Plural Diverse Condition Responsive Patents (Class 416/36)
  • Patent number: 9541097
    Abstract: A fan assembly having a motor with a shaft. A hub member is mounted to the shaft so as to be rotated thereby. The hub member defines slots that receive arm members in the slots. The arm members are secured via bolts or other fasteners in the slots and can be replaced if broken or worn. Fan blades are positioned over or otherwise mounted to the arm members. The fan blades and the arm members can be contoured to engage with each other along the length of the arm members so that force is transmitted therebetween.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: January 10, 2017
    Assignee: Macroair Technologies, Inc.
    Inventor: Edward K. Boyd
  • Publication number: 20150147174
    Abstract: The present invention relates to methods, apparatus and computer program products for coordinating the control of a floating wind turbine (101) between a wind turbine controller (111) and a platform controller (110). One or more wind turbine control systems and/or one or more platform control systems may be altered based on 102 said coordinated control of said floating wind turbine (101).
    Type: Application
    Filed: January 9, 2013
    Publication date: May 28, 2015
    Applicant: MHI VESTAS OFFSHORE WIND A/S
    Inventors: Ian Couchman, Robert Bowyer
  • Publication number: 20150078895
    Abstract: The invention regards an apparatus or method for controlling the profile of a blade on a wind turbine having at least a first blade and a second blade, the first blade comprise at least one first sensor system adapted to determine a first blade state and the second blade comprise at least one second sensor system adapted to determine a second blade state, wherein the profile of the second blade is controlled based on the determined first blade state and the determined second blade state.
    Type: Application
    Filed: April 11, 2012
    Publication date: March 19, 2015
    Applicant: KK Wind Solutions A/S
    Inventor: Peter Fogh Odgaard
  • Patent number: 8939704
    Abstract: A method for operating a multistage compressor is provided. The method includes monitoring the pump limit, wherein at least a first measurement parameter measured during operation is compared to a reference parameter. The reference parameter is characteristic of reaching the surge limit or a specific distance of the operating point from the surge limit. A multistage compressor is also provided. In order to enlarge the operating range without risking safety, it is proposed that each stage to be monitored individually for the onset of the surge.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: January 27, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Georg Winkes
  • Publication number: 20140334927
    Abstract: The invention provides a shutdown controller for a wind turbine. To improve the estimation of a state of the wind turbine, the controller comprises at least two sensors being adapted to provide sensor data significant for different mechanical states in the wind turbine. The controller can provide an estimated state of the wind turbine based on the sensor data from the at least two sensors and compare the state of the wind turbine with a predefined detection limit to provide a shutdown signal if the estimated state is outside the detection limit.
    Type: Application
    Filed: November 21, 2012
    Publication date: November 13, 2014
    Applicant: VESTAS WIND SYSTEMS A/S
    Inventor: Keld Hammerum
  • Publication number: 20140193254
    Abstract: A method for optimizing the operation of a wind turbine having a rotor with at least one rotor blade, a tower, and a wind turbine controller, comprises determining a first load status of the wind turbine based on metereological data acquired by sensors, including a turbulence intensity; determining a second load status of the wind turbine based on mechanical loads on at least one wind turbine component; and increasing a load of the wind turbine, if the determined first and second load status of the turbine are within selectable load limits. A wind turbine implementing the method is also disclosed.
