Patents by Inventor Kenji Nakai

Kenji Nakai 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: 11955919
    Abstract: An electric motor system includes a battery, an inverter, an electric motor, a zero-phase switching arm and a control unit. The inverter converts DC power output from the battery into three-phase AC power and outputs the three-phase AC power to the electric motor. A rotor of the electric motor rotates by the three-phase AC power output from the inverter. A neural point of the electric motor is connected to the zero-phase switching arm. A zero-phase current flowing through respective windings of the electric motor is adjusted by switching of the zero-phase switching arm. By this means, in the electric motor system, torque is generated at the rotor also using the zero-phase current as well as a three-phase AC current flowing through the respective windings.
    Type: Grant
    Filed: June 21, 2021
    Date of Patent: April 9, 2024
    Assignee: DENSO CORPORATION
    Inventors: Makoto Taniguchi, Kazunari Moriya, Kenji Hiramoto, Hideo Nakai, Yuuko Ohtani, Shinya Urata, Masafumi Namba
  • Publication number: 20230320054
    Abstract: A device management apparatus includes a board working machine and a management section. The board working machine includes a first slot and a second slot, and performs a predetermined board work on a board to produce a board product. The first slot can hold a device used in the production of the board product. The second slot can preliminarily hold the device that is scheduled to be used in the production of the board product or can temporarily hold the device that has become unnecessary in the production of the board product. The management section updates a control program for controlling the device of a target device requiring update of the control program in the second slot.
    Type: Application
    Filed: September 14, 2020
    Publication date: October 5, 2023
    Applicant: FUJI CORPORATION
    Inventors: Kenji NAKAI, Nobuhisa KOMIYAMA, Akira HARA, Yuichi SHIMAMOTO
  • Publication number: 20230084116
    Abstract: A malfunction determining device includes a head including a pickup member for picking up a component, a moving device configured to move the head, an inspection section, a determining section, and a notification section. The inspection section executes multiple inspections including a first inspection for performing a mounting operation under control of the head and the moving device to inspect whether the mounting operation is good or bad, and a second inspection for performing a calibration measurement of the head to inspect whether the calibration measurement is good or bad. The determining section determines presence or absence of a malfunction and a malfunction location in the head and the moving device based on a combination of results of the multiple inspections.
    Type: Application
    Filed: February 26, 2020
    Publication date: March 16, 2023
    Applicant: FUJI CORPORATION
    Inventors: Yuki KAMIYA, Shinji NAITO, Kenji NAKAI, Daisuke YAMANAKA
  • Publication number: 20220326689
    Abstract: A trace assistance device includes a memory section, an acquisition section, and an output section. The memory section stores a manipulation log and an operation log. When a predetermined trigger event occurs during the board work, the acquisition section acquires at least one target manipulation history related to the trigger event, a target operation history associated with the target manipulation history, a comparison manipulation history that is the same as or similar to the target manipulation history, and a comparison operation history associated with the comparison manipulation history from the manipulation log and the operation log stored in the memory device. The output section is configured to output an operation of the board production line recorded in the target operation history and an operation of the board production line recorded in the comparison operation history, which are acquired by the acquisition section, in a comparable manner.
    Type: Application
    Filed: September 11, 2019
    Publication date: October 13, 2022
    Applicant: FUJI CORPORATION
    Inventor: Kenji NAKAI
  • Patent number: 10979240
    Abstract: A substrate work system is provided which can reduce the time taken to deal with a communication error by notifying information on the communication error. First confirmation processing section of mounting device determines a cause for a communication error in a communication line between two devices in response to an occurrence of a communication error in first network. Display device displays a result of the confirmation by first confirmation processing section in addition to a message informing that a communication error occurs in first network. As a result, an operator of substrate work system can confirm in which communication path or the like the communication error is possibly occurring in first network by checking the content displayed on display device.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: April 13, 2021
    Assignee: FUJI CORPORATION
    Inventor: Kenji Nakai
  • Patent number: 10860193
    Abstract: A development support system includes: a first information processing apparatus including a storage that stores identification information of a plurality of screens according to a display application type; and a second information processing apparatus including an input interface that accepts registration of screen design information including designation of identification information of any screen, as a transition source screen or a transition destination screen, among the identification information of the plurality of screens, and a communication circuit that transmits the accepted screen design information to the first information processing apparatus, wherein the first information processing apparatus includes a communication circuit that refers to the storage when providing screen data to a first display application according to the screen design information, and the communication circuit performs a transmission, to the first display application, including a command to display a screen by a second displa
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: December 8, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Kenji Nakai, Kazuo Yamakawa
  • Publication number: 20200084059
    Abstract: A substrate work system is provided which can reduce the time taken to deal with a communication error by notifying information on the communication error. First confirmation processing section of mounting device determines a cause for a communication error in a communication line between two devices in response to an occurrence of a communication error in first network. Display device displays a result of the confirmation by first confirmation processing section in addition to a message informing that a communication error occurs in first network. As a result, an operator of substrate work system can confirm in which communication path or the like the communication error is possibly occurring in first network by checking the content displayed on display device.
