Control Of Drive Brake Or Clutch Patents (Class 416/32)
  • Patent number: 11125167
    Abstract: A fan drive gear system for a gas turbine engine includes a gear system that provides a speed reduction between a fan drive turbine and a fan and a mount flexibly supporting portions of the gear system. A lubrication system supporting the fan drive gear system provides lubricant to the gear system and removes thermal energy produced by the gear system. The lubrication system includes a capacity for removing thermal energy equal to less than about 2% of power input into the gear system.
    Type: Grant
    Filed: March 4, 2019
    Date of Patent: September 21, 2021
    Assignee: Raytheon Technologies Corporation
    Inventor: William G. Sheridan
  • Patent number: 10994836
    Abstract: Aerial vehicles are equipped with propellers having clutch mechanisms that contract around a shaft when the propellers are not rotating, or are rotating at low angular velocities, and expand around the shaft when the propellers are rotating at sufficiently high angular velocities. The clutch mechanisms surround one or more fixed posts within an opening or window defined therein. When the clutch mechanisms contract into a closed position, components of the clutch mechanisms come into contact with the posts, and the propellers are forced to remain in an alignment defined by the posts. When the clutch mechanisms expand into an open position, such components may rotate freely without contacting the posts. The clutch mechanisms cause propellers to remain aligned in desired orientations when the propellers are not required for operation, thereby reducing drag or adverse acoustic effects.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: May 4, 2021
    Assignee: Amazon Technologies, Inc.
    Inventor: Dominic Timothy Shiosaki
  • Patent number: 10890219
    Abstract: A fan system is disclosed that includes a braking mechanism for physically stopping rotation of a fan rotor. The braking mechanism is activated when the fan system is at least partially removed from a chassis or enclosure or when the chassis or enclosure including the fan system is opened. The fan rotor, of the fan system, may include a rotating blade assembly configured to rotate around an axis. A fan motor, of the fan system, is configured to cause rotation of the rotating blade assembly around the axis. The braking mechanism, of the fan system, is configured to apply friction to at least one component of the fan rotor when the braking mechanism is engaged. Application of friction to the at least one component of the fan rotor may stop rotation of the rotating blade assembly around the axis.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: January 12, 2021
    Assignee: Oracle International Corporation
    Inventor: Eric Munro Innes
  • Patent number: 10861656
    Abstract: A spring-loaded drive for a high-voltage power switch contains at least one spring and at least one tensioning motor for the at least one spring. The spring-loaded drive contains at least one rectifier circuit, which is formed by a plurality of diodes where precisely one diode is connected in series to the tensioning motor.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: December 8, 2020
    Assignee: Siemens Aktiengesellschaft
    Inventor: Thomas Hilker
  • Patent number: 10801468
    Abstract: The invention relates to a pitch bearing, a blade, an impeller of a wind turbine and to a connecting method for the wind turbine. There is provided a pitch bearing of a wind turbine comprising: an inner bearing ring, an outer bearing ring and an extension portion, wherein one of the inner bearing ring and the outer bearing ring is connected to the extension portion. With the pitch bearing, blade, impeller of the wind turbine and the connecting method for the wind turbine according to the disclosure, it is possible to connect the blade to the pitch bearing without bolts, allow a lower weight for the wind turbine, increase strength and fatigue life of the wind turbine, and allow a lower manufacturing cost and difficulty for the wind turbine.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: October 13, 2020
    Assignee: BEIJING GOLDWING SCIENCE & CREATION WINDPOWER EQUIPMENT CO., LTD.