    Type: Application
    Filed: January 9, 2013
    Publication date: July 10, 2014
    Applicant: General Electric Company
    Inventors: Simi GOPOLAN, Anoop Singh
  • Patent number: 8764397
    Abstract: A rotor system is provided wherein coaxial, closely spaced multi-bladed rotors counter-rotate at extremely low RPMs while their pitches are controlled to account for wind gusts and velocity conditions, thereby eliminating many of the deficiencies of conventional helicopters. The embodiments can dramatically decrease the power required to lift a given quantity of weight, even beyond the level required by a typical airplane.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: July 1, 2014
    Inventor: Michael Brian Wittig
  • Patent number: 8764393
    Abstract: A method for operating a wind power plant (WEA) before or during the performance of maintenance work on the wind power plant (WEA). At least one physical condition of the surroundings outside the wind power plant (WEA) induced by wind movement outside the wind power plant (WEA) is detected as an external physical condition. At least one physical condition of a component of the wind power plant (WEA) influenced by wind movement outside the wind power plant (WEA) is detected as an internal physical condition. The at least one external physical condition and/or at least one internal physical condition are evaluated. The at least one external physical condition is compared with a predetermined reference value for the external physical condition. The at least one internal physical condition is compared with a predetermined reference value for the internal physical condition. Depending on the comparison, at least one warning message is generated.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: July 1, 2014
    Assignee: Senvion SE
    Inventors: Martin Von Mutius, Jens Altemark, Alf Trede
  • Publication number: 20140178195
    Abstract: A method and system for shutting down a wind turbine is presented. The method includes determining one or more pitch positions for one or more rotor blades of the wind turbine such that a sum of potential energy and kinetic energy in the wind turbine is minimized. The method further includes pitching the one or more rotor blades from an operating position to the determined pitch positions.
    Type: Application
    Filed: December 24, 2012
    Publication date: June 26, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rogier Sebastiaan Blom, Rosa Castañé Selga, Matthijs Leonardus Gerardus Boerlage
  • Patent number: 8568096
    Abstract: The present invention relates to a control and regulation method for a rotorcraft having at least one variable-pitch propulsive propeller driven by at least one power source, said method consisting in generating at least one mean pitch setpoint ?tcl* for the propeller(s) as a function of a thrust variation control order Tcl, wherein the method consists in defining a plurality of operating modes, including: a direct mode in which the value of the mean pitch value is a direct result of the control order Tcl; a forced mode in which the mean pitch is automatically forced to a calculated pitch value; a regulated mode in which the power of the propulsive propeller(s) is regulated as a function of a power setpoint from a pilot and of servo-controlling the mean pitch of the propeller(s); and a protected mode.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: October 29, 2013
    Assignee: Eurocopter
    Inventor: Paul Eglin
  • Patent number: 8529206
    Abstract: There is provided a yaw rotation control method for a wind turbine generator that does not require a yaw motor and is advantageous for a reduction in cost and a reduction in size and weight of a nacelle. A control unit performs, according to a deviation between wind direction information (?w) obtained from a wind direction detecting unit and a present state yaw angle (?z) obtained from a yaw rotating position detecting unit, yaw rotation control for outputting pitch angle command values (?1, ?2, and ?3) of yaw rotation to a pitch driving unit and directing front surfaces of rotation surfaces of wind turbine blades at the time of start. This yaw rotation control includes a step of controlling pitch angels of the wind turbine blades at a predetermined azimuth angle.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: September 10, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Tomohiro Numajiri
  • Patent number: 8527247
    Abstract: A computer-implemented method of determining the pitch stability of an airfoil system, comprising using a computer to numerically integrate a differential equation of motion that includes terms describing PID controller action. In one model, the differential equation characterizes the time-dependent response of the airfoil's pitch angle, ?. The computer model calculates limit-cycles of the model, which represent the stability boundaries of the airfoil system. Once the stability boundary is known, feedback control can be implemented, by using, for example, a PID controller to control a feedback actuator. The method allows the PID controller gain constants, KI, Kp, and Kd, to be optimized. This permits operation closer to the stability boundaries, while preventing the physical apparatus from unintentionally crossing the stability boundaries. Operating closer to the stability boundaries permits greater power efficiencies to be extracted from the airfoil system.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: September 3, 2013
    Assignee: Sandia Corporation
    Inventors: David G. Wilson, Rush D. Robinett, III
  • Patent number: 8517663
    Abstract: A cooling system for a turbine engine, as well as a methodology for controlling the cooling system, is described. A valve member is disposed between a cooling fluid passage and a wheel space of the turbine engine and operates to admit cooling fluid to the wheel space for cooling thereof. The valve assembly is responsive to a condition in the wheel space and varies the flow of additional cooling fluid to the wheel space based on that condition.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: August 27, 2013
    Assignee: General Electric Company
    Inventors: Rex Allen Morgan, Michael Alan Davi, Clement Gazzillo, Harold Lamar Jordan, Jr.
