Patents by Inventor Bernard Davat

Bernard Davat 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).

  • Active filtering device for a power supply
    Patent number: 8742734
    Abstract: The invention relates to an active filter device for a power supply comprising a source having a source of current iS and a voltage VE, a power converter presenting an input inductor L, a power switch T controlled by a chopper signal and delivering an output voltage VS, and a load, the device being characterized in that it includes an active filter converter (10) for generating at its output a compensation current minus harmonics of the source current due to the chopping, in response to an input signal representative of the chopping of the power converter.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: June 3, 2014
    Assignees: Centre National de la Recherche Scientifque, Institut National Polytechnique de Lorraine, Universite Henri Poincare
    Inventors: Jean-Philippe Martin, Serge Lionel Pierfederici, Bernard Davat, Farid Meibody-Tabar
  • ACTIVE FILTERING DEVICE FOR A POWER SUPPLY
    Publication number: 20100148743
    Abstract: The invention relates to an active filter device for a power supply comprising a source having a source of current iS and a voltage VE, a power converter presenting an input inductor L, a power switch T controlled by a chopper signal and delivering an output voltage VS, and a load, the device being characterized in that it includes an active filter converter (10) for generating at its output a compensation current minus harmonics of the source current due to the chopping, in response to an input signal representative of the chopping of the power converter.
    Type: Application
    Filed: March 7, 2008
    Publication date: June 17, 2010
    Inventors: Jean-Philippe Martin, Serge Lionel Pierfederici, Bernard Davat, Farid Meibody-Tabar
  • Supercapacitor balancing method and system
    Patent number: 6777917
    Abstract: The present invention relates to a method of and a system for charging at least one supercapacitor that is particularly suitable for balancing supercapacitors.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: August 17, 2004
    Assignee: Alcatel
    Inventors: Philippe Desprez, Gérard Barrailh, Pascal Lavaur, Stéphane Raël, Fadi Sharif, Bernard Davat
  • Supercapacitor balancing method and system
    Patent number: 6664766
    Abstract: The present invention relates to a supercapacitor balancing method including bypassing the current flowing in the supercapacitor from a predetermined threshold voltage at the terminals of the supercapacitor, the bypass current being a function of the voltage at the terminals of the supercapacitor and increasing continuously as a function of the voltage. The method is characterized in that the bypass current increases between the threshold voltage, for which the bypass current constitutes a minimum bypass current, and a reference voltage, for which the bypass current constitutes a nominal bypass current, and in that the difference between the reference voltage and the threshold voltage is less than 200 mV and the ratio between the nominal bypass current and the minimum bypass current is greater than 100.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: December 16, 2003
    Assignee: Alcatel
    Inventors: Philippe Desprez, Gérard Barrailh, Damien Rochard, Stéphane Raël, Fadi Sharif, Bernard Davat
  • Supercapacitor balancing method and system
    Publication number: 20030062876
    Abstract: The present invention relates to a supercapacitor balancing method including bypassing the current flowing in the supercapacitor from a predetermined threshold voltage at the terminals of the supercapacitor, the bypass current being a function of the voltage at the terminals of the supercapacitor and increasing continuously as a function of the voltage.
    Type: Application
    Filed: June 17, 2002
    Publication date: April 3, 2003
    Applicant: ALCATEL
    Inventors: Philippe Desprez, Gerard Barrailh, Damien Rochard, Stephane Rael, Fadi Sharif, Bernard Davat
  • Supercapacitor balancing method and system
    Publication number: 20030020435
    Abstract: The present invention relates to a method of and a system for charging at least one supercapacitor that is particularly suitable for balancing supercapacitors.
    Type: Application
    Filed: June 17, 2002
    Publication date: January 30, 2003
    Applicant: ALCATEL
    Inventors: Philippe Desprez, Gerard Barrailh, Pascal Lavaur, Stephane Rael, Fadi Sharif, Bernard Davat