Patents by Inventor Yasuaki Matsumoto

Yasuaki Matsumoto 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: 11211882
    Abstract: A thyristor starter accelerates a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In the thyristor starter, during a first time period from start of performance of the second mode to arrival of the induced voltage of the synchronous machine at a first voltage value, a phase control angle of the inverter is changed such that a value thereof becomes larger as a rotation speed of the synchronous machine becomes higher.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: December 28, 2021
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Hironori Kawaguchi, Akinobu Ando, Hiroshi Ogino, Yasuaki Matsumoto
  • Patent number: 11097917
    Abstract: A sheet supporting apparatus includes first and second units. The first unit includes a first housing, first and second lock portions, a first shaft configured to be supported rotatably with respect to the first housing and to turnably support the first lock portion, and a second shaft configured to be supported rotatably with respect to the first housing and to turnably support the second lock portion. The second unit includes a second housing and first and second engagement portions provided in the second housing and configured to engage respectively with the first and second lock portions. The first and second shafts are disposed such that extension lines of rotational axes of the first and second shafts cross with each other in a plan view.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: August 24, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yasuaki Matsumoto
  • Patent number: 11091334
    Abstract: A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: August 17, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiko Aono, Yasuaki Matsumoto
  • Publication number: 20210218358
    Abstract: In a thyristor starter, an inverter converts DC power provided from a converter through a DC reactor into AC power having a variable frequency, and supplies the AC power to a synchronous machine. A controller controls the inverter based on a phase control angle. A voltage regulator regulates an induced voltage of the synchronous machine by supplying a field current to the synchronous machine. When a rotation speed of the synchronous machine exceeds a reference rotation speed during acceleration of the synchronous machine, the voltage regulator controls the field current such that the induced voltage increases with an increase in the rotation speed of the synchronous machine. The controller decreases a rate of increase in the phase control angle relative to the rotation speed of the synchronous machine, as compared with when the rotation speed of the synchronous machine is less than the reference rotation speed.
    Type: Application
    Filed: January 4, 2019
    Publication date: July 15, 2021
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Takahiro OTA, Hironori KAWAGUCHI, Hiroshi OGINO, Yasuaki MATSUMOTO, Akinobu ANDO
  • Publication number: 20210198070
    Abstract: A sheet conveyance apparatus includes a first guide, a second guide configured to form a conveyance path together with the first guide, a conveyance portion, a pressing portion configured to press the sheet against the first guide, an urging portion configured to urge the pressing portion in an urging direction toward the first guide, a receiving member configured to hold the pressing portion and receive a reaction force of the urging portion, and a detection unit including a first detection, and a second detection portion, wherein the second guide provided with the second detection portion, and the receiving member are movably disposed with respect to the first guide provided with the first detection portion respectively, and are configured to be positioned with respect to the first guide independently from each other.
    Type: Application
    Filed: December 18, 2020
    Publication date: July 1, 2021
    Inventor: Yasuaki Matsumoto
  • Publication number: 20210152104
    Abstract: A thyristor starter accelerates a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In the thyristor starter, during a first time period from start of performance of the second mode to arrival of the induced voltage of the synchronous machine at a first voltage value, a phase control angle of the inverter is changed such that a value thereof becomes larger as a rotation speed of the synchronous machine becomes higher.
    Type: Application
    Filed: June 21, 2017
    Publication date: May 20, 2021
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Hironori KAWAGUCHI, Akinobu ANDO, Hiroshi OGINO, Yasuaki MATSUMOTO
  • Publication number: 20210091693
    Abstract: A converter controller configured to control a firing phase of a converter includes an integral element integrating a deviation of DC current from a current command value and generates a voltage command value of output voltage of the converter by performing control calculation of the deviation. In a first mode of performing commutation of an inverter by intermittently setting DC current to zero, the converter controller sets DC current to zero for a predetermined pause time by narrowing a phase control angle simultaneously with a commutation command for the inverter. When the control calculation is resumed immediately after the pause time, the converter controller uses a control amount calculated in control calculation immediately before the pause time as a preset value of the integral element immediately after the pause time.
    Type: Application
    Filed: February 19, 2018
    Publication date: March 25, 2021
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Hironori KAWAGUCHI, Hiroshi OGINO, Yasuaki MATSUMOTO, Akinobu ANDO
  • Publication number: 20210083602
    Abstract: A thyristor starter is configured to accelerate a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. The thyristor starter is further configured to raise induced voltage in proportion to the rotation speed of the synchronous machine by keeping field current constant and to suppress rise of the induced voltage by reducing the field current after the induced voltage reaches a first voltage value, in the first mode.
    Type: Application
    Filed: June 21, 2017
    Publication date: March 18, 2021
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yasuaki MATSUMOTO, Hiroshi OGINO, Hironori KAWAGUCHI, Akinobu ANDO, Ryoji MIYATAKE, Michio KATAOKA
  • Patent number: 10951144
    Abstract: A thyristor starter is configured to accelerate a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In a first case in which a first synchronous machine having a first inductance is started, a switching rotation speed for switching from the first mode to the second mode is set to a higher rotation speed, compared with a second case in which a second synchronous machine having a second inductance larger than the first inductance is started.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: March 16, 2021
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yasuaki Matsumoto, Hiroshi Ogino, Hironori Kawaguchi, Akinobu Ando
  • Publication number: 20210061597
    Abstract: A sheet feeding apparatus includes a sheet supporting portion configured to support a sheet, a feeding member configured to contact an upper surface of the sheet supported on the sheet supporting portion and feed the sheet, a drive motor configured to rotate in a first direction and in a second direction opposite to the first direction, and a lifting mechanism connected to the drive motor and configured to lift the sheet supporting portion and lower the feeding member in a case where the drive motor rotates in the first direction, and to lower the sheet supporting portion and lift the feeding member in a case where the drive motor rotates in the second direction.
