Patents by Inventor Michael Frederick Johnson

Michael Frederick Johnson 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).

  • Electric motor
    Patent number: 7795830
    Abstract: An electric motor (10) which includes an armature (11) with at least two armature phase pair windings (12) and salient pole rotor arrangement (15) having field windings (17) terminating in a selective electrical switch which determines the electrical continuity of said field windings (17). Also included is control means which is configured to regulate the magnetizing of the field winding (17) so that, at any given moment, one armature phase pair is usable for magnetizing the field winding while the other pair is responsible for torque production.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: September 14, 2010
    Assignee: Elckon Limited
    Inventor: Michael Frederick Johnson
  • Electric Motor
    Publication number: 20090179604
    Abstract: An electric motor (10) which includes an armature (11) with at least two armature phase pair windings (12) and salient pole rotor arrangement (15) having field windings (17) terminating in a selective electrical switch which determines the electrical continuity of said field windings (17). Also included is control means which is configured to regulate the magnetizing of the field winding (17) so that, at any given moment, one armature phase pair is usable for magnetizing the field winding whilst the other pair is responsible for torque production.
    Type: Application
    Filed: July 6, 2005
    Publication date: July 16, 2009
    Inventor: Michael Frederick Johnson