Patents by Inventor Wataru Nakayama

Wataru Nakayama 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: 10833623
    Abstract: An electric power control unit configured to control drive power of a three-phase alternating current to be supplied to an electric motor may include: an inverter configured to convert a direct current to the three-phase alternating current; first and second current sensors, each of which is configured to measure a first-phase current in the three-phase alternating current; third and fourth current sensors, each of which is configured to measure a second-phase current in the three-phase alternating current; and a controller configured to control the inverter, and under a condition in which the first current sensor fails, when measured values of the second, the third, and the fourth current sensors do not coincide with each other while the inverter is shut down, the controller may stop to further supply the drive power to the electric motor.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: November 10, 2020
    Assignee: Denso Corporation
    Inventor: Wataru Nakayama
  • Patent number: 10809137
    Abstract: A method of estimating a temperature of a reactor provided in a boost converter disclosed herein, a temperature of a bus bar connected with the reactor and a current flowing in the bus bar are measured; when an absolute value of a DC component ILdc of the measured current exceeds a current threshold Ith, an estimated value of the temperature of the reactor is calculated by adding a first correction value, which depends on the DC component ILdc, to the measured temperature TL and is outputted as an estimated temperature TR; and when the absolute value of the DC component is lower than the current threshold Ith, the estimated value of the temperature of the reactor is calculated by adding a second correction value, which does not depend on the measured current, to the measured temperature and is outputted as the estimated temperature TR.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: October 20, 2020
    Assignee: DENSO CORPORATION
    Inventor: Wataru Nakayama
  • Publication number: 20200276717
    Abstract: A fixing apparatus that fixes a robot having a robot main body mounted on a truck to an external structure in a positioning state, the truck being capable of traveling on a floor surface, the apparatus including: a first unit provided in one of the robot and the external structure; a second unit provided in the other of the robot and the external structure; a positioning mechanism that determines relative relation between the truck and the robot, and the external structure by use of the first unit and the second unit; and a lock mechanism that locks the truck and the robot, and the external structure.
    Type: Application
    Filed: January 21, 2020
    Publication date: September 3, 2020
    Applicant: FANUC CORPORATION
    Inventors: Wataru MURAKAMI, Kazutaka NAKAYAMA
  • Patent number: 10562128
    Abstract: An oscillation jig includes: an oscillation jig base connected to an oscillation table; a first clamp member provided in the oscillation jig base; a second clamp member located at a position opposed to the first clamp member in an oscillation direction and configured to hold a first metal component together with the first clamp member; a link mechanism provided in the oscillation jig base, composed of a plurality of links connected together, connected to the second clamp member, and caused to extend and contract in the oscillation direction; and a clamp actuator configured to cause the link mechanism to extend and contract in the oscillation direction. When the first clamp member and the second clamp member hold the first metal component, a connection center line connecting connection centers of the respective links is made straight in the oscillation direction.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: February 18, 2020
    Assignee: IHI Corporation
    Inventors: Nozomu Asano, Yasushi Dodo, Yuichiro Nakayama, Miki Shinagawa, Wataru Ueda
  • Patent number: 10393774
    Abstract: A bus bar module equipped with a current sensor includes a first bus bar, a second bus bar, a substrate, and a first magnetoelectric transducer. The first bus bar has a first notch. The second bus bar has a second notch and is placed in parallel to the first bus bar. The second notch is provided at a position different from the first notch in an extending direction of the first bus bar. The substrate is fitted to both the first notch and the second notch. Further, the substrate is sandwiched between those side surfaces of the first bus bar and the second bus bar which are opposed to each other. The first magnetoelectric transducer is placed inside the first notch and fixed to the substrate.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: August 27, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Wataru Nakayama, Kenji Goto
  • Patent number: 10355215
    Abstract: An object of the present invention is to provide a composition for forming an organic semiconductor film that makes it possible to obtain an organic semiconductor film having excellent mobility and uniformity thereof, an organic semiconductor element including an organic semiconductor film having excellent mobility and uniformity thereof, and a method for manufacturing the organic semiconductor element. The composition for forming an organic semiconductor film of the present invention contains an organic semiconductor as a component A and a polymer chemically modified some or all of the ethylenically unsaturated double bonds of a ethylenically unsaturated double bond-containing polymer, as a component B.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: July 16, 2019
    Assignee: FUJIFILM CORPORATION
    Inventors: Takafumi Nakayama, Wataru Kikuchi, Kensuke Masui
  • Publication number: 20190190432
    Abstract: An electric power control unit configured to control drive power of a three-phase alternating current to be supplied to an electric motor may include: an inverter configured to convert a direct current to the three-phase alternating current; first and second current sensors, each of which is configured to measure a first-phase current in the three-phase alternating current; third and fourth current sensors, each of which is configured to measure a second-phase current in the three-phase alternating current; and a controller configured to control the inverter, and under a condition in which the first current sensor fails, when measured values of the second, the third, and the fourth current sensors do not coincide with each other while the inverter is shut down, the controller may stop to further supply the drive power to the electric motor.
