Patents by Inventor Takahiko YATO

Takahiko YATO 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).

  • Control apparatus of motor
    Patent number: 9906184
    Abstract: A temperature detection element that detects a temperature of a detector is provided in a detector that detects a rotational position and/or a rotational speed of a rotor of a motor. An estimated value of a change of a wiring temperature is calculated based on a current supplied to the wiring of the motor. An estimated value of a change of the detector temperature is calculated based on the estimated value of the change of the wiring temperature. A difference between the detector temperature detected by the temperature detection element and the estimated value of the change of the detector temperature is set as an environmental temperature. The environmental temperature is added to the estimated value of the change of the wiring temperature, to estimate an absolute value of the wiring temperature. The wiring temperature is monitored based on the estimated absolute value of the wiring temperature.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: February 27, 2018
    Assignee: OKUMA CORPORATION
    Inventor: Takahiko Yato
  • CONTROL APPARATUS OF MOTOR
    Publication number: 20160156301
    Abstract: A temperature detection element that detects a temperature of a detector is provided in a detector that detects a rotational position and/or a rotational speed of a rotor of a motor. An estimated value of a change of a wiring temperature is calculated based on a current supplied to the wiring of the motor. An estimated value of a change of the detector temperature is calculated based on the estimated value of the change of the wiring temperature. A difference between the detector temperature detected by the temperature detection element and the estimated value of the change of the detector temperature is set as an environmental temperature. The environmental temperature is added to the estimated value of the change of the wiring temperature, to estimate an absolute value of the wiring temperature. The wiring temperature is monitored based on the estimated absolute value of the wiring temperature.
    Type: Application
    Filed: December 2, 2015
    Publication date: June 2, 2016
    Inventor: Takahiko YATO