Patents by Inventor Gholamreza Esmalli

Gholamreza Esmalli 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).

  • Nonlinear control algorithm and system for a single-phase AC-AC converter with bidirectional isolated DC-DC converter
    Patent number: 10574086
    Abstract: A control system and hardware with a controllable input relay provides two different modes of operation—uninterruptable power supply (UPS) and mixed energy-AC support. For each operation mode, regulation of the DC-Link and neutral point balancing is guaranteed even for non-linear unsymmetrical AC loads. Moreover, in the mixed energy-AC support mode, unity power factor operation of AC input source, seamless zero current crossing, and very low total harmonic distortion (THD) is provided by the applied non-linear control algorithm. The system has a higher efficiency in comparison to other AC-DC-AC converters with smaller size and weight because of the elimination of the typical balancing circuit.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: February 25, 2020
    Assignee: RHOMBUS ENERGY SOLUTIONS, INC.
    Inventors: Hamid Reza Teymour Ghasemabadi, Gholamreza Esmalli
  • NONLINEAR CONTROL ALGORITHM AND SYSTEM FOR A SINGLE-PHASE AC-AC CONVERTER WITH BIDIRECTIONAL ISOLATED DC-DC CONVERTER
    Publication number: 20170294777
    Abstract: A control system and hardware with a controllable input relay provides two different modes of operation—uninterruptable power supply (UPS) and mixed energy-AC support. For each operation mode, regulation of the DC-Link and neutral point balancing is guaranteed even for non-linear unsymmetrical AC loads. Moreover, in the mixed energy-AC support mode, unity power factor operation of AC input source, seamless zero current crossing, and very low total harmonic distortion (THD) is provided by the applied non-linear control algorithm. The system has a higher efficiency in comparison to other AC-DC-AC converters with smaller size and weight because of the elimination of the typical balancing circuit.
    Type: Application
    Filed: April 10, 2017
    Publication date: October 12, 2017
    Inventors: Hamid Reza Teymour Ghasemabadi, Gholamreza Esmalli