Patents by Inventor Kenji Miyata

Kenji Miyata 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).

  • Publication number: 20180188335
    Abstract: In a magnetic field analysis calculation, there is a need to consider a characteristic that a magnetic field and a flux density face in different directions from each other by a stress in a magnetic material. Therefore, a measured value of a magnetic characteristic on a condition that the magnetic field, the magnetic flux density, and a mechanical stress are parallel is used. In a method and a device for magnetic field analysis calculation, a stress magnetic anisotropy is calculated using a relation between a magnetostriction of the magnetic material, the magnetic flux density, and the stress and a relation between a magnetization curve of the magnetic material, the magnetic flux density, and the stress which are measured on a condition that the magnetic field and the stress in the magnetic material are parallel.
    Type: Application
    Filed: July 24, 2015
    Publication date: July 5, 2018
    Inventors: Kazutami TAGO, Kenji MIYATA, Tomohito NAKANO
  • Publication number: 20170315002
    Abstract: The present invention provides a method for calculating an electromagnetic force distribution with high accuracy. Electromagnetic force acting on an element is calculated by surface integral of force acting on each of the element interfaces. Moreover, an influence caused by a mesh is reduced by using an outward unit normal vector of each of the element interfaces, not using a shape function that is affected by the mesh.
    Type: Application
    Filed: November 14, 2014
    Publication date: November 2, 2017
    Applicant: Hitachi, Ltd..
    Inventors: Tomohito NAKANO, Kenji MIYATA
  • Patent number: 9497857
    Abstract: An object of the present invention is to provide an insulating sheet superior in heat dissipation efficiency, heat resistance, insulation efficiency and moldability. Provided is a sheet-shaped insulating sheet of a resin composition containing an epoxy resin, a curing agent and an inorganic filler, wherein one or both of the epoxy resin and the curing agent have a naphthalene structure, the inorganic filler contains hexagonal boron nitride, and the inorganic filler is contained in an amount of 70 to 85 vol % in the entire resin composition. It is possible to increase the filling efficiency of an inorganic filler in the insulating sheet by using an epoxy resin and/or a curing agent having a naphthalene structure, which are favorably compatible with the hexagonal boron nitride contained in the inorganic filler.
    Type: Grant
    Filed: September 13, 2010
    Date of Patent: November 15, 2016
    Assignee: Denka Company Limited
    Inventors: Kenji Miyata, Toshitaka Yamagata
  • Patent number: 8921458
    Abstract: To provide a resin composition having excellent thermal conductivity and excellent insulation reliability, a molded object, a substrate material, and a circuit board. [Solution] Provided is a resin composition which comprises an epoxy resin, a hardener, and an inorganic filler, wherein the epoxy resin and/or the hardener has a naphthalene structure, the inorganic filler comprises hexagonal boron nitride, and the inorganic filler accounts for 50-85 vol. % of the whole resin composition. Since a naphthalene structure, which imparts the satisfactory ability to wet the hexagonal boron nitride included in the inorganic filler, has been introduced into the epoxy resin and/or the hardener to heighten the inorganic-filler loading characteristics, this resin composition attains excellent heat dissipation properties, heat resistance, insulating properties, etc.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: December 30, 2014
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kenji Miyata, Toshitaka Yamagata
  • Patent number: 8829754
    Abstract: An alternator comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: September 9, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Miyata, Yoshihisa Ishikawa
  • Publication number: 20140100422
    Abstract: An in-vivo information acquisition system is an in-vivo information acquisition system including an in-vivo information acquisition apparatus provided with a configuration capable of transmitting a wireless signal which includes in-vivo information about an inside of a subject, and a terminal apparatus provided with a configuration capable of receiving the wireless signal transmitted from the in-vivo information acquisition apparatus outside the subject, wherein the terminal apparatus includes a reception confirmation signal transmission section generating and transmitting a reception confirmation signal when the wireless signal which includes the in-vivo information about the subject can be received; and the in-vivo information acquisition apparatus includes a storage section, and a control section causing the wireless signal which includes the in-vivo information about the subject to be transmitted and at the same time, causing the same in-vivo information as included in the transmitted wireless signal to b
    Type: Application
    Filed: December 16, 2013
    Publication date: April 10, 2014
    Applicant: OLYMPUS CORPORATION
    Inventors: Hideharu MIYAHARA, Kenji MIYATA
  • Publication number: 20130187515
    Abstract: A vehicular alternating current generator includes a Lundell rotor and a stator. The Lundell rotor includes a cylindrical portion around which a field coil is wound; plate-shaped first and second end plate portions disposed on both end faces in an axial direction of the cylindrical portion so as to face each other; a plurality of first claw portions extending in parallel with a rotational axis in a direction from the first end plate portion to the second end plate portion; and second claw portions extending in parallel with the rotational axis in a direction from the second end plate portion to the first end plate portion, the second claw portions being disposed circumferentially and alternately relative to the first claw portions. The stator is disposed on an outer periphery of the rotor so as to face the rotor with a small rotational air gap there between.
