Patents by Inventor Hayato KAMIZAWA

Hayato KAMIZAWA 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).

  • Rotation angle detection device and ac rotating machine control device
    Patent number: 11018617
    Abstract: Provided is a rotation angle detection device, including: a rotation angle sensor; an input circuit configured to output a rotation angle signal and an abnormality signal; a calculation processing unit con tired to calculate a rotation angle calculation value and a rotation speed calculation value based on a rotation angle detection value at a predetermined preset calculation timing; and a rotation angle estimation processing unit configured to calculate a rotation angle estimation value after the calculation timing based on the rotation angle calculation value and the rotation speed calculation value. When the abnormality signal is received, the calculation processing unit calculates the rotation angle calculation value and the rotation speed calculation value based on the rotation angle estimation value, in place of the rotation angle detection value.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: May 25, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hayato Kamizawa, Kiyohiro Morita, Michitaka Fujiwara
  • ROTATION ANGLE DETECTION DEVICE AND AC ROTATING MACHINE CONTROL DEVICE
    Publication number: 20200382044
    Abstract: Provided is a rotation angle detection device, including: a rotation angle sensor; an input circuit configured to output a rotation angle signal and an abnormality signal; a calculation processing unit con tired to calculate a rotation angle calculation value and a rotation speed calculation value based on a rotation angle detection value at a predetermined preset calculation timing; and a rotation angle estimation processing unit configured to calculate a rotation angle estimation value after the calculation timing based on the rotation angle calculation value and the rotation speed calculation value. When the abnormality signal is received, the calculation processing unit calculates the rotation angle calculation value and the rotation speed calculation value based on the rotation angle estimation value, in place of the rotation angle detection value.
    Type: Application
    Filed: May 24, 2017
    Publication date: December 3, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hayato KAMIZAWA, Kiyohiro MORITA, Michitaka FUJIWARA