Patents by Inventor Barry L. Maltby

Barry L. Maltby 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).

  • Hydraulically driven low reactance, large air gap permanent magnet generator and voltage regulation system for use therewith
    Patent number: 5977648
    Abstract: An electric power generating system comprises a low reactance, large airgap permanent magnet generator driven by a hydraulic motor to generate a poly-phase AC output voltage. Because the permanent magnet generator is a low reluctance, large airgap machine, the output voltage regulation is low over the desired loading range of the system. The output voltage is controlled within acceptable limits by trimming the output speed of the hydraulic motor through the use of a servovalve. The control for the servovalve senses a parameter of output power and generates a speed control signal to compensate for deviations in the generator output. The system includes protection circuitry which monitors at least one parameter of the output power. This protection circuitry generates an output protection signal in response to a deviation in the monitored parameter which exceeds predetermined limits.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: November 2, 1999
    Assignee: Sundstrand Corporation
    Inventors: George H. Seffernick, Mahesh J. Shah, Barry L. Maltby