Patents by Inventor Hiroshige FUJITA

Hiroshige FUJITA 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).

  • Method for assessing remaining life of rotating electrical machine and device for assessing remaining life of rotating electrical machine
    Patent number: 11885848
    Abstract: A device for assessing remaining life of a rotating electrical machine includes: a data acquisition unit configured to acquire actual running performance data and electrical data about the rotating electrical machine to be assessed; an index value calculation unit configured to calculate a first index value to a third index value based on the acquired data, and to calculate, as a fourth index value, an estimation value of a residual withstand voltage value of the rotating electrical machine by performing analysis that uses an MT method on each piece of the electrical data; and an insulation deterioration estimation unit configured to assess the remaining life of the rotating electrical machine by estimating the remaining life of the rotating electrical machine with use of four index values from the first index value to the fourth index value.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: January 30, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tadao Otani, Kazuo Hayashi, Hiroshige Fujita, Wataru Nagaya, Shinsuke Miki
  • METHOD FOR ASSESSING REMAINING LIFE OF ROTATING ELECTRICAL MACHINE AND DEVICE FOR ASSESSING REMAINING LIFE OF ROTATING ELECTRICAL MACHINE
    Publication number: 20210405117
    Abstract: A device for assessing remaining life of a rotating electrical machine includes: a data acquisition unit configured to acquire actual running performance data and electrical data about the rotating electrical machine to be assessed; an index value calculation unit configured to calculate a first index value to a third index value based on the acquired data, and to calculate, as a fourth index value, an estimation value of a residual withstand voltage value of the rotating electrical machine by performing analysis that uses an MT method on each piece of the electrical data; and an insulation deterioration estimation unit configured to assess the remaining life of the rotating electrical machine by estimating the remaining life of the rotating electrical machine with use of four index values from the first index value to the fourth index value.
    Type: Application
    Filed: November 15, 2019
    Publication date: December 30, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tadao OTANI, Kazuo HAYASHI, Hiroshige FUJITA, Wataru NAGAYA, Shinsuke MIKI