Patents by Inventor Motohiro TSUKUTA

Motohiro TSUKUTA 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 supply device and deterioration determination method of power supply device
    Patent number: 11709207
    Abstract: A power supply device includes a controller configured to output, to a power converter, a command value to control at least one of a voltage or a current of power output from the power converter, and acquire a measurement value measured by a measurement unit. The controller is configured to, while power conversion operation is being performed by the power converter, change the command value and determine a deterioration of the power converter based on a mode of a change in the measurement value measured by the measurement unit due to a change in the command value.
    Type: Grant
    Filed: January 27, 2021
    Date of Patent: July 25, 2023
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Motohiro Tsukuta
  • Abnormality cause identifying method, abnormality cause identifying device, power converter and power conversion system
    Patent number: 11275124
    Abstract: An abnormality cause identifying method that is applied to a computer is provided. The abnormality cause identifying method includes: outputting a control parameter that is calculated based on a detection value detected from a power converter that converts power supplied from a power supply and supplies the converted power to a load; plotting, on coordinates having at least two axes, a value that is calculated using the detection value and the control parameter; and identifying an abnormality cause based on a quadrant of the coordinates on which the value is plotted.
    Type: Grant
    Filed: December 24, 2019
    Date of Patent: March 15, 2022
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Kazuyoshi Umezawa, Satoshi Ishida, Motohiro Tsukuta, Yasuyuki Noto
  • POWER SUPPLY DEVICE AND DETERIORATION DETERMINATION METHOD OF POWER SUPPLY DEVICE
    Publication number: 20210293894
    Abstract: A power supply device includes a controller configured to output, to a power converter, a command value to control at least one of a voltage or a current of power output from the power converter, and acquire a measurement value measured by a measurement unit. The controller is configured to, while power conversion operation is being performed by the power converter, change the command value and determine a deterioration of the power converter based on a mode of a change in the measurement value measured by the measurement unit due to a change in the command value.
    Type: Application
    Filed: January 27, 2021
    Publication date: September 23, 2021
    Inventor: Motohiro Tsukuta
  • ABNORMALITY CAUSE IDENTIFYING METHOD, ABNORMALITY CAUSE IDENTIFYING DEVICE, POWER CONVERTER AND POWER CONVERSION SYSTEM
    Publication number: 20200256926
    Abstract: An abnormality cause identifying method that is applied to a computer is provided. The abnormality cause identifying method includes: outputting a control parameter that is calculated based on a detection value detected from a power converter that converts power supplied from a power supply and supplies the converted power to a load; plotting, on coordinates having at least two axes, a value that is calculated using the detection value and the control parameter; and identifying an abnormality cause based on a quadrant of the coordinates on which the value is plotted.
    Type: Application
    Filed: December 24, 2019
    Publication date: August 13, 2020
    Inventors: Kazuyoshi UMEZAWA, Satoshi ISHIDA, Motohiro TSUKUTA, Yasuyuki NOTO