Patents by Inventor Masayuki Kanari

Masayuki Kanari 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).

  • Deceleration apparatus for motor and drive circuit for use in motor deceleration apparatus or control apparatus for use in sewing machine
    Patent number: 5151637
    Abstract: A deceleration apparatus of an AC servo motor for use in an industrial sewing machine performs a regenerating braking operation during a motor deceleration period. At an early time in the regenerating braking operation of the motor, an intermittent regenerating braking operation is carried out by supplying a current in a control circuit of a motor drive circuit. Subsequently, a continuous regenerating braking operation in the motor is carried out. A drive element comprising a switching element or a transistor in the control circuit is protected in accordance with an intermittent regenerating braking operation or a small regenerating braking current.
    Type: Grant
    Filed: April 5, 1990
    Date of Patent: September 29, 1992
    Assignees: Hitachi, Ltd., Hitachi Taga Engineering Co., Ltd.
    Inventors: Kazuaki Takada, Masayuki Kanari, Makoto Yajima, Eiji Toyoda