication with the generators and positioned along a central axis of the vertical-axis wind turbine, a plurality of struts extending from the central shaft, and a plurality of blades, each blade positioned at an end of a corresponding strut and oriented substantially vertically. The vertical axis wind turbine optionally includes strut ailerons, blade extension elements, or blade ailerons to increase the efficiency and duty cycle of the wind turbine.
Owner:JONATHAN HAAR
Vertical axis wind turbine
InactiveUS20070243066A1Less susceptible to flexion and extensionReduce maintenancePropellersPump componentsHydraulic pumpVertical axis wind turbine
A vertical axis sail-type wind turbine includes an array of sail-like structures that are mounted on rotating main masts. The sail-like structures can be oriented to interact with the wind. For example, when the sail-like structures are moving in a downwind direction, they are oriented to present a flat surface that is perpendicular to the wind direction. On the other hand, when the sail-like structures are moving in an upwind direction, they are oriented to present a surface that is at an angle that creates an upwind vector. The sail-like structures rotate about the sail masts, which are mounted to transverse mounting arms that are firmly mounted to a main mast. The main mast rotates, transferring power through a gear and shaft drive to hydraulic pumps in the tower. This hydraulic fluid pressure is then used to drive an electrical generator.
Owner:BARON RICHARD
Wind turbine
InactiveUS6853096B1Reliable electricityGas turbine plantsRenewable energy generationRotational axisElectricity
A rotation shaft is installed in the center of a wind turbine. Blades are secured to the rotation shaft to be circumferentially spaced apart one from another. Each blade has a lattice composed of transverse lattice elements and longitudinal lattice elements which are plaited to cooperatively define a plurality of spaces. In each space, a rotation adjustment piece is coupled to a first portion of a lattice element to be capable of rotating between a closing position where it closes a predetermined number of the spaces and an opening position where it opens a predetermined number of the spaces, so that the blades as a whole can be rotated irrespective of a wind direction. Electricity is generated using wind applied to the rotation shaft through rotation adjustment pieces.
Owner:YU YOUNG SIL +1
Vertical full magnetic suspension wind force power generator
InactiveCN1948746AEasy maintenanceEasy to replaceShaftsWind motor supports/mountsWind drivenDrive shaft
A vertical full-magnetic suspension wind-driven generator consists of a magnetic-suspension loading platform, a driving shaft, a generator, blades and a radial magnetic-suspension bearing. The magnetic-suspension loading platform is used for carrying the dead weight of the generator rotor, the driving shaft and the blades. The radial magnetic-suspension bearing is used, so the whole rotating part of the wind-driven magneto generator realize the magnetic suspension completely.
Owner:刘骁
Vertical axis wind turbine with controlled gybing
InactiveUS6926491B2Efficient capturePropellersWind motor controlElectricityVertical axis wind turbine
A device for generating electricity in which wind blowing from any direction causes the rotation of sails around a vertical tower. As the sails rotate the sails moving toward the wind are automatically feathered, and the sails moving away from the direction of the wind are prevented from being feathered by sail restraints. An inner sail restraint positions each sail so that the sail gybes at an earlier time than would otherwise occur. An outer sail restraint “catches” the sail as it gybes, capturing much of the energy of the gybe, adding additional rotational force. The device may be used to extract energy from the wind to produce electricity.
Owner:MIGLER BERNARD
Multi-Axis Wind Turbine With Power Concentrator Sail
InactiveUS20090191057A1Effective and reliableAvoid disruptionPropellersPump componentsVisibilityAir movement
A wind energy to electrical power conversion device provides a protected multiple turbine mechanism axially aligned to convert kinetic energy of air movement, i.e. wind (or other moving fluid such as water), into rotational mechanical power to directly create electrical energy by the reaction of the wind with the turbine. The present wind energy to electrical power conversion device may either be configured as a vertical axis wind turbine (VAWT) or horizontal axis wind turbine (HAWT). An associated wind gathering sail automatically repositions itself to maximize wind intake and to collect and concentrate the wind prior to converting the wind into energy via the axially aligned multi-turbine mechanism into electrical energy. The remaining wind is released via a leeward-facing exhaust. The present axially aligned multi-turbine mechanism avoids interference by birds and other outside objects due to its inherent structural visibility.
