Patents by Inventor Atsushi Tsuchiya

Atsushi Tsuchiya 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: 11558114
    Abstract: Part of compensation of the transmission characteristics of the optical transmitter is performed by transmitter compensation circuitry disposed at a stage prior to the optical transmitter. Remaining part of compensation of the transmission characteristics of the optical transmitter and compensation of the transmission characteristics of the optical receiver is performed by a receiver compensation circuitry disposed at a stage subsequent to the optical receiver. Transmitter compensation characteristics of the transmitter compensation circuitry is set so that a peak-to-average-power ratio of an output signal from the transmitter compensation circuitry becomes equal to or smaller than a predetermined value.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: January 17, 2023
    Assignees: NTT Electronics Corporation, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Akihiro Yamagishi, Atsushi Hoki, Katsuya Tanaka, Eisuke Tsuchiya, Masanori Nakamura, Asuka Matsushita
  • Publication number: 20230005721
    Abstract: A plasma processing apparatus includes a balun having a first unbalanced terminal, a second unbalanced terminal, a first balanced terminal, and a second balanced terminal, a grounded vacuum container, a first electrode electrically connected to the first balanced terminal, a second electrode electrically connected to the second balanced terminal, and a ground electrode arranged in the vacuum container and grounded.
    Type: Application
    Filed: September 15, 2022
    Publication date: January 5, 2023
    Applicant: Canon Anelva Corporation
    Inventors: Atsushi TAKEDA, Takayuki MORIWAKI, Tadashi INOUE, Masaharu TANABE, Kazunari SEKIYA, Hiroshi SASAMOTO, Tatsunori SATO, Nobuaki TSUCHIYA
  • Publication number: 20220380648
    Abstract: A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains is a small-GWP refrigerant.
    Type: Application
    Filed: July 16, 2019
    Publication date: December 1, 2022
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Yoshinari ASANO, Keisuke OHTSUKA, Keiji AOTA, Mitsushi ITANO, Shun OHKUBO, Tatsuya TAKAKUWA, Daisuke KARUBE, Yuuki YOTSUMOTO, Kenji GOBOU, Hitomi KUROKI, Tomoyuki GOTOU, Akihito MIZUNO, Yasufu YAMADA, Tatsumi TSUCHIYA, Yuuichi YANAGI, Yoshikazu NAKAO, Takeo ABE, Yumi TODA, Tetsushi TSUDA
  • Patent number: 11509251
    Abstract: A motor driving device is a device for driving a motor including stator windings, includes: a connection switching unit that is connected to the stator windings, includes circuits including semiconductor switches, and switches connection condition of the stator windings to either of first connection condition and second connection condition different from the first connection condition by setting the semiconductor switches to ON or OFF; and an inverter that supplies AC drive voltages to the stator windings.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: November 22, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Arisawa, Takashi Yamakawa, Kenji Iwazaki, Keisuke Uemura, Atsushi Tsuchiya
  • Patent number: 11462391
    Abstract: A plasma processing apparatus includes an impedance matching circuit, a balun having a first unbalanced terminal connected to the impedance matching circuit, a grounded second unbalanced terminal, a first balanced terminal and a second balanced terminal, a grounded vacuum container, a first electrode electrically connected to the first balanced terminal, a second electrode electrically connected to the second balanced terminal, an adjustment reactance configured to affect a relationship between a first voltage applied to the first electrode and a second voltage applied to the second electrode, a high-frequency power supply configured to supply a high frequency between the first unbalanced terminal and the second unbalanced terminal via the impedance matching circuit, and a controller configured to control an impedance of the impedance matching circuit and a reactance of the adjustment reactance.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: October 4, 2022
    Assignee: CANON ANELVA CORPORATION
    Inventors: Masaharu Tanabe, Kazunari Sekiya, Tadashi Inoue, Hiroshi Sasamoto, Tatsunori Sato, Nobuaki Tsuchiya, Atsushi Takeda
  • Publication number: 20220212479
    Abstract: A liquid discharge method for a liquid discharge apparatus having a plurality of print modes includes determining and changing. The determining determines the print modes by a determiner. The changing changes, based on the print mode determined by the determiner, a use nozzle width and a discharge amount of a spot color head in a line feed direction such that a print mode having a low print speed has a narrower nozzle width and a larger discharge amount than a print mode having a high print speed by a controller.