  • Publication number: 20130195653
    Abstract: There are provided a TMD adjusted to damp vibration in a natural frequency of a wind turbine, an AVC adjusted to damp vibration in a variable frequency of turbulent wind flowing into the wind turbine and/or a frequency of a rotation speed of a wind-turbine blade, and a pitch-angle control portion provided with a correction portion which adjusts a damping frequency of the AVC. The AVC is configured to obtain the damping force by changing the pitch angle of the wind-turbine blade.
    Type: Application
    Filed: January 30, 2012
    Publication date: August 1, 2013
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kentaro HAYASHI, Naoyuki NAGAI, Tsuyoshi WAKASA
  • Patent number: 8491262
    Abstract: A method for shutdown of a wind turbine having one or more wind turbine blades includes detecting an operational condition of the wind turbine that calls for an expedited or emergency shutdown of the wind turbine by a manner other than normal pitch control shutdown. Upon detection of the operational condition, one or more air brake flaps configured on each of the turbine blades is deployed by removing power to a fail-safe actuator operatively coupled to each of the air brake flaps. The fail-safe actuator is configured to hold the respective air brake flap at a retracted position relative to a suction side of the turbine blade in a powered state of the fail-safe actuator and to release the air brake flap for automatic deployment to an open position upon loss of power to the fail-safe actuator.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: July 23, 2013
    Assignee: General Electric Company
    Inventors: Edward Lee McGrath, Robert William Ridgway
  • Patent number: 8478449
    Abstract: A method of controlling the operation of a variable speed wind turbine (11), tracking a power curve (25, 27) including a nominal operational region (3 ) and sub-nominal operational regions (2, 1, 0), comprising steps of: a) implementing a control strategy to follow said power curve in said nominal operational region (3) based on the use of demanded torque Td for controlling power P and on the use of demanded pitch ?d for controlling demanded torque Td; b) implementing a control strategy to follow said power curve in sub-nominal operational regions (2, 1, 0) based on the use of demanded torque Td for controlling power P and on the setting of a constant optimum value for demanded pitch ?d in each sub-nominal operational region (2, 1, 0). The invention also refers to a control system comprising one or more Adaptive Predictive Controllers (51, 53, 55, 59).
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: July 2, 2013
    Assignee: Gamesa Innovation & Technology, S.L.
    Inventor: Octavio Hernandez Mascarell
  • Publication number: 20130156576
    Abstract: Methods and apparatus for monitoring air cooling fans including, by way of non-limiting examples, the determination of an upper and lower boundary limit of acceptable fan operation, sends a control signal to a fan being monitored, measures the fan rotation rate or fan power consumption subsequent to sending the control signal; and issues an alarm if the measured fan rotation rate is above the upper boundary limit or below the lower boundary limit.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 20, 2013
    Inventors: Dewight L. Warren, Neil D. Longgood, Kerry D. Lacanette
  • Publication number: 20130052011
    Abstract: An advanced warning system for a turbine, the system comprising: one or more near-field and far-field sensors locatable remotely from the turbine and upstream of the turbine; a communication link between the turbine and the one or more near-field and far-field sensors for transmitting data from the one or more near-field and far-field sensors to the turbine; and a controller for adjusting operational settings of the turbine, wherein, in use, the controller adjusts the operational settings as a function of the received data from the one or more near-field and far-field sensors.
