Patents Assigned to Allen-Bradley Co., Inc.
  • Gas deflection and isolation system for use with a high power circuit breaker
    Patent number: 5317117
    Abstract: A system for directing the ionized gases which can exit from the vent openings of the arc chambers in high power circuit breakers away from the line terminals of the circuit breaker and isolating these terminals from infiltration by such gases. The system includes a deflection plate, interphase barriers and end plates mounted in proximity to the vent openings and around the line terminals.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: May 31, 1994
    Assignee: Allen-Bradley Co., Inc.
    Inventors: Gary P. Bruski, Chester Malkowski, Jr.
  • Counter EMF detector for use in electric motor controllers
    Patent number: 5298847
    Abstract: A non-invasive system for accurately determining the counter EMF or speed voltages in an electric motor during motor operation. The system includes a mechanism for determining the phase angle of the stator current within the dq frame of reference and a mechanism for transforming feedback voltages into a new frame of reference defined by this phase angle. The speed voltage values thereby detected are free from stator resistance effects and represent parameters of improved accuracy which can be used in motor control functions.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: March 29, 1994
    Assignee: Allen-Bradley Co., Inc.
    Inventors: Russel J. Kerkman, Brian J. Seibel, Timothy M. Rowan