Patents by Inventor A. J. Edwards

A. J. Edwards 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).

  • Rectifier leakage compensated alternator phase detection system and method
    Patent number: 5449999
    Abstract: An alternator phase detection system for an alternator has a stator winding (115) that provides a stator winding signal bounded within a range. The stator winding signal has a leakage magnitude when the alternator is stationary and a charging magnitude when the alternator is rotating. A leakage compensation circuit (245, 247) biases the stator winding (115) of the alternator by providing a leakage compensation current to the stator winding if the leakage magnitude of the stator winding signal is positioned apart from a boundary of the range, thereby changing the magnitude of the stator winding signal which negates the erroneous effect of rectifier leakage on measurement of alternator motion. A comparator circuit (101) provides an alternator startup state of a status signal (137) if the magnitude of the stator winding signal does noir exceed a predetermined threshold.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: September 12, 1995
    Assignee: Motorola, Inc.
    Inventor: A. J. Edwards