Patents by Inventor Jiro Matsukawa

Jiro Matsukawa 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
    Patent number: 11239786
    Abstract: Provided is a motor control device that includes a controller outputting a PWM control signal for controlling a multiphase electric motor, a driving signal generator generating a switching element driving signal for driving the multiphase electric motor according to the PWM control signal output from the controller, and a bridge circuit configured of a plurality of semiconductor switching elements switching a current flowing through the multiphase electric motor according to the switching element driving signal generated by the driving signal generator. The controller is provided on a first board. The driving signal generator and the bridge circuit are provided on a second board and are connected by wiring provided on the second board. The first board and the second board are connected by a predetermined inter-board connecting line. The controller outputs the PWM control signal to the driving signal generator through the predetermined inter-board connecting line.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: February 1, 2022
    Assignee: NIDEC MOBILITY CORPORATION
    Inventors: Hiromi Murata, Jiro Matsukawa, Tomoya Yamanaka, Masamitsu Hamasaki, Naoyuki Ito, Keita Gunji
  • MOTOR CONTROL DEVICE
    Publication number: 20200235692
    Abstract: Provided is a motor control device that includes a controller outputting a PWM control signal for controlling a multiphase electric motor, a driving signal generator generating a switching element driving signal for driving the multiphase electric motor according to the PWM control signal output from the controller, and a bridge circuit configured of a plurality of semiconductor switching elements switching a current flowing through the multiphase electric motor according to the switching element driving signal generated by the driving signal generator. The controller is provided on a first board. The driving signal generator and the bridge circuit are provided on a second board and are connected by wiring provided on the second board. The first board and the second board are connected by a predetermined inter-board connecting line. The controller outputs the PWM control signal to the driving signal generator through the predetermined inter-board connecting line.
    Type: Application
    Filed: January 17, 2020
    Publication date: July 23, 2020
    Applicant: NIDEC MOBILITY CORPORATION
    Inventors: Hiromi Murata, Jiro Matsukawa, Tomoya Yamanaka, Masamitsu Hamasaki, Naoyuki Ito, Keita Gunji