    Type: Application
    Filed: April 7, 2011
    Publication date: February 28, 2013
    Applicant: ROLLS-ROYCE PLC
    Inventor: Gawain C R Badcock
  • Patent number: 8317471
    Abstract: A method for preventing a possible overspeed of a wind turbine rotor with at least one rotor blade is provided. The method includes detecting a yaw misalignment of the rotor, and imposing a restriction on changes of a pitch angle towards a feathered position of the at least one rotor blade after detecting the yaw misalignment. Further, a wind turbine having a rotor and a control system configured to prevent a possible overspeed of the rotor is provided.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: November 27, 2012
    Assignee: General Electric Company
    Inventors: Ulf Axelsson, Christian Haag, Mikael Björk, Jacob Johannes Nies
  • Patent number: 8240991
    Abstract: A method, system and computer program product for operating a wind turbine is disclosed. For operating the wind turbine a set of operational data points are sensed via a sensing module. The set of operational data points may include bending stress values. Based on the bending stress values, a load scenario indicator value may be computed. Further, based on the set of operational data points a loading threshold value may be obtained. At least one operating parameter of the wind turbine is changed if the load scenario indicator value exceeds the loading threshold.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: August 14, 2012
    Assignee: General Electric Company
    Inventors: Matthijs Leonardus Gerardus Boerlage, Leonardo Cesar Kammer
  • Patent number: 8123476
    Abstract: A method of operating installations (10), in particular wind energy installations (10), having a component (22) which endangers flying animals, in which the component assumes a first state which endangers animals to a greater extent and a second state which endangers animals to a lesser extent. The physical environment around the installation (10), in particular the environment around the component (22), is monitored at least in regions by a suitable detection device. The detection device produces a signal when an animal of a specific type, in particular a bat, a bird or the like, enters the monitored region, and in which case the component of the installation is moved from the state which endangers animals to a greater extent to the state which endangers animals to a lesser extent depending on the signal.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: February 28, 2012
    Assignee: Daubner & Stommel GBR Bau-Werk-Planung
    Inventor: Matthias Stommel
  • Patent number: 8116914
    Abstract: A pitch controller, uninterruptible power supply, and rotational speed detector are disposed in the rotor in a wind turbine. When a slip ring failure or wire breakage occurs, the pitch controller internally creates a pitch angle command so as to control the pitch angle.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: February 14, 2012
    Assignees: Hitachi, Ltd., Fuji Heavy Industries Ltd.
    Inventors: Shinya Oohara, Masaya Ichinose, Motoo Futami, Kazuya Tsutsumi, Takashi Shiraishi, Shigeo Yoshida, Hajime Komiyama, Junichi Sugino
  • Patent number: 8100647
    Abstract: A method for operating a wind turbine having a rotor with a number of wind turbine blades, wherein the rotor's axis of rotation is tilted in relation to the direction of the incoming wind, includes the steps of determining the azimuth angle (A) of the blades and adjusting the pitch angle of the blades in accordance with the azimuth angle (A) to ensure a substantially constant angle of attack (AoA) during at least a full rotation of the rotor. A wind turbine and use of the method are also contemplated.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: January 24, 2012
    Assignee: Vestas Wind Systems A/S
    Inventors: Kristian Balschmidt Godsk, Thomas Steiniche Bjertrup Nielsen, Erik Billeskov Sloth
  • Patent number: 8066480
    Abstract: A high volume low speed (HVLS) fan provides improved air circulation and thermal control in a building by incorporating composite fan blades pivotable to both positive and negative pitch angles. The blades are molded of polymer material over a metal tube core for strength and ease of attachment to the fan hub, and have a symmetrical airfoil shape to produce an efficient bi-directional conical airflow. The fan includes a control unit providing manual and automated intelligent control over blade angle and rotational speed, as well as startup with approximately zero blade angle for more economical power consumption and less motor wear. The fan structure and mounting system allows the fan to be installed at an optimal height inside a variety of buildings to provide increased efficiency of air destratification and air mixing. An array of multiple HVLS fans with alternating directions of airflow can further increase efficiency of air movement.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: November 29, 2011
    Assignee: AirMotion Sciences, Inc.
