Patents Represented by Attorney Mike A. Jaskolski

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  • Generalized discontinuous pulse width modulator
    Patent number: 6023417
    Abstract: A method and apparatus for selecting one of several different modulating signals for use with a system including a PWM controller and an inverter to generate low frequency alternating voltages on three motor supply lines, modulating signals selected as a function of a modulating index to minimize harmonic distortion in the alternating voltages, minimize switching losses, maximize overall system gain at high modulating index values and maximize the linear range of system operation.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: February 8, 2000
    Assignee: Allen-Bradley Company, LLC
    Inventors: Ahmet M. Hava, Russel J. Kerkman
  • Soft switching three-level inverter
    Patent number: 5684688
    Abstract: A three-level NPC inverter topology including two auxiliary resonant commutation circuits which are controlled to clamp the voltage across each main inverter switch to zero voltage prior to altering the state of the switch in order to achieve soft switching of all main inverter switches while reducing output voltage harmonics and gradients.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: November 4, 1997
    Assignee: Reliance Electric Industrial Company
    Inventors: Didier G. Rouaud, Tony C. Aboumrad