Patents by Inventor Taeko Kamegawa

Taeko Kamegawa 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).

  • Ground fault detection device, ground fault detection method, solar energy system, and ground fault detection program
    Patent number: 9176201
    Abstract: In a ground fault detection device, two photovoltaic strings are disconnected from a photovoltaic power generation system, measurement for one photovoltaic string is performed by a measuring instrument, and in parallel therewith, the other photovoltaic string before measurement is charged/discharged by a charging/discharging unit by executing various functions of the calculation control unit. In other words, charging/discharging of the photovoltaic string is performed in advance at the same timing as the measurement of the photovoltaic string so that the measurement can be performed immediately after the photovoltaic string is connected to the measuring instrument in a subsequent step.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: November 3, 2015
    Assignee: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Takafumi Ishii, Taeko Kamegawa, Masanobu Yoshidomi
  • GROUND FAULT DETECTION DEVICE, GROUND FAULT DETECTION METHOD, SOLAR ENERGY SYSTEM, AND GROUND FAULT DETECTION PROGRAM
    Publication number: 20140253138
    Abstract: In a ground fault detection device, two photovoltaic strings are disconnected from a photovoltaic power generation system, measurement for one photovoltaic string is performed by a measuring instrument, and in parallel therewith, the other photovoltaic string before measurement is charged/discharged by a charging/discharging unit by executing various functions of the calculation control unit. In other words, charging/discharging of the photovoltaic string is performed in advance at the same timing as the measurement of the photovoltaic string so that the measurement can be performed immediately after the photovoltaic string is connected to the measuring instrument in a subsequent step.
    Type: Application
    Filed: July 31, 2012
    Publication date: September 11, 2014
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Takafumi Ishii, Taeko Kamegawa, Masanobu Yoshidomi