Patents by Inventor Donald Grahame HOLMES

Donald Grahame HOLMES 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).

  • DC to DC converter for a vehicle alternator
    Patent number: 11462997
    Abstract: A direct-current (DC) converter for a permanent-magnet (PM) alternator for a vehicle, the DC converter including one or more pairs of step-down converters that are electrically in parallel operating at a fundamental switching frequency, wherein the two step-down converters in each pair are arranged to be switched out of phase, and wherein the two step-down converters in each pair are arranged adjacent to each other to mitigate conducted electromagnetic interference (EMI).
    Type: Grant
    Filed: September 2, 2019
    Date of Patent: October 4, 2022
    Assignee: MILSPEC TECHNOLOGIES PTY LTD
    Inventors: Donald Grahame Holmes, Patrick McGoldrick, Andrew McIver, Noel Gordon, Bradley Hewitt
  • A DC TO DC CONVERTER FOR A VEHICLE ALTERNATOR
    Publication number: 20210328505
    Abstract: A direct-current (DC) converter for a permanent-magnet (PM) alternator for a vehicle, the DC converter including one or more pairs of step-down converters that are electrically in parallel operating at a fundamental switching frequency, wherein the two step-down converters in each pair are arranged to be switched out of phase, and wherein the two step-down converters in each pair are arranged adjacent to each other to mitigate conducted electromagnetic interference (EMI).
    Type: Application
    Filed: September 2, 2019
    Publication date: October 21, 2021
    Inventors: Donald Grahame HOLMES, Patrick MCGOLDRICK, Andrew MCIVER, Noel GORDON, Bradley HEWITT