Patents by Inventor Yukio Todoroki

Yukio Todoroki 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).

  • Device for driving an induction motor
    Patent number: 4651078
    Abstract: The present invention relates to a device for driving an induction motor comprising:a variable converter which converts an alternating current into a direct current;an inverter device which converts a D-C output of said variable converter into an alternating current;an induction motor driven by said inverter device;a speed detector which detects the speed of said induction motor; anda speed controller which amplifies a reference speed signal input to the inverter device and which provides as an output signal therefrom the difference between the reference speed signal and the speed of the induction motor;wherein the output of said speed controller is changed depending upon the running speed of the induction motor.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: March 17, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yukio Todoroki, Makoto Seto, Kimihiro Yanagihara, Sadanari Yano