Owner:KNUTSON ROGER C
System and Method for Creating a Networked Infrastructure Distribution Platform of Small Wind Energy Gathering Devices
A roadway system for energy generation and distribution is presented. In accordance with one embodiment of the invention, the roadway system comprises a plurality of ground-based wind energy generating devices, one or more roads, and a roadway system electricity grid. The roadway system may additionally include, for example, a plurality of ground-based solar energy generating devices, one or more vehicle-based solar energy generating devices and one or more vehicle-based wind energy generating devices. The energy generating devices are connected to the roadway system electricity grid and substantially all of the ground-based wind energy generating devices are positioned on part of one of the roads or near to one or more of the roads to thereby allow energy generation from wind created from passing vehicles in addition to energy generation from atmospheric wind.
Owner:TAMIRAS PER PTE LTD LLC
Novel turbine and blades
InactiveUS20110027084A1Increase power generationReduce speedPropellersPump componentsSelf limitingRotational axis
A variable axis turbine may include multiple nested rotatable rotor assemblies. The turbine may be self-starting in slow fluid conditions while simultaneously self-limiting in fast fluid conditions. The turbine may provide omni-directional energy recovery and be self-balancing. The nested rotatable rotor assemblies may be configured to rotate independently of each other, but along the same rotational axis. Each outer nested rotor blade set may direct fluid onto the inner rotor blade sets in an aerodynamically beneficial manner. Each rotor blade set may be interconnected with a rotating generator hub that encloses a rotating generator element that rotates along with a corresponding rotor blade set for electric power generation. The blades may be “smart blades” that are sufficiently flexible to be self-configuring during rotation and soft enough to partially absorb sound. The blades may have a variable hardness and a two or more dimensional twist.
Owner:WARNER DAVID B
Vertical axis wind turbine and wind turbine blade
InactiveUS20070177970A1Improve lifting performanceImprove startup performanceWind motor controlMachines/enginesTurbine bladeVertical axis wind turbine
It is an object of the invention is to provide a vertical axis wind turbine and a wind turbine blade, which are excellent in self-starting performance and have a high torque constant. Since the present invention comprises a wind receiving plate 40 having a wind receiving surface and an openable and closable pivot 42, which wind receiving plate 40 is operated to close in the direction in which the centrifugal force is produced in proportion to the revolution of a blade 18 generating a lifting power, and an energizing means (such as spring 44) for energizing an opening force to open the wind receiving plate to the wind receiving side, the starting performance of the lift type wind turbine can be improved by means of the wind receiving plate 40, which opens at a low revolution of the blade 18 so as to function as a drag type wind turbine, and automatically closes at a high revolution of the blade 18 so as to function as a lift type wind turbine.
Owner:INTPROP BANK CORP (JP)
Method of making complex twisted blades with hollow airfoil cross section and the turbines based on such
InactiveUS7156609B2Improve efficiencyPropellersWind motor controlMachine shopManufacturing technology
Owner:GCK
Magnetic vertical axis wind turbine
InactiveUS20070098563A1Reduce frictionMaximize operation of systemOther chemical processesPump componentsElectricityAlternator
A lift and drag-based vertical axis wind turbine in which the vertical axis and foils mounted thereon are magnetically levitated above the turbine's base, thereby reducing friction within the system. The foils or vanes are three-dimensionally shaped about the vertical axis so as to resemble the billowed sail of a sailing ship and capture wind through 360 degrees of rotation under any wind condition. The system has an axial flux alternator using variable resistance coils which can be individually and selectively turned on or off depending on wind conditions and electrical draw requirements. The coils can also be used to produce mechanical drag on the system as desired to brake the turbine in high wind conditions or for maintenance. The system may be programmed to assess whether electricity generated by the system can be or should be transmitted to a public grid or stored locally on a chargeable battery system.
