Patents by Inventor Ryoma MATSUO

Ryoma MATSUO 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).

  • SWITCHING POWER CIRCUIT
    Publication number: 20230155501
    Abstract: According to one embodiment, a switching power circuit compares a reference voltage with a feedback voltage of an output voltage, and controls the output voltage in accordance with the reference voltage, in which in a case where the output current is greater than a predetermined set current, the voltage of the reference voltage is decreased.
    Type: Application
    Filed: January 19, 2023
    Publication date: May 18, 2023
    Inventors: Toshimasa Namekawa, Ryoma Matsuo, Katsumasa Tanaka
  • Switching power circuit
    Patent number: 11594963
    Abstract: According to one embodiment, a switching power circuit compares a reference voltage with a feedback voltage of an output voltage, and controls the output voltage in accordance with the reference voltage, in which in a case where the output current is greater than a predetermined set current, the voltage of the reference voltage is decreased.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: February 28, 2023
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventors: Toshimasa Namekawa, Ryoma Matsuo, Katsumasa Tanaka
  • Switching power circuit
    Patent number: 11290010
    Abstract: According to one embodiment, a switching power circuit, includes: a switching transistor that is connected between an input terminal and a node; a driving circuit that supplies a PWM driving signal to the switching transistor; and a phase compensation circuit that supplies a feedback voltage to an error amplifier, in which the properties of the phase compensation circuit are switched in accordance with the voltage of the node immediately before the switching transistor is turned on.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: March 29, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
    Inventors: Toshimasa Namekawa, Ryoma Matsuo, Katsumasa Tanaka
  • SWITCHING POWER CIRCUIT
    Publication number: 20210083574
    Abstract: According to one embodiment, a switching power circuit, includes: a switching transistor that is connected between an input terminal and a node; a driving circuit that supplies a PWM driving signal to the switching transistor; and a phase compensation circuit that supplies a feedback voltage to an error amplifier, in which the properties of the phase compensation circuit are switched in accordance with the voltage of the node immediately before the switching transistor is turned on.
    Type: Application
    Filed: February 25, 2020
    Publication date: March 18, 2021
    Inventors: Toshimasa Namekawa, Ryoma Matsuo, Katsumasa Tanaka
  • SWITCHING POWER CIRCUIT
    Publication number: 20210067037
    Abstract: According to one embodiment, a switching power circuit compares a reference voltage with a feedback voltage of an output voltage, and controls the output voltage in accordance with the reference voltage, in which in a case where the output current is greater than a predetermined set current, the voltage of the reference voltage is decreased.
    Type: Application
    Filed: March 2, 2020
    Publication date: March 4, 2021
    Inventors: Toshimasa Namekawa, Ryoma Matsuo, Katsumasa Tanaka
  • Rotating electrical machine apparatus
    Patent number: 10840769
    Abstract: In a rotating electrical machine apparatus, a rotor portion provided in a cylindrical portion and a stator portion provided in a recessed portion in which the rotor portion is housed are aligned along the rotation axis of a rim such that a force is generated in a direction opposite to the direction of a load that acts along the rotation axis of the rim of loads that act on the rim following rotation of a blade.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: November 17, 2020
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Takayoshi Suzuki, Ryoma Matsuo, Satoshi Ishikawa, Noriyoshi Hiraoka
  • ROTATING ELECTRICAL MACHINE APPARATUS
    Publication number: 20200031446
    Abstract: In a rotating electrical machine apparatus, a rotor portion provided in a cylindrical portion and a stator portion provided in a recessed portion in which the rotor portion is housed are aligned along the rotation axis of a rim such that a force is generated in a direction opposite to the direction of a load that acts along the rotation axis of the rim of loads that act on the rim following rotation of a blade.
    Type: Application
    Filed: October 3, 2019
    Publication date: January 30, 2020
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Takayoshi SUZUKI, Ryoma MATSUO, Satoshi ISHIKAWA, Noriyoshi HIRAOKA
  • Rotating electrical machine apparatus
    Patent number: 10486784
    Abstract: In a rotating electrical machine apparatus, a rotor portion provided in a cylindrical portion and a stator portion provided in a recessed portion in which the rotor portion is housed are aligned along the rotation axis of a rim such that a force is generated in a direction opposite to the direction of a load that acts along the rotation axis of the rim of loads that act on the rim following rotation of a blade.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: November 26, 2019
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Takayoshi Suzuki, Ryoma Matsuo, Satoshi Ishikawa, Noriyoshi Hiraoka
  • ROTATING ELECTRICAL MACHINE APPARATUS
    Publication number: 20160185431
    Abstract: In a rotating electrical machine apparatus, a rotor portion provided in a cylindrical portion and a stator portion provided in a recessed portion in which the rotor portion is housed are aligned along the rotation axis of a rim such that a force is generated in a direction opposite to the direction of a load that acts along the rotation axis of the rim of loads that act on the rim following rotation of a blade.
    Type: Application
    Filed: December 17, 2015
    Publication date: June 30, 2016
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Takayoshi SUZUKI, Ryoma MATSUO, Satoshi ISHIKAWA, Noriyoshi HIRAOKA