Patents by Inventor Tomohiro Kawati

Tomohiro Kawati 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).

  • Vehicle control device and control method
    Patent number: 9236825
    Abstract: If a running range is selected, a current conduction mode of a motor is set to a low speed mode in which a current is conducted through a first and second windings, when a rotation speed of the motor is less than a threshold value, and is set to a high speed mode in which a current is conducted through only the first winding, when the rotation speed is equal to or greater than the threshold value. If a neutral range is selected, control of the inverter is stopped, and, a regeneration suppression control is executed to switch the current conduction mode to the high speed mode, not only in a higher-side speed range where the rotation speed is equal to or greater than the threshold value, but also in at least a part of a lower-side speed range where the rotation speed is less than the threshold value.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: January 12, 2016
    Assignees: KABUSHIKI KAISHA YASKAWA DENKI, MAZDA MOTOR CORPORATION
    Inventors: Tomohiro Kawati, Akihiro Furukawa
  • VEHICLE CONTROL DEVICE AND CONTROL METHOD
    Publication number: 20140009097
    Abstract: If a running range is selected, a current conduction mode of a motor is set to a low speed mode in which a current is conducted through a first and second windings, when a rotation speed of the motor is less than a threshold value, and is set to a high speed mode in which a current is conducted through only the first winding, when the rotation speed is equal to or greater than the threshold value. If a neutral range is selected, control of the inverter is stopped, and, a regeneration suppression control is executed to switch the current conduction mode to the high speed mode, not only in a higher-side speed range where the rotation speed is equal to or greater than the threshold value, but also in at least a part of a lower-side speed range where the rotation speed is less than the threshold value.
    Type: Application
    Filed: February 3, 2012
    Publication date: January 9, 2014
    Applicants: MAZDA MOTOR CORPORATION, KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tomohiro Kawati, Akihiro Furukawa