Patents Examined by Pedro J. Cuevas
  • Patent number: 10020763
    Abstract: A power generation system is provided in which, when a static frequency converter (SFC) is connected to synchronous generator's armature windings, an AC exciter performs AC excitation by allowing a d-axis winding and a q-axis winding of the AC exciter to configure d-q orthogonal axes; and, at the time of steady-state operation of the synchronous generator, an alternating current(s) supplied from an electric power source is rectified by a thyristor excitation device, and also the AC exciter thereby performs DC excitation by connecting the d-axis winding and the q-axis winding in series with each other.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: July 10, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Akiko Tabuchi, Toshiyuki Fujii, Ryota Onishi, Shinya Noguchi, Ryoji Miyatake
  • Patent number: 10018180
    Abstract: The present invention relates to a method for controlling a wind power plant, the wind power plant comprising a plurality of wind turbine generators, each wind turbine generator comprising at least one power converter for providing active power and/or reactive power to an electrical grid, wherein the method is determining a required amount of reactive power provided by the plurality of wind turbine generators, and grouping the plurality of wind turbine generators into a first set of wind turbine generators and a second set of wind turbine generators based on a demand for reactive power; and supplying reactive power to the grid (20) from the first set of wind turbine generators and disconnecting the second set of wind turbine generators from the electrical grid (20) in response to a control demand, in order to minimize active power losses. The present invention also relates to a wind power plant arranged to perform the method.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: July 10, 2018
    Assignee: Vestas Wind Systems A/S
    Inventors: Martin Ansbjerg Kjær, Henrik Møller Ravn, Jorge Martinez Garcia, Henrik Møller, Kouroush Nayebi
  • Patent number: 10006442
    Abstract: A drive train includes a gearbox having a gearbox housing, and a generator having a generator housing. A lubricating oil system including an oil reservoir lubricates toothed contact areas and/or bearings which are arranged within the gearbox housing. The oil reservoir is arranged within the generator housing or on an exterior side of the generator housing.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: June 26, 2018
    Assignee: Siemens Aktiengesellschaft
    Inventor: Matthias Deicke
  • Patent number: 10003239
    Abstract: The present application provides a doubly-fed induction generator system for a multi-shaft gas turbine engine. The doubly-fed induction generator system may include a first doubly-fed induction generator in communication with a first shaft of the multi-shaft gas turbine engine, a first rotor of the first doubly-fed induction generator in communication with a converter via a first rotor bus, and a first breaker on the first rotor bus. The first doubly-fed induction generator acts as a generator or a motor depending in part upon the position of the first breaker.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: June 19, 2018
    Assignee: General Electric Company
    Inventors: Hua Zhang, Fabien Thibault Codron, Gunnar Leif Siden, Frank Douglas Beadie
  • Patent number: 10003240
    Abstract: A method for generating electrical power, the method including: storing potential energy in an elastic element having one end attached to a shaft and another end attached to a structure upon rotation of the shaft relative to the structure in a first angular direction; and moving a retaining mechanism between an engaged position for retaining the shaft from rotating in a second angular direction opposite to the first angular direction and a power generating position permitting the shaft to rotate in the second angular direction; wherein when the retaining mechanism is moved to the power generating position, the stored potential energy in the elastic element is converted to kinetic energy to rotate the shaft which in turn rotates a generator operatively coupled to the shaft so as to produce electrical power.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: June 19, 2018
    Assignee: OMNITEK PARTNERS LLC
    Inventor: Jahangir S Rastegar
  • Patent number: 9995268
    Abstract: A waterwheel generator providing a high efficiency rotational movement and floating on the surface of the water to generate power according to a water flow. A buoyant installation frame is filled with a predetermined amount of buoyant medium. A waterwheel rotational blade unit includes a plurality of rotational blades attached around a rotational shaft in a waterwheel receiving hole and immersed in a predetermined depth of water. The waterwheel receiving hole is formed at one side of the buoyant installation frame and exposed to water having a predetermined flowing speed. Height adjustment means is arranged at both ends of the rotational shaft to adjusts its height. Wire hooking means is configured around the outer periphery of the buoyant installation frame to prevent the buoyant installation frame from being carried away by the flow of water. A generator is provided at one side of the rotational shaft.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: June 12, 2018
    Inventors: Yu Il Kim, Seo Lim Kim
  • Patent number: 9998045
    Abstract: In one embodiment, a generator includes a rotor configured to rotate in cooperation with a stator to generate electrical power. A sensor, which is supported by the rotor, is configured to generate a trigger signal indicative of a position of the rotor. A communication interface is configured to receive the trigger signal from the sensor of the rotor and receive data indicative of an output of the generator. A controller supported by the rotor or configured to perform a phase analysis of the trigger signal and the output of the generator and calculate a power angle for the generator based on the phase analysis.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: June 12, 2018
    Assignee: Kohler Co.
