Patents by Inventor Takahiro Uchino

Takahiro Uchino 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: 10367425
    Abstract: A matrix converter includes a plurality of first bidirectional switches electrically connected to each of input phases of an AC power supply and each of output phases of a load, respectively, and a plurality of second bidirectional switches electrically connected to each of the input phases and each of the output phases, respectively. The first bidirectional switch and the second bidirectional switch are electrically connected in parallel to one of the input phases and one of the output phases.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: July 30, 2019
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takayuki Morihara, Takahiro Uchino, Masahiro Tsuruta, Shigekatsu Nagatomo, Yuto Kubo
  • Patent number: 9985551
    Abstract: A capacitor module applicable in a matrix convertor includes a module cover and a plurality of terminals. The module cover houses a plurality of AC capacitors. The plurality of terminals are disposed at least on a first side and a second side of the module cover in a widthwise direction of the module cover, and protrude from a bottom surface of the module cover.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: May 29, 2018
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takayuki Morihara, Takahiro Uchino, Masahiro Tsuruta, Shigekatsu Nagatomo, Yuto Kubo
  • Publication number: 20170077828
    Abstract: A matrix converter includes a plurality of first bidirectional switches electrically connected to each of input phases of an AC power supply and each of output phases of a load, respectively, and a plurality of second bidirectional switches electrically connected to each of the input phases and each of the output phases, respectively. The first bidirectional switch and the second bidirectional switch are electrically connected in parallel to one of the input phases and one of the output phases.
    Type: Application
    Filed: November 4, 2016
    Publication date: March 16, 2017
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takayuki MORIHARA, Takahiro UCHINO, Masahiro TSURUTA, Shigekatsu NAGATOMO, Yuto KUBO
  • Publication number: 20150372609
    Abstract: A capacitor module applicable in a matrix convertor includes a module cover and a plurality of terminals. The module cover houses a plurality of AC capacitors. The plurality of terminals are disposed at least on a first side and a second side of the module cover in a widthwise direction of the module cover, and protrude from a bottom surface of the module cover.
    Type: Application
    Filed: June 19, 2015
    Publication date: December 24, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takayuki MORIHARA, Takahiro UCHINO, Masahiro TSURUTA, Shigekatsu NAGATOMO, Yuto KUBO
  • Patent number: 9219424
    Abstract: A matrix converter according to an embodiment includes a voltage command corrector and a drive signal generator. The voltage command corrector corrects the magnitude of an output voltage command on the basis of amplitude variations of an input current from an AC power supply to a power converter, the amplitude variations being caused by a ripple component of the input current. The drive signal generator generates drive signals that turn ON/OFF a plurality of bidirectional switches on the basis of the output voltage command corrected by the voltage command corrector.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: December 22, 2015
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Kentaro Inomata, Hidenori Hara, Takahiro Uchino
  • Publication number: 20150003136
    Abstract: A matrix converter according to an embodiment includes a voltage command corrector and a drive signal generator. The voltage command corrector corrects the magnitude of an output voltage command on the basis of amplitude variations of an input current from an AC power supply to a power converter, the amplitude variations being caused by a ripple component of the input current. The drive signal generator generates drive signals that turn ON/OFF a plurality of bidirectional switches on the basis of the output voltage command corrected by the voltage command corrector.
    Type: Application
    Filed: June 12, 2014
    Publication date: January 1, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Kentaro INOMATA, Hidenori HARA, Takahiro UCHINO
  • Patent number: 8860341
    Abstract: A power regeneration device according to an aspect of embodiments includes a voltage detecting unit, a signal processing unit, a phase detecting unit, and a power conversion unit. The signal processing unit generates, by using self-oscillation when the output of an AC detection signal from the voltage detecting unit is stopped due to a power outage, an AC signal whose frequency is the same as that of and whose phase is continued to that of the AC detection signal just before the stop. The phase detecting unit detects the phase of the AC power supply on the basis of the AC signal from the signal processing unit when power is recovered from the power outage.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: October 14, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Takahiro Saeki, Takahiro Uchino
  • Patent number: 8848410
    Abstract: A matrix converter includes input terminals, output terminals, a power conversion circuit, and a snubber circuit. The power conversion circuit includes bidirectional switches of which each includes antiparallel connection circuits connected serially. The snubber circuit is connected to the bidirectional switches. The snubber circuit includes first diodes, a capacitor, a second diode, and third diodes. The first diodes are respectively corresponded to the bidirectional switches. A first connecting point of each the first diode is connected to a connection point between the two unidirectional switching elements constituting the bidirectional switch. A first connecting point of the capacitor is connected to a second connecting point of each the first diode. First and second connecting points of the second diode are connected to a second connecting point of the capacitor and the corresponding output terminal. The bidirectional switches, the first diodes, and the second diode are arranged in one power module.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: September 30, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Takahiro Uchino, Ryo Ohira
  • Patent number: 8837119
    Abstract: A matrix converter includes first to third AC reactors connected in series with first- to third-phase outputs of three-phase AC electric power, and a first cooling fan that generates cool air for cooling the first to third AC reactors. The first to third AC reactors are arranged side-by-side in a direction intersecting a direction in which the cool air flows.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: September 16, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Kazutaka Kishimoto, Makoto Kojyo, Takahiro Uchino
  • Publication number: 20140159698
    Abstract: A matrix converter includes input terminals, output terminals, a power conversion circuit, and a snubber circuit. The power conversion circuit includes bidirectional switches of which each includes antiparallel connection circuits connected serially. The snubber circuit is connected to the bidirectional switches. The snubber circuit includes first diodes, a capacitor, a second diode, and third diodes. The first diodes are respectively corresponded to the bidirectional switches. A first connecting point of each the first diode is connected to a connection point between the two unidirectional switching elements constituting the bidirectional switch. A first connecting point of the capacitor is connected to a second connecting point of each the first diode. First and second connecting points of the second diode are connected to a second connecting point of the capacitor and the corresponding output terminal. The bidirectional switches, the first diodes, and the second diode are arranged in one power module.