    Inventor: Joe E Madsen
  • Patent number: 8052388
    Abstract: Gas turbine engine systems involving mechanically alterable vane throat areas are provided. In this regard, a representative vane for a gas turbine engine includes: a leading edge; a trailing edge; a suction side surface extending between the leading edge and the trailing edge; a cavity having an aperture located in the suction side surface; and a barrel located within the cavity and being moveable therein such that movement of the barrel alters an extent to which the barrel protrudes through the aperture.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: November 8, 2011
    Assignee: United Technologies Corporation
    Inventors: Michael G McCaffrey, Shankar S Magge, Joel H Wagner, Daniel R Sabatino, Joseph Clayton Burge
  • Patent number: 8021111
    Abstract: A method for operating a wind turbine having a rotor with a number of wind turbine blades, wherein the rotor's axis of rotation is tilted in relation to the direction of the incoming wind, includes the steps of determining the azimuth angle (A) of the blades and adjusting the pitch angle of the blades in accordance with the azimuth angle (A) to ensure a substantially constant angle of attack (AoA) during at least a full rotation of the rotor. A wind turbine and use of the method are also contemplated.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: September 20, 2011
    Assignee: Vestas Wind Systems A/S
    Inventors: Kristian Balschmidt Godsk, Thomas Steiniche Bjertrup Nielsen, Erik Billeskov Sloth
  • Publication number: 20110142632
    Abstract: In one embodiment, a hydraulic circuit has an input shaft, at least one positive displacement hydraulic pump, a plurality of positive displacement hydraulic motors, and at least one fluid line operatively connecting the at least one positive displacement hydraulic pump to the positive displacement hydraulic motors. In operation, the at least one positive displacement hydraulic pump is placed in an operative condition. At least one of the positive displacement hydraulic motors is also placed in an operative condition. A flow rate of fluid in the fluid line is measured, and the remaining positive displacement hydraulic motors are switched between an operative condition and a bypass condition according to the measured flow rate of the fluid.
    Type: Application
    Filed: December 16, 2009
    Publication date: June 16, 2011
    Applicant: Eaton Corporation
    Inventors: Thomas J. Stoltz, G. Clark Fortune, Mihai Dorobantu
  • Publication number: 20110123331
    Abstract: A method for controlling an operation of a wind turbine with at least one structural component is provided. A fatigue life time consumption of the structural component is scheduled. A current velocity of a wind which is driving the wind turbine is determined. A current set point value for the fatigue life time consumption of the structural component based on the scheduled fatigue life time consumption of the structural component is specified and a maximum set point value for the fatigue life time consumption of the structural component based on the determined current wind velocity is specified. The wind turbine is operated depending on the specified current set point value and/or on the specified maximum set point value such that a mechanical load acting on the structural component is controlled. A machine load control system and a wind turbine are also provided.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 26, 2011
    Inventor: Henrik Stiesdal
  • Publication number: 20110040413
    Abstract: A method of controlling at least one wind turbine blade during the stopping process of the rotor in a wind turbine system is disclosed. The method optimizes the control velocity of the process in response to one or more feedback values of the system and/or one or more feedback values from the surroundings of the system by altering the angular pitch velocity from 10°/sec during the initial stage of the stopping process to 5°/sec at the final stage of the stopping process. A control system and a wind turbine as well as use hereof are also disclosed.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 17, 2011
    Inventors: Ole Mølgaard Jeppesen, John Bengtson, Torben Møller Hansen
  • Publication number: 20100322766
    Abstract: A method for optimizing energy production in a wind turbine includes pitching a plurality of rotor blades to a full operational angle, and utilizing an active flow control device in accordance with a generator speed and a rotor blade pitch setting to facilitate maintaining a predetermined generator rated power level.
    Type: Application
    Filed: June 17, 2009
    Publication date: December 23, 2010
    Inventors: Wouter Haans, Lawrence D. Willey
  • Publication number: 20100215493
    Abstract: A wind turbine blade includes a blade body and lift-regulating mechanism adapted for movement in relation to the blade body by at least one actuation mechanism controlled by an actuation controller. The actuation controller controls a setting of the lift-regulating mechanism based on an input from a sensor, and the sensor is a force sensor adapted for sensing a force from a wind flow acting on the lift-regulating mechanism, whereby a wind turbine blade with fast-responding lift-regulating mechanism is provided.
