Patents by Inventor Takeshi DOWA

Takeshi DOWA 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).

  • Load driving controller
    Patent number: 10156296
    Abstract: A controller according to the present disclosure includes a target current controller, a dither controlling unit, an output-duty generating unit, and a Pulse-Width-Modulation-pulse (PWM-pulse) converting unit. The dither controlling unit generates a dither duty for providing, to a target current duty of a load, a dither having predetermined dither period. The target current controller calculates, for each predetermined feedback period, an average value of a feedback current from the load and generates the target current duty based on the average value. The output-duty generating unit generates an output duty obtained by adding the dither duty generated by the dither controlling unit to the target current duty generated by the target current controller. The PWM-pulse converting unit converts the output duty generated by the output-duty generating unit to PWM pulses.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: December 18, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Tomohito Kato, Takeshi Dowa, Shingo Matsuda, Tomoyuki Kato
  • LOAD DRIVING CONTROLLER
    Publication number: 20180142800
    Abstract: A controller according to the present disclosure includes a target current controller, a dither controlling unit, an output-duty generating unit, and a Pulse-Width-Modulation-pulse (PWM-pulse) converting unit. The dither controlling unit generates a dither duty for providing, to a target current duty of a load, a dither having predetermined dither period. The target current controller calculates, for each predetermined feedback period, an average value of a feedback current from the load and generates the target current duty based on the average value. The output-duty generating unit generates an output duty obtained by adding the dither duty generated by the dither controlling unit to the target current duty generated by the target current controller. The PWM-pulse converting unit converts the output duty generated by the output-duty generating unit to PWM pulses.
    Type: Application
    Filed: October 13, 2017
    Publication date: May 24, 2018
    Applicant: FUJITSU TEN LIMITED
    Inventors: Tomohito KATO, Takeshi DOWA, Shingo MATSUDA, Tomoyuki KATO