Patents by Inventor Keisuke HAYASAKA

Keisuke HAYASAKA 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).

  • SEMICONDUCTOR DEVICE MANUFACTURING METHOD, CURABLE RESIN COMPOSITION FOR TEMPORARY FIXATION MATERIAL, FILM FOR TEMPORARY FIXATION MATERIAL, AND LAMINATED FILM FOR TEMPORARY FIXATION MATERIAL
    Publication number: 20240093059
    Abstract: Disclosed is a semiconductor device manufacturing method, including a preparation step of preparing a laminated body in which a supporting member, a temporary fixation material layer that generates heat upon absorbing light, and a semiconductor member are laminated in this order, and a separation step of irradiating the temporary fixation material layer in the laminated body with incoherent light and thereby separating the semiconductor member from the supporting member.
    Type: Application
    Filed: October 18, 2023
    Publication date: March 21, 2024
    Applicant: RESONAC CORPORATION
    Inventors: Emi MIYAZAWA, Tsuyoshi HAYASAKA, Takashi KAWAMORI, Shinichiro SUKATA, Yoshihito INABA, Keisuke NISHIDO
  • Control device and failure determination method
    Patent number: 11777429
    Abstract: A failure phase of an AC current sensor is determined without providing a DC current sensor. A control device that controls a motor via an inverter circuit that supplies power converted from direct current to three-phase alternating current to the motor, in which a current sensor that detects alternating current of each phase of three-phase alternating current is provided at an output of the inverter circuit, and the control device calculates estimated DC current values by using a duty value of a PWM signal for controlling switching of the inverter circuit and an AC current value of two phases among three phases detected by the current sensor, and determines a failure of the current sensor on the basis of a change in the estimated DC current values that have been calculated.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: October 3, 2023
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Keisuke Hayasaka, Ryoichi Inada, Satoru Shigeta
  • CONTROL DEVICE AND FAILURE DETERMINATION METHOD
    Publication number: 20220200500
    Abstract: A failure phase of an AC current sensor is determined without providing a DC current sensor. A control device that controls a motor via an inverter circuit that supplies power converted from direct current to three-phase alternating current to the motor, in which a current sensor that detects alternating current of each phase of three-phase alternating current is provided at an output of the inverter circuit, and the control device calculates estimated DC current values by using a duty value of a PWM signal for controlling switching of the inverter circuit and an AC current value of two phases among three phases detected by the current sensor, and determines a failure of the current sensor on the basis of a change in the estimated DC current values that have been calculated.
    Type: Application
    Filed: April 3, 2020
    Publication date: June 23, 2022
    Applicant: Hitachi Astemo, Ltd.
    Inventors: Keisuke HAYASAKA, Ryoichi INADA, Satoru SHIGETA