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).
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Patent number: 10669950Abstract: There is described an oil and fuel control system and method for an engine. The system comprises an electric machine having a single rotor coupled to a dual channel stator comprising a first stator and a second stator, for operating as a motor to generate motive power; a dual channel motor drive unit coupled to the electric machine; a dual channel full authority digital engine control (FADEC) coupled to the dual channel motor drive unit; an oil delivery system comprising an oil pump and oil accessories, coupled to the single rotor of the electric machine; and a fuel delivery system comprising a fuel pump and fuel accessories, coupled to the single rotor of the electric machine.Type: GrantFiled: April 20, 2017Date of Patent: June 2, 2020Assignee: PRATT & WHITNEY CANADA CORP.Inventor: Kevin A. Dooley
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Patent number: 10578071Abstract: There is described a method for and system for starting at least one engine from a twin engine installation.Type: GrantFiled: November 7, 2017Date of Patent: March 3, 2020Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Kevin A. Dooley, Keith Morgan, Tatjana Pekovic
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Patent number: 10094295Abstract: A multi spool gas turbine engine with a differential having a selectively rotatable member which rotational speed determines a variable ratio between rotational speeds of driven and driving members of the differential. The driven member is engaged to the first spool and a rotatable shaft independent of the other spools (e.g. connected to a compressor rotor) is engaged to the driving member. First and second power transfer devices are engaged to the first spool and the selectively rotatable member, respectively. A circuit interconnects the power transfer devices and allows a power transfer therebetween, and a control unit controls the power being transferred between the power transfer devices. Power can thus be transferred between the first spool and the selectively rotatable member to change the speed ratio between the first spool and the rotatable shaft.Type: GrantFiled: January 30, 2013Date of Patent: October 9, 2018Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Richard Ullyott, Keith Morgan, Jean Dubreuil, Lazar Mitrovic, Kevin A. Dooley, Stephen Kenny, Ilya Medvedev, Johnny Vinski
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Patent number: 9840997Abstract: There is described a method and system for starting at least one engine from a twin engine installation having a first engine arrangement and a second engine arrangement. The method comprises receiving a first voltage level from a power source and increasing the first voltage level to a second voltage level; charging an energy storage unit having at least a first super-capacitor and a second super-capacitor to the second voltage level; selectively connecting one of the first super-capacitor and the second super-capacitor to a first power control unit in the first engine arrangement; controlling a discharge current to a first electric machine in the first engine arrangement via the first power control unit; and rotating a rotor of the first electric machine to an above engine idle speed to start a first engine of the twin engine installation.Type: GrantFiled: March 14, 2013Date of Patent: December 12, 2017Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Kevin A. Dooley, Keith Morgan, Tatjana Pekovic
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Patent number: 9657645Abstract: There is described a method for controlling an engine and a system architecture for an engine. The system architecture comprises a first electric machine having a single rotor dual stator configuration for operating as a starter-generator for the engine; a second electric machine having a single rotor dual stator configuration for operating as a motor; a dual channel motor drive unit coupled to the second electric machine; a dual channel power control unit coupled to the first electric machine and the motor drive unit; a dual channel full authority digital engine control (FADEC) coupled to the dual channel power control unit and the dual channel motor drive unit; and at least two accessories coupled to the second electric machine and driven by motive power from the single rotor of the second electric machine.Type: GrantFiled: February 25, 2013Date of Patent: May 23, 2017Assignee: PRATT & WHITNEY CANADA CORP.Inventor: Kevin A. Dooley
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Patent number: 9127596Abstract: 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: GrantFiled: April 21, 2011Date of Patent: September 8, 2015Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Kevin A. Dooley, Joseph Brand
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Patent number: 8942013Abstract: A system and method for protecting an electrical power generation system from an over-voltage. The output voltage of a multi-phase rectifier, operatively connected between the output terminals of an electric machine and a load, is monitored. The input of the multi-phase rectifier is short-circuited upon detection that the output voltage has reached a threshold voltage. Removal of the short-circuiting of the input of the multi-phase rectifier is synchronized with a substantially zero-crossing of phase current flowing through switching devices in the rectifier once the output voltage is no longer above the threshold voltage.Type: GrantFiled: February 21, 2013Date of Patent: January 27, 2015Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Patent number: 8604756Abstract: 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: GrantFiled: August 29, 2008Date of Patent: December 10, 2013Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Patent number: 8232700Abstract: 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: GrantFiled: December 19, 2008Date of Patent: July 31, 2012Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Patent number: 8095324Abstract: 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: GrantFiled: June 26, 2008Date of Patent: January 10, 2012Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Patent number: 8076882Abstract: 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: GrantFiled: December 26, 2007Date of Patent: December 13, 2011Assignees: Pratt & Whitney Canada Corp., Hamilton Sundstrand CorporationInventors: Kevin A. Dooley, Gregory I. Rozman
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Patent number: 7950216Abstract: 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: GrantFiled: January 30, 2007Date of Patent: May 31, 2011Assignee: Pratt & Whitney Canada Corp.Inventors: Kevin A. Dooley, Joseph Brand
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Patent number: 7859230Abstract: 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: GrantFiled: December 26, 2007Date of Patent: December 28, 2010Assignee: Pratt & Whitney Canada CorpInventors: Gregory I. Rozman, Kevin A. Dooley
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Publication number: 20100283242Abstract: 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: ApplicationFiled: December 26, 2007Publication date: November 11, 2010Inventors: Kevin A. Dooley, Tony Yee, Gregory I. Rozman
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Publication number: 20100156221Abstract: 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: ApplicationFiled: December 19, 2008Publication date: June 24, 2010Applicant: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Patent number: 7723931Abstract: 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: GrantFiled: May 31, 2006Date of Patent: May 25, 2010Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Patent number: 7701681Abstract: 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: GrantFiled: February 27, 2008Date of Patent: April 20, 2010Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Patent number: 7701678Abstract: 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: GrantFiled: September 22, 2008Date of Patent: April 20, 2010Assignee: Pratt & Whitney Canada Corp.Inventor: Kevin A. Dooley
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Publication number: 20090167255Abstract: 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: ApplicationFiled: December 26, 2007Publication date: July 2, 2009Inventors: Gregory I. Rozman, Kevin A. Dooley
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Publication number: 20090167541Abstract: 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: ApplicationFiled: December 26, 2007Publication date: July 2, 2009Inventors: Kevin A. Dooley, Gregory I. Rozman