Patents by Inventor James Widdis

James Widdis 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).

  • Stepped waveform VSCF system with engine start capability
    Patent number: 5387859
    Abstract: A power converter that can be used either as a start converter or as a variabe speed constant frequency converter is utilized within a stepped waveform VSCF system having engine start capability. Interfacing with the converter are a load bus, a contactor, a field excitation controller and a starter/generator having a main generator, an exciter generator and a permanent magnet generator. Magnetic components and semiconductor components perform multi-functions and minimal degradation of input power quality occurs.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: February 7, 1995
    Assignee: AlliedSignal Inc.
    Inventors: Muthu K. Murugan, Robert C. Eckenfelder, James Widdis