Patents by Inventor Hiroaki Nakaba

Hiroaki Nakaba 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 and device for controlling step motor
    Patent number: 5723964
    Abstract: A CPU measures pulse width of a vehicle speed pulse signal transmitted from a vehicle speed sensor continuously and estimates the pulse width coming next according to the pulse width of the present pulse and preceding pulses. The CPU calculates a set position of a stepping motor from the data of the pulse width and the estimated pulse width, and calculates the number of steps for the stepping motor to move to the set position from the set position data and the present position data. Each driving time of the stepping motor is calculated from the estimated pulse width data and the number of steps.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: March 3, 1998
    Assignee: Nippondenso Co., Ltd.
    Inventor: Hiroaki Nakaba