Patents by Inventor Laid Kefsi

Laid Kefsi 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).

  • Patent number: 11523548
    Abstract: The invention is a power electronic system comprising at least one power electronic component implemented at least partly on at least one circuit board. The circuit boards are planar and circular or toroidal in shape with the center thereof comprising a circular opening having a diameter D cooperating with a hose for circulating a flow.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: December 6, 2022
    Assignee: IFP ENERGIES NOUVELLES
    Inventors: Alexandre Battiston, Laid Kefsi, Fabrice Le Berr
  • Publication number: 20220263451
    Abstract: The invention relates to a drive system comprising an inverter a first input, a second input and N outputs, a rotary machine comprising a stator and a rotor comprising at least one magnetic element made from a modular magnetization material, an output switching device connected between a common point and the second input, and a control device which simultaneously during magnetization of the at least one magnetic element step controls the output switching device to be on for a predetermined magnetization time interval, and controls the inverter to connect during the magnetization time interval, the first input to at least one and at most N-1 outputs.
    Type: Application
    Filed: September 24, 2020
    Publication date: August 18, 2022
    Inventors: Alexandre BATTISTON, Laid KEFSI, Siyamak SARABI
  • Patent number: 11323012
    Abstract: The invention is a device (1) for cooling a power electronic system (EP) comprising at least one power electronic component (2) mounted on at least one circuit board (3), the cooling device (1) comprises a hose (4) for circulating a flow (5) at an ambient temperature. The cooling device (1) comprises a first heat exchange surface (6) that is thermally connected to the power electronic components (2) and at least one second heat exchange surface (7). The second heat exchange surface (7) is for heat exchange with the flow (5) circulating through the hose. The second heat exchange surface (7) is fitted inside the circulation hose (4) to remove heat by convection with the circulating flow (5). The second heat exchange surface (7) is thermally connected to the first heat exchange surface (6).
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: May 3, 2022
    Assignee: IFP ENERGIES NOUVELLES
    Inventors: Alexandre Battiston, Laid Kefsi, Fabrice Le Berr
  • Publication number: 20200329591
    Abstract: The invention is a power electronic system comprising at least one power electronic component implemented at least partly on at least one circuit board. The circuit boards are planar and circular or toroidal in shape with the center thereof comprising a circular opening having a diameter D cooperating with a hose for circulating a flow.
    Type: Application
    Filed: November 28, 2018
    Publication date: October 15, 2020
    Inventors: Alexandre BATTISTON, Laid KEFSI, Fabrice LE BERR
  • Publication number: 20200321838
    Abstract: The invention is a device (1) for cooling a power electronic system (EP) comprising at least one power electronic component (2) mounted on at least one circuit board (3), the cooling device (1) comprises a hose (4) for circulating a flow (5) at an ambient temperature. The cooling device (1) comprises a first heat exchange surface (6) that is thermally connected to the power electronic components (2) and at least one second heat exchange surface (7). The second heat exchange surface (7) is for heat exchange with the flow (5) circulating through the hose. The second heat exchange surface (7) is fitted inside the circulation hose (4) to remove heat by convection with the circulating flow (5). The second heat exchange surface (7) is thermally connected to the first heat exchange surface (6).
    Type: Application
    Filed: November 28, 2018
    Publication date: October 8, 2020
    Inventors: Alexandre BATTISTON, Laid KEFSI, Fabrice LE BERR
  • Publication number: 20200016991
    Abstract: The invention relates to a conversion device (4) allowing electrical energy to be transferred between a DC network (6) and an AC network (10), the conversion device (4) including: a DC-to-DC converter (12) comprising a first switch (20), a second switch (22), and a low-voltage branch (16) and a high-voltage branch (18), each comprising two sub-branches (34) in series, each sub-branch (34) comprising a switching module (38); an AC-to-DC converter (14); a controller (15) that is configured to control the closed or open state of the first switch (20), of the second switch (22) and of each switching module (38), the controller (15) being, additionally, configured to control the AC-to-DC converter (14) for transferring electrical energy from the DC-to-DC converter (12) to the AC network (10), or from the AC network (10) to the DC-to-DC converter (12).
    Type: Application
    Filed: September 22, 2017
    Publication date: January 16, 2020
    Applicant: IFP Energies Nouvelles
    Inventors: El Hadj MILIANI, Laid KEFSI, Ismail ZEIN
  • Patent number: 9000740
    Abstract: A current reversible DC/DC double-boost quadratic converter, capable of performing high transformation ratios.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: April 7, 2015
    Assignees: IFP Energies Nouvelles, Universite de Poitiers
    Inventors: Youssef Touzani, Laid Kefsi, Gerard Champenois, Jean-Paul Gaubert
  • Publication number: 20130119966
    Abstract: A current reversible DC/DC double-boost quadratic converter, capable of performing high transformation ratios.
    Type: Application
    Filed: July 29, 2011
    Publication date: May 16, 2013
    Applicants: UNIVERSITE DE POITIERS, IFP ENERGIES NOUVELLES
    Inventors: Youssef Touzani, Laid Kefsi, Gerard Champenois, Jean-Paul Gaubert