Patents by Inventor John Cestra

John Cestra 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).

  • High power density inverter and components thereof
    Patent number: 6980450
    Abstract: A compact high-power pure-sinewave inverter amenable to mass manufacturing techniques. Methods for increasing the power rating, power density and/or power conversion efficiency of a sinewave-modulated pulse-width-modulated (PWM) inverter having a either half-bridge or full-bridge topology, including minimizing uncoupled inductances and loop inductances in the primary winding(s) by employing either ribbon-like conductors having a high crossectional aspect ratio or litz-wire. A compact linear heatsink adapted to cool a row of semiconductor devices (such as inverter switches) mounted on a high-current printed circuit board. Methods for inexpensive manufacture of a fluid-cooled linear heat sink. A transformer including a filter inductor core.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: December 27, 2005
    Assignee: Inverters Unlimited, Inc.
    Inventors: Suresh K. Bhate, John Cestra, Christopher B. Harrington, Leo Hoogenboom
  • High power density inverter and components thereof
    Publication number: 20040208030
    Abstract: A compact high-power pure-sinewave inverter amenable to mass manufacturing techniques. Methods for increasing the power rating, power density and/or power conversion efficiency of a sinewave-modulated pulse-width-modulated (PWM) inverter having a either half-bridge or full-bridge topology, including minimizing uncoupled inductances and loop inductances in the primary winding(s) by employing either ribbon-like conductors having a high crossectional aspect ratio or litz-wire. A compact linear heatsink adapted to cool a row of semiconductor devices (such as inverter switches) mounted on a high-current printed circuit board. Methods for inexpensive manufacture of a fluid-cooled linear heat sink. A transformer including a filter inductor core.
    Type: Application
    Filed: January 24, 2002
    Publication date: October 21, 2004
    Inventors: Suresh K. Bhate, John Cestra, Christopher B. Harrington, Leo Hoogenboom