    Inventor: Arsenii Khvyiuzov
  • Patent number: 9982657
    Abstract: The present invention provides a wind-directly-driven oil pumping machine, comprising an electric motor (1) and a control device (14), and further comprising a rotary spindle (2), a blade (3), a lifting roller (4), a roller driving wheel (6), an energy adjustment flywheel (7), a generator (10), a transmission (8) and an energy feedback device (9). The blade (3) is fixedly connected to the rotary spindle (2). The lifting roller (4) is used for raising and lowering a sucker rod. The lifting roller (4) sleeves the rotary spindle (2). Clutches (5) are disposed between the rotary spindle (2) and the lifting roller (4). The clutches (5) are used for separating or joining the rotary spindle (2) and the lifting roller (4). The roller driving wheel (6) and the lifting roller (4) are fixedly connected to form a whole.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: May 29, 2018
    Inventor: Yongan Qiu
  • Patent number: 9605557
    Abstract: A variable bypass turbofan engine includes a bypass fan having a plurality of bypass fan blades mated to a first low pressure shaft segment. A second low pressure shaft segment includes a low pressure compressor and a low pressure turbine mated thereto. The engine also includes a clutch coupled between the first low pressure shaft segment and the second low pressure shaft segment and is configured to selectively couple and decouple the first low pressure shaft segment from the second low pressure shaft segment. A brake is configured to selectively halt or oppose rotation of the first low pressure shaft segment or the bypass fan.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: March 28, 2017
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: August J Rolling
  • Patent number: 9267561
    Abstract: According to one embodiment, a rotor brake control system includes a temperature sensor operable to measure an operating temperature of a rotor brake and a rotor brake control unit operable to instruct a caliper to adjust, based on the measured operating temperature, an amount of friction generated between a brake pad and the rotor brake.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: February 23, 2016
    Assignee: Bell Helicopter Textron Inc.
    Inventor: Gary S. Conway
  • Patent number: 9194333
    Abstract: The invention relates to a field of feeding reaction engines, and in particular a turbopump 9 for feeding at least one combustion chamber 2 with a first propellant, the turbopump comprising a pump 9a, a turbine 9b to the pump 9a in order to drive it, and a variable and/or disengageable braking device 11.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: November 24, 2015
    Assignee: SNECMA
    Inventors: Gaelle Le Bouar, Richard Petit
  • Patent number: 9188130
    Abstract: A locking device is provided for a cooling fan assembly. The assembly includes a central hub. A plurality of blades are operatively connected to and configured to selectively rotate around the central hub. A blade ring is fixedly connected to respective outermost radial portions of the plurality of blades. The blade ring may be annularly-shaped and defines at least one blade ring slot. The locking device is configured to selectively prevent the plurality of blades from rotating. The locking device includes a movable member and an actuation device for moving the movable member. The movable member is slidable relative to the blade ring between two positions, an unlocked position that substantially permits the plurality of blades to rotate and a locked position that substantially prevents the plurality of blades from rotating.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: November 17, 2015
    Assignee: GM Global Technology Operations LLC
    Inventor: Donnell B. Johnson
  • Patent number: 9121385
    Abstract: A wind turbine includes at least one wind turbine blade assembly. The blade assembly includes a blade and a pitch bearing arranged between the blade and a hub of the wind turbine, the blade assembly further including two or more hydraulic pitch cylinders for pitching the blade in relation to the hub. The two or more hydraulic pitch cylinders are arranged to expand in the same angular direction around the rotational axis of the pitch bearing. A method for pitching a blade of a wind turbine includes connecting a first end of the hydraulic pitch cylinders directly or indirectly to the hub; connecting a second end of the hydraulic pitch cylinders directly or indirectly to the blade; and expanding or contracting the hydraulic pitch cylinders in the same angular direction in relation to the rotational axis of the pitch bearing.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: September 1, 2015
    Assignee: Vestas Wind Systems A/S
    Inventors: Jesper Lykkegaard Andersen, Jens Bay Madsen
  • Publication number: 20140219796
    Abstract: A wind turbine control system comprising a thrust sensor and a braking system. The system allows an increase in wind speed to be detected instantaneously and corrective action to be initiated. The system comprises additional features such as deceleration control.