    Inventors: Isaac S. Frampton, Adam Larson, Richard Van Maaren
  • Patent number: 9994332
    Abstract: An engine assembly for use as an aircraft auxiliary power unit, having internal combustion engine(s) in driving engagement with an engine shaft, a generator having a generator shaft directly engaged to the engine shaft such as to be rotatable at a same speed, a compressor having an outlet in communication with the internal combustion engine inlet, and a turbine having an inlet in communication with the internal combustion engine outlet. The turbine may be a first stage turbine, and the assembly may include a second stage turbine having an inlet in communication with the first stage turbine outlet. A method of providing electrical power to an aircraft is also discussed.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: June 12, 2018
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Richard Ullyott, Anthony Jones, Andre Julien, Jean Thomassin
  • Patent number: 9991763
    Abstract: A power plant for a small aircraft with a gas turbine engine that drives a number of electric generators, where a gear box transmit power from the engine shaft to the number of generators, the gear box having a single input shaft that drives a number of driven gears with each driven gear having a generator drive shaft that extends out both sides, and an electric generator connected to each side of the drive shaft. A compact arrangement of generators are formed where each generator can be disengaged from the drive shaft to regulate total electrical output or to prevent a damaged generator from causing damage to other parts of the system or aircraft.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: June 5, 2018
    Assignee: Florida Turbine Technologies, Inc.
    Inventors: James P Downs, Robert L Memmen
  • Patent number: 9991833
    Abstract: A control device for rotating electric machine, which controls a rotating electric machine as a charging electric generator, using an inverter circuit, the control device including: an energization amount generating unit for generating a first electric generation mode in which an energization amount for a field winding and an energization amount for an armature winding of the rotating electric machine are controlled and the inverter circuit is driven to perform electric generation, and a second electric generation mode in which an energization amount for the field winding is controlled to perform electric generation; and an energization signal generating unit for, on the basis of variation-related information relevant to variation in one of electric generation torque and electric generation current of the rotating electric machine, performing switching between the first electric generation mode and the second electric generation mode, and generating energization signals for the field winding and the armature
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: June 5, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomohiro Seki, Masahiro Iezawa, Ryo Nakamura, Yuya Hisano
  • Patent number: 9991771
    Abstract: This invention relates to an active control system for a variable electromotive-force generator (VEG) for use in wind turbines, ships, hybrid vehicles, and related applications.
    Type: Grant
    Filed: November 5, 2014
    Date of Patent: June 5, 2018
    Assignee: THE UNIVERSITY OF MARYLAND, BALTIMORE COUNTY
    Inventors: Weidong Zhu, Navid Goudarzi, Xuefeng Wang
  • Patent number: 9985562
    Abstract: A synchronous generator may comprise a rotor and a stator. The stator may comprise a first armature winding configured to output a first three-phase voltage, a second armature winding configured to output a second three-phase voltage, and a first variable inductor, wherein the first variable inductor is tunable in response to a rotational frequency of the rotor.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: May 29, 2018
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gregory I. Rozman, Jacek F. Gieras, Steven J. Moss
  • Patent number: 9985499
    Abstract: A generator unit is provided for attachment to an agricultural work vehicle with a gear module and a generator module. The gear for the driving of the generator module is connected in a drive system with the generator module, and the gear module and the generator module are hydraulically connected with one another via an integrated cooling and lubricating agent circuit.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: May 29, 2018
    Assignee: DEERE & COMPANY
    Inventors: Barbara Boehm, Rainer Gugel
  • Patent number: 9970419
    Abstract: This disclosure provides an apparatus and system for an energy capturing pod (ECP). The ECP includes a specialized funnel shell, and a turbine. The turbine is structured with a horizontal axle in respect to a front opening of the ECP. The specialized funnel shell is designed to accelerate in coming wind speed. The specialized funnel shell includes a horizontal top airfoil that is inverted and linear along a width of the specialized funnel shell, and a horizontal bottom airfoil that is linear along the width of the specialized funnel shell.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: May 15, 2018
    Inventor: Tarek O. Souryal
  • Patent number: 9970417