    Type: Application
    Filed: March 31, 2010
    Publication date: July 25, 2013
    Applicant: Hitachi Ltd.
    Inventors: Kenji Miyata, Takayuki Koyama, Maki Ishikawa
  • Patent number: 8471428
    Abstract: A rotating electrical machine includes a rotor, in which a plurality of magnetic poles are provided in circumferential direction, and a stator, within which the rotor is disposed. In the stator, two stator magnetic poles are formed by winding coils of one phase and by a stator core of the stator within 360° of electrical angle defined by the magnetic poles of the rotor. The coils that form respective stator magnetic poles have angular widths in circumferential direction of less than 180° of electrical angle, the coils that form the respective two stator magnetic poles are provided so as not to mutually overlap and are wound so that adjacent ones of the stator magnetic poles have mutually opposite polarities, and, in the stator, each winding of each coil consists of an external bridge wire, a turn portion, an internal bridge wire, and a turn portion, in that order.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: June 25, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Naganawa, Kenji Miyata, Takashi Ishigami, Yoshihisa Ishikawa
  • Publication number: 20130143981
    Abstract: To provide a resin composition having excellent thermal conductivity and excellent insulation reliability, a molded object, a substrate material, and a circuit board. [Solution] Provided is a resin composition which comprises an epoxy resin, a hardener, and an inorganic filler, wherein the epoxy resin and/or the hardener has a naphthalene structure, the inorganic filler comprises hexagonal boron nitride, and the inorganic filler accounts for 50-85 vol. % of the whole resin composition. Since a naphthalene structure, which imparts the satisfactory ability to wet the hexagonal boron nitride included in the inorganic filler, has been introduced into the epoxy resin and/or the hardener to heighten the inorganic-filler loading characteristics, this resin composition attains excellent heat dissipation properties, heat resistance, insulating properties, etc.
    Type: Application
    Filed: August 26, 2010
    Publication date: June 6, 2013
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Kenji Miyata, Toshitaka Yamagata
  • Patent number: 8449143
    Abstract: Provided is a metal base circuit board having a new function of a light reflection in addition to the conventional printed circuit board function for mounting electronic parts. The metal base circuit board has a circuit arranged on a metal plate via an insulation layer. A white film is arranged at least one the insulation layer.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: May 28, 2013
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takeshi Miyakawa, Kenji Miyata, Taiki Nishi, Yoshihiko Okajima
  • Publication number: 20130082564
    Abstract: An alternator for a vehicle includes: a rundel-type rotor including a cylindrical portion around which a field coil is wound, a pair of plate-shaped end plate portions which are arranged such that the end plate portions face both end surfaces of the cylindrical portion in the axial direction in an opposed manner, first claw portions which extend parallel to a rotary axis from one end plate portion, and second claw portions which extend parallel to the rotary axis from the other end plate portion, and a stator which is arranged on an outer peripheral side of the rotor with a rotary gap therebetween so as to face the rotor in an opposed manner, and has a laminated core on which an armature coil is wound. The between claw magnetic poles of the first and second claw portions is set to a optimum gap range to maximize output current.
