Patents by Inventor Tomomi IKEGAMI

Tomomi IKEGAMI 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).

  • Partial discharge measurement device
    Patent number: 10444273
    Abstract: A partial discharge measurement device includes: an impulse voltage application unit; a measurement control unit; and first and second partial discharge detection unit. The measurement control unit includes: a first and a second detector level partial discharge counting unit; and a partial discharge resistance evaluation unit. Each of the first and the second detector level partial discharge counting units outputs a first or second detection signal when the first or second detection signal exceeds a predetermined specified value. The partial discharge resistance evaluation unit counts the number of occurrences of partial discharge based on an output from the first and second detector level partial discharge counting unit, and regards the impulse voltage value at which the count value has reached a predetermined value as a partial discharge inception voltage under the repeated impulse voltage application.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: October 15, 2019
    Assignees: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBA, TOSHIBA INDUSTRIAL PRODUCTS AND SYSTEMS CORPORATION
    Inventors: Tomomi Ikegami, Tetsuo Yoshimitsu, Takayuki Sakurai, Tatsuya Hirose, Satoshi Hiroshima, Yuji Yamamoto
  • PARTIAL DISCHARGE MEASUREMENT DEVICE
    Publication number: 20170038424
    Abstract: A partial discharge measurement device includes: an impulse voltage application unit; a measurement control unit; and first and second partial discharge detection unit. The measurement control unit includes: a first and a second detector level partial discharge counting unit; and a partial discharge resistance evaluation unit. Each of the first and the second detector level partial discharge counting units outputs a first or second detection signal when the first or second detection signal exceeds a predetermined specified value. The partial discharge resistance evaluation unit counts the number of occurrences of partial discharge based on an output from the first and second detector level partial discharge counting unit, and regards the impulse voltage value at which the count value has reached a predetermined value as a partial discharge inception voltage under the repeated impulse voltage application.
    Type: Application
    Filed: April 21, 2015
    Publication date: February 9, 2017
    Applicants: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Kabushiki Kaisha Toshiba, TOSHIBA INDUSTRIAL PRODUCTS AND SYSTEMS CORPORATION
    Inventors: Tomomi IKEGAMI, Tetsuo YOSHIMITSU, Takayuki SAKURAI, Tatsuya HIROSE, Satoshi HIROSHIMA, Yuji YAMAMOTO