Patents by Inventor Naoto NORINA

Naoto NORINA 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).

  • Power conversion apparatus, drive control system, machine learning apparatus, and motor monitoring method
    Patent number: 11362614
    Abstract: A power conversion apparatus includes a main circuit unit, a control unit, a current sensor, and a half-wave rectifier unit. The control unit includes current frequency calculation units and monitoring units. The current frequency calculation units calculate current frequencies based on at least either the rising timing or falling timing of current detection signals half-wave rectified by the half-wave rectifier unit. The monitoring units monitor the speed of a motor based on the current frequencies calculated by the current frequency calculation units.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: June 14, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Norikazu Hattori, Norihiro Suzuki, Tetsuo Tanaka, Naoto Norina, Takahiro Harada
  • POWER CONVERSION APPARATUS, DRIVE CONTROL SYSTEM, MACHINE LEARNING APPARATUS, AND MOTOR MONITORING METHOD
    Publication number: 20220045641
    Abstract: A power conversion apparatus includes a main circuit unit, a control unit, a current sensor, and a half-wave rectifier unit. The control unit includes current frequency calculation units and monitoring units. The current frequency calculation units calculate current frequencies based on at least either the rising timing or falling timing of current detection signals half-wave rectified by the half-wave rectifier unit. The monitoring units monitor the speed of a motor based on the current frequencies calculated by the current frequency calculation units.
    Type: Application
    Filed: November 21, 2019
    Publication date: February 10, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Norikazu HATTORI, Norihiro SUZUKI, Tetsuo TANAKA, Naoto NORINA, Takahiro HARADA
  • Motor control device
    Patent number: 9614467
    Abstract: The voltage amplification factor during rapid deceleration control of a motor is set to a value obtained by adding a first voltage amplification factor calculated with reference to the voltage of the DC circuit section of the inverter using a predetermined function and a low-pass filter and a second voltage amplification factor calculated with reference to the inverter current using a PI control. And both calculations are performed in parallel.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: April 4, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenji Takahashi, Shinichi Furutani, Naoto Norina
  • MOTOR CONTROL DEVICE
    Publication number: 20150357945
    Abstract: The voltage amplification factor during rapid deceleration control of a motor is set to a value obtained by adding a first voltage amplification factor calculated with reference to the voltage of the DC circuit section of the inverter using a predetermined function and a low-pass filter and a second voltage amplification factor calculated with reference to the inverter current using a PI control. And both calculations are performed in parallel.
    Type: Application
    Filed: October 30, 2013
    Publication date: December 10, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenji TAKAHASHI, Shinichi FURUTANI, Naoto NORINA