Owner:NIAGARA CENT RES
Wind power converting apparatus and method
InactiveUS20080085179A1High speedIncrease speedWind motor controlRenewable energy generationTurbineWind force
Owner:CALIFORNIA ENERGY & POWER
Vertical Axis Windmill And Wind Turbine System For Generating Electricity From Wind Energy
InactiveUS20080213083A1Dampen pivoting movementContinuous rotationPropellersWind motor controlElectricityTurbine
A lift-type wind turbine having a substantially vertical rotating shaft and a plurality of substantially vertical blades secured to the shaft. Each blade includes a front portion, a rear portion, and a pivot axis pivotally securing the rear and front portions. The rear portion pivots relative the front portion. The blades additionally include bottom and top edges positioned on each of the front portions. Each bottom edge is arranged substantially equidistant from the shaft proximate a first circumference extending substantially horizontally about the shaft, whereas each top edge is arranged substantially equidistant from the shaft proximate a second circumference extending substantially horizontally about the shaft. The blades are angled relative to the rotating shaft. The blades have an open, drag means position as well as a closed, lift means position, and passively switch between the positions based on wind speed for efficient rotation.
Owner:SEABELL INT CO LTD
Turbine apparatus and method
InactiveUS6929450B2Design economyRuggedly constructedPropellersWind motor controlTurbine bladeClam shell
A turbine system (10) for capturing energy from a fluid stream includes a torque arm (12). At least a pair of, preferably symmetrical clam shell, turbine blades (14) with the upper (16) and lower (18) halves are oppositely connected to the torque arm (12). A coordinating system (46) is connected to the symmetrical clam shell turbine blades (14). The coordinating system (46) further comprises a first system (48) and second system (52). The first system (48) is connected to control and regulate opening and closing of the upper (16) and lower (18) halves of each individual clam shell turbine blade (14). The second system (52) is connected between each pair of the symmetrical clam shell turbine blades (14) so that as one clam shell turbine blade (14) closes the opposite clam shell turbine blade (14) is forced open.
Owner:RENAISSANCE WIND SYST
Vertical axis wind turbine with articulating rotor
A VAWT wind engine includes a support structure, an articulating rotor mounted on the support structure for rotation about a vertically extending axis, and at least one airfoil on the rotor for rotor-powering purposes. The articulating rotor is mounted in a manner enabling tilting movement of the rotor during rotation so that the airfoil produces rotor rotation and rotor tilt as the airfoil orbits the rotational axis. At least one mechanical linkage is included to actively vary airfoil pitch according to rotor tilt. The partially articulating rotor of a teetering-rotor embodiment seesaws up and down about a horizontally extending pivotal axis. The fully articulating rotor of another embodiment supports three airfoils as it tilts in any direction by virtue of a gimbal or other rotor hub assembly providing a 360-degree swiveling action, while furling hinges help protect the airfoils against damaging winds during wind engine shutdown.
Owner:BOATNER BRUCE E
Vertical axis wind turbine
InactiveUS20080187432A1Wind motor controlRenewable energy generationLeading edgeVertical axis wind turbine
A vertical axis wind turbine having a plurality of blades spaced from a rotatable around a rotor shaft vertical to the ground. The plurality of blades are arranged in a helical pattern about the rotor shaft. Each blade is flexible to move in response to wind and has a top, bottom, leading edge, and trailing edge wherein the leading edge is in the shape of an airfoil. A hub having a plurality of blade attachment rods radially extending from the rotor wherein in one blade is secured to one of the attachment arms. The hub has a plurality of attachment rods radially extending from the rotor wherein one blade is secured to one of the attachment rods near the center and wherein the top of each blade is closer to the rotor than the bottom of each blade.
Owner:PREFERRED ENERGY
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