Patents by Inventor Carl J. Alleva

Carl J. Alleva 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).

  • Permanent magnet alternator speed detection circuit with feedback at lower speeds
    Patent number: 7586204
    Abstract: A permanent magnet alternator is driven by a turbine engine to supply three phases of power to a control circuit for the engine. A shunt regulator delivers current to the control circuit, and a voltage supply is also included to deliver power for a period of time as the alternator is gaining speed at startup. A speed detection circuit detects the speed of the shaft for diagnostic purposes and a feedback circuit overrides a control for the supply of the current at lower speeds such that the speed detection circuit will be accurate even at lower speeds.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: September 8, 2009
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Gary L. Hess, James A. Gosse, Carl J. Alleva
  • PERMANENT MAGNET ALTERNATOR SPEED DETECTION CIRCUIT WITH FEEDBACK AT LOWER SPEEDS
    Publication number: 20090184522
    Abstract: A permanent magnet alternator is driven by a turbine engine to supply three phases of power to a control circuit for the engine. A shunt regulator delivers current to the control circuit, and a voltage supply is also included to deliver power for a period of time as the alternator is gaining speed at startup. A speed detection circuit detects the speed of the shaft for diagnostic purposes and a feedback circuit overrides a control for the supply of the current at lower speeds such that the speed detection circuit will be accurate even at lower speeds.
    Type: Application
    Filed: January 22, 2008
    Publication date: July 23, 2009
    Inventors: Gary L. Hess, James A. Gosse, Carl J. Alleva