Patents by Inventor Hiroshi KAMIDUMA

Hiroshi KAMIDUMA 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 conversion unit, power converter, and power conversion method
    Patent number: 10014793
    Abstract: An imbalance of control signals between two power semiconductor elements is reduced. A first power semiconductor module and a second power semiconductor module are arranged in a predetermined direction along a surface of a control signal wiring circuit board, each of longitudinal directions of the first power semiconductor module and the second power semiconductor module along the surface of the control signal wiring circuit board is a predetermined direction, and, in a first control signal wiring, a distance between an external control signal terminal and a second control signal terminal is equal to a distance between the external control signal terminal and a first control signal terminal.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: July 3, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Akira Mima, Yukio Hattori, Tetsuya Kawashima, Yuichi Mabuchi, Daisuke Matsumoto, Hiroshi Kamiduma
  • Power Conversion Unit, Power Converter, and Power Conversion Method
    Publication number: 20160373017
    Abstract: An imbalance of control signals between two power semiconductor elements is reduced. A first power semiconductor module and a second power semiconductor module are arranged in a predetermined direction along a surface of a control signal wiring circuit board, each of longitudinal directions of the first power semiconductor module and the second power semiconductor module along the surface of the control signal wiring circuit board is a predetermined direction, and, in a first control signal wiring, a distance between an external control signal terminal and a second control signal terminal is equal to a distance between the external control signal terminal and a first control signal terminal.
    Type: Application
    Filed: March 10, 2014
    Publication date: December 22, 2016
    Inventors: Akira MIMA, Yukio HATTORI, Tetsuya KAWASHIMA, Yuichi MABUCHI, Daisuke MATSUMOTO, Hiroshi KAMIDUMA