Patents Represented by Attorney, Agent or Law Firm Michael A. Jaskolski
  • Method and apparatus for RMS measurements in induction motor without sampling
    Patent number: 5473241
    Abstract: A method and/or apparatus used with a motor controller for finding RMS current and RMS terminal voltage in a three phase AC induction motor using electrical values known to the controller. An equation relates average current to RMS current as a function of the duration of a known non-conducting period. Another equation relates known voltages to RMS terminal voltage as a function of a known phase angle and the known duration of the non-conducting period in a supply line.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: December 5, 1995
    Assignee: Allen-Bradley Company, Inc.
    Inventors: Li Chen, Peter Unsworth