Patents Assigned to Yoshizo Obata
  • Patent number: 4376295
    Abstract: There is disclosed a system for predicting desynchronization of a synchronous machine by detecting a phenomenon of radical variation of the magnetic flux in the gap of a synchronous machine immediately before falling in an asynchronous state. For example, a functional value of the fundamental harmonic component and that of the higher harmonic component of the flux in the gap are detected for comparing the variation of each functional value with a predetermined reference level to predict desynchronization of the synchronous machine.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: March 8, 1983
    Assignees: Fuji Electric Co. Ltd., Yoshizo Obata
    Inventors: Chikasa Uenosono, Takao Okada, Junya Matsuki, Tadashi Naito, Shinichiro Inoue, Yoshizo Obata