Patents by Inventor Taito KIKUCHI

Taito KIKUCHI 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).

  • Inverter device for performing a power conversion operation to convert DC power to AC power
    Patent number: 11374505
    Abstract: An inverter performs a power conversion operation for converting DC power into AC power, includes an arithmetic control device provided with a voltage command signal generation unit, a synthesis processing unit, and a carrier wave comparison unit. The voltage command signal generation unit has a plurality of control systems, and outputs the first voltage command signal generated based on the first control system among the plurality of control systems, and the second voltage command signal generated based on the second control system different from the first control system among the plurality of control systems. The synthesis processing unit generates a synthesized voltage command signal obtained by synthesizing the first voltage command signal and the second voltage command signal at a predetermined ratio. The carrier wave comparison unit generates a PWM signal which is a gate drive signal for controlling the power conversion operation based on the synthesized voltage command signal.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: June 28, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Takuya Nemoto, Toshiyuki Ajima, Taito Kikuchi
  • Inverter device for performing a power conversion operation to convert DC power to AC power
    Patent number: 11342863
    Abstract: An inverter performs a power conversion operation for converting DC power into AC power, includes an arithmetic control device provided with a voltage command signal generation unit, a synthesis processing unit, and a carrier wave comparison unit. The voltage command signal generation unit has a plurality of control systems, and outputs the first voltage command signal generated based on the first control system among the plurality of control systems, and the second voltage command signal generated based on the second control system different from the first control system among the plurality of control systems. The synthesis processing unit generates a synthesized voltage command signal obtained by synthesizing the first voltage command signal and the second voltage command signal at a predetermined ratio. The carrier wave comparison unit generates a PWM signal which is a gate drive signal for controlling the power conversion operation based on the synthesized voltage command signal.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: May 24, 2022
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Takuya Nemoto, Toshiyuki Ajima, Taito Kikuchi
  • INVERTER DEVICE
    Publication number: 20210242799
    Abstract: To suppress torque fluctuations that occur when switching control systems. The inverter, which performs a power conversion operation for converting DC power into AC power, includes an arithmetic control device INV200 which is provided with a voltage command signal generation unit 620, a synthesis processing unit 670, and a carrier wave comparison unit 680. The voltage command signal generation unit 620 has a plurality of control systems, and outputs the first voltage command signal generated based on the first control system among the plurality of control systems, and the second voltage command signal generated based on the second control system different from the first control system among the plurality of control systems. The synthesis processing unit 670 generates a synthesized voltage command signal obtained by synthesizing the first voltage command signal and the second voltage command signal at a predetermined ratio.
    Type: Application
    Filed: July 25, 2019
    Publication date: August 5, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takuya NEMOTO, Toshiyuki AJIMA, Taito KIKUCHI