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).
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Patent number: 8471428Abstract: 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: GrantFiled: July 29, 2010Date of Patent: June 25, 2013Assignee: Hitachi, Ltd.Inventors: Takashi Naganawa, Kenji Miyata, Takashi Ishigami, Yoshihisa Ishikawa
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Publication number: 20130143981Abstract: 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: ApplicationFiled: August 26, 2010Publication date: June 6, 2013Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Kenji Miyata, Toshitaka Yamagata
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Patent number: 8449143Abstract: 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: GrantFiled: May 14, 2008Date of Patent: May 28, 2013Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Takeshi Miyakawa, Kenji Miyata, Taiki Nishi, Yoshihiko Okajima
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Publication number: 20130082564Abstract: 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: ApplicationFiled: May 31, 2010Publication date: April 4, 2013Applicant: HITACHI, LTD.Inventors: Yoshihisa Ishikawa, Kenji Miyata, Takayuki Koyama
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Patent number: 8407881Abstract: 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: GrantFiled: February 2, 2010Date of Patent: April 2, 2013Assignee: Hitachi, Ltd.Inventors: Takashi Naganawa, Kenji Miyata, Takashi Ishigami
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Patent number: 8334629Abstract: 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: GrantFiled: October 31, 2011Date of Patent: December 18, 2012Assignee: Hitachi, Ltd.Inventors: Kenji Miyata, Yoshihisa Ishikawa
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Patent number: 8246537Abstract: 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: GrantFiled: December 20, 2007Date of Patent: August 21, 2012Assignee: Olympus CorporationInventors: Noriyuki Fujimori, Masanori Ogata, Kenji Miyata
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Publication number: 20120188730Abstract: 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: ApplicationFiled: September 13, 2010Publication date: July 26, 2012Applicant: DENKI KAGAKU KOGYO KABUSHIKI KAISHAInventors: Kenji Miyata, Toshitaka Yamagata
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Patent number: 8175669Abstract: In an apparatus for measuring an oxygen saturation in blood, a plurality of light emitters irradiate a living tissue with a plurality of light beams having different wavelengths. A light receiver receives the light beams reflected from or transmitted through the living tissue to generate pulse wave signals in accordance with pulsations of the blood in the living tissue. A separator separates each of the pulse wave signals into a plurality of amplitude signals each of which is associated with one frequency, thereby generating pairs of amplitude signals each of which is associated with one of a plurality of frequencies. A first processor calculates a ratio between the amplitude signals in each of the pairs of the amplitude signals. A selector selects one of the pairs of the amplitude signals. A second processor calculates the oxygen saturation from the ratio of the selected pair of the amplitude signals.Type: GrantFiled: August 24, 2006Date of Patent: May 8, 2012Assignee: Nihon Kohden CorporationInventors: Naoki Kobayashi, Kenji Miyata, Masaru Yarita, Kazumasa Ito
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Publication number: 20120078559Abstract: In the fast steady state field analysis method, the following processes are executed in a computer. First, the physical quantity of the analysis object is calculated through transient analysis based on an analysis execution module in which a differential equation including the time-derivative term is made discrete. A time-averaged value of the calculated physical quantities of the analysis object that are present in a set time width is calculated. The physical quantity of the analysis object calculated in step 21 for each time step is corrected by using a time harmonic order correction equation for time averaging with the calculated time-averaged value taken into consideration. After the physical quantity became in the steady state, the physical quantity of the analysis object in the steady state is calculated through transient analysis in which a differential equation is used. The calculated physical quantity of the analysis object in the steady state is displayed.Type: ApplicationFiled: August 31, 2011Publication date: March 29, 2012Inventor: Kenji MIYATA
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Patent number: 8134269Abstract: 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: GrantFiled: February 28, 2011Date of Patent: March 13, 2012Assignee: Hitachi, Ltd.Inventors: Kenji Miyata, Yoshihisa Ishikawa
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Publication number: 20120043847Abstract: 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: ApplicationFiled: October 31, 2011Publication date: February 23, 2012Applicant: Hitachi, Ltd.Inventors: Kenji MIYATA, Yoshihisa Ishikawa
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Publication number: 20120038238Abstract: A vehicular AC generator includes: a rotor (1) with a plurality of magnetic poles (113), assuming a shape for suppressing bias magnetism, and disposed along a circumferential direction, which includes a field winding (12); a stator (2) disposed so as to leave a gap between the rotor (1) and the stator (2); and a semiconductor element that rectifies an AC current induced at a stator coil (105) wound at the stator (2) as power is supplied to the field winding (112) at the rotor (1) so as to convert the AC current to a DC current, wherein: the stator (2) is formed by laminating electromagnetic steel plates; and a resistance value of the stator coil (105) wound at the stator (2) is set to a value equal to or less than a predetermined value.Type: ApplicationFiled: March 11, 2009Publication date: February 16, 2012Applicant: Hitachi, Ltd.Inventors: Yoshihisa Ishikawa, Kenji Miyata, Takayuki Koyama, Masahiko Honma
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Publication number: 20110148241Abstract: 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: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Applicant: Hitachi, Ltd.Inventors: Kenji MIYATA, Yoshihisa ISHIKAWA
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Publication number: 20110144959Abstract: A fast analysis method of steady-state fields performs arithmetic processing over plural time steps, performs transient analysis on the basis of an equation having a time derivative term, obtains a physical quantity of an analysis object, and includes the steps of reading input data including a time average width necessary to perform time averaging on the physical quantity, a phase width of a fundamental wave corresponding to the time average width, or a time step width necessary to perform the time averaging, and finite element modeling data of the analysis object by the arithmetic device; obtaining a time-averaged physical quantity using the time average width, the phase width of the fundamental wave, or the time step width by the arithmetic device; and obtaining a steady-state field of the physical quantity through a correction of the physical quantity using the time average quantity by the arithmetic device.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Inventor: Kenji MIYATA
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Patent number: 7915778Abstract: An electric motor 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: GrantFiled: October 4, 2010Date of Patent: March 29, 2011Assignee: Hitachi, Ltd.Inventors: Kenji Miyata, Yoshihisa Ishikawa
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Publication number: 20110025162Abstract: A rotating electrical machine, includes; a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein; two stator magnetic poles are formed by winding coils in phase and by the stator core within 360° of electrical angle defined by the magnetic poles of the rotor; the coil turns that form respective stator magnetic poles have angular widths in circumferential direction of less than 180° of electrical angle; the coil turns 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: ApplicationFiled: July 29, 2010Publication date: February 3, 2011Applicant: Hitachi, Ltd.Inventors: Takashi NAGANAWA, Kenji MIYATA, Takashi ISHIGAMI, Yoshihisa ISHIKAWA
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Publication number: 20110018381Abstract: An electric motor 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: ApplicationFiled: October 4, 2010Publication date: January 27, 2011Applicant: Hitachi, Ltd.Inventors: Kenji Miyata, Yoshihisa Ishikawa
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Patent number: 7830060Abstract: An electric motor 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: GrantFiled: February 26, 2009Date of Patent: November 9, 2010Assignee: Hitachi, Ltd.Inventors: Kenji Miyata, Yoshihisa Ishikawa
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Patent number: D681608Type: GrantFiled: November 19, 2012Date of Patent: May 7, 2013Assignee: Panasonic CorporationInventors: Mitsuru Takami, Kenji Miyata