Patents by Inventor Shuuichi Yadoori

Shuuichi Yadoori 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).

  • Patent number: 7598748
    Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: October 6, 2009
    Assignee: Fujitsu Limited
    Inventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
  • Patent number: 7492162
    Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: February 17, 2009
    Assignee: Fujitsu Limited
    Inventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
  • Patent number: 7486082
    Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: February 3, 2009
    Assignee: Fujitsu Limited
    Inventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
  • Publication number: 20070103094
    Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
    Type: Application
    Filed: December 27, 2006
    Publication date: May 10, 2007
    Applicant: Fujitsu Limited
    Inventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
  • Publication number: 20070103163
    Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
    Type: Application
    Filed: December 27, 2006
    Publication date: May 10, 2007
    Applicant: Fujitsu Limited
    Inventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori
  • Publication number: 20040012381
    Abstract: An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
    Type: Application
    Filed: July 17, 2003
    Publication date: January 22, 2004
    Applicant: Fujitsu Limited, Kawasaki, Japan
    Inventors: Seiji Hachisuka, Masaru Tanaka, Minoru Senba, Shuuichi Yadoori