    Type: Application
    Filed: May 25, 2012
    Publication date: August 7, 2014
    Applicant: CONDOR WIND ENERGY LIMITED
    Inventors: Silvestro Caruso, Martin Jakubowski, Luciano Caioli
  • Patent number: 8757973
    Abstract: An adjusting device for adjusting the rotation angle position of the rotor of a wind energy system should be improved by the invention, whereby a complicated processing of the brake disc previously used for engagement of the drive is no longer necessary, and whereby said brake disc can be flexibly arranged in an area with sufficient construction space. For this purpose, the adjusting device has at least one force transducer wheel and/or a force transducing disc which is mounted or can be mounted on a shaft (1) of the drive train which is switched downstream from the rotor, which is structured for engagement of a force transmitting means, and is designed as an independent component. The device also has a drive means for producing a drive force, and at least one force transmission means for transmitting the drive force to the force transducer wheel and/or the force transducing disc.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: June 24, 2014
    Assignee: Kenersys GmbH
    Inventors: Michael Hüsken, Ulf Nosthoff, Ulrich Uphues, Markus Becker
  • Patent number: 8690526
    Abstract: This present invention relates to a hydroelectric turbine having a stator and a rotor within the stator on at least one set of bearings, the turbine having a brake which becomes operational following a predetermined level of bearing wear in order to avoid damage to the turbine.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: April 8, 2014
    Assignee: OpenHydro IP Limited
    Inventors: Paul Dunne, James Ives
  • Patent number: 8593006
    Abstract: A method for the oscillation damping of a drive train in a wind turbine is proposed. The drive train connects a rotor to a generator. Parameter values representing an oscillation of the drive train are calculated and, on the basis of the calculated parameter values, damping forces which counteract the oscillation of the drive train are exerted in a controlled manner on the drive train by a braking device.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: November 26, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventor: Matthias Wohlleb
  • Publication number: 20130230395
    Abstract: A blade speed control system is disclosed and applied to a generator and a blade. A control method of the blade speed control system includes: setting the blade speed control system to a first mode; detecting a voltage value and a current value of the generator by a processing unit; generating a modulated signal according to the voltage value and the current value by the processing unit; switching the blade speed control system to a second mode by the processing unit; and adjusting the current value according to the modulated signal by a control unit.
    Type: Application
    Filed: December 28, 2012
    Publication date: September 5, 2013
    Applicant: DELTA ELECTRONICS, INC.
    Inventors: Yun-Chi HUNG, Chih-Hung HSIAO, Cheng-Chieh CHAN, Hong-Ling CIOU, Yuan-Fang HUANG
  • 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: 8480363
    Abstract: A turbine with vanes and tethers that adjust to the wind includes: an axle, adapted to be positioned perpendicular to the airflow; a radial spar attached to the axle; a vane rotatably attached to the spar; and a positioning element to limit the vane from rotating substantially more than a perpendicular angle away from the spar. The device retains the vane in a position that utilizes the airflow to rotate the axle. The positioning element is a tether attached to the distal point of the vane.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: July 9, 2013
    Inventor: Thomas Mellus Fenaughty
  • Publication number: 20130078092
    Abstract: A method for controlling rotation speed of a vertical axis windmill by using rotating centrifugal force of blades comprises the steps of a. forming the rotor blades; b. rotation of the rotor blades; and c. lift control. A device for controlling rotation speed of the vertical axis windmill comprises a plate mounted on each of the rotor blades, then an elastic lift control device provides an elasticity to press the plate against the rotor blades, and the centrifugal force produced by the rotation of the vertical axis windmill counteracts the elasticity, so as to create an automatically adjustable, passively controlled and durable windmill.
    Type: Application
    Filed: September 15, 2012
    Publication date: March 28, 2013
    Inventors: Cheng-Keng CHEN, Ming-Guo CHEN
  • Publication number: 20130069369
    Abstract: Disclosed is a renewable energy extraction device and methods for producing renewable energy from flowing air or water. The renewable energy extraction device captures a relatively large amount of flowing water or atmospheric air and increases speed of the captured water or air by decreasing flow cross sectional area in the flow direction. An energy extraction component is used to extract energy of the high-speed water or air and convert it to rotational mechanical energy on a power shaft. A rotation direction control mechanism is used to make the power shaft always rotate in one direction, without coming to a stop, for ocean applications. The mechanical energy of the power shaft is transmitted to an electric generator, pump, compressor, or any other rotary equipment. After extraction of its energy, the captured air or water is released to its original source at a downstream location.