    Type: Application
    Filed: April 29, 2010
    Publication date: August 26, 2010
    Inventors: Imad Abdallah, Jonas Romblad, Carsten Hein Westergaard, Chee Kang Lim
  • Patent number: 7748958
    Abstract: An airborne mobile platform generally includes a plurality of rotating rotor blades operating in an airflow that forms a boundary layer on each of the rotor blades. At least one of the rotor blades includes a section that encounters the airflow that includes an unsteady subsonic airflow having at least a varying angle of attack. At least one of the rotor blades also includes one or more vortex generators on the at least one of the rotor blades that generate a vortex that interacts with the boundary layer to at least delay an onset of separation of the boundary layer, to increase a value of an unsteady maximum lift coefficient and to reduce a value of an unsteady pitching moment coefficient for the section.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: July 6, 2010
    Assignee: The Boeing Company
    Inventors: Michael A. McVeigh, Robert F. Maciolek
  • Publication number: 20100135798
    Abstract: A method and system for providing noise control for a wind turbine system are disclosed. The method can include providing a wind turbine system comprising at least one blade operably mounted on the wind turbine and a controller, determining an external condition with at least one sensor, receiving a noise control signal related to the external condition, and adjusting an operating parameter in response to receiving the noise control signal related to the external condition.
    Type: Application
    Filed: February 10, 2009
    Publication date: June 3, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Eric Eggleston
  • Publication number: 20100098541
    Abstract: A method of operating a wind turbine generator having at least one wind turbine blade includes increasing a pitch angle of the at least one wind turbine blade as the at least one wind turbine blade rotates through a first range of blade azimuth values. Such increasing of the pitch angle reduces acoustic emissions generated by the wind turbine generator. The method also includes decreasing the pitch angle of the at least one wind turbine blade as the at least one wind turbine blade rotates through a second range of blade azimuth values. Such decreasing of the pitch angle increases electric power generated by the wind turbine generator.
    Type: Application
    Filed: October 20, 2008
    Publication date: April 22, 2010
    Inventors: Pedro L. Benito, Jing Wang
  • Publication number: 20100098540
    Abstract: A method for operating a wind turbine. The method includes providing a wind turbine having at least one blade having adjustable pitch angle that is adjusted according to an operational parameter schedule. A blade efficiency parameter is determined in response to a wind speed and a rotor speed. A minimum pitch angle is determined in response to the blade efficiency parameter and the pitch angle of the at least one blade in response to the blade efficiency parameter is maintained to an angle equal to or greater than the minimum pitch angle independent of the operational parameter schedule. A wind turbine plant and a method for servicing a wind turbine are also disclosed.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 22, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Thomas Frank Fric, Kevin Standish, Kirk Gee Pierce, Bernard Landa
  • Patent number: 7677869
    Abstract: A predictive maintenance system for wind parks, the wind park comprising a group of wind turbines (Ai), a communications network (RS), and a supervision and control system (ST). The predictive maintenance system comprises a monitoring and processing equipment (SMP) connected to the control system (PLC) of the wind turbine (Ai), such that the monitoring and processing equipment sends alarms through the control system of the wind turbine to the supervision and control system. A monitoring and processing equipment (SMP) for wind turbines is also disclosed.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: March 16, 2010
    Assignee: Gamesa Innovation & Technology, S.L.
    Inventors: Maria Jose Martinez De Lizarduy Romo, Jose Ignacio Llorente Gonzalez
  • Publication number: 20100040468
    Abstract: A method of operating a wind turbine above a predefined wind velocity comprising the step of operating a control parameter of the wind turbine within a tolerance band from a reference set-point curve of that control parameter. A wind turbine and a cluster of wind turbines is also contemplated.
    Type: Application
    Filed: October 23, 2009
    Publication date: February 18, 2010
    Inventors: Brian W. Andersen, Erik Carl Miranda
  • Publication number: 20090317250
    Abstract: A turbine for use with a turbine generator, the turbine including at least one turbine blade for positioning in a flowpath, a hub mounting the at least one turbine blade, and a rotatable shaft in operational communication with the hub via a hinge assembly, an axis of the hub being independent of an axis of the shaft. The hinge assembly is disposed between the shaft and the hub and configured to adjust an angle therebetween. A controller assembly is configured to adjust at least one operational characteristic of the hinge assembly during turbine operation. In one embodiment the operational characteristic is a teeter angle of the hinge assembly. In one embodiment operational characteristic is a stiffness or damping force. Methods for using and controlling a fluid turbine are also disclosed.