    Type: Application
    Filed: July 23, 2020
    Publication date: March 4, 2021
    Inventor: Yasuaki Matsumoto
  • Publication number: 20200177111
    Abstract: A thyristor starter accelerates a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. A second controller controls the firing phase of a thyristor in a converter such that DC output current of the converter matches a current command value, based on a detection signal of a position detector. In the first mode, the current command value is set such that the current value is higher as the rotation speed of the synchronous machine is higher.
    Type: Application
    Filed: June 21, 2017
    Publication date: June 4, 2020
    Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yasuaki MATSUMOTO, Hiroshi OGINO, Hironori KAWAGUCHI, Akinobu ANDO
  • Publication number: 20200076339
    Abstract: A thyristor starter is configured to accelerate a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In a first case in which a first synchronous machine having a first inductance is started, a switching rotation speed for switching from the first mode to the second mode is set to a higher rotation speed, compared with a second case in which a second synchronous machine having a second inductance larger than the first inductance is started.
    Type: Application
    Filed: June 21, 2017
    Publication date: March 5, 2020
    Inventors: Yasuaki MATSUMOTO, Hiroshi OGINO, Hironori KAWAGUCHI, Akinobu ANDO
  • Publication number: 20190367301
    Abstract: A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.
    Type: Application
    Filed: August 15, 2019
    Publication date: December 5, 2019
    Inventors: Kazuhiko Aono, Yasuaki Matsumoto
  • Patent number: 10435258
    Abstract: A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: October 8, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiko Aono, Yasuaki Matsumoto
  • Publication number: 20190106286
    Abstract: A sheet supporting apparatus includes first and second units. The first unit includes a first housing, first and second lock portions, a first shaft configured to be supported rotatably with respect to the first housing and to turnably support the first lock portion, and a second shaft configured to be supported rotatably with respect to the first housing and to turnably support the second lock portion. The second unit includes a second housing and first and second engagement portions provided in the second housing and configured to engage respectively with the first and second lock portions. The first and second shafts are disposed such that extension lines of rotational axes of the first and second shafts cross with each other in a plan view.
    Type: Application
    Filed: December 4, 2018
    Publication date: April 11, 2019
    Inventor: Yasuaki Matsumoto
  • Patent number: 10254698
    Abstract: A sheet feeding device includes: a main assembly; a holding unit detachably mountable to the main assembly; a portion-to-be-engaged provided on the main assembly; a rotatable member, provided in the holding unit, for feeding a sheet; and a guiding member for guiding feeding of the sheet. The guiding member is provided in the holding unit and includes an engaging portion engageable with the portion-to-be-engaged. The guiding member is movable between an engaging position where the portion-to-be-engaged and the engaging portion are engaged with each other to guide the sheet and a guiding position where the portion-to-be-engaged and the engaging portion are disengaged from each other to guide demounting and mounting of the holding unit.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: April 9, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuaki Matsumoto
  • Publication number: 20190098707
    Abstract: A heating apparatus (2) includes a high frequency power supply (3), a left conductive plate (4), a right conductive plate (5), a left heating coil (11), and a right heating coil (12). The left heating coil (11) includes a left conductor portion (21). The left conductor portion (21) faces a gear tooth (7a) of a helical gear (7) and extends in a direction orthogonal to the direction in which the gear tooth (7a) extends. The left heating coil (11) includes a focusing magnetic body (31) which focuses magnetic flux in the left conductor portion (21) and concentrates the magnetic flux on a surface of the gear tooth (7a). The left heating coil (11) includes an upper inducing magnetic body (32) which induces a part of the magnetic flux flowing in a tooth root of the gear tooth (7a) into a tooth tip of the gear tooth (7a).
    Type: Application
    Filed: September 13, 2018
    Publication date: March 28, 2019
    Inventors: Masayuki Orihara, Hiroaki Mase, Yasuaki Matsumoto, Junko Tanaka, Ryosuke Fukuchi, Hiroko Watanabe, Yasufumi Nakai, Akihiro Hanaki
  • Patent number: 10173856
    Abstract: A sheet supporting apparatus includes first and second units. The first unit includes a first housing, first and second lock portions, a first shaft configured to be supported rotatably with respect to the first housing and to turnably support the first lock portion, and a second shaft configured to be supported rotatably with respect to the first housing and to turnably support the second lock portion. The second unit includes a second housing and first and second engagement portions provided in the second housing and configured to engage respectively with the first and second lock portions. The first and second shafts are disposed such that extension lines of rotational axes of the first and second shafts cross with each other in a plan view.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: January 8, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yasuaki Matsumoto
  • Patent number: 9991883
    Abstract: A thyristor switch is constituted of a pair of arms connected in anti-parallel, each of the arms including a plurality of thyristors connected in series. A controller includes a phase detecting unit configured to detect a phase of a power supply voltage supplied from an alternating-current power supply, and a gate signal generating unit configured to interrupt a gate signal when an open command is provided to the static switch and the phase of the power supply voltage detected by the phase detecting unit matches a target phase. The target phase is set outside of a phase range where interruption of the gate signal is prohibited, the phase range being set so as to include a zero crossing point at which a load current is switched in polarity.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: June 5, 2018
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yasuaki Matsumoto, Akinobu Ando, Yasuhiko Hosokawa
  • Publication number: 20180120726
    Abstract: A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.
    Type: Application
    Filed: October 27, 2017
    Publication date: May 3, 2018
    Inventors: Kazuhiko Aono, Yasuaki Matsumoto