Patents by Inventor Esie Ramezani

Esie Ramezani 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).

  • Converter and a method for controlling a converter
    Patent number: 6995994
    Abstract: The invention relates to a converter provided with a resonant circuit (16), which converter comprises a device (31) for measuring the derivative (dI/dt) of the current through the current valves 82, 3) and a detection device (32) co-operating with said measuring device (31) for detecting a short-circuit in the converter, the detection device (32) being adapted to detect a short-circuit current when the current derivative (dI/dt) measured by the measuring device (31) is equal to or exceeds a stipulated current derivative limit value (dI/dtlim) during a length of time exceeding a stipulated time limit value (tlim). The invention also relates to a method for controlling such a converter.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: February 7, 2006
    Assignee: ABB AB
    Inventors: Bo Bijlenga, Peter Lundberg, Tomas Jonsson, Nicklas Johansson, Esie Ramezani
  • Converter and a method for controlling a converter
    Publication number: 20040240240
    Abstract: The invention relates to a converter provided with a resonant circuit (16), which converter comprises a device (31) for measuring the derivative (dI/dt) of the current through the current valves 82, 3) and a detection device (32) co-operating with said measuring device (31) for detecting a short-circuit in the converter, the detection device (32) being adapted to detect a short-circuit current when the current derivative (dI/dt) measured by the measuring device (31) is equal to or exceeds a stipulated current derivative limit value (dI/dtlim) during a length of time exceeding a stipulated time limit value (tlim). The invention also relates to a method for controlling such a converter.
    Type: Application
    Filed: March 2, 2004
    Publication date: December 2, 2004
    Inventors: Bo Bijlenga, Peter Lundberg, Tomas Jonsson, Nicklas Johansson, Esie Ramezani