Patents by Inventor Hidenori Hara

Hidenori Hara 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: 10947066
    Abstract: A conveying system includes a plurality of carriers and circuitry. The plurality of carriers has a power source generating thrust in accordance with supply of power and moves along a conveying path. The circuitry is configured to execute detection of a collision between the carriers based on an increase in the thrust in the carriers.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: March 16, 2021
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Minoru Koga, Hiromitsu Akae, Yuki Honda, Mina Orii, Go Yamaguchi, Sohei Oga, Hidenori Hara
  • Publication number: 20200144930
    Abstract: A power conversion apparatus connectable in parallel to a second power conversion apparatus includes circuitry that generates a carrier wave, generates a pulse signal synchronized with the carrier wave, generates power that is based on a width of the pulse signal, obtains a monitor value corresponding to a circulating current circulating between the power conversion apparatus and the second power conversion apparatus, and based on the monitor value obtained while the power conversion circuitry is generating driving power, changes a period of the carrier wave to decrease the circulating current.
    Type: Application
    Filed: November 1, 2019
    Publication date: May 7, 2020
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Kentaro Inomata, Akira Yamazaki, Masato Higuchi, Hidenori Hara
  • Publication number: 20190315580
    Abstract: A conveying system includes a plurality of carriers and circuitry. The plurality of carriers has a power source generating thrust in accordance with supply of power and moves along a conveying path. The circuitry is configured to execute detection of a collision between the carriers based on an increase in the thrust in the carriers.
    Type: Application
    Filed: June 28, 2019
    Publication date: October 17, 2019
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Minoru KOGA, Hiromitsu Akae, Yuki Honda, Mina Orii, Go Yamaguchi, Sohei Oga, Hidenori Hara
  • Patent number: 10336559
    Abstract: A conveying system includes at least one guide unit and a carrier. The guide unit includes a traveling surface, at least one guide rail, and a magnetic member formed of a soft magnetic material and including a plurality of salient poles aligned along a conveying path. The carrier includes at least one roller coming in contact with the guide rail from a side direction, at least one wheel coming in contact with the traveling surface, and a plurality of coils provided to overlap with the magnetic member in plan view, and configured to generate thrust along the conveying path and attraction toward the magnetic member by generating a moving magnetic field acting on the magnetic member in accordance with supply of power.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: July 2, 2019
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Minoru Koga, Hiromitsu Akae, Yuki Honda, Mina Orii, Go Yamaguchi, Sohei Oga, Hidenori Hara
  • Publication number: 20180079605
    Abstract: A conveying system includes at least one guide unit and a carrier. The guide unit includes a traveling surface, at least one guide rail, and a magnetic member formed of a soft magnetic material and including a plurality of salient poles aligned along a conveying path. The carrier includes at least one roller coming in contact with the guide rail from a side direction, at least one wheel coming in contact with the traveling surface, and a plurality of coils provided to overlap with the magnetic member in plan view, and configured to generate thrust along the conveying path and attraction toward the magnetic member by generating a moving magnetic field acting on the magnetic member in accordance with supply of power.
    Type: Application
    Filed: November 28, 2017
    Publication date: March 22, 2018
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Minoru KOGA, Hiromitsu AKAE, Yuki HONDA, Mina ORII, Go YAMAGUCHI, Sohei OGA, Hidenori HARA
  • Patent number: 9515575
    Abstract: A controller of a power conversion apparatus according to an embodiment causes a chopper and an inverter to generate an alternating-current (AC) voltage including first and second parts of an AC voltage waveform and causes the inverter to output the AC voltage. The chopper generates the first part having an absolute value higher than a voltage of a DC power supply, and the inverter generates the second part having an absolute value lower than the voltage of the DC power supply. The controller is configured to alternately turn on the first and second switching elements in a period during which the controller controls the chopper to generate the first part of the AC voltage waveform.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: December 6, 2016
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tetsumi Narita, Masato Higuchi, Yasuhiko Kawanami, Hidenori Hara, Takamitsu Katsuki
  • Patent number: 9252698
    Abstract: An inverter device includes a power supply unit and a switch controller. The power supply unit supplies AC power to an AC motor whose electric characteristics in response to a rotation speed are switchable between low speed characteristics and high speed characteristics. The switch controller switches the electric characteristics of the AC motor. The switch controller executes switching control that alternately switches the electric characteristics of the AC motor between the low speed characteristics and the high speed characteristics on the basis of the rotation speed of the AC motor.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: February 2, 2016
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tsuneo Kume, Hidenori Hara, Koji Higashikawa
  • Patent number: 9231446
    Abstract: A motor drive device includes a motor including a high-speed drive winding and a low-speed drive winding, a winding switching portion switching the connection states of the high-speed drive winding and the low-speed drive winding of the motor, a power conversion portion connected to the motor, and a plurality of case portions housing at least the motor, the winding switching portion, and the power conversion portion, while the plurality of case portions are coupled to each other.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: January 5, 2016
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Akira Soma, Hidenori Hara, Yushi Takatsuka
  • 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
  • Patent number: 9178445
    Abstract: A power conversion apparatus includes a power converter and a PWM controller. A first switching element is coupled to a positive pole of a DC power source and one terminal of a load. A second switching element is coupled to a negative pole of the DC power source and another terminal of the load. A third switching element is coupled to the positive pole and the other terminal. A fourth switching element is coupled to the negative pole and the one terminal. The PWM controller PWM-controls the power conversion apparatus to repeat an on-period during which the DC power source outputs a voltage to the load and an off-period during which no voltage is output. The PWM controller alternately controls the first and second switching elements based on a signal set at a high or low level any time during a carrier wave period.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: November 3, 2015
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Hidenori Hara, Yushi Takatsuka
  • Publication number: 20150244287
    Abstract: A controller of a power conversion apparatus according to an embodiment causes a chopper and an inverter to generate an alternating-current (AC) voltage including first and second parts of an AC voltage waveform and causes the inverter to output the AC voltage. The chopper generates the first part having an absolute value higher than a voltage of a DC power supply, and the inverter generates the second part having an absolute value lower than the voltage of the DC power supply. The controller is configured to alternately turn on the first and second switching elements in a period during which the controller controls the chopper to generate the first part of the AC voltage waveform.