    Type: Application
    Filed: May 27, 2020
    Publication date: July 7, 2022
    Inventors: Yosuke SAITO, Atsushi HADA, Yuki TSUCHIYA, Daisuke MEZAKI
  • Patent number: 11374525
    Abstract: A motor driving apparatus for driving a motor, the apparatus being connected to the motor by first, second, and third connection lines respectively corresponding to first, second, and third phases, the apparatus including: an inverter converting direct-current voltage into three-phase alternating-current voltage by using first, second, and third switching element pairs respectively connected to the first, second, and third connection lines, and outputting the three-phase alternating-current voltage to the motor; a voltage detection circuit detecting a first voltage based on a potential difference between a potential of the first connection line and a reference potential; and a control unit calculating a voltage value of the direct-current voltage based on the first voltage during a first period in which an upper-arm switching element of the first switching element pair is on, controlling operation of the inverter according to the voltage value, and changing the first period according to the voltage value.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: June 28, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Tsuchiya, Keisuke Uemura, Kazunori Hatakeyama
  • Patent number: 11368118
    Abstract: A motor driving device that is a device for driving a motor including stator windings, includes: a connection switching unit that includes relays as mechanical switches connected to the stator windings and excitation coils opening or closing the relays by being energized or non-energized with excitation current and switches connection condition of the stator windings to either of first connection condition (star connection) and second connection condition (delta connection) different from the first connection condition by opening or closing the relays; and an inverter that supplies AC drive voltages to the stator windings.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: June 21, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keisuke Uemura, Takashi Yamakawa, Kenji Iwazaki, Koichi Arisawa, Atsushi Tsuchiya
  • Patent number: 11329587
    Abstract: The motor driving apparatus includes a switch that is a mechanical switch for changing coil connection states of a motor; an inverter that generates alternating voltage from direct voltage and outputs the alternating voltage to the motor; and a control device that controls the switch and the inverter. The control device causes the switch to change the coil connection states while the alternating voltage output from the inverter is zero.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 10, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Tsuchiya, Kazunori Hatakeyama, Shinya Toyodome
  • Publication number: 20220060133
    Abstract: A motor driving device includes: a connection switcher that has an electromagnetic contactor connected to a winding of a motor and switches connection condition of the winding by switching condition of the electromagnetic contactor; an inverter to apply an output voltage as an AC voltage to the winding via the connection switcher; a short-circuiting circuit having a rectification circuit and a switch; and a controller to control the electromagnetic contactor, the inverter and the switch, wherein a circulating circuit is formed by the short-circuiting circuit and the winding when the switch is set at ON, and the connection switcher switches the connection condition of the winding in a period in which the output voltage of the inverter is set at zero in a rotating operation of the motor and a current caused by the rotating operation circulates in the circulating circuit.
    Type: Application
    Filed: March 6, 2019
    Publication date: February 24, 2022
    Inventors: Atsushi TSUCHIYA, Kazunori HATAKEYAMA, Shinya TOYODOME
  • Patent number: 11239788
    Abstract: A motor driving device includes an inverter to supply an alternating current, a switch unit that switches the number of at least one permanent magnet synchronous motor to which the alternating current is supplied from the inverter, a detector to detect a detection value corresponding to the alternating current supplied to the at least one permanent magnet synchronous motor, and a control device to control the inverter and the switch unit. The control device sets an overcurrent interruption threshold value at a value based on the number. When the detection value is greater than or equal to the overcurrent interruption threshold value, the control device makes the inverter stop the supplying of the alternating current to the at least one permanent magnet synchronous motor.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: February 1, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Atsushi Tsuchiya, Keisuke Uemura, Kazunori Hatakeyama, Yuichi Shimizu
  • Publication number: 20220006410
    Abstract: The motor driving apparatus includes a switch that is a mechanical switch for changing coil connection states of a motor; an inverter that generates alternating voltage from direct voltage and outputs the alternating voltage to the motor; and a control device that controls the switch and the inverter. The control device causes the switch to change the coil connection states while the alternating voltage output from the inverter is zero.
    Type: Application
    Filed: December 19, 2018
    Publication date: January 6, 2022
    Inventors: Atsushi TSUCHIYA, Kazunori HATAKEYAMA, Shinya TOYODOME
  • Publication number: 20210359634
    Abstract: A motor driving apparatus for driving a motor, the apparatus being connected to the motor by first, second, and third connection lines respectively corresponding to first, second, and third phases, the apparatus including: an inverter converting direct-current voltage into three-phase alternating-current voltage by using first, second, and third switching element pairs respectively connected to the first, second, and third connection lines, and outputting the three-phase alternating-current voltage to the motor; a voltage detection circuit detecting a first voltage based on a potential difference between a potential of the first connection line and a reference potential; and a control unit calculating a voltage value of the direct-current voltage based on the first voltage during a first period in which an upper-arm switching element of the first switching element pair is on, controlling operation of the inverter according to the voltage value, and changing the first period according to the voltage value.
