Patents by Inventor Chieko UMENO

Chieko UMENO 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 apparatus and power conversion system
    Patent number: 11881710
    Abstract: A power conversion system includes plural power conversion apparatuses and a server connected to each of the plural power conversion apparatuses. Each of the plural power conversion apparatuses includes a power conversion circuit interconnected with a power system, a calculating unit configured to calculate, based on an output current and an output voltage of the power conversion circuit, at least one information of reactive power and a reactive current output by the power conversion circuit, a storing unit configured to accumulate, in a storage device, time-series reactive power information which is information associating time and the at least one information calculated by the calculating unit, and a communication interface configured to transmit the time-series reactive power information stored in the storage device to the server. The server is constructed to collect the time-series reactive power information of each of the plural power conversion apparatuses via the communication interface.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: January 23, 2024
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Chieko Umeno, Tatsuaki Ambo
  • POWER CONVERSION APPARATUS AND POWER CONVERSION SYSTEM
    Publication number: 20220320863
    Abstract: A power conversion system includes plural power conversion apparatuses and a server connected to each of the plural power conversion apparatuses. Each of the plural power conversion apparatuses includes a power conversion circuit interconnected with a power system, a calculating unit configured to calculate, based on an output current and an output voltage of the power conversion circuit, at least one information of reactive power and a reactive current output by the power conversion circuit, a storing unit configured to accumulate, in a storage device, time-series reactive power information which is information associating time and the at least one information calculated by the calculating unit, and a communication interface configured to transmit the time-series reactive power information stored in the storage device to the server. The server is constructed to collect the time-series reactive power information of each of the plural power conversion apparatuses via the communication interface.
    Type: Application
    Filed: July 2, 2019
    Publication date: October 6, 2022
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Chieko UMENO, Tatsuaki AMBO
  • Fault detecting apparatus and detecting method of the same
    Patent number: 9863992
    Abstract: There is provided a fault detecting apparatus for detecting a fault in an electric circuit including connecting circuits and an aggregating circuit. The fault detecting apparatus includes a fault detector that detects a fault when at least one of connecting circuit current detectors detects that a current flows and an aggregating current detector detects that a current does not flow.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: January 9, 2018
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Tatsuaki Ambo, Eiichi Ikawa, Chieko Umeno
  • FAULT DETECTING APPARATUS AND DETECTING METHOD OF THE SAME
    Publication number: 20140306713
    Abstract: There is provided a fault detecting apparatus for detecting a fault in an electric circuit including connecting circuits and an aggregating circuit. The fault detecting apparatus includes a fault detector that detects a fault when at least one of connecting circuit current detectors detects that a current flows and an aggregating current detector detects that a current does not flow.
    Type: Application
    Filed: June 25, 2014
    Publication date: October 16, 2014
    Applicant: TOSHIBA MITSUBISHI ELECTRIC INDUSTRIAL SYS. CORP.
    Inventors: Tatsuaki AMBO, Eiichi IKAWA, Chieko UMENO