Patents by Inventor Sigeyuki Itou

Sigeyuki Itou 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).

  • Torque detecting apparatus for reducing torque ripple in an AC motor
    Patent number: 5616999
    Abstract: A torque detecting apparatus for an AC motor is provided which includes a current detecting circuit, an angular position detecting circuit, a torque detecting circuit, and a ripple reducing circuit. The current detecting circuit detects a phase current flowing through each winding of the motor. The torque detecting means determines a torque value indicative of the amount of torque of the AC motor based on the phase currents detected by the current detecting circuit according to an angular position detected by the angular position detecting circuit. The ripple reducing circuit reduces ripple contained in the torque value according to the angular position of the motor for determining an accurate amount of torque of the motor.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: April 1, 1997
    Assignee: Nippondenso Co., Ltd.
    Inventors: Masafumi Matsumura, Sigeyuki Itou