    Type: Application
    Filed: August 1, 2012
    Publication date: March 21, 2013
    Inventor: Karim Salehpoor
  • Patent number: 8319361
    Abstract: The invention relates to a device for monitoring a wind energy installation (1) comprising a tower (2) and a rotor provided with rotor blades (5) and arranged on the tower, in terms of a possible collision of a rotor blade (5) with the tower (2). Said device comprises at least one distance sensor (7a, 7b) which is arranged on the wind energy installation (1) and used for the non-contact measurement of the distance between the rotor blades (5) and a pre-determined point on the wind energy installation (1). The device also comprises an electronic evaluation system in which the distance data measured by the at least one distance sensor (7a, 7b) is evaluated, said system emitting a collision warning in the event of a critical distance not being reached.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: November 27, 2012
    Inventor: Christoph Lucks
  • Patent number: 8251639
    Abstract: A gas turbine includes at least one multi-stage compressor unit 2, with the compressor unit 2 including several, independent compressor modules 3-5, which, independently of each other, are rotatably borne on a drive shaft 1 and are each engageable with the drive shaft 1 by at least one clutch unit 9-11.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: August 28, 2012
    Assignee: Rolls-Royce Deutchland Ltd Co KG
    Inventor: Metin Talan
  • Patent number: 8214075
    Abstract: A method of modelling a flight of an aircraft using at least one computer system is disclosed. In one embodiment, the method includes: sourcing flight details from at least one data source using at least one data acquisition system, the flight details representative of the activity of the aircraft within a flight information region, and compiling a flight model from the flight details using a processing system, the flight model indicating the activity of the aircraft over the duration of the flight in two or more FIRs or for an entire flight undertaken in a single FIR.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 3, 2012
    Assignee: Airways Corporation of New Zealand Limited
    Inventors: Mark Raymond Griffin, Mervyn Lloyd Robertson
  • Patent number: 8186949
    Abstract: A method in connection with a wind turbine installation for damping tower vibrations, in particular a floating wind turbine installation comprising a floating cell, a tower arranged over the floating cell, a generator mounted on the tower that is rotatable in relation to the wind direction and fitted with a wind turbine, and an anchor line arrangement connected to anchors or foundations on the sea bed. The tower's eigenvibrations, ?eig, are damped by, in addition to control with the controller in the constant power or RPM range of the wind turbine, an increment, ??, being added to the blade angle of the turbine blades on the basis of the tower velocities, ?Z, so that the eigenvibrations are counteracted.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: May 29, 2012
    Assignee: StatoilHydro ASA
    Inventors: Finn Gunnar Nielsen, Bjorn Skaare, John Olav G. Tande, Ian Norheim, Kjetil Uhlen
  • Patent number: 8167555
    Abstract: Disclosed a horizontal axis wind turbine including: a rotor; a nacelle; a tower; an independent pitch control device; and a yaw control device, wherein the horizontal axis wind turbine is an up-wind type one including a waiting mode, wherein (1) the independent pitch control device performs a first step of changing all the blades to be in feathering states when the wind speed exceeds the predetermined value, a second step of changing the blades to be in reverse feathering states one by one sequentially, and a third step of holding all the blades in the reverse feathering states, and (2) the yaw control device controls a yaw brake to take a braking value allowing the yaw rotation when the wind speed exceeds the predetermined value, wherein the rotor is allowed to swing a leeward of the tower by executing the control operations (1) and (2) as the waiting mode.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: May 1, 2012
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Shigeo Yoshida
  • Publication number: 20110293417
    Abstract: In order to provide a wind turbine generator and an operation method of the wind turbine generator which is not subjected to damages caused by foreign objects inside a rotor hub, the wind turbine generator comprises blades, a rotor hub to which the blades are fixed, a rotating shaft such as a main shaft and a coupling being connected to the rotor hub and rotating with the rotor hub, a FO detection sensor arranged inside the rotor hub for detecting a foreign object inside the rotor hub, a brake device such as a pitch control unit and a parking brake for stopping the rotation of the rotating shaft, and a controller for controlling the brake device to stop the rotation of the rotating shaft when the FO detection sensor detects the foreign object.
