Patents by Inventor Kevin A. Dooley

Kevin A. Dooley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Gas turbine engine fuel control system
    Patent number: 7950216
    Abstract: A fuel control system having a combustive energy value evaluator determining a combustive energy value of the fuel, and a controller calculating a desired flow rate based at least on the combustive energy value and controlling a fuel metering device such that the fuel flow rate corresponds to the desired fuel flow rate.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: May 31, 2011
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Kevin A. Dooley, Joseph Brand
  • Generator for gas turbine engine having main DC bus accessory AC bus
    Patent number: 7952220
    Abstract: An aircraft electrical system includes a generator that supplies electrical AC power to a plurality of accessories associated with a gas turbine engine. The generator also supplies power to an aircraft DC bus in parallel to the supply to the accessory bus.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: May 31, 2011
    Assignees: Hamilton Sundstrand Corporation, Pratt & Whitney Canada Corp.
    Inventors: Gregory I. Rozman, Kevin Dooley
  • FABRICATION OF PASSIVE ELECTRONIC COMPONENTS
    Publication number: 20110063776
    Abstract: A method for fabrication of passive electronic components includes disposing a sacrificial layer on a carrier and forming a curable resin layer on top of the sacrificial layer and patterning the curable resin to form a cured resin template having multiple pattern levels. A metal material is deposited into the first pattern level to form a first structure. A dielectric material is then formed on exposed portions of the first structure. A nonselective subtractive process is used to expose the sacrificial layer in a bottom of the second pattern level and metal material is deposited into the second pattern level and built up to include a portion which crosses over the dielectric material.
    Type: Application
    Filed: September 15, 2009
    Publication date: March 17, 2011
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Lorraine Byrne, Kevin Dooley, David Fitzpatrick
  • Generator for gas turbine engine having DC bus fault short circuit control using a battery
    Patent number: 7876542
    Abstract: An aircraft electrical system comprises a generator to be driven as part of a gas turbine engine. The generator supplies electrical power to a plurality of accessories associated with the gas turbine engine, and to an aircraft DC bus in parallel to the supply to the accessories. A battery supplies voltage to a control circuit for the generator through a selectively opened and closed switch. A control detects a short circuit on the aircraft DC bus. The battery switch allows power from the battery to flow to provide control voltage for the generator when the control detects a short circuit on the aircraft DC bus.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: January 25, 2011
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gregory I. Rozman, Kevin Dooley, Vijay K. Maddali
  • Voltage regulation to reduce ripple in a power generation system
    Patent number: 7859230
    Abstract: Methods and systems are disclosed for reducing alternating current ripples in direct current electrical power generation systems with one or more regulated permanent magnet machines. Ripple suppression is achieved, in one aspect, by modulating the control current of a regulated permanent magnet machine.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: December 28, 2010
    Assignee: Pratt & Whitney Canada Corp
    Inventors: Gregory I. Rozman, Kevin A. Dooley
  • High Voltage Start of an Engine from a Low Voltage Battery
    Publication number: 20100283242
    Abstract: Method and system are disclosed for starting a high voltage engine using a starter permanent magnet motor. The starter motor is powered using a DC power source remote from the starter motor. A bidirectional DC-to-DC converter local to the DC power source is used to produce a variable high voltage variable frequency power for driving the starter motor, and is remotely controlled to produce a controlled output current level. During generate mode the DC-DC converter may be used to charge the battery.
    Type: Application
    Filed: December 26, 2007
    Publication date: November 11, 2010
    Inventors: Kevin A. Dooley, Tony Yee, Gregory I. Rozman
  • Depositing carbon nanotubes onto substrate
    Publication number: 20100224354
    Abstract: To deposit carbon nanotubes onto a substrate, an at least partially porous film is prepared so that a surface of the film has a layer of carbon nanotubes thereon. The film is positioned in relation to a surface of the substrate such that the surface of the film having the layer of carbon nanotubes is brought into contact with the surface of the substrate. Pressure is applied to the film to attach the film, including the layer of carbon nanotubes, to the surface of the substrate.
    Type: Application
    Filed: March 8, 2009
    Publication date: September 9, 2010
    Inventors: Kevin Dooley, Ratnesh Kumar Sharma, Lynn Sheehan, Sergio Escobar-Vargas, Anna Fenelon
  • Starter/generator system with control to address a voltage rise
    Patent number: 7786708
    Abstract: A control circuit for a generator has a control function that monitors the voltage across a bus capacitor. The circuit delivers excess voltage back to associated stator windings if an unduly high voltage is detected across the bus capacitor.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: August 31, 2010
    Assignees: Pratt & Whitney Canada Corp., Hamilton Sunstrand Corporation
    Inventors: Gregory I. Rozman, Vijay K. Maddali, Kevin Dooley
  • MULTI-ROTOR ELECTRIC MACHINE
    Publication number: 20100156221
    Abstract: Electric machines comprising a plurality of magnetized rotors, preferably including bi-pole magnets. The rotors are configured to drive and/or be driven by a common shaft, as for example by suitable configurations of gears. The rotors are magnetically indexed, in pairs, with respect to each other and to corresponding electrical windings, such that, when a current is passed through the one or more windings, the rotors provide phased rotary power to the common shaft; or, when torque is applied to the common shaft, a phased electrical output is provided to the windings.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 24, 2010
    Applicant: Pratt & Whitney Canada Corp.
