Patents by Inventor GOH YAMADA

GOH YAMADA 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).

  • Power conversion apparatus including a transformer, an invertor circuit and a plurality of switching devices controlled by a controller
    Patent number: 9667159
    Abstract: A control unit controls the amplitude of at least either an output voltage or an output current by shifting at least either a first on time or a second on time.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: May 30, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Keiji Akamatsu, Takaaki Norisada, Sohei Okamoto, Daisuke Fukuda, Goh Yamada
  • Power conversion apparatus having a switching circuit unit that includes a switching device and an auxiliary switching device
    Patent number: 9543823
    Abstract: A power conversion apparatus includes an inductor inserted between a secondary winding and a switching device, and an auxiliary switching device inserted between the secondary winding and the switching device in parallel to the inductor. The auxiliary switching device is in an off state in a power supply mode in which an output voltage and an output current of a connector have the same polarity. The auxiliary switching device is in an on state in a power regeneration mode in which the output voltage and the output current of the connector have different polarities.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: January 10, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Goh Yamada, Sohei Okamoto, Keiji Akamatsu, Daisuke Fukuda, Takaaki Norisada
  • Power conversion apparatus
    Patent number: 9487098
    Abstract: A power conversion apparatus according to one aspect of the present disclosure comprises a bridge circuit including a first switch and a second switch, a first auxiliary switch, a first auxiliary inductor, a control device, a transformer, a secondary-side inductor, a rectifier circuit, a smoothing circuit, and an output detection circuit. The control device performs an on/off operation on the first auxiliary switch if a value detected by the output detection circuit is smaller than or equal to a setting value, and maintains the first auxiliary switch in an off state if the detected value exceeds the setting value.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: November 8, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Goh Yamada, Takaaki Norisada, Hajime Hida, Sohei Okamoto, Keiji Akamatsu
  • Switching power supply including a rectifier circuit having switching elements, and electric power converter
    Patent number: 9431917
    Abstract: An electric power converter includes a bridge circuit, a transformer, a rectifier circuit, and a smoothing circuit. The rectifier circuit includes a first secondary-side diode disposed in a first current path extending between one end of a secondary winding and a first terminal of the smoothing circuit, a second secondary-side diode disposed in a second current path extending between the other end of the secondary winding and the first terminal of the smoothing circuit, a third secondary-side diode, a fourth secondary-side diode, a first secondary-side switching element, and a second secondary-side switching element. The first secondary-side switching element and the second secondary-side switching element are connected in common to a first node at which the first current path and the second current path are connected to each other.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: August 30, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Sohei Okamoto, Goh Yamada, Daisuke Fukuda, Takaaki Norisada, Keiji Akamatsu
  • POWER CONVERSION APPARATUS
    Publication number: 20160141972
    Abstract: A power conversion apparatus includes an inductor inserted between a secondary winding and a switching device, and an auxiliary switching device inserted between the secondary winding and the switching device in parallel to the inductor. The auxiliary switching device is in an off state in a power supply mode in which an output voltage and an output current of a connector have the same polarity. The auxiliary switching device is in an on state in a power regeneration mode in which the output voltage and the output current of the connector have different polarities.
    Type: Application
    Filed: October 20, 2015
    Publication date: May 19, 2016
    Inventors: GOH YAMADA, SOHEI OKAMOTO, KEIJI AKAMATSU, DAISUKE FUKUDA, TAKAAKI NORISADA
  • POWER CONVERSION APPARATUS
    Publication number: 20160105119
    Abstract: A control unit controls the amplitude of at least either an output voltage or an output current by shifting at least either a first on time or a second on time.
    Type: Application
    Filed: July 28, 2015
    Publication date: April 14, 2016
    Inventors: KEIJI AKAMATSU, TAKAAKI NORISADA, SOHEI OKAMOTO, DAISUKE FUKUDA, GOH YAMADA
  • POWER CONVERSION APPARATUS
    Publication number: 20150256089
    Abstract: A power conversion apparatus according to one aspect of the present disclosure comprises a bridge circuit including a first switch and a second switch, a first auxiliary switch, a first auxiliary inductor, a control device, a transformer, a secondary-side inductor, a rectifier circuit, a smoothing circuit, and an output detection circuit. The control device performs an on/off operation on the first auxiliary switch if a value detected by the output detection circuit is smaller than or equal to a setting value, and maintains the first auxiliary switch in an off state if the detected value exceeds the setting value.
    Type: Application
    Filed: February 20, 2015
    Publication date: September 10, 2015
    Inventors: GOH YAMADA, TAKAAKI NORISADA, HAJIME HIDA, SOHEI OKAMOTO, KEIJI AKAMATSU
  • SWITCHING POWER SUPPLY AND ELECTRIC POWER CONVERTER
    Publication number: 20150207424
    Abstract: An electric power converter includes a bridge circuit, a transformer, a rectifier circuit, and a smoothing circuit. The rectifier circuit includes a first secondary-side diode disposed in a first current path extending between one end of a secondary winding and a first terminal of the smoothing circuit, a second secondary-side diode disposed in a second current path extending between the other end of the secondary winding and the first terminal of the smoothing circuit, a third secondary-side diode, a fourth secondary-side diode, a first secondary-side switching element, and a second secondary-side switching element. The first secondary-side switching element and the second secondary-side switching element are connected in common to a first node at which the first current path and the second current path are connected to each other.
    Type: Application
    Filed: January 8, 2015
    Publication date: July 23, 2015
    Inventors: SOHEI OKAMOTO, GOH YAMADA, DAISUKE FUKUDA, TAKAAKI NORISADA, KEIJI AKAMATSU