Patents by Inventor Yukari Takagi

Yukari Takagi 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 apparatus, power generation system, controller, and method for converting power
    Patent number: 10256740
    Abstract: A power conversion apparatus includes a power converter, a voltage detector, a determiner, and a drive controller. The power converter is configured to convert DC power input from an electric generation apparatus into AC power. The voltage detector is configured to detect a DC voltage input into the power converter. The determiner is configured to determine an output power command or an output current command based on whether the output power command or the output current command has a first level that is correlated in advance with a second level of the DC voltage detected by the voltage detector. The drive controller is configured to control the power converter based on the output power command or the output current command determined by the determiner.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: April 9, 2019
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Hirotaka Toujinbara, Yukari Takagi, Masaya Yoshitomi
  • POWER CONVERSION APPARATUS, POWER GENERATION SYSTEM, CONTROLLER, AND METHOD FOR CONVERTING POWER
    Publication number: 20170126142
    Abstract: A power conversion apparatus includes a power converter, a voltage detector, a determiner, and a drive controller. The power converter is configured to convert DC power input from an electric generation apparatus into AC power. The voltage detector is configured to detect a DC voltage input into the power converter. The determiner is configured to determine an output power command or an output current command based on whether the output power command or the output current command has a first level that is correlated in advance with a second level of the DC voltage detected by the voltage detector.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 4, 2017
    Applicant: Kabushiki Kaisha Yaskawa Denki
    Inventors: Hirotaka TOUJINBARA, Yukari Takagi, Masaya Yoshitomi