    Type: Application
    Filed: October 21, 2013
    Publication date: June 12, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takahiro UCHINO, Ryo OHIRA
  • Patent number: 8576528
    Abstract: A matrix converter includes a plurality of semiconductor switch modules, and a plurality of snubber modules each having a plurality of capacitors and a plurality of diodes. Each of the snubber modules has a terminal group projecting outward, a first terminal, and a second terminal. The first and second terminals project from positions different from the terminal group, and are connected to an external circuit provided outside the matrix converter. Terminals of the terminal group are connected to terminals of a corresponding semiconductor switch module. The first terminals of the plurality of snubber modules are connected to one another via a first bus bar, and the second terminals are connected to one another via a second bus bar.
    Type: Grant
    Filed: July 19, 2011
    Date of Patent: November 5, 2013
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Sumiaki Nagano, Makoto Kojyo, Takahiro Uchino
  • Publication number: 20130214708
    Abstract: A power regeneration device according to an aspect of embodiments includes a voltage detecting unit, a signal processing unit, a phase detecting unit, and a power conversion unit. The signal processing unit generates, by using self-oscillation when the output of an AC detection signal from the voltage detecting unit is stopped due to a power outage, an AC signal whose frequency is the same as that of and whose phase is continued to that of the AC detection signal just before the stop. The phase detecting unit detects the phase of the AC power supply on the basis of the AC signal from the signal processing unit when power is recovered from the power outage.
    Type: Application
    Filed: September 14, 2012
    Publication date: August 22, 2013
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Takahiro SAEKI, Takahiro Uchino
  • Patent number: 8159851
    Abstract: A matrix converter includes a matrix converter main circuit, an input voltage detector group configured to detect an input voltage of an alternating current source, a gate driver configured to drive a bidirectional switch, and a controller having a pulse width modulation operation unit and a commutation operation unit. The pulse width modulation operation unit is configured to fix one output phase in a conduction state, configured to pulse-width-modulate one of remaining two output phases by using all three input phases, and configured to pulse-width-modulate the other output phase by using only two input phases of a reference input voltage and a middle input voltage.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: April 17, 2012
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Hidenori Hara, Eiji Yamamoto, Takahiro Uchino
  • Publication number: 20120019970
    Abstract: A matrix converter includes a plurality of semiconductor switch modules, and a plurality of snubber modules each having a plurality of capacitors and a plurality of diodes. Each of the snubber modules has a terminal group projecting outward, a first terminal, and a second terminal. The first and second terminals project from positions different from the terminal group, and are connected to an external circuit provided outside the matrix converter. Terminals of the terminal group are connected to terminals of a corresponding semiconductor switch module. The first terminals of the plurality of snubber modules are connected to one another via a first bus bar, and the second terminals are connected to one another via a second bus bar.
    Type: Application
    Filed: July 19, 2011
    Publication date: January 26, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Sumiaki NAGANO, Makoto KOJYO, Takahiro UCHINO
  • Publication number: 20120020021
    Abstract: A matrix converter includes first to third AC reactors connected in series with first- to third-phase outputs of three-phase AC electric power, and a first cooling fan that generates cool air for cooling the first to third AC reactors. The first to third AC reactors are arranged side-by-side in a direction intersecting a direction in which the cool air flows.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 26, 2012
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Kazutaka Kishimoto, Makoto Kojyo, Takahiro Uchino
  • Publication number: 20100118570
    Abstract: A matrix converter includes a matrix converter main circuit, an input voltage detector group configured to detect an input voltage of an alternating current source, a gate driver configured to drive a bidirectional switch, and a controller having a pulse width modulation operation unit and a commutation operation unit. The pulse width modulation operation unit is configured to fix one output phase in a conduction state, configured to pulse-width-modulate one of remaining two output phases by using all three input phases, and configured to pulse-width-modulate the other output phase by using only two input phases of a reference input voltage and a middle input voltage.
    Type: Application
    Filed: January 19, 2010
    Publication date: May 13, 2010
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Hidenori HARA, Eiji YAMAMOTO, Takahiro UCHINO
  • Publication number: 20010054863
    Abstract: In the present slide rail a space receives a roller. Upper and lower rollers have their respective axes for rotation having inclinations of &thgr; and −&thgr;°, respectively, relative to an axis perpendicular to a body of the external rail. Thus the slide rail can have a simple structure.
    Type: Application
    Filed: May 15, 2001
    Publication date: December 27, 2001
    Inventors: Takahiro Uchino, Atsuo Otsuji