Patents by Inventor Yuzuru Imamura

Yuzuru Imamura 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).

  • Electrical power distribution monitoring system and method
    Patent number: 6061609
    Abstract: An electrical power distribution monitoring system is provided for a power distribution line having a plurality of sections with a plurality of electrical loads connected to the power distribution line to form a power distribution network. The monitoring system has at least one sensor for at least one present electrical value at least one point of the network, and estimates electrical values for at least one section of the line in dependence on both of present electrical values measured by the sensor and data relating to past power consumption by loads connected to the line. Improved prediction of actual conditions in the distribution line can be obtained.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: May 9, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Kanoi, Yuzuru Imamura, Saburou Yasukawa, Kiyoji Iwashita, Toru Takei, Hiroyuki Kudo, Junzo Kawakami, Kazuo Nishijima, Hiroshi Inoue
  • Electrical power distribution monitoring system and method
    Patent number: 5963457
    Abstract: An electrical power distribution monitoring system is provided for a power distribution line having a plurality of sections with a plurality of electrical loads connected to the power distribution line to form a power distribution network. The monitoring system has at least one sensor for at least one present electrical value at at least one point of the network, and estimates electrical values for at least one section of the line in dependence on both of present electrical values measured by the sensor and data relating to past power consumption by loads connected to the line. Improved prediction of actual conditions in the distribution line can be obtained.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: October 5, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Kanoi, Yuzuru Imamura, Saburou Yasukawa, Kiyoji Iwashita, Toru Takei, Hiroyuki Kudo, Junzo Kawakami, Kazuo Nishijima, Hiroshi Inoue
  • Control system for power transmission and distribution system
    Patent number: 5760492
    Abstract: In a control system for a power transmission and distribution system, a plurality of distributed power supplying and receiving units each including a control unit are provided and connected along a power distribution line. The power supplying and receiving unit function to generate active and reactive powers of fundamental and higher harmonic waves to supply and receive the same to and from the power distribution line. A first central control unit controls the power distribution line and is designed to store information relating to the configuration of the power distribution line, to collect information with regard to instant open and close conditions of respective disconnecting switches connected for sectioning the power distribution line, and with regard to current electrical quantities on the power distribution line.
    Type: Grant
    Filed: January 1, 1996
    Date of Patent: June 2, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Kanoi, Yuzuru Imamura, Saburo Yasukawa, Masahiko Amano, Shinji Tanifuji, Toshifumi Yoshikawa, Masahiro Watanabe