    Type: Application
    Filed: July 28, 2010
    Publication date: December 1, 2011
    Applicant: MITSUBISIHI HEAVY INDUSTRIES, LTD
    Inventor: Naota Watanabe
  • 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: 8047770
    Abstract: A brake system is provided for controlling a rotational speed of a drivetrain for a wind turbine. The drivetrain is coupled to a rotor shaft and a generator rotor shaft. The brake system includes a mechanical brake operatively coupled to the drivetrain. The mechanical brake includes a brake caliper and a brake disc coupled to the drivetrain. A sensor is configured to detect a parameter of the wind turbine. A controller is configured to actuate the brake caliper to apply a braking force on the brake disc. The controller is configured to control the mechanical brake based on the parameter to adjust a brake torque generated by the braking force.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: November 1, 2011
    Assignee: General Electric Company
    Inventor: Axel Braicks
  • Publication number: 20110135470
    Abstract: A method for operating a wind turbine with a variable speed rotor, a control system and a safety system, including the steps of initiating a braking procedure of the rotor of the wind turbine by the control system when the rotational speed of the rotor exceeds a first threshold value (nc1), and activating a safety system for braking the rotor when the rotational speed of the rotor exceeds a second threshold value (ns1) and when the control system has not initiated a braking procedure, the second threshold value (ns1) being greater than the first threshold value (nc1).
    Type: Application
    Filed: August 31, 2010
    Publication date: June 9, 2011
    Applicant: Nordex Energy GmbH
    Inventor: Maximilian Merkel
  • Publication number: 20110135465
    Abstract: A brake system is provided for controlling a rotational speed of a drivetrain for a wind turbine. The drivetrain is coupled to a rotor shaft and a generator rotor shaft. The brake system includes a mechanical brake operatively coupled to the drivetrain. The mechanical brake includes a brake caliper and a brake disc coupled to the drivetrain. A sensor is configured to detect a parameter of the wind turbine. A controller is configured to actuate the brake caliper to apply a braking force on the brake disc. The controller is configured to control the mechanical brake based on the parameter to adjust a brake torque generated by the braking force.
    Type: Application
    Filed: December 30, 2009
    Publication date: June 9, 2011
    Inventor: Axel Braicks
  • Patent number: 7944070
    Abstract: A yaw system of a wind turbine includes a plurality of motors, each motor being coupled to the nacelle for applying torque to the nacelle; a plurality of controllers, one controller for each of the motors, each controller being configured to control the respective motor and coupled to at least one other controller to transmit operation information thereto; and a yaw system controller configured to transmit control information to at least one controller of the plurality of controllers. At least one of the controllers is configured to control the respective motor based on at least one of the control information and the received operation information from the at least one other controller. Communication between the controllers of the respective motors can allow a faster response of the yaw system to yaw the nacelle according to a change of wind direction.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: May 17, 2011
    Assignee: Vestas Wind Systems A/S
    Inventors: Paw Rosenvard, Lars Brink Christensen
  • Publication number: 20100209246
    Abstract: Apparatuses and methods are disclosed for the wind turbine yaw control. A wind turbine bedplate is rotateably mounted on a stationary tower. The bedplate is connected to a yaw encoder, which provides angular position of the bedplate with respect to the stationary tower. A wind vane, which can be attached to the bedplate, is connected to a wind vane encoder. The yaw encoder and wind vane encoder send data to a turbine controller. When the bedplate orientation differs from the average wind direction by a predetermined amount, a yaw brake that keeps the bedplate in place is released in a controllable fashion, such that some amount of friction between the brake pads and the stationary disk remains. Consequently, the bedplate will controllably rotate to align itself with the newly established average wind vector, thus aligning the turbine blade rotation plane substantially perpendicularly against the average wind vector.
