Current Control Of Linear Piston Drive Motor Patents (Class 303/162)
  • Patent number: 5522653
    Abstract: A switched reluctance motor comprising a stator including a plurality of phase coils, a rotor rotatably mounted coaxially with the stator, a first commutator plate comprising a plurality of first contact plates wherein each phase coil of the plurality of phase coils is electrically coupled to a member of the plurality of first contact plates, a first switching device, a first rotatably mounted brush consecutively providing electrical contact between each first contact plate and the first switching device, a second switching device, a second commutator plate comprising a plurality of second contact plates wherein each phase coil of the plurality of phase coils is electrically coupled to a member of the plurality of second contact plates, a second rotatably mounted brush consecutively providing electrical contact between each second contact plate and the second switching device, wherein, when the first switching device is closed and the second switching device is open, the rotor rotates in a first direction and
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: June 4, 1996
    Assignee: General Motors Corporation
    Inventors: Gary C. Fulks, Michael A. Dimatteo
  • Patent number: 5496102
    Abstract: A brake system comprising a hydraulic brake, wherein the brake includes a displaceable braking surface, wherein the hydraulic brake requires low pressure to effect displacement during initiation of a brake apply and increased pressure to effect displacement as brake apply progresses, wherein the increased pressure exponentially increases in a non-linear response curve, a motor driven hydraulic actuator having a rotary input provided by a motor and a hydraulic output coupled to the hydraulically actuated brake, wherein the rotary input requires low torque during the initiation of brake apply to effect displacement of the hydraulically actuated brake and requires increased torque to effect rotary motion and displacement of the hydraulically actuated brake as brake apply progresses, the motor characterized by a progressively changing non-linear operation having a low torque mode and a high torque mode, and a control apparatus for the motor controlling the motor to effect displacement of the hydraulic brake, wher
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: March 5, 1996
    Assignee: General Motors Corporation
    Inventors: Michael A. Dimatteo, Schuyler S. Shaw, Michael B. Monahan, Robert J. Disser, Jeff A. Foust, Paul D. Wilkey, Gary C. Fulks