Patents by Inventor Kota MATSUI

Kota MATSUI 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: 11482946
    Abstract: Electric power conversion devices carry out feedback control, so that a difference between a duty ratio and a duty ratio target value may approach zero, while a duty ratio, which becomes the origin of a drive signal of a semiconductor switching element, is limited by a prescribed upper limit. The control part issues a first operation result, which is limited by a first upper limit, with respect to an operation value which is on an operation process for controlling an output electric power, and further a second operation result which is limited by a second upper limit, which is set as a value higher than the first upper limit, with respect to an operation value. In addition, the control part is configured to carry out the proportional plus integral control, by a difference between the second operation result and a target value of the second operation result.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: October 25, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kota Matsui
  • Publication number: 20220123666
    Abstract: Electric power conversion devices carry out feedback control, so that a difference between a duty ratio and a duty ratio target value may approach zero, while a duty ratio, which becomes the origin of a drive signal of a semiconductor switching element, is limited by a prescribed upper limit. The control part issues a first operation result, which is limited by a first upper limit, with respect to an operation value which is on an operation process for controlling an output electric power, and further a second operation result which is limited by a second upper limit, which is set as a value higher than the first upper limit, with respect to an operation value. In addition, the control part is configured to carry out the proportional plus integral control, by a difference between the second operation result and a target value of the second operation result.
    Type: Application
    Filed: August 23, 2021
    Publication date: April 21, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kota Matsui
  • Patent number: 11296608
    Abstract: A control unit of an electric-power conversion apparatus has an input current amplitude command value creation means that creates an input current amplitude command value, which is an amplitude command value of an input current of a first electric-power conversion circuit, in accordance with an output current command value, which is a command value of an output current of a second electric-power conversion circuit, when the output current command value changes; the control unit controls the first electric-power conversion circuit so that an input current follows an input current command value created based on an input current amplitude command value created by the input current amplitude command value creation means; the control unit controls the second electric-power conversion circuit so that an output current follows an output current command value.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: April 5, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kota Matsui
  • Publication number: 20220060117
    Abstract: A control unit of an electric-power conversion apparatus has an input current amplitude command value creation means that creates an input current amplitude command value, which is an amplitude command value of an input current of a first electric-power conversion circuit, in accordance with an output current command value, which is a command value of an output current of a second electric-power conversion circuit, when the output current command value changes; the control unit controls the first electric-power conversion circuit so that an input current follows an input current command value created based on an input current amplitude command value created by the input current amplitude command value creation means; the control unit controls the second electric-power conversion circuit so that an output current follows an output current command value.
    Type: Application
    Filed: December 28, 2020
    Publication date: February 24, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kota MATSUI
  • Patent number: 9660548
    Abstract: A rectification device equipped with: a rectification circuit wherein switch elements are on the two sides adjacent to the side of an AC power source on which a feedback current flows, and the other two sides are rectification elements; an input voltage detector; an input current detector; and a control circuit that modulates the pulse width to control the switch elements in response to the difference between the input current and an input current target value generated on the basis of a synchronized sine wave synchronized with the input voltage. When the polarity of the input voltage, the input current, or the synchronized sine wave differs from the polarity of the other two, the two switch elements are switched simultaneously. Thus, it is possible to prevent circuit damage in the rectification device and to reduce the power factor even when there is a possibility of short-circuiting in the AC power.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: May 23, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kota Matsui
  • Publication number: 20160172996
    Abstract: A rectification device equipped with: a rectification circuit wherein switch elements are on the two sides adjacent to the side of an AC power source on which a feedback current flows, and the other two sides are rectification elements; an input voltage detector; an input current detector; and a control circuit that modulates the pulse width to control the switch elements in response to the difference between the input current and an input current target value generated on the basis of a synchronized sine wave synchronized with the input voltage. When the polarity of the input voltage, the input current, or the synchronized sine wave differs from the polarity of the other two, the two switch elements are switched simultaneously. Thus, it is possible to prevent circuit damage in the rectification device and to reduce the power factor even when there is a possibility of short-circuiting in the AC power.
    Type: Application
    Filed: January 9, 2014
    Publication date: June 16, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Kota MATSUI