    Type: Application
    Filed: February 10, 2010
    Publication date: August 19, 2010
    Inventor: Robert Migliori
  • Publication number: 20100133823
    Abstract: A wind turbine hybrid braking system is presented. The system includes a generator coupled to a main shaft of the wind turbine for generating and transmitting power. A mechanical brake is coupled to the main shaft for applying reaction torque upon braking of the wind turbine. The system further includes an electrical braking circuit coupled to the generator for acting in conjunction with the mechanical brake and dissipating active power via controlled switching.
    Type: Application
    Filed: September 25, 2009
    Publication date: June 3, 2010
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Simon Herbert Schramm, Christof Martin Sihler
  • Patent number: 7721434
    Abstract: An apparatus for stabilizing a shaft in an essentially horizontal position while an anchoring object at one end of the shaft is replaced without removal of an object at the opposite end of the shaft that would otherwise tend to destabilize the shaft from its essentially horizontal position includes a half-spool member configured to clamp above and around the shaft to resist torque around the rotor, under supports configured to attach to the half-spool member and clamp an underside of the shaft below the half-spool member, and a hydraulic or mechanical brake configured to resist torque on the shaft when the brake is engaged.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: May 25, 2010
    Assignee: General Electric Company
    Inventors: Patrick Weaver, Kirsh Alimohammed Afimiwala, Norman Scott Winneguth, Fulton Jose Lopez, Michael Ulfert Hornemann, Craig Leonard Christenson
  • Publication number: 20100068057
    Abstract: A method for stopping a pitch controlled wind turbine comprising a rotor with at least one blade (11), a mechanical brake (31) on the high speed shaft, a pitch system ((21, 23, 25) for adjusting the blade pitch angle, that includes: a) a first stage using the pitch system (21, 23, 25) for slowing down the rotor; b) a second stage using both the pitch system (21, 23, 25) and the mechanical brake (31) for stopping the rotor. The second stage begins when one of the following conditions takes place: the high speed shaft rotational speed is under a predefined value So; a predefined time delay To with respect to the beginning of the first stage is reached; a predefined high speed shaft torque level TLo is reached.
    Type: Application
    Filed: September 17, 2009
    Publication date: March 18, 2010
    Inventors: Michael Friedrich, Rasmus Andersen
  • Patent number: 7581926
    Abstract: A power generating system wherein a turbine is mounted on top of a tower or tethered underwater. The turbine includes a rotor having a main blade connected to a rotor hub and an extender section. An adjusting device positions the extender blade between a retracted position within the main blade and to an extended position to expose more or less of the rotor to the fluid flow. The adjusting device includes a servo-controlled rack and pinion mechanism that converts rotation of the pinion by a servomotor into linear motion of the extender blade. A generator is connected to the turbine for generating electrical energy.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: September 1, 2009
    Assignee: Clipper Windpower Technology, Inc.
    Inventors: James G. P. Dehlsen, Amir S. Mikhail
  • Publication number: 20090146432
    Abstract: A vertical axis wind turbine (10) comprises two turbine rotors (12) and (13) with a plurality of curved blades (14) and (15) and coupled together by gears underneath their shafts and rotating synchronously in opposite directions, a multi-function center enhance (16) with three sections namely, the front deflector (21), the upwind blade cavity (22) and the turbulence reducer (23) and together with the two side deflectors (17) and (18) contribute to the efficient flow of the wind stream to the downwind moving blades (28) and (29) of the two turbine rotors. The center enhance separates the two turbine rotors on opposite sides. The wind turbine (10) has a cylindrical housing structure (11) with two levels of horizontal platform (19) and (20) housing various components of the machine, and a yaw drive mechanism that orients properly the machine into the wind.
