Patents by Inventor Hiroyasu Kanemaru

Hiroyasu Kanemaru 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).

  • Driving circuit for brushless DC motor
    Patent number: 4070606
    Abstract: A driving circuit for a brushless DC motor provided with an element for detecting the angular position of the rotor of the motor, characterized in that by the output of the differential amplifier for amplifying the output of the detecting element, a switching element is rendered on and off during a certain portion of the duration of the output of the detecting element and that the motor is rotated at a constant speed by applying a rotation control voltage to an element for energizing the stator winding of the motor during the non-conductive period.
    Type: Grant
    Filed: August 12, 1976
    Date of Patent: January 24, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Morozumi, Hiroyasu Kanemaru