Patents by Inventor Tokuo Ohnishi

Tokuo Ohnishi 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 control device, power conversion control method, and power conversion control program
    Patent number: 7855526
    Abstract: In the present invention, when configuring a control system of an inverter performing power conversion between AC and DC, a frequency computation is performed based on biaxial voltage amounts obtained through two current regulators in such a way that each of biaxial component currents obtained by detecting an AC circuit current and performing a rotational coordinate transformation matches each respective command value and phase information in synchronization with an electromotive force power supply of the AC circuit is obtained by integrating the frequency to perform the rotational coordinate transformation of the AC current and also the inverter is caused to operate by generating a PWM switching signal from the biaxial voltage amounts to perform necessary power conversion control.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: December 21, 2010
    Assignee: The University of Tokushima
    Inventors: Tokuo Ohnishi, Kenji Yamanaka, Eiji Gohda
  • POWER CONVERSION CONTROL DEVICE, POWER CONVERSION CONTROL METHOD, AND POWER CONVERSION CONTROL PROGRAM
    Publication number: 20100226157
    Abstract: In the present invention, when configuring a control system of an inverter performing power conversion between AC and DC, a frequency computation is performed based on biaxial voltage amounts obtained through two current regulators in such a way that each of biaxial component currents obtained by detecting an AC circuit current and performing a rotational coordinate transformation matches each respective command value and phase information in synchronization with an electromotive force power supply of the AC circuit is obtained by integrating the frequency to perform the rotational coordinate transformation of the AC current and also the inverter is caused to operate by generating a PWM switching signal from the biaxial voltage amounts to perform necessary power conversion control.
    Type: Application
    Filed: June 27, 2006
    Publication date: September 9, 2010
    Applicant: The University of Tokushima
    Inventors: Tokuo Ohnishi, Kenji Yamanaka, Eiji Gohda