Patents by Inventor John M. Ulliman

John M. Ulliman 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).

  • Electrical power system for a watercraft
    Patent number: 11794872
    Abstract: An electrical power system for a watercraft including a first electrical power plant configured to operate in a variable frequency mode to output variable frequency power to a first electrical network and a fixed frequency mode to output fixed frequency power to a second electrical network. There is a first electrical load including a first high temperature superconductor (HTS) motor connected to the first electrical network and a second electrical load connected to a second electrical network. A controller selectively connects the first electrical power plant to the first electrical network and operates the first electrical power plant in a variable frequency mode to output variable frequency power to power the first HTS motor and selectively connects the first electrical power plant to the second electrical network and operates the first electrical power plant in a fixed frequency mode to output fixed frequency power to power the second electrical load.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: October 24, 2023
    Assignee: American Superconductor Corporation
    Inventors: John M. Ulliman, Timothy MacDonald, Stephen I. Callis
  • ELECTRICAL POWER SYSTEM FOR A WATERCRAFT
    Publication number: 20220169354
    Abstract: An electrical power system for a watercraft including a first electrical power plant configured to operate in a variable frequency mode to output variable frequency power to a first electrical network and a fixed frequency mode to output fixed frequency power to a second electrical network. There is a first electrical load including a first high temperature superconductor (HTS) motor connected to the first electrical network and a second electrical load connected to a second electrical network. A controller selectively connects the first electrical power plant to the first electrical network and operates the first electrical power plant in a variable frequency mode to output variable frequency power to power the first HTS motor and selectively connects the first electrical power plant to the second electrical network and operates the first electrical power plant in a fixed frequency mode to output fixed frequency power to power the second electrical load.
    Type: Application
    Filed: December 1, 2020
    Publication date: June 2, 2022
    Inventors: John M. Ulliman, Timothy MacDonald, Stephen I. Callis
  • Hybrid electrical and mechanical propulsion and energy system for a ship
    Patent number: 10669001
    Abstract: A hybrid electrical and mechanical ship propulsion and electric power system, includes a first mechanical power plant configured to drive a first propeller via a first shaft. There is a second electrical power plant configured to drive a second propeller via a second shaft. The second electrical power plant includes HTS generators and a high temperature superconductor (HTS) motor interconnected to the second shaft. There is a first electrical network to which the HTS motor is connected in order to energize the HTS motor to drive the second propeller via the second shaft.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: June 2, 2020
    Inventors: John M. Ulliman, Douglas C. Folts, Bruce Gamble, Stephen I. Callis
  • HYBRID ELECTRICAL AND MECHANICAL PROPULSION AND ENERGY SYSTEM FOR A SHIP
    Publication number: 20190176951
    Abstract: A hybrid electrical and mechanical ship propulsion and electric power system, includes a first mechanical power plant configured to drive a first propeller via a first shaft. There is a second electrical power plant configured to drive a second propeller via a second shaft. The second electrical power plant includes HTS generators and a high temperature superconductor (HTS) motor interconnected to the second shaft. There is a first electrical network to which the HTS motor is connected in order to energize the HTS motor to drive the second propeller via the second shaft.
    Type: Application
    Filed: December 4, 2018
    Publication date: June 13, 2019
    Inventors: John M. Ulliman, Douglas C. Folts, Bruce Gamble, Stephen I. Callis