Patents by Inventor Evelyn Marie Matheson

Evelyn Marie Matheson 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).

  • Regulated transformer rectifier unit for aircraft systems
    Patent number: 10389114
    Abstract: A method and apparatus for providing regulated direct current power for a direct current load on an aircraft. A regulated transformer rectifier unit on an aircraft comprises a plurality of converter modules connected in parallel between an input and an output. Each converter module in the plurality of converter modules comprises a transformer rectifier unit. The plurality of converter modules are controlled by a controller to provide regulated direct current power at the output from alternating current power provided at the input from an alternating current power source on the aircraft.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: August 20, 2019
    Assignee: The Boeing Company
    Inventors: Evelyn Marie Matheson, Kamiar J. Karimi, Mehdy Barekatein, Eugene V. Solodovnik, Sheverria Antony Aikens, Mark Eugene Liffring
  • Stable electrical power system with regulated transformer rectifier unit
    Patent number: 9762064
    Abstract: A method and apparatus for providing power stably for direct current loads. A regulated transformer rectifier unit is controlled to provide regulated direct current power for the direct current loads at an output of the regulated transformer rectifier unit from alternating current power provided by an alternating current power source to an input of the regulated transformer rectifier unit. The direct current loads comprise passive direct current loads and active direct current loads comprising active switching power supplies. The direct current loads have at least one of constant power characteristics, resistive power characteristics, inductive power characteristics, and capacitive power characteristics. A source impedance at the output of the regulated transformer rectifier unit is determined based on an aggregate load impedance of the direct current loads and stability criterion.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: September 12, 2017
    Assignee: THE BOEING COMPANY
    Inventors: Kamiar J. Karimi, Mark Eugene Liffring, Evelyn Marie Matheson, Sheverria Antony Aikens, Eugene V. Solodovnik, Mehdy Barekatein
  • Regulated Transformer Rectifier Unit for Aircraft Systems
    Publication number: 20160144974
    Abstract: A method and apparatus for providing regulated direct current power for a direct current load on an aircraft. A regulated transformer rectifier unit on an aircraft comprises a plurality of converter modules connected in parallel between an input and an output. Each converter module in the plurality of converter modules comprises a transformer rectifier unit. The plurality of converter modules are controlled by a controller to provide regulated direct current power at the output from alternating current power provided at the input from an alternating current power source on the aircraft.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 26, 2016
    Inventors: Evelyn Marie Matheson, Kamiar J. Karimi, Mehdy Barekatein, Eugene V. Solodovnik, Sheverria Antony Aikens, Mark Eugene Liffring
  • Stable Electrical Power System with Regulated Transformer Rectifier Unit
    Publication number: 20160149404
    Abstract: A method and apparatus for providing power stably for direct current loads. A regulated transformer rectifier unit is controlled to provide regulated direct current power for the direct current loads at an output of the regulated transformer rectifier unit from alternating current power provided by an alternating current power source to an input of the regulated transformer rectifier unit. The direct current loads comprise passive direct current loads and active direct current loads comprising active switching power supplies. The direct current loads have at least one of constant power characteristics, resistive power characteristics, inductive power characteristics, and capacitive power characteristics. A source impedance at the output of the regulated transformer rectifier unit is determined based on an aggregate load impedance of the direct current loads and stability criterion.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 26, 2016
    Inventors: Kamiar J. Karimi, Mark Eugene Liffring, Evelyn Marie Matheson, Sheverria Antony Aikens, Eugene V. Solodovnik, Mehdy Barekatein