    Type: Application
    Filed: April 29, 2015
    Publication date: August 27, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tetsumi NARITA, Masato HIGUCHI, Yasuhiko KAWANAMI, Hidenori HARA, Takamitsu KATSUKI
  • Publication number: 20150137779
    Abstract: A matrix converter according to an embodiment includes a plurality of bidirectional switches disposed between an AC power source and an AC load, and a controller that controls the bidirectional switches. The controller corrects an output voltage reference based on an oscillation component of an input current and/or an input voltage from the AC power source.
    Type: Application
    Filed: January 26, 2015
    Publication date: May 21, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Yoshiyasu TAKASE, Hidenori HARA, Shinya MORIMOTO
  • Patent number: 9036387
    Abstract: An alternating-current/direct-current converter includes a rectifier, a reactor, a capacitor, and a switching rectifier. The rectifier is configured to rectify alternating-current voltage output from an alternating-current power source, thereby converting the alternating-current voltage into direct-current voltage, and to output the direct-current voltage. The capacitor includes terminals. The switching rectifier is coupled to the AC power source and switchable to output the direct-current voltage to the capacitor.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: May 19, 2015
    Assignee: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Katsutoshi Yamanaka, Hidenori Hara, Yushi Takatsuka
  • Publication number: 20150097505
    Abstract: A current source inverter device according to an embodiment includes an inverter that supplies AC power to a number n (integer of 1 or greater) of AC motors each having a number m (integer of 2 or greater) of windings per phase; and a controller that controls the inverter and AC motor. The inverter includes a switching unit, in which a number n×m+1 of switching elements per phase are connected in series, and a number n×m of nodes among the switching elements are respectively connected with a number n×m of different windings with the same phase among the windings of the number n of the AC motors. The controller includes a mode selector that selects at least one winding as a supply target of the AC power from the number n×m of the windings based on a rotation speed of the AC motor.
    Type: Application
    Filed: October 9, 2014
    Publication date: April 9, 2015
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tsuneo KUME, Hidenori HARA, Katsutoshi YAMANAKA
  • 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: 8902612
    Abstract: A power conversion apparatus includes a switching circuit including semiconductor switches, and a main circuit capacitor connected between a DC power source and the switching circuit. The main circuit capacitor includes a capacitor element, first wiring members that connect the DC power source to the switching circuit, and second wiring members that connect the capacitor element to the switching circuit. The capacitor element, the first wiring members, and the second wiring members are received in a case.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: December 2, 2014
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventors: Aiko Inuduka, Toshio Nagao, Hidenori Hara
  • Publication number: 20140217946
    Abstract: An inverter device includes a power supply unit and a switch controller. The power supply unit supplies AC power to an AC motor whose electric characteristics in response to a rotation speed are switchable between low speed characteristics and high speed characteristics. The switch controller switches the electric characteristics of the AC motor. The switch controller executes switching control that alternately switches the electric characteristics of the AC motor between the low speed characteristics and the high speed characteristics on the basis of the rotation speed of the AC motor.
    Type: Application
    Filed: January 24, 2014
    Publication date: August 7, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Tsuneo KUME, Hidenori HARA, Koji HIGASHIKAWA
  • Publication number: 20140202781
    Abstract: A motor drive device includes a motor including a high-speed drive winding and a low-speed drive winding, a winding switching portion switching the connection states of the high-speed drive winding and the low-speed drive winding of the motor, a power conversion portion connected to the motor, and a plurality of case portions housing at least the motor, the winding switching portion, and the power conversion portion, while the plurality of case portions are coupled to each other.
    Type: Application
    Filed: March 25, 2014
    Publication date: July 24, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Akira SOMA, Hidenori HARA, Yushi TAKATSUKA
  • Publication number: 20140176100
    Abstract: A matrix converter according to one aspect of an embodiment includes a plurality of bidirectional switches and a controller. The bidirectional switches connect each phase of an alternating current (AC) power supply with each phase of the rotary electric machine. The controller performs power conversion control between the AC power supply and the rotary electric machine by controlling a plurality of unidirectional switching elements constituting the bidirectional switches individually. The controller performs switching control for advancing the timing at which the unidirectional switching elements constituting the bidirectional switches are switched ON from that in 120-degree conduction control, and for extending a period for which the unidirectional switching elements are kept ON from that in the 120-degree conduction control.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 26, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Hidenori HARA, Kentaro INOMATA, Katsutoshi YAMANAKA, Shinya MORIMOTO, Kotaro TAKEDA
  • Publication number: 20140160824
    Abstract: A matrix converter according to an embodiment includes a plurality of bidirectional switches and a controller. The bidirectional switches connect each of phases of an alternating current (AC) power supply with each of phases of a rotary electric machine. The controller controls the bidirectional switches to perform power conversion control between the AC power supply and the rotary electric machine. The controller performs on/off control individually on a plurality of unidirectional switching elements constituting the bidirectional switches by using both 120-degree conduction control and PWM control.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 12, 2014
    Applicant: KABUSHIKI KAISHA YASKAWA DENKI
    Inventors: Kentaro INOMATA, Katsutoshi YAMANAKA, Hidenori HARA, Shinya MORIMOTO, Kotaro TAKEDA, Takashi TANAKA, Takuya NAKA, Wataru YOSHINAGA