Patents by Inventor Satoru Sigeta

Satoru Sigeta 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: 7777433
    Abstract: The power converter for solving the above-described problem has a module section and a drive section for operating the module section. The drive section has a drive circuit. The drive circuit is provided so as to correspond to the first semiconductor element which is one of the semiconductor elements comprising the parallel circuit; wherein drive signals for operating the first semiconductor element are output. The drive signals that are output from the drive circuit are electrically branched and output to a second semiconductor element which is a separate semiconductor element from the first semiconductor element of the semiconductor elements comprising the parallel circuit. As a result, the second semiconductor element receives the branched drive signals and operates in the same manner as the first semiconductor element. Thereby, a motor converter favorable for control large current at a low cost is provided.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: August 17, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Koji Yamaguchi, Yuuji Maeda, Tokihito Suwa, Satoru Sigeta
  • Publication number: 20060086981
    Abstract: The power converter for solving the above-described problem has a module section and a drive section for operating the module section. The drive section has a drive circuit. The drive circuit is provided so as to correspond to the first semiconductor element which is one of the semiconductor elements comprising the parallel circuit; wherein drive signals for operating the first semiconductor element are output. The drive signals that are output from the drive circuit are electrically branched and output to a second semiconductor element which is a separate semiconductor element from the first semiconductor element of the semiconductor elements comprising the parallel circuit. As a result, the second semiconductor element receives the branched drive signals and operates in the same manner as the first semiconductor element. Thereby, a motor converter favorable for control large current at a low cost is provided.
    Type: Application
    Filed: October 21, 2005
    Publication date: April 27, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Koji Yamaguchi, Yuuji Maeda, Tokihito Suwa, Satoru Sigeta