    Type: Application
    Filed: September 2, 2005
    Publication date: June 11, 2009
    Inventor: Abraham E. Ballena
  • Publication number: 20090097975
    Abstract: A fan system comprises a hub, a plurality of fan blades, a drive system, and a stationary tube. The hub is configured to rotate. The fan blades are mounted to the hub. The drive system comprises a rotatable hollow output shaft. The hollow output shaft is in communication with the hub, such that the drive system is operable to rotate the hub via the hollow output shaft. The stationary tube is inserted through the hollow output shaft. The stationary tube is configured to remain stationary as the hollow output shaft rotates. Wires and the like may be passed through the stationary tube, to reach an accessory mounted at the bottom of the stationary tube. The fan system may also include a detector, such as a heat detector, a smoke detector, or an accelerometer. The detector may power down the fan system in response to detecting certain conditions.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 16, 2009
    Inventors: Richard Michael Aynsley, Richard W. Fizer, Richard A. Oleson, J. Carey Smith
  • Publication number: 20090001724
    Abstract: Provided are an apparatus and method for controlling a vertical axis wind power generation system that controls the rotation of guide vanes according to wind direction and speed, appropriately controls a direction of wind passing over an impeller, thereby maintaining a rotational speed generating the maximum power, maintains output power of a generator as rated power according to wind direction and speed, and stops the generator when a low or high wind speed outside a setting value range, an error in a structure, a fault in a braking unit, and/or a fault in guide vanes is detected.
    Type: Application
    Filed: June 24, 2008
    Publication date: January 1, 2009
    Applicant: KR CO., LTD.
    Inventors: Seung Bae LEE, Jeoung Ik JANG
  • Patent number: 7384239
    Abstract: The drive device is provided for inclusion in a windmill with two counter-rotating screws. The shafts of the screws are each connected to a spindle of an epicyclical gearbox, the third spindle providing the energy for the user. The device further comprises a brake device simultaneously acting on the two shafts of the screws. In particular, said device permits the installation of a second screw on a windmill mast designed for a single screw on a windmill mast designed for a single screw, thus greatly increasing the power supplied.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: June 10, 2008
    Assignee: Eotheme Sarl
    Inventor: André Wacinski
  • Patent number: 7347667
    Abstract: This relates to a wind power installation comprising a pylon (tower) and a rotor arranged on the pylon and having at least one individually adjustable rotor blade. The wind power installation further comprises a device to detect the wind direction, a device to detect the azimuthal position and/or a device to detect the deviation from vertical of the pylon (tower). In one embodiment, a control unit is coupled to the rotor blade to adjust an angle of incidence of the at least one adjustable rotor blade using information which is representative of (i) the wind direction, (ii) the azimuthal position of the rotor, and (iii) the deviation from vertical of the pylon. The rotor blade may be adjusted in dependence on a deviation between the ascertained wind direction and the detected azimuthal position.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: March 25, 2008
    Inventor: Aloys Wobben
  • Patent number: 7204673
    Abstract: A method for controlling a wind power installation at very high wind speeds, in which there is predetermined a first wind speed at which the rotor blades of the wind power installation are put into a first predetermined setting. In addition, the method includes controlling the wind power installation during an extreme wind situation where the rotor blades moved to a position to reduce, as far as possible, mechanical loadings on the wind power installation caused by the extreme wind situation.