    Type: Application
    Filed: May 31, 2010
    Publication date: April 4, 2013
    Applicant: HITACHI, LTD.
    Inventors: Yoshihisa Ishikawa, Kenji Miyata, Takayuki Koyama
  • Patent number: 8407881
    Abstract: An object of the present invention is to provide a small, high-power rotating electrical machine by suitably forming a distributed winding coil such that two stator magnetic poles each formed of in-phase coil turns are arranged within an electric angle of 360 degrees formed by magnetic poles of the rotor. The present invention provides a method for manufacturing a stator, the method including a first step of placing a distributed winding coil 207 composed of a wire wound around a reel 210, as a whole, inside a stator core 202, and a second step of moving an insertion blade 213 so as to spread the distributed winding coil 207 in the radial direction of the stator core 202, thus inserting the distributed winding coil 207 into a stator core slot 206.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: April 2, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Naganawa, Kenji Miyata, Takashi Ishigami
  • Patent number: 8334629
    Abstract: An alternator comprising a rotor having plural magnetic poles in the circumferential direction; and a stator whose teeth are disposed opposite to the periphery of the rotor, with an air gap interposed between the rotor and the stator, wherein the coil conductors are wound on the stator so that two stator magnetic poles may be formed by two coil units of a phase wound around stator teeth within the range of 360 electrical degrees subtended by the magnetic poles of the rotor; each of the two coil units forming the stator magnetic poles spans an electrical angle less than 180 electrical degrees; the two coil turns forming the two stator magnetic poles are laid out so that they may not overlap each other; and the coil conductors are so wound that the adjacent stator magnetic poles exhibit opposite magnetic polarities.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: December 18, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Miyata, Yoshihisa Ishikawa
  • Patent number: 8246537
    Abstract: According to the present invention, a capsular endoscope having at least an image pickup optical system, an illumination unit, an image pickup portion, and a circuit board comprises a marker shooting unit that indwells a marker member in a body cavity. Consequently, a predetermined marker is indwelled in a desired region such as a lesion discovered using the capsular endoscope so that the region can be readily rediscovered during reexamination.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: August 21, 2012
    Assignee: Olympus Corporation
    Inventors: Noriyuki Fujimori, Masanori Ogata, Kenji Miyata
  • Publication number: 20120188730
    Abstract: An object of the present invention is to provide an insulating sheet superior in heat dissipation efficiency, heat resistance, insulation efficiency and moldability. Provided is a sheet-shaped insulating sheet of a resin composition containing an epoxy resin, a curing agent and an inorganic filler, wherein one or both of the epoxy resin and the curing agent have a naphthalene structure, the inorganic filler contains hexagonal boron nitride, and the inorganic filler is contained in an amount of 70 to 85 vol % in the entire resin composition. It is possible to increase the filling efficiency of an inorganic filler in the insulating sheet by using an epoxy resin and/or a curing agent having a naphthalene structure, which are favorably compatible with the hexagonal boron nitride contained in the inorganic filler.
    Type: Application
    Filed: September 13, 2010
    Publication date: July 26, 2012
    Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHA
    Inventors: Kenji Miyata, Toshitaka Yamagata
  • Patent number: D681608
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: May 7, 2013
    Assignee: Panasonic Corporation
    Inventors: Mitsuru Takami, Kenji Miyata
  • Patent number: D706850
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: June 10, 2014
    Assignee: Panasonic Corporation
    Inventors: Mitsuru Takami, Kenji Miyata
  • Patent number: D729774
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: May 19, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Katsuyoshi Uchiyama, Takashi Inoue, Kenji Miyata
  • Patent number: D744021
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: November 24, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Kenji Miyata
  • Patent number: D775607
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: January 3, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Katsuyoshi Uchiyama, Takashi Inoue, Kenji Miyata