Patents by Inventor Kyooji Yamane

Kyooji Yamane 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).

  • System for controlling brushless DC motor
    Patent number: 4700116
    Abstract: A brushless DC motor control system comprises a commercially available semiconductor commutator supplying field current to stator windings of the DC motor, a current detector connected to a negative-side terminal of the semiconductor commutator, a signal conversion circuit converting the output signal of the current detector to a signal correlated to the load of the motor, and a microcomputer controlling the semiconductor commutator according to the output signal of the signal conversion circuit in the motor starting mode.
    Type: Grant
    Filed: February 19, 1986
    Date of Patent: October 13, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Tooru Inoue, Kiyoshi Nagasawa, Kyooji Yamane