Patents by Inventor Takeshi Araki
Takeshi Araki 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: 10679779Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).Type: GrantFiled: February 21, 2017Date of Patent: June 9, 2020Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Araki, Hirotaka Ishii, Nao Kobayashi
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Publication number: 20200027634Abstract: According to an embodiment, a superconductor includes a base member, and a superconducting layer provided on the base member. The superconducting layer has a first surface on the base member side, and a second surface on the side opposite to the first surface. The lattice constant of the base member substantially matches the lattice constant of the superconducting layer. The superconducting layer includes REA1-xREBxBa2Cu3O7-z. The x is not less than 0.01 and not more than 0.40. The z is not less than 0.02 and not more than 0.20. The REA includes at least one of Y, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu. The REB includes at least one of Nd or Sm. The superconducting layer includes a first surface-side region including a portion of the first surface. The first surface-side region includes a first region having an orientation property, and a second region.Type: ApplicationFiled: June 18, 2019Publication date: January 23, 2020Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi ARAKI, Hiroyuki FUKE
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Patent number: 10541073Abstract: A superconducting coil of an embodiment includes a superconducting wire including an oxide superconductor layer. The oxide superconductor layer has a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).Type: GrantFiled: March 1, 2017Date of Patent: January 21, 2020Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Araki, Kenji Tasaki, Hirotaka Ishii
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Patent number: 10410781Abstract: According to an embodiment, a superconductor includes a base member, and a superconducting layer provided on the base member. The superconducting Layer has a first surface on the base member side, and a second surface on the side opposite to the first surface. The lattice constant of the base member substantially matches the lattice constant of the superconducting layer. The superconducting layer includes REA1-xREBxBa2Cu3O7-z. The x is not less than 0.01 and not more than 0.40. The z is not less than 0.02 and not more than 0.20. The REA includes at least one of Y, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu. The REB includes at least one of Nd or Sm. The superconducting layer includes a first surface-side region including a portion of the first surface. The first surface-side region includes a first region having an orientation property, and a second region.Type: GrantFiled: January 31, 2017Date of Patent: September 10, 2019Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Araki, Hiroyuki Fuke
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Patent number: 10110150Abstract: A primary magnetic flux command value is changed in accordance with a torque of a rotary electric motor to control a current phase of an armature current with respect to a q axis that advances by ?/2 with respect to a d axis in phase with a field flux to be a desired phase in accordance with the torque.Type: GrantFiled: October 8, 2013Date of Patent: October 23, 2018Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takeshi Araki, Naoto Kobayashi, Nobuki Kitano
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Publication number: 20180197659Abstract: An oxide superconductor according to an embodiment includes an oxide superconducting layer includes a single crystal having a continuous perovskite structure containing at least one rare earth element selected from the group consisting of yttrium, lanthanum, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium, barium, and copper, containing praseodymium is a part of the site of the rare earth element in the perovskite structure, and having a molar ratio of praseodymium of 0.00000001 or more and 0.2 or less with respect to the sum of the at least one rare earth element and praseodymium; fluorine in an amount of 2.0×1015 atoms/cc or more and 5.0×1019 atoms/cc or less; and carbon in an amount of 1.0×1017 atoms/cc or more and 5.0×1020 atoms/cc or less.Type: ApplicationFiled: February 2, 2018Publication date: July 12, 2018Inventors: Mariko HAYASHI, Takeshi ARAKI, Hiroyuki FUKE, Nao KOBAYASHI
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Patent number: 9944254Abstract: A support structure for a front wiper device for a vehicle having an annular pivot cap which surrounds, under a deck garnish, a periphery of a pivot on which a base end portion of a wiper arm is supported is provided. The pivot cap includes a bottom plate section that is in an annular shape surrounding the periphery of the pivot, and is extended to a vehicle front side, and a flange section extending upward from an edge portion of the bottom plate section. The flange section is opened at a vehicle front side, and is provided with an opening. In a region at a vehicle rear side and at an electric motor side, of the bottom plate section, a protrusion that protrudes upward from a region at a side opposite to the electric motor is included.Type: GrantFiled: March 21, 2013Date of Patent: April 17, 2018Assignees: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA, MITSUBISHI JIDOSHA ENGINEERING KABUSHIKI KAISHAInventors: Tatsuya Akashi, Hiroshi Amano, Ryota Yasui, Takeshi Araki, Satoru Hara, Tomoaki Nishiyama, Takanobu Toritani
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Publication number: 20180061541Abstract: A superconducting coil of an embodiment includes a superconducting wire including an oxide superconductor layer. The oxide superconductor layer has a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).Type: ApplicationFiled: March 1, 2017Publication date: March 1, 2018Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi ARAKI, Kenji Tasaki, Hirotaka Ishii
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Publication number: 20180061537Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure including rare earth elements, barium (Ba), and copper (Cu). The rare earth elements include a first element which is praseodymium, at least one second element selected from the group consisting of neodymium, samarium, europium, and gadolinium, at least one third element selected from the group consisting of yttrium, terbium, dysprosium, and holmium, and at least one fourth element selected from the group consisting of erbium, thulium, ytterbium, and lutetium. When the number of atoms of the first element is N(PA), the number of atoms of the second element is N(SA), and the number of atoms of the fourth element is N(CA), 1.5×(N(PA)+N(SA))?N(CA) or 2×(N(CA)?N(PA))?N(SA) is satisfied.Type: ApplicationFiled: March 1, 2017Publication date: March 1, 2018Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi Araki, Hirotaka Ishii, Nao Kobayashi
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Publication number: 20180047487Abstract: An oxide superconductor of an embodiment includes an oxide superconductor layer having a continuous Perovskite structure containing rare earth elements, barium (Ba), and copper (Cu). The rare earth elements contain a first element which is praseodymium (Pr), at least one second element selected from the group consisting of neