Patents by Inventor Jean-Louis Sanhet

Jean-Louis Sanhet 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).

  • Power converter with improved control of its main switches, and application to a power converter having three or more voltage levels
    Patent number: 6046920
    Abstract: A power converter having two main switches connecting an outlet either to a positive rail or to a negative rail, two free-wheel diodes enabling the current through the load to be maintained, two snubber capacitors, and an auxiliary circuit. The auxiliary circuit includes an auxiliary inductor in series with two auxiliary switches coupled between the outlet and a midpoint of a capacitive voltage divider that provides a midpoint voltage. A detector detects current oscillation between the auxiliary inductor and the snubber capacitors, and then switches off the oscillation current and allows the intended main switch to conduct in response to the interruption.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: April 4, 2000
    Assignee: Alcatel
    Inventors: Stephane Cazabat, Christian Delay, Jean-Louis Sanhet, David Rudniski