    Abstract: This disclosure relates to systems and methods for controlling a wind converter for a weak electrical grid. In one embodiment of the disclosure, a system for controlling the wind converter includes a wind converter connected to an electrical grid at a point of connection (POC) and operable to transfer a power to the electrical grid. The system includes a first control loop operable to calculate, based on electrical grid parameters and wind converter characteristics, a voltage reference to be generated by the wind converter. The system includes a second control loop to convert, based on the electrical grid parameters, the voltage reference into a current reference. The second loop converts the angle information of the voltage reference into a voltage at the POC. The system includes a third control to regulate, based at least on the current reference, the power transferred by the wind converter to the electrical grid.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: May 15, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Zhihui Yuan, Robert Roesner, Stefan Schroeder, Ara Panosyan, Krishna Kumar Anaparthi
  • Patent number: 9973123
    Abstract: The present subject matter is directed to a method for controlling a generator of an electrical power system. The generator includes a generator stator magnetically coupled to a generator rotor. The method includes operating the generator stator of the generator at a first voltage level. Another step includes monitoring, via one or more sensors, at least one of a rotor speed or a rotor voltage of the generator rotor. The method also includes reducing the first voltage level of the generator stator by a predetermined percentage when the rotor speed is within a low speed range or the rotor voltage exceeds a predetermined threshold so as to increase an operating range of the rotor speed. Thus, the increased operating range of the rotor speed increases power production of the electrical power system in the low speed range.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: May 15, 2018
    Assignee: General Electric Company
    Inventor: Anthony Michael Klodowski
  • Patent number: 9964044
    Abstract: An auxiliary power unit (APU) starting system for an aircraft comprises an APU comprising a starter motor and a generator, a DC power network, an AC power network, an electric connection line, and a control unit for controlling the APU starting and generating phase. The APU starting system additionally comprises switches for alternatively connecting through the electric connection line the DC power network with the APU starter motor, and the AC power network with the APU generator, wherein the control unit is further configured to operate the switches to connect the DC power network with the APU starter motor during the APU starting phase, and the AC power network with the APU generator during the APU starting phase.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: May 8, 2018
    Assignee: Airbus Operations S.L.
    Inventors: Alberto Juarez Becerril, Mario Marcos Garcia
  • Patent number: 9960600
    Abstract: Methods and systems for stabilizing a power system include receiving a set point for a power system that includes the compensation circuitry controlled by the control system. A firing angle for the power system is set based at least in part on the set point. An angle between a generator terminal of a generator of the power system and a bus of the power system is calculated. A determination is made whether the angle is within a threshold value of the firing angle. When the angle is not within the threshold value of the firing angle, compensation circuitry is engaged to stabilize the power system.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: May 1, 2018
    Assignee: General Electric Company
    Inventors: Tabrez Shakeel, Muhammed Rahim
  • Patent number: 9957952
    Abstract: A method for controlling at least one wind turbine, wherein the at least one wind turbine is set up to feed electrical power into an electrical power grid, and, depending on an amount of power of the electrical power grid, electrical active power is fed into the electrical power grid or electrical active power is removed from the electrical power grid and is supplied to at least one electrical consumer of the at least one wind turbine, and, depending on a further state variable of the electrical power grid, electrical reactive power is fed into the electrical power grid or electrical reactive power is removed from the electrical power grid.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: May 1, 2018
    Assignee: Wobben Properties GmbH
    Inventor: Helge Giertz
  • Patent number: 9957018
    Abstract: The present invention is related generally to electric energy production and storage and more particularly to three devices that can work independently or as a system for generating, storing and retrieving of significant volume of “green” electric energy from sea and ocean waves. The present invention comprises of three module systems for wave power amplifying, wave power harnessing and conversion to electric energy, and energy storage. The system could double the height and quadruple the power of any wave, harness and convert all the wave power to electrical energy, store it without loss for as long as needed, and release it when and as needed.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: May 1, 2018
    Inventor: Cvetan Angeliev