Patents by Inventor Kozo Ide

Kozo Ide 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).

  • Method for estimating induced electromotive force and speed of induction motor, method for correcting misalignment of shaft thereof, and induction motor controller
    Patent number: 6242885
    Abstract: A three-phase-to-two-phase converter detects two-phase currents of three-phase stator currents, converts the stator currents into a &ggr;-&dgr; coordinate system to derive a &ggr;-axis current and a &dgr;-axis current. The &ggr;-axis current, the &dgr;-axis current, and voltage command values outputted respectively from a &ggr;-axis current controller and a &dgr;-axis current controller are entered to a stator current and induced electromotive force estimator, which determines estimated values of the stator currents and estimated values of an induced electromotive force in the &ggr;-&dgr; coordinate system.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: June 5, 2001
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Kozo Ide, Shinya Morimoto, Ryuichi Oguro