    Type: Application
    Filed: December 11, 2018
    Publication date: June 20, 2019
    Inventor: Wataru Nakayama
  • Patent number: 10295571
    Abstract: A bus bar module includes a first bus bar, a second bus bar, and a first magnetoelectric transducer. The second bus bar is placed in parallel to the first bus bar. The first magnetoelectric transducer is placed so as to be opposed to a side surface of the first bus bar. A sectional area of the first bus bar is smaller than a sectional area of the second bus bar in a first section. The first section is a section passing through the first magnetoelectric transducer and perpendicular to an extending direction of the first and second bus bars.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: May 21, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Wataru Nakayama, Kenji Goto
  • Publication number: 20190078943
    Abstract: A method of estimating a temperature of a reactor provided in a boost converter disclosed herein, a temperature of a bus bar connected with the reactor and a current flowing in the bus bar are measured; when an absolute value of a DC component ILdc of the measured current exceeds a current threshold Ith, an estimated value of the temperature of the reactor is calculated by adding a first correction value, which depends on the DC component ILdc, to the measured temperature TL and is outputted as an estimated temperature TR; and when the absolute value of the DC component is lower than the current threshold Ith, the estimated value of the temperature of the reactor is calculated by adding a second correction value, which does not depend on the measured current, to the measured temperature and is outputted as the estimated temperature TR.
    Type: Application
    Filed: July 24, 2018
    Publication date: March 14, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Wataru NAKAYAMA
  • Patent number: 10184960
    Abstract: A current sensor is configured to measure current flowing in two bus bars aligned in an X direction and extending parallel in a Y direction. A sensing element is arranged such that its magnetism sensing direction is oriented in the X direction on a line passing through the bus bar in a Z direction. A pair of shield plates sandwiches the bus bar and the sensing element therebetween in the Z direction. The bus bar is located between the sensing element and the lower shield plate. The sensing element is located closer to the upper shield plate than to the lower shield plate. At least one of a thickness and a magnetic permeability of the magnetism shield plates is greater in the upper shield plate than in the lower shield plate.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: January 22, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Wataru Nakayama
  • Patent number: 10153720
    Abstract: A power supply system for an electric vehicle includes a battery, an inverter configured to supply alternating-current electric power to a motor for traveling, a first voltage converter connected between the battery and the inverter, a second voltage converter connected in parallel with the first voltage converter, a temperature acquisition unit configured to acquire a temperature of the first voltage converter, a current acquisition unit configured to acquire magnitude of a current flowing in the second voltage converter, and a controller. Each of the first voltage converter and the second voltage converter includes two switching elements, two diodes, and a reactor.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: December 11, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Wataru Nakayama
  • Publication number: 20180175774
    Abstract: A power supply system for an electric vehicle includes a battery, an inverter configured to supply alternating-current electric power to a motor for traveling, a first voltage converter connected between the battery and the inverter, a second voltage converter connected in parallel with the first voltage converter, a temperature acquisition unit configured to acquire a temperature of the first voltage converter, a current acquisition unit configured to acquire magnitude of a current flowing in the second voltage converter, and a controller. Each of the first voltage converter and the second voltage converter includes two switching elements, two diodes, and a reactor.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 21, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Wataru NAKAYAMA
  • Publication number: 20180120358
    Abstract: Two sensor chips house respective magnetoelectric transducers. The two sensor chips are disposed in the gap. The two sensor chips are disposed such that a magnetic induction direction of each of the two sensor chips is the same as a normal direction of end faces of the magnetism-collecting core, the end faces facing the gap, and the two sensor chips are disposed in an axially symmetric manner to a straight line passing through a center of the gap.
