Patents by Inventor Toshie KIKUCHI

Toshie KIKUCHI 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 system, power converter controlling apparatus, and electric vehicle having the power system
    Patent number: 9654031
    Abstract: A controlling apparatus includes a storage unit for storing, for each sampling period, a combination of a primary frequency of connected induction motors and the amplitude of a voltage command value, and a gradient detection unit for calculating a value corresponding to an increase in the amplitude of the voltage command value divided by an increase in the primary frequency, and for outputting a failure signal upon determining, when a result of the division is less than a predetermined reference value, that the plurality of induction motors include at least one induction motor having a phase sequence that includes incorrect wiring with respect to the power converter.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: May 16, 2017
    Assignees: CENTRAL JAPAN RAILWAY COMPANY, FUJI ELECTRIC CO., LTD.
    Inventors: Kei Sakanoue, Hirokazu Kato, Hiroki Shimoyama, Tomotaka Nishijima, Junichi Ishii, Yasushi Matsumoto, Toshie Kikuchi
  • POWER SYSTEM, POWER CONVERTER CONTROLLING APPARATUS, AND ELECTRIC VEHICLE HAVING THE POWER SYSTEM
    Publication number: 20160285395
    Abstract: A controlling apparatus includes a storage unit for storing, for each sampling period, a combination of a primary frequency of connected induction motors and the amplitude of a voltage command value, and a gradient detection unit for calculating a value corresponding to an increase in the amplitude of the voltage command value divided by an increase in the primary frequency, and for outputting a failure signal upon determining, when a result of the division is less than a predetermined reference value, that the plurality of induction motors include at least one induction motor having a phase sequence that includes incorrect wiring with respect to the power converter.
    Type: Application
    Filed: June 8, 2016
    Publication date: September 29, 2016
    Applicants: CENTRAL JAPAN RAILWAY COMPANY, FUJI ELECTRIC CO., LTD.
    Inventors: Kei SAKANOUE, Hirokazu KATO, Hiroki SHIMOYAMA, Tomotaka NISHIJIMA, Junichi ISHII, Yasushi MATSUMOTO, Toshie KIKUCHI