Patents by Inventor Atsushi IWASHIMA

Atsushi IWASHIMA 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: 10766630
    Abstract: A first DC power supply section of a DC stabilization power supply system includes at least a generator and a PWM converter. A second DC power supply section of the DC stabilization power supply system includes at least a battery and a boost converter. Each of these DC power supply sections performs a power supply stabilization operation for supplying DC power to an electric system and absorbing regenerative power generated from an actuator or the like. A PWM converter controls adjustment of the amount of the power supply stabilization operation to be performed by the DC power supply section and the amount of the power stabilization operation to be performed by the DC power supply section, by changing a target voltage value of a DC bus.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: September 8, 2020
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Atsushi Iwashima, Kazushige Sugimoto, Jun Yamaguchi, Suguru Takayama
  • Patent number: 10279759
    Abstract: An electric system of an aircraft includes a power stabilizing device connected to a primary AC bus and a secondary battery. The secondary battery has a rated voltage which allows the secondary battery to absorb regenerative power from a control surface actuator. Based on a voltage and a frequency in the primary AC bus, charging/discharging of the secondary battery is controlled to stabilize the electric system.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: May 7, 2019
    Assignees: KAWASAKI JUKOGYO KABUSHIKI KAISHA, THE BOEING COMPANY
    Inventors: Atsushi Iwashima, Kazushige Sugimoto, Kazuya Matsuo, Joseph S. Breit, Farhad Nozari
  • Publication number: 20180362181
    Abstract: A first DC power supply section of a DC stabilization power supply system includes at least a generator and a PWM converter. A second DC power supply section of the DC stabilization power supply system includes at least a battery and a boost converter. Each of these DC power supply sections performs a power supply stabilization operation for supplying DC power to an electric system and absorbing regenerative power generated from an actuator or the like. A PWM converter controls adjustment of the amount of the power supply stabilization operation to be performed by the DC power supply section and the amount of the power stabilization operation to be performed by the DC power supply section, by changing a target voltage value of a DC bus.
    Type: Application
    Filed: June 15, 2016
    Publication date: December 20, 2018
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Atsushi IWASHIMA, Kazushige SUGIMOTO, Jun YAMAGUCHI, Suguru TAKAYAMA
  • Patent number: 10029631
    Abstract: A power stabilizing device in a system includes as a portion of a power converter section, a second PWM converter provided between a second primary AC bus and a second DC bus in an electric system and configured to perform mutual conversion between DC power and AC power. A power stabilizing control section in the power stabilizing device controls charging and discharging of a secondary battery based on a voltage and a frequency in the second primary AC bus, thereby stabilizing the electric system.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: July 24, 2018
    Assignees: KAWASAKI JUKOGYO KABUSHIKI KAISHA, THE BOEING COMPANY
    Inventors: Atsushi Iwashima, Kazushige Sugimoto, Kazuya Matsuo, Joseph S. Breit, Farhad Nozari
  • Publication number: 20150183385
    Abstract: A power stabilizing device in a system includes as a portion of a power converter section, a second PWM converter provided between a second primary AC bus and a second DC bus in an electric system and configured to perform mutual conversion between DC power and AC power. A power stabilizing control section in the power stabilizing device controls charging and discharging of a secondary battery based on a voltage and a frequency in the second primary AC bus, thereby stabilizing the electric system.
    Type: Application
    Filed: July 29, 2013
    Publication date: July 2, 2015
    Inventors: Atsushi Iwashima, Kazushige Sugimoto, Kazuya Matsuo, Joseph S. Breit, Farhad Nozari
  • Publication number: 20150165990
    Abstract: An electric system of an aircraft includes a power stabilizing device connected to a primary AC bus and a secondary battery. The secondary battery has a rated voltage which allows the secondary battery to absorb regenerative power from a control surface actuator. Based on a voltage and a frequency in the primary AC bus, charging/discharging of the secondary battery is controlled to stabilize the electric system.
    Type: Application
    Filed: July 29, 2013
    Publication date: June 18, 2015
    Inventors: Atsushi Iwashima, Kazushige Sugimoto, Kazuya Matsuo, Joseph S. Breit, Farhad Nozari
  • Publication number: 20140197681
    Abstract: A power stabilizing device in a system includes as a portion of a power converter section, a second PWM converter provided between a second primary AC bus and a second DC bus in an electric system and configured to perform mutual conversion between DC power and AC power. A power stabilizing control section in the power stabilizing device controls charging and discharging of a secondary battery based on a voltage and a frequency in the second primary AC bus, thereby stabilizing the electric system.
    Type: Application
    Filed: July 30, 2012
    Publication date: July 17, 2014
    Applicants: THE BOEING COMPANY, KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Atsushi IWASHIMA, Kazushige SUGIMOTO, Kazuya MATSUO, Joseph S. BREIT, Farhad NOZARI
  • Publication number: 20140032002
    Abstract: An electric system of an aircraft includes a power stabilizing device connected to a primary AC bus and a secondary battery. The secondary battery has a rated voltage which allows the secondary battery to absorb regenerative power from a control surface actuator. Based on a voltage and a frequency in the primary AC bus, charging/discharging of the secondary battery is controlled to stabilize the electric system.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 30, 2014
    Applicants: THE BOEING COMPANY, KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Atsushi IWASHIMA, Kazushige SUGIMOTO, Kazuya MATSUO, Joseph S. BREIT, Farhad NOZARI