Patents by Inventor Hoai Nam LE

Hoai Nam LE 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 conversion device
    Patent number: 10992240
    Abstract: A power conversion device which reduces switching losses and stabilizes the output power. A switching-mode changer generates a reference signal for switching a mode of operation of the full-bridge circuit to a first switching mode or a second switching mode. In the first switching mode, an upper arm and a lower arm are switched synchronously, and a lower arm and an upper arm are non-conducting. In the second switching mode, the lower arm and the upper arm are switched synchronously, and the upper arm and the lower arm are non-conducting. The switching-mode changer adjusts the phase of the reference signal so that the reactive power is reduced.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: April 27, 2021
    Assignees: Mitsubishi Electric Corporation, National University Corporation Nagaoka University of Technology
    Inventors: Yu Kawai, Tatsuya Okuda, Jun-ichi Itoh, Hoai Nam Le
  • POWER CONVERSION DEVICE
    Publication number: 20200295674
    Abstract: A power conversion device which reduces switching losses and stabilizes the output power. A switching-mode changer generates a reference signal for switching a mode of operation of the full-bridge circuit to a first switching mode or a second switching mode. In the first switching mode, an upper arm and a lower arm are switched synchronously, and a lower arm and an upper arm are non-conducting. In the second switching mode, the lower arm and the upper arm are switched synchronously, and the upper arm and the lower arm are non-conducting. The switching-mode changer adjusts the phase of the reference signal so that the reactive power is reduced.
    Type: Application
    Filed: September 20, 2018
    Publication date: September 17, 2020
    Applicants: Mitsubishi Electric Corporation, National University Corporation Nagaoka University of Technology
    Inventors: Yu KAWAI, Tatsuya OKUDA, Jun-ichi ITOH, Hoai Nam LE
  • Composite gas separation membranes
    Patent number: 6605140
    Abstract: A polysulfone-zeolite composite membrane can be used to separate gas pairs such as hydrogen/carbon dioxide. Zeolite, preferably zeolite 3A particles are covalently bonded to the polymer using an aminofunctional methoxysilane as a coupling agent to bind the zeolite particles to an aldehyde modified polysulfone matrix.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: August 12, 2003
    Assignee: National Research Council of Canada
    Inventors: Michael D. Guiver, Hoai Nam Le Thi, Gilles P. Robertson
  • Composite gas separation membranes
    Publication number: 20020062737
    Abstract: A polysulfone—zeolite composite membrane can be used to separate gas pairs such as hydrogen/carbon dioxide. Zeolite, preferably zeolite 3A particles are covalently bonded to the polymer using an aminofunctional methoxysilane as a coupling agent to bind the zeolite particles to an aldehyde modified polysulfone matrix.
    Type: Application
    Filed: August 8, 2001
    Publication date: May 30, 2002
    Inventors: Michael D. Guiver, Hoai Nam Le Thi, Gilles P. Robertson