Patents by Inventor Hidekazu Akaike

Hidekazu Akaike 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 converter device and control method therefor
    Patent number: 11831260
    Abstract: Power conversion device has first position/rotation detector 14, second position/rotation detector 15 whose resolution per rotation of motor is higher than the first position/rotation detector 14 but whose detection cycle is slower than the first position/rotation detector 14 and encoder switching operation process unit 18. The encoder switching operation process unit 18 switches signals between the first and second position/rotation detectors 14, 15 and outputs the signal of the first position/rotation detector 14 or of the second position/rotation detector 15, or adjusts a ratio of the signal between the first and second position/rotation detectors 14, 15 and output a signal obtained by adding adjusted signals. With this, in the power conversion device, the encoder having high resolution and slow detection time and the encoder having low resolution and fast detection time are properly used according to rotation speed, and current and the rotation speed are controlled with high accuracy.
    Type: Grant
    Filed: August 3, 2021
    Date of Patent: November 28, 2023
    Assignee: MEIDENSHA CORPORATION
    Inventors: Keiki Kozaki, Nobutaka Kezuka, Hidekazu Akaike, Kenji Kobori
  • POWER CONVERTER DEVICE AND CONTROL METHOD THEREFOR
    Publication number: 20230327591
    Abstract: Power conversion device has first position/rotation detector 14, second position/rotation detector 15 whose resolution per rotation of motor is higher than the first position/rotation detector 14 but whose detection cycle is slower than the first position/rotation detector 14 and encoder switching operation process unit 18. The encoder switching operation process unit 18 switches signals between the first and second position/rotation detectors 14, 15 and outputs the signal of the first position/rotation detector 14 or of the second position/rotation detector 15, or adjusts a ratio of the signal between the first and second position/rotation detectors 14, 15 and output a signal obtained by adding adjusted signals. With this, in the power conversion device, the encoder having high resolution and slow detection time and the encoder having low resolution and fast detection time are properly used according to rotation speed, and current and the rotation speed are controlled with high accuracy.
    Type: Application
    Filed: August 3, 2021
    Publication date: October 12, 2023
    Applicant: MEIDENSHA CORPORATION
    Inventors: Keiki KOZAKI, Nobutaka KEZUKA, Hidekazu AKAIKE, Kenji KOBORI