    Type: Application
    Filed: December 12, 2016
    Publication date: March 12, 2020
    Applicant: FUJI CORPORATION
    Inventor: Kenji NAKAI
  • Patent number: 10339348
    Abstract: A reading device including an identification information reading device which reads the identification information, a holding device which holds an identification information application member, a moving device which moves the holding device relative to the identification information reading device, and a control device which controls operations of the identification information reading device, the holding device, and the moving device. The control device causes the holding device to move using the moving device such that at least a portion of the holding region in which the holding device holds the identification information application member is a reading region to move the identification information application member and is configured to perform a first reading process which carries out a reading process of the identification information using the identification information in a state in which holding of the identification information application member using the holding device is released.
    Type: Grant
    Filed: February 16, 2015
    Date of Patent: July 2, 2019
    Assignee: FUJI CORPORATION
    Inventor: Kenji Nakai
  • Patent number: 10032650
    Abstract: A die mounting system in which die supply device is set on component mounter and dies supplied from die supply device are mounted on circuit board by mounting head of component mounter, determines the next die transfer position is determined such that the longer of time required for die transfer preparation operation (die imaging and image processing, die pickup operation, and movement and vertical inverting operation of a supply head) of die supply device and time required for die mounting operation (movement and vertical motion at the mounting position of mounting head) of component mounter is made shorter, and the difference (which corresponds to the waiting time at the die transfer position) between the two times decreased, such that the cycle time is shortened.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: July 24, 2018
    Assignee: FUJI MACHINE MFG. CO., LTD.
    Inventors: Yukinori Nakayama, Kenji Nakai, Satoshi Yoshioka
  • Publication number: 20180107368
    Abstract: A development support system includes: a first information processing apparatus including a storage that stores identification information of a plurality of screens according to a display application type; and a second information processing apparatus including an input interface that accepts registration of screen design information including designation of identification information of any screen, as a transition source screen or a transition destination screen, among the identification information of the plurality of screens, and a communication circuit that transmits the accepted screen design information to the first information processing apparatus, wherein the first information processing apparatus includes a communication circuit that refers to the storage when providing screen data to a first display application according to the screen design information, and the communication circuit performs a transmission, to the first display application, including a command to display a screen by a second displa
    Type: Application
    Filed: August 30, 2017
    Publication date: April 19, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Kenji Nakai, Kazuo Yamakawa
  • Patent number: 9887111
    Abstract: In a die mounting system in which a die supply device is set on a component mounter and dies supplied from a die supply device are mounted on a circuit board by a mounting head of the component mounter, the position of a die is recognized by processing an image of the die on a dicing sheet captured by a camera, a supply head is moved to a die pickup position by a supply head moving mechanism, the die is picked up, the supply head is vertically inverted and moved to a die transfer position, and the die held by the supply head is picked up by a mounting head of the component mounter at a component transfer position and mounted on the circuit board. The die transfer position is set at a position such that die transfer and die imaging are able to be performed in parallel.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: February 6, 2018
    Assignee: FUJI MACHINE MFG. CO., LTD.
    Inventors: Yukinori Nakayama, Kenji Nakai, Satoshi Yoshioka
  • Publication number: 20180032773
    Abstract: A reading device including an identification information reading device which reads the identification information, a holding device which holds an identification information application member, a moving device which moves the holding device relative to the identification information reading device, and a control device which controls operations of the identification information reading device, the holding device, and the moving device. The control device causes the holding device to move using the moving device such that at least a portion of the holding region in which the holding device holds the identification information application member is a reading region to move the identification information application member and is configured to perform a first reading process which carries out a reading process of the identification information using the identification information in a state in which holding of the identification information application member using the holding device is released.
    Type: Application
    Filed: February 16, 2015
    Publication date: February 1, 2018
    Applicant: FUJI MACHINE MFG. CO., LTD.
    Inventor: Kenji NAKAI
  • Publication number: 20170140960
    Abstract: In a die mounting system in which a die supply device is set on a component mounter and dies supplied from a die supply device are mounted on a circuit board by a mounting head of the component mounter, the position of a die is recognized by processing an image of the die on a dicing sheet captured by a camera, a supply head is moved to a die pickup position by a supply head moving mechanism, the die is picked up, the supply head is vertically inverted and moved to a die transfer position, and the die held by the supply head is picked up by a mounting head of the component mounter at a component transfer position and mounted on the circuit board. The die transfer position is set at a position such that die transfer and die imaging are able to be performed in parallel.
