Patents by Inventor Teruya Hamai

Teruya Hamai 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).

  • DC to AC power conversion device using switching elements
    Patent number: 9413224
    Abstract: A power conversion device includes a main circuit unit, a first current detector, a second current detector, a voltage detector, and a controller. The main circuit unit is connected to a DC voltage source and an AC power system. The main circuit unit includes an inverter including a plurality of switching elements. The main circuit unit converts a DC power to an AC power. The controller decides that whether the output current of the inverter falls within a range between an upper limit value and a lower limit value, stop an operation of the switching elements when the output current of the inverter falls beyond the range, and resume the operation of the switching elements when the output current of the inverter returns into the range.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: August 9, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuusuke Kouno, Yoichi Morishima, Yoshinori Sugimoto, Takao Suginohara, Teruya Hamai, Hiroaki Matsumoto