Patents by Inventor Tokuo Emura

Tokuo Emura 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).

  • Isolated operation prevention device for distributed power supply and interharmonic detection method
    Patent number: 6545885
    Abstract: A power fluctuation monitoring unit which monitors and detects the power fluctuation at a receiving point 9 by means of the measurement results of the voltage at injection point 14 of an intermediate-order harmonic current and the current at incoming line 10, a power compensation unit which forms the compensation power injection signal for canceling out the power fluctuation based on the detection results of the power fluctuation, and an inverter device 18 which is driven and controlled by the signal resulting from the addition of the intermediate-order harmonic current injection signal and the compensation power injection signal and injects the intermediate-order harmonic current and the compensation power into the injection point, are equipped.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: April 8, 2003
    Assignee: Nissin Electric Co., Ltd.
    Inventors: Shoji Nishimura, Yoshifumi Minowa, Masakuni Asano, Noriaki Tokuda, Tokuo Emura, Yoshihiro Hada
  • Isolated operation prevention device for distributed power supply and interharmonic detection method
    Publication number: 20020039299
    Abstract: A power fluctuation monitoring unit which monitors and detects the power fluctuation at a receiving point 9 by means of the measurement results of the voltage at injection point 14 of an intermediate-order harmonic current and the current at incoming line 10, a power compensation unit which forms the compensation power injection signal for canceling out the power fluctuation based on the detection results of the power fluctuation, and an inverter device 18 which is driven and controlled by the signal resulting from the addition of the intermediate-order harmonic current injection signal and the compensation power injection signal and injects the intermediate-order harmonic current and the compensation power into the injection point, are equipped.
    Type: Application
    Filed: March 13, 2001
    Publication date: April 4, 2002
    Applicant: NISSIN ELECTRIC CO., LTD.
    Inventors: Shoji Nishimura, Yoshifumi Minowa, Masakuni Asano, Noriaki Tokuda, Tokuo Emura, Yoshihiro Hada
  • Fault location method for a parallel two-circuit transmission line with n terminals
    Patent number: 5485394
    Abstract: A method of locating a fault point in a parallel two-circuit transmission line in an n-terminal system. When a single fault occurs at one place in one circuit of the transmission line and when a multiple fault occurs at the same place in the two circuits, a distance to the fault may be calculated by the method of this invention.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: January 16, 1996
    Assignees: Nissin Electric Company, Limited, The Kansai Electric Power Co., Inc.
    Inventors: Kenji Murata, Kazuo Sonohara, Susumu Ito, Kyoji Ishizu, Tokuo Emura