Patents by Inventor Ryuta Matsutani

Ryuta Matsutani 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).

  • Torque control device and method for controlling the same
    Patent number: 8089226
    Abstract: A torque control device controlling torque of first and second mechanical units connected coaxially to each other through connecting members includes a controller generating first and second references from a command from a host system, first and second motors respectively driving the first and second mechanical units, first and second motor control units respectively controlling the first and second motors on the basis of the first and second references. The first and second references synchronously accelerate the first and second motors to first rotational speed, then increase rotational speed of the second motor according to a speed profile to produce torsional torque in the connecting members, decelerate the second motor to the first rotational speed after the torsional torque reaches a predetermined value, and synchronously decelerate and stop the first and second motors after a predetermined time period elapses.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: January 3, 2012
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Ryuta Matsutani, Kenji Yoshida, Shigeru Sakurai
  • TORQUE CONTROL DEVICE AND METHOD FOR CONTROLLING THE SAME
    Publication number: 20100039053
    Abstract: A torque control device controlling torque of first and second mechanical units connected coaxially to each other through connecting members includes a controller generating first and second references from a command from a host system, first and second motors respectively driving the first and second mechanical units, first and second motor control units respectively controlling the first and second motors on the basis of the first and second references. The first and second references synchronously accelerate the first and second motors to first rotational speed, then increase rotational speed of the second motor according to a speed profile to produce torsional torque in the connecting members, decelerate the second motor to the first rotational speed after the torsional torque reaches a predetermined value, and synchronously decelerate and stop the first and second motors after a predetermined time period elapses.
    Type: Application
    Filed: October 26, 2009
    Publication date: February 18, 2010
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Ryuta MATSUTANI, Kenji Yoshida, Shigeru Sakurai