Patents Represented by Attorney Thomas R. Miller
  • Patent number: 5537019
    Abstract: A switched reluctance motor includes a rotor mounted for rotation about an axis, and having a plurality of rotor poles, and a stator surrounding the rotor and including first, second and third stator phases. The motor also includes energizing means for sequentially energizing the stator phases with an energy source to cause rotation of the rotor, based on rotor position information, the energizing means causing one phase to be energized and then deenergized to near a zero current level prior to a point where the rotor pole breaks away from the stator pole. The energizing means further includes limited current turn on means connected to switch operating means for operating a switch on the one phase to permit flow of limited current through the one phase after it reaches a near zero current level but before the break away point.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: July 16, 1996
    Assignee: A. O. Smith Corporation
    Inventors: Thomas G. Van Sistine, Ronald P. Bartos, William L. Mehlhorn, Timothy H. Houle