    Type: Grant
    Filed: November 15, 2001
    Date of Patent: April 17, 2007
    Inventor: Aloys Wobben
  • 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: 6857846
    Abstract: A stackable, vertical axis windmill comprised of a braced external frame that enables stacking of multiple windmill assemblies. Couplings are located on both ends of the vertical rotor shaft to enable stacking and the transmission of power, an internal wind flow cavity, and controlled wind guides is described. The external frame includes structural bracing that allows for two or more windmill to be stacked one upon another to optimize the use of land or rooftop space for the generation of electricity from wind power. The computer controlled wind guides automatically close partially in high wind conditions in order to prevent damage to the windmill. The internal wind flow cavity allows wind to transfer power to both the windward and leeward rotors blades. The rotor axis is constructed so that all bearings can be replaced without dismantling the structure.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: February 22, 2005
    Inventor: Lewis H. Miller
  • 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
  • Patent number: 6193464
    Abstract: The present invention comprises a feedback-controlled braking apparatus that applies a modulated braking force that smoothly decelerates a rotating shaft such that it comes to rest at a precise location. According to a preferred embodiment of the present invention the rotor hub of a rotor/wing aircraft is coupled to a hydraulically actuated friction brake, such as a conventional disk brake. The disk brake caliper is supplied with fluid pressure from an electrically actuated servo valve which, in turn, is controlled by an electronic controller. A sensor monitors the angular position and velocity of the rotor main shaft. The velocity and position information is provided to the controller, which modulates the brake pressure as required to bring the rotor to a stop at exactly the right orientation relative to the aircraft.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: February 27, 2001
    Assignee: McDonnell Douglas Helicopter Company,
    Inventors: Daniel A. Nyhus, Stephen S. Osder
  • Patent number: 6000907
    Abstract: A fluid-activatable vane is defined by a thin vane body having opposed narrow leading and trailing side edges and opposed substantially smooth large top and bottom surfaces. The body has a central longitudinal axis and is substantially symmetrical on opposed sides of the axis. An attachment shaft is aligned with the central axis at a near end edge of the vane to secure two diametrically opposed vanes through a coupling wherein the vane will tilt along a 90.degree. arc from a horizontal plane to a vertical plane when exposed to a fluid flow. The two vanes form a propeller and are fixed to a respective end of the attachment shaft in a respective plane and offset 90.degree. from one another. A fluid actuatable torquing curved outer end edge portion is formed integral with the vane body in an outer end edge portion thereof and on a respective side of a central longitudinal axis.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: December 14, 1999
    Inventor: Adrian Bic
  • Patent number: 5855471
    Abstract: A helicopter rotor brake assembly for arresting rotational movement of a main rotor drive shaft, wherein the helicopter rotor brake assembly is mechanically interconnected with the main rotor drive shaft through a main transmission. The helicopter rotor brake assembly includes a brake disc rotatably mounted about an axis, wherein the brake disc is mechanically interconnected with the main transmission, and wherein the brake disc defines a plane substantially perpendicular to the axis. A bracket is provided for disposal in combination with the brake disc, and comprises a beam member defining a first end and a second end, a first arcuate member connected to the first end of the beam member and disposed substantially co-planar with the plane defined by the brake disc, and a second arcuate member connected to the second end of the beam member and disposed substantially co-planar with the plane defined by the brake disc.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: January 5, 1999
    Assignee: Sikorsky Aircraft Corporation
    Inventor: Anthony G. Chory
  • Patent number: 5765672
    Abstract: A device (10) is disclosed for intercepting the input of a system (23) of an internal combustion engine (12) normally provided to a solenoid valve (22) for actuating a fan clutch (20) when rotation of a fan (16) is desired. The input is received by terminals (42, 43) and is conditioned and passed on to a timer (96) and a controller (97). A vacuum switch (24) senses whether the fan (16) is rotating and provides a second input to the controller (97). In the event that an input is provided by the system (23) and the time delay signal has been provided by the timer (96) and also in the event that an input is provided by the system (23), the time delay has expired, and the second input is provided by the vacuum switch (24), the controller (97) provides an actuation output to terminals (71, 73) connected to the solenoid valve (22) by use of actuation provisions (98) to actuate the fan clutch (20).
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: June 16, 1998
    Assignee: Horton, Inc.
    Inventors: Bradley R. Briggs, William R. Daniels, Charles M. Bastien
  • Patent number: 5183387
    Abstract: Fault-tolerant apparatus for controlling first and second input members of a mechanical actuator includes first and second electrical machines and at least two controllers. The first and second electrical machines, which apply braking forces to the first and second input members, respectively, are provided with stators having pluralities of isolated phase windings. Each controller is coupled to a phase winding of the first electrical machine, and also to a phase winding of the second electrical machine. Any one controller can excite the first electrical machine to apply the braking force to the first input member or the second electrical machine to apply the braking force to the second input member.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: February 2, 1993
    Assignee: Allied-Signal, Inc.
    Inventors: Colin E. Huggett, Kenneth L. Wuertz