Patents by Inventor Koji MUKAIYAMA

Koji MUKAIYAMA 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).

  • Patent number: 11205986
    Abstract: An inverter device includes a motor, a power supply that supplies the motor with electric current, an inverter that, during regenerative operation of the motor, performs switching between a first state in which regenerative current generated in the motor is returned to the motor again and a second state in which the regenerative current is supplied to the power supply, a first detector that detects a first condition electrically acting on the inverter, a second detector that detects a second condition electrically acting on the power supply, and a determiner that performs a first determination to perform switching between the first state and the second state, based on a detection result by the first detector or the second detector.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: December 21, 2021
    Assignees: NIDEC CORPORATION, NIDEC ELESYS CORPORATION
    Inventors: Yuhi Nakada, Ryo Tachibana, Koji Mukaiyama
  • Publication number: 20200313596
    Abstract: An inverter device includes a motor, a power supply that supplies the motor with electric current, an inverter that, during regenerative operation of the motor, performs switching between a first state in which regenerative current generated in the motor is returned to the motor again and a second state in which the regenerative current is supplied to the power supply, a first detector that detects a first condition electrically acting on the inverter, a second detector that detects a second condition electrically acting on the power supply, and a determiner that performs a first determination to perform switching between the first state and the second state, based on a detection result by the first detector or the second detector.
    Type: Application
    Filed: February 20, 2020
    Publication date: October 1, 2020
    Inventors: Yuhi NAKADA, Ryo TACHIBANA, Koji MUKAIYAMA
  • Publication number: 20190334465
    Abstract: A motor drive includes limiting circuitry that controls a motor based on an instruction torque, and calculates a limitation rate that limits the instruction torque. The instruction torque is limited based on the limitation rate calculated by the limiting circuitry. The motor drive also includes a controller that outputs electric power to drive the motor based on the limited instruction torque.
    Type: Application
    Filed: April 24, 2019
    Publication date: October 31, 2019
    Inventors: Yuhi NAKADA, Takashi KOIKEGAMI, Isao SAMBOMMATSU, Koji MUKAIYAMA