Patents by Inventor Mariko KUBOI

Mariko KUBOI 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).

  • Motor control device and air conditioner
    Patent number: 11658596
    Abstract: A motor control device of an embodiment includes a power supply unit that supplies AC power to a motor; a current detection unit that detects a current flowing through a winding of the motor; a speed and electric angle estimation unit that estimates a rotation speed and an electric angle of the motor based on a voltage outputted by the power supply unit and the current; a coordinate conversion unit that obtains an excitation current and a torque current based on the current and the electric angle; a torque current command determination unit that substitutes a predicted torque calculated based on a mechanical motion equation into a torque component current command value calculated based on a torque expression of a vector control coordinate, to generate a torque component current command value for bringing a difference between an inputted speed command and an estimated speed closer to zero; and a model prediction control unit that applies, to a plurality of predicted currents including a current change ratio de
    Type: Grant
    Filed: May 18, 2022
    Date of Patent: May 23, 2023
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA CARRIER CORPORATION
    Inventors: Takeshi Shibayama, Mariko Kuboi, Toshimitsu Aizawa, Naohito Kamiya, Yoshitaka Uchiyama
  • MOTOR CONTROL DEVICE AND AIR CONDITIONER
    Publication number: 20230045429
    Abstract: A motor control device of an embodiment includes a power supply unit that supplies AC power to a motor; a current detection unit that detects a current flowing through a winding of the motor; a speed and electric angle estimation unit that estimates a rotation speed and an electric angle of the motor based on a voltage outputted by the power supply unit and the current; a coordinate conversion unit that obtains an excitation current and a torque current based on the current and the electric angle; a torque current command determination unit that substitutes a predicted torque calculated based on a mechanical motion equation into a torque component current command value calculated based on a torque expression of a vector control coordinate, to generate a torque component current command value for bringing a difference between an inputted speed command and an estimated speed closer to zero; and a model prediction control unit that applies, to a plurality of predicted currents including a current change ratio de
    Type: Application
    Filed: May 18, 2022
    Publication date: February 9, 2023
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA CARRIER CORPORATION
    Inventors: Takeshi SHIBAYAMA, Mariko KUBOI, Toshimitsu AIZAWA, Naohito KAMIYA, Yoshitaka UCHIYAMA