    Type: Application
    Filed: March 24, 2009
    Publication date: December 24, 2009
    Applicant: NORDIC WINDPOWER
    Inventors: Charles R. GAMBLE, Steve Taber
  • Patent number: 7631632
    Abstract: The orbital engine or pump comprising of drive train, having several elliptical gears each rotating around focal point with focal distance defined as function of minimum vanes opening, and toroidal cylinders each having inside two impellers with radial vanes continuously rotating with oscillation through a series of identical elliptical gears with one gear on each impeller shaft and second gears in mesh located on input/output shaft out of phase allowing synchronization of cycles performed in each chamber inside toroidal cylinders positioned planetary to input/output shaft. Some of the chambers could be selectively allocated to perform suction, compression, vacuum and combustion with air, gas, steam and liquid media through efficient internal rotary valves attached to impellers or housing and in most cases, eliminating the need for external valving.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: December 15, 2009
    Inventor: Anatoly Arov
  • Publication number: 20090295160
    Abstract: A method for operating a wind turbine. The method includes providing a wind turbine having a variable speed control system, the control system having an initial rotational speed set point. At least two operational parameters are obtained from one or more sensors. An adjusted rotational speed set point greater than the initial rotational speed set point is determined in response to the operational parameter. The control system is configured with the adjusted rotational speed set point. A wind turbine and wind turbine plant are also disclosed.
    Type: Application
    Filed: May 29, 2008
    Publication date: December 3, 2009
    Applicant: GE WIND ENERGY GMBH
    Inventors: Lothar WITTEKIND, Renjith VIRIPULLAN, Martin STAEDLER
  • Publication number: 20090232653
    Abstract: A paddlewheel apparatus including a paddlewheel axle, first and second spaced apart annular wheel hubs locked in rotation with the axle, and a plurality of elongated tri-curved paddles cooperatively supported by the first and second wheel hubs and arranged around the circumference of the first and second annular wheel hubs and spaced apart from the paddlewheel axle. A method for creating current in a bio-pond raceway.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 17, 2009
    Inventor: Robert Vitale
  • Publication number: 20090232635
    Abstract: A wireless sensing device for use in a wind turbine having a sensor capable of measuring one or more parameters for wind turbine operation. The sensing device also include a transmission device capable of wirelessly transmitting one or more signals corresponding to the one or more measured parameters to a controller. An independent power source is included to power the transmission device and the sensor. A method for system for operating and monitoring wind turbine operation are also disclosed.
    Type: Application
    Filed: March 12, 2008
    Publication date: September 17, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Detlef MENKE
  • Publication number: 20090220340
    Abstract: The present invention relates to a method of controlling the aerodynamic load of a wind turbine blade by controlling the tip speed ratio (TSR) and/or blade pitch setting of the wind turbine blade so as to optimize power production. A wind turbine blade undergoes an aero-elastic response including deflection and twist that is a function of the blade loading. The blade loading is dependent on the wind speed, TSR, and pitch setting. The aero-elastic response requires a different TSR and/or pitch to be selected throughout the power curve in order to maintain the optimum power production and to improve energy capture.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 3, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Kirk Gee PIERCE, Brandon Shane GERBER, Stefan HERR
  • Publication number: 20090123284
    Abstract: A high volume low speed (HVLS) fan provides improved air circulation and thermal control in a building by incorporating composite fan blades pivotable to both positive and negative pitch angles. The blades are molded of polymer material over a metal tube core for strength and ease of attachment to the fan hub, and have a symmetrical airfoil shape to produce an efficient bi-directional conical airflow. The fan includes a control unit providing manual and automated intelligent control over blade angle and rotational speed, as well as startup with approximately zero blade angle for more economical power consumption and less motor wear. The fan structure and mounting system allows the fan to be installed at an optimal height inside a variety of buildings to provide increased efficiency of air destratification and air mixing. An array of multiple HVLS fans with alternating directions of airflow can further increase efficiency of air movement.
    Type: Application
    Filed: November 7, 2008
    Publication date: May 14, 2009
    Inventor: Joe E. Madsen
  • Publication number: 20090035133
    Abstract: A method of using a delta shaped blade as an aircraft propeller, helicopter or autogiro rotor, or wind turbine propeller is presented. The invention combines the delta blade system with the use of torsion bars to achieve desirable control of blade twist. The invention uses blade twist to control the air loading on the craft; hence better control of maneuvering is achieved. The invention also optionally includes adjustable blade roots such that the sweep and aspect ratio of the delta blade is controllably variable. Compared to traditional propeller blade configurations, the invention boasts improved performance and enhanced aeroelastic properties. The invention is a far more efficient system providing economic advantages, higher speeds, and more durable designs.
