Patents by Inventor Kenichi TOYOZUMI

Kenichi TOYOZUMI 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).

  • Motor control device and steering control device
    Patent number: 10003286
    Abstract: A steering control device capable of suppressing a reduction in reliability even in the case where the redundancy of the power source is increased is provided. A steering ECU includes two control systems in which different external power sources are connected to two drive circuits. The low potential sides of the drive circuits and the low potential sides of the corresponding external power sources are independently connected to each other via power source ground lines for the two control systems. The low potential sides of the drive circuits are connected to each other via an internal ground. Two current detection circuits are provided between the power source ground lines and the internal ground to detect power source ground current values, respectively. The steering ECU includes microcomputers that detect a ground abnormality on the basis of the results of detection performed by the current detection circuits.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: June 19, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Hiroshi Kawamura, Toshihiro Takahashi, Tomohiro Niwa, Kenichi Toyozumi, Takahito Hashimoto
  • MOTOR CONTROL DEVICE AND STEERING CONTROL DEVICE
    Publication number: 20170272009
    Abstract: A steering control device capable of suppressing a reduction in reliability even in the case where the redundancy of the power source is increased is provided. A steering ECU includes two control systems in which different external power sources are connected to two drive circuits. The low potential sides of the drive circuits and the low potential sides of the corresponding external power sources are independently connected to each other via power source ground lines for the two control systems. The low potential sides of the drive circuits are connected to each other via an internal ground. Two current detection circuits are provided between the power source ground lines and the internal ground to detect power source ground current values, respectively. The steering ECU includes microcomputers that detect a ground abnormality on the basis of the results of detection performed by the current detection circuits.
    Type: Application
    Filed: March 9, 2017
    Publication date: September 21, 2017
    Applicant: JTEKT CORPORATION
    Inventors: Hiroshi KAWAMURA, Toshihiro TAKAHASHI, Tomohiro NIWA, Kenichi TOYOZUMI, Takahito HASHIMOTO