    Inventor: Kevin A. Dooley
  • Starting a gas turbine engine using a sensorless, brushless motor
    Patent number: 7723931
    Abstract: A method and apparatus for starting a gas turbine engine using a brushless sensorless machine, the machine having a rotor and a stator with windings, the method including positioning the rotor at a desired position with respect to the stator and then energizing the windings of the stator.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: May 25, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin A. Dooley
  • Motor drive architecture for high frequency AC bus
    Patent number: 7710058
    Abstract: A motor drive for an electric motor receives high frequency AC current, and delivers this current through a converter which is operable to change the current delivered downstream to an inverter and an electric motor.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: May 4, 2010
    Assignees: Hamilton Sundstrand Corporation, Pratt & Whitney Canada Corp.
    Inventors: Gregory I. Rozman, Kevin Dooley
  • Electric motor control
    Patent number: 7701678
    Abstract: A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The system includes aspects which permit, among other things, electromagnetically disconnecting a failed permanent magnet motor from said system, weight savings in motor control electronics, controllability benefits and other benefits.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: April 20, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin A. Dooley
  • System and method for mitigating an electrical arc fault
    Patent number: 7701681
    Abstract: A method and apparatus for mitigating arc faults in a power generation system includes reducing and/or eliminating voltage when an arc is present, to protect the system from associated damage.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: April 20, 2010
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin A. Dooley
  • CONTROLLING TRANSIENT RESPONSE OF A POWER SUPPLY
    Publication number: 20100054006
    Abstract: A method and apparatus is provided to, among other things, supply power to a load under various load conditions. Output voltage transient responses of the system, such as may be caused by transients changes in the load conditions, may be controlled through current transformation on the output in order to correct or impede over-voltage conditions of the transient response.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 4, 2010
    Inventor: Kevin A. DOOLEY
  • PERMANENT MAGNET ROTOR CRACK DETECTION
    Publication number: 20090322373
    Abstract: A method and apparatus for permanent magnetic (PM) rotor crack detection includes a sensor which monitors magnetic flux distribution of the PM rotor and identifies the presence of a crack in the PM rotor when a magnetic flux distribution change or anomaly is detected.
    Type: Application
    Filed: June 26, 2008
    Publication date: December 31, 2009
    Applicant: PRATT & WHITNEY CANADA CORP.
    Inventor: Kevin A. DOOLEY
  • Laser patterning of a carbon nanotube layer
    Publication number: 20090311489
    Abstract: A method of patterning a carbon nanotube layer includes providing a substrate comprising a carbon nanotube layer. A laser beam is generated. The laser beam is directed onto a first surface of the carbon nanotube layer. Relative movement between the laser beam and the first surface is caused, thereby forming at least one cavity feature on the first surface.
    Type: Application
    Filed: August 27, 2007
    Publication date: December 17, 2009
    Inventors: Lynn Sheehan, Kevin Dooley, Rory Jordan
  • SYSTEM AND METHOD FOR MITIGATING AN ELECTRICAL ARC FAULT
    Publication number: 20090213509
    Abstract: A method and apparatus for mitigating arc faults in a power generation system includes reducing and/or eliminating voltage when an arc is present, to protect the system from associated damage.
    Type: Application
    Filed: February 27, 2008
    Publication date: August 27, 2009
    Inventor: Kevin A. DOOLEY
  • Motor Drive Architecture with Active Snubber
    Publication number: 20090167225
    Abstract: A method and apparatus is disclosed for controlling a system comprising at least one electric motor. The motor drive circuit includes a reconfigurable active snubber. Under given resonance conditions, the active snubber is configured to use a resistive element to dissipate electrical transients across the commutation circuit.
    Type: Application
    Filed: December 26, 2007
    Publication date: July 2, 2009
    Inventors: Kevin A. Dooley, Gregory I. Rozman
  • Voltage Regulation to Reduce Ripple in a Power Generation System
    Publication number: 20090167255
    Abstract: Methods and systems are disclosed for reducing alternating current ripples in direct current electrical power generation systems with one or more regulated permanent magnet machines. Ripple suppression is achieved, in one aspect, by modulating the control current of a regulated permanent magnet machine.
    Type: Application
    Filed: December 26, 2007
    Publication date: July 2, 2009
    Inventors: Gregory I. Rozman, Kevin A. Dooley
  • Monitoring of Capacitor
    Publication number: 20090167541
    Abstract: A capacitive element is monitored to detect at least one of a degradation level, a capacitor life expectancy, and preferably servicing alarms are generated upon detection of a critical health state. The system allows, among other things, non-hermetically sealed capacitances to be safely and cost-effectively used in weight-sensitive applications, such as in aircraft electronic systems.
    Type: Application
    Filed: December 26, 2007
    Publication date: July 2, 2009
    Inventors: Kevin A. Dooley, Gregory I. Rozman