    Type: Application
    Filed: July 28, 2008
    Publication date: February 5, 2009
    Inventor: Marty Allen Ferman
  • Publication number: 20090035136
    Abstract: A method for balancing a rotor of a rotary machine, wherein the rotor includes at least two rotor blades and a rotor shaft, includes receiving at least one measurement of either a load, an acceleration, or a displacement that pertains to at least one bending moment acting on the rotor shaft, determining at least one value of the at least one bending moment acting on the rotor shaft based, at least in part, on the received at least one measurement, and determining a pitch offset angle value of at least one rotor blade that facilitates reducing the at least one bending moment acting on the rotor shaft.
    Type: Application
    Filed: October 10, 2008
    Publication date: February 5, 2009
    Applicant: General Electric Company
    Inventors: Kirk Gee Pierce, Robert Peter Slack
  • Publication number: 20080252076
    Abstract: The invention relates to a wind turbine with a rotor, a generator driven by it, which generates electrical power and delivers it to a power system, and a control unit which controls the operation of the plant and has a reactive-power control module. According to the invention, it is provided that the control unit has a determining device for a safe minimum active power. Furthermore, it comprises a limiting device for the reactive-power control module, in such a manner that the reactive power is limited to such a measure that the safe minimum active power is still available, taking into consideration the available apparent power. As a result, the total current generated, apart from the active current required for the safe operation of the plant, can be fed into the power system as reactive current as backup in the case of a voltage drop. The invention is also related to a corresponding method.
    Type: Application
    Filed: September 27, 2004
    Publication date: October 16, 2008
    Inventors: Jens Fortmann, Heinz-Hermann Letas
  • Patent number: 7296969
    Abstract: A pitch change system includes a yoke assembly which receives a pitch trunnion that extends from each propeller blade assembly. Each pitch trunnion is received within a respective bearing assembly mounted in the yoke assembly. The bearing assemblies are mounted between a forward yoke plate and an aft yoke plate. A spacer is mounted between each adjacent bearing assembly to position and restrain each bearing assembly. Each spacer includes an extension which retains the adjacent bearing assembly on a pitch trunnion pin in a direction generally parallel to axis. Each of the bearing assemblies includes a generally rectilinear outer race and a spherical inner race inside diameter to receive the pitch trunnion pin. The rectilinear outer race reduces contact stresses to acceptable levels for high load applications yet permits blade installation without actuator disassembly.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: November 20, 2007
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Mark R. Raes, Paul A. Carvalho
  • Patent number: 7175389
    Abstract: A method for reducing peak loads of wind turbines in a changing wind environment includes measuring or estimating an instantaneous wind speed and direction at the wind turbine and determining a yaw error of the wind turbine relative to the measured instantaneous wind direction. The method further includes comparing the yaw error to a yaw error trigger that has different values at different wind speeds and shutting down the wind turbine when the yaw error exceeds the yaw error trigger corresponding to the measured or estimated instantaneous wind speed.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: February 13, 2007
    Assignee: General Electric Company
    Inventor: Emilian Mieczyslaw Moroz
  • Patent number: 6837681
    Abstract: Wind power installations using more modern technology have long been known. Such wind power installations have rotors comprising at least one or more rotor blades. The rotors and accordingly the rotor blades carried thereby of wind power installations are subjected to a particular degree to the ambient environmental influences such as for example rain, snow, hail or also insects. In particular the leading edges of the rotor blades are heavily loaded in that respect. In that situation it can happen that the rotor blades and in particular the leading edges thereof, after some time, suffer from (mechanical) damage, for which cost-intensive repair is necessary, especially as a crane is frequently required for that purpose and the entire wind power installation is also stopped for a prolonged period due to the repair and under some circumstances even individual rotor blades have to be transported away to the repair location.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: January 4, 2005
    Inventor: Aloys Wobben