    Type: Application
    Filed: November 7, 2018
    Publication date: November 18, 2021
    Inventors: Atsushi TSUCHIYA, Keisuke UEMURA, Kazunori HATAKEYAMA
  • Publication number: 20210184618
    Abstract: A motor driving device includes an inverter to supply an alternating current, a switch unit that switches the number of at least one permanent magnet synchronous motor to which the alternating current is supplied from the inverter, a detector to detect a detection value corresponding to the alternating current supplied to the at least one permanent magnet synchronous motor, and a control device to control the inverter and the switch unit. The control device sets an overcurrent interruption threshold value at a value based on the number. When the detection value is greater than or equal to the overcurrent interruption threshold value, the control device makes the inverter stop the supplying of the alternating current to the at least one permanent magnet synchronous motor.
    Type: Application
    Filed: June 14, 2018
    Publication date: June 17, 2021
    Inventors: Atsushi TSUCHIYA, Keisuke UEMURA, Kazunori HATAKEYAMA, Yuichi SHIMIZU
  • Patent number: 10766082
    Abstract: A cutting or grinding tool includes a blade. The blade includes a disc-shaped base metal, cutting or grinding tips (edges) provided on a peak (outer circumferential edge) of the base metal, and a protruding coating on a side face of the base metal along the entire outer circumference of the base metal.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: September 8, 2020
    Assignee: KANEFUSA KABUSHIKI KAISHA
    Inventors: Mikihiro Ando, Atsushi Tsuchiya
  • Patent number: 10594806
    Abstract: Mobile objects and resources are managed by a system including a mobile object server operable to receive information from a plurality of mobile objects in a geographic space, and an event server in communication with the mobile object server. The event server is operable to receive, from the mobile object server, resource utilization information indicating a resource in the geographic space that each mobile object is scheduled to use, calculate a state of use of the resource based on a predicted arrival time of each mobile object at the resource, and send a recommendation for relaxing congestion of the resource.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: March 17, 2020
    Assignee: International Business Machines Corporation
    Inventors: Hiromi Ishikawa, Atsushi Tsuchiya, Gaku Yamamoto
  • Publication number: 20200021225
    Abstract: A motor driving device that is a device for driving a motor including stator windings, includes: a connection switching unit that includes relays as mechanical switches connected to the stator windings and excitation coils opening or closing the relays by being energized or non-energized with excitation current and switches connection condition of the stator windings to either of first connection condition (star connection) and second connection condition (delta connection) different from the first connection condition by opening or closing the relays; and an inverter that supplies AC drive voltages to the stator windings.
    Type: Application
    Filed: October 31, 2016
    Publication date: January 16, 2020
    Inventors: Keisuke UEMURA, Takashi YAMAKAWA, Kenji IWAZAKI, Koichi ARISAWA, Atsushi TSUCHIYA
  • Publication number: 20200018534
    Abstract: A motor driving device and an air conditioner are capable of increasing the efficiency in a low speed region in which a motor performs low speed rotation. The motor driving device that is a motor driving device for driving a motor including stator windings, includes: a connection switching unit that switches connection condition of the stator windings to either of first connection condition and second connection condition different from the first connection condition; and an inverter that converts a DC voltage into AC drive voltages and supplies the AC drive voltages to the stator windings. The inverter includes MOS transistors as switching elements.
    Type: Application
    Filed: October 31, 2016
    Publication date: January 16, 2020
    Inventors: Atsushi TSUCHIYA, Takashi YAMAKAWA, Kenji IWAZAKI, Keisuke UEMURA, Koichi ARISAWA
  • Publication number: 20200021223
    Abstract: A motor driving device is a device for driving a motor including stator windings, includes: a connection switching unit that is connected to the stator windings, includes circuits including semiconductor switches, and switches connection condition of the stator windings to either of first connection condition and second connection condition different from the first connection condition by setting the semiconductor switches to ON or OFF; and an inverter that supplies AC drive voltages to the stator windings.
    Type: Application
    Filed: October 31, 2016
    Publication date: January 16, 2020
    Inventors: Koichi ARISAWA, Takashi YAMAKAWA, Kenji IWAZAKI, Keisuke UEMURA, Atsushi TSUCHIYA
  • Patent number: 10201994
    Abstract: A head unit of an ink jet printer is formed with a mist removing space for removing an ink mist generated when an UV ink is discharged by an ink jet head from a gap between the head unit and a table, where the mist removing space is formed with a gas introducing port, arranged at a position between the ink jet head and the LED, for the gas to be introduced from the gap side between the head unit and the table to the mist removing space, an intake port for the gas to be suctioned from the mist removing space toward a sirocco fan side by an airflow generated by the sirocco fan, and a gas discharging port, arranged separately from the intake port, for the gas to be discharged from the mist removing space.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: February 12, 2019
    Assignee: MIMAKI ENGINEERING CO., LTD.
    Inventor: Atsushi Tsuchiya