Patents by Inventor Philippe Ladoux

Philippe Ladoux 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).

  • Induction heating method implemented in a device including magnetically coupled inductors
    Patent number: 9398643
    Abstract: Provided is an induction heating method implemented in a device for heating a metal part, the device including magnetically coupled inductors. Oscillating circuits of the device have at least approximately the same resonance frequency, each inverter is controlled by a control unit to vary amplitude and phase of current passing through the corresponding inductor, the device also including a means for determining said current and an actual temperature profile of said part. The method includes: a) comparing said actual temperature profile with a reference temperature profile and calculating a reference power density profile; b) calculating target currents which the inverters must produce in order for the currents of the inductors to reach suitable target values; c) determining the currents passing through the inductors to compare said currents with said target values and determine correction current deviations, and sending correction instructions to said control units in accordance with said current deviations.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: July 19, 2016
    Assignees: Electricite de France, Centre National de la Recherche Scientifique—CNRS, Institut National Polytechnique de Toulouse
    Inventors: Olivier Pateau, Yves Neau, Yvan Lefevre, Philippe Ladoux, Pascal Maussion, Gilbert Manot
  • INDUCTION HEATING METHOD IMPLEMENTED IN A DEVICE INCLUDING MAGNETICALLY COUPLED INDUCTORS
    Publication number: 20120199579
    Abstract: Provided is an induction heating method implemented in a device for heating a metal part, the device including magnetically coupled inductors. Oscillating circuits of the device have at least approximately the same resonance frequency, each inverter is controlled by a control unit to vary amplitude and phase of current passing through the corresponding inductor, the device also including a means for determining said current and an actual temperature profile of said part. The method includes: a) comparing said actual temperature profile with a reference temperature profile and calculating a reference power density profile; b) calculating target currents which the inverters must produce in order for the currents of the inductors to reach suitable target values; c) determining the currents passing through the inductors to compare said currents with said target values and determine correction current deviations, and sending correction instructions to said control units in accordance with said current deviations.
    Type: Application
    Filed: October 19, 2010
    Publication date: August 9, 2012
    Applicants: ELECTRICITE DE FRANCE, INSTITUT NATIONAL POLYTECHNIQUE DE TOULOUSE, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE - CNRS
    Inventors: Olivier Pateau, Yves Neau, Yvan Lefevre, Philippe Ladoux, Pascal Maussion, Gilbert Manot