    Type: Application
    Filed: October 10, 2017
    Publication date: May 3, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Wataru NAKAYAMA
  • Publication number: 20180031613
    Abstract: A current sensor is configured to measure current flowing in two bus bars aligned in an X direction and extending parallel in a Y direction. A sensing element is arranged such that its magnetism sensing direction is oriented in the X direction on a line passing through the bus bar in a Z direction. A pair of shield plates sandwiches the bus bar and the sensing element therebetween in the Z direction. The bus bar is located between the sensing element and the lower shield plate. The sensing element is located closer to the upper shield plate than to the lower shield plate. At least one of a thickness and a magnetic permeability of the magnetism shield plates is greater in the upper shield plate than in the lower shield plate.
    Type: Application
    Filed: March 10, 2016
    Publication date: February 1, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Wataru NAKAYAMA
  • Publication number: 20170003323
    Abstract: A bus bar module equipped with a current sensor includes a first bus bar, a second bus bar, a substrate, and a first magnetoelectric transducer. The first bus bar has a first notch. The second bus bar has a second notch and is placed in parallel to the first bus bar. The second notch is provided at a position different from the first notch in an extending direction of the first bus bar. The substrate is fitted to both the first notch and the second notch. Further, the substrate is sandwiched between those side surfaces of the first bus bar and the second bus bar which are opposed to each other. The first magnetoelectric transducer is placed inside the first notch and fixed to the substrate.
    Type: Application
    Filed: December 3, 2014
    Publication date: January 5, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Wataru NAKAYAMA, Kenji GOTO
  • Publication number: 20160299176
    Abstract: A bus bar module includes a first bus bar, a second bus bar, and a first magnetoelectric transducer. The second bus bar is placed in parallel to the first bus bar. The first magnetoelectric transducer is placed so as to be opposed to a side surface of the first bus bar. A sectional area of the first bus bar is smaller than a sectional area of the second bus bar in a first section. The first section is a section passing through the first magnetoelectric transducer and perpendicular to an extending direction of the first and second bus bars.
    Type: Application
    Filed: December 3, 2014
    Publication date: October 13, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Wataru NAKAYAMA, Kenji GOTO
  • Patent number: 7586219
    Abstract: The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal insulators for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: September 8, 2009
    Assignee: THK Co., Ltd.
    Inventors: Taro Miyamoto, Toshiyuki Aso, Shuhei Yamanaka, Wataru Nakayama
  • Patent number: 7556086
    Abstract: Device for enhancing cooling of electronic circuit components that is substantially or fully independent of orientation. A thin profile thermosyphon heat spreader mounted to an electronics package comprises a central evaporator in hydraulic communication with a peripheral condenser, both at least partially filled with liquid coolant. A very high effective thermal conductivity results. Performance is optimized by keeping the evaporator substantially full at all orientations while leaving a void for accumulation of vapor in the condenser. A cover plate and a parallel base plate of generally similar dimension form the evaporator and condenser. Optionally, an opening in the base plate is sealed against the electronics package and places the heat-dissipating component in direct contact with the liquid coolant. Alternatively, the base plate may be formed with the electronics package from a single piece of material. A boiling enhancement structure is provided in the evaporator to encourage vapor bubble nucleation.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: July 7, 2009
    Assignee: University of Maryland, College Park
    Inventors: Yogendra Joshi, Sunil S. Murthy, Wataru Nakayama
  • Publication number: 20080246349
    Abstract: The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal insulators for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 9, 2008
    Applicant: THK CO., LTD.
    Inventors: Taro Miyamoto, Toshiyuki Aso, Shuhei Yamanaka, Wataru Nakayama
  • Patent number: 7368837
    Abstract: The present invention provides a drive guide apparatus capable of ensuring an increased lifetime by preventing heat generated from a primary side of a linear motor from being transferred to a rail or a moving member of a guide mechanism to which the primary side of the linear motor is connected, thereby preventing variation of rolling resistance or sliding resistance of the guide mechanism. The drive guide apparatus has a linear motor and a guide mechanism that has a rail and a moving member provided to be movable relative to the rail. A primary side of the linear motor is connected to the rail. Thermal for blocking heat generated from the primary side of the linear motor are provided between the primary side and the rail of the guide mechanism to which the primary side is connected directly or indirectly.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: May 6, 2008
    Assignee: THK Co., Ltd.
    Inventors: Taro Miyamoto, Toshiyuki Aso, Shuhei Yamanaka, Wataru Nakayama