    Type: Application
    Filed: March 24, 2014
    Publication date: May 18, 2017
    Applicant: FUJI MACHINE MFG. CO., LTD.
    Inventors: Yukinori NAKAYAMA, Kenji NAKAI, Satoshi YOSHIOKA
  • Publication number: 20170110342
    Abstract: A die mounting system in which die supply device is set on component mounter and dies supplied from die supply device are mounted on circuit board by mounting head of component mounter, determines the next die transfer position is determined such that the longer of time required for die transfer preparation operation (die imaging and image processing, die pickup operation, and movement and vertical inverting operation of a supply head) of die supply device and time required for die mounting operation (movement and vertical motion at the mounting position of mounting head) of component mounter is made shorter, and the difference (which corresponds to the waiting time at the die transfer position) between the two times decreased, such that the cycle time is shortened.
    Type: Application
    Filed: March 24, 2014
    Publication date: April 20, 2017
    Applicant: FUJI MACHINE MFG. CO., LTD.
    Inventors: Yukinori NAKAYAMA, Kenji NAKAI, Satoshi YOSHIOKA
  • Patent number: 9590431
    Abstract: A battery controller that performs current limitation in consideration of limitation on other components than a battery main body and the state of health of a battery is provided. A battery controller limits a battery current using allowable average current information describing current average values respectively allowed for a plurality of time windows. When the battery is deteriorated, an allowable average current obtained by subtraction in response to the state of health is used. Further, when the battery current exceeds an upper limit value stored in advance, the battery current is controlled with the upper limit reduced by the excessive amount.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: March 7, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Keiichiro Ohkawa, Kenji Nakai, Hiroshi Morikawa
  • Patent number: 9557388
    Abstract: A battery control device calculates at least one of an allowable current and an allowable power during charge/discharge of a battery from a no-load voltage and an internal resistance of the battery, and corrects at least one of the no-load voltage and the internal resistance according to the states of charge/discharge of the battery.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: January 31, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshinori Aoshima, Hiroshi Morikawa, Kenji Nakai, Keiichiro Ohkawa
  • Patent number: 9077043
    Abstract: The present invention is a secondary battery, including: an electrode group that includes a positive electrode and a negative electrode, an electrolyte, and a battery cell container that contains the electrode group and the electrolyte and that is sealed, wherein: an adhesive layer for trapping foreign matter present inside the battery cell container is disposed in the battery cell container by exposing at least part of the adhesive layer so as to allow the adhesive layer to come into contact with the electrolyte.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: July 7, 2015
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuichi Takatsuka, Katsunori Suzuki, Sho Matsumoto, Kenji Nakai, Tatsuhiko Kawasaki, Hirofumi Takahashi, Yoshio Onodera
  • Publication number: 20150108991
    Abstract: A battery control device calculates at least one of an allowable current and an allowable power during charge/discharge of a battery from a no-load voltage and an internal resistance of the battery, and corrects at least one of the no-load voltage and the internal resistance according to the states of charge/discharge of the battery.
    Type: Application
    Filed: May 24, 2012
    Publication date: April 23, 2015
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshinori Aoshima, Hiroshi Morikawa, Kenji Nakai, Keiichiro Ohkawa
  • Patent number: 8928282
    Abstract: The present invention is a control system for an assembled battery that controls an assembled battery comprising a plurality of cells, including: a bypass circuit connected in parallel to each cell of the cells, and comprising a switching element and a resistor connected in series; and a control circuit that controls a bypass current flowing in the bypass circuit by opening and closing the switching element, in order to discharge the cell; wherein the bypass circuit is set so that a current of a same magnitude as a self-discharge current in a predetermined overcharged states of the cell flow in the bypass circuit.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: January 6, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Akihiko Kudo, Kenji Nakai
  • Publication number: 20140339891
    Abstract: A battery controller that performs current limitation in consideration of limitation on other components than a battery main body and the state of health of a battery is provided. A battery controller limits a battery current using allowable average current information describing current average values respectively allowed for a plurality of time windows. When the battery is deteriorated, an allowable average current obtained by subtraction in response to the state of health is used. Further, when the battery current exceeds an upper limit value stored in advance, the battery current is controlled with the upper limit reduced by the excessive amount.
    Type: Application
    Filed: December 22, 2011
    Publication date: November 20, 2014
    Inventors: Keiichiro Ohkawa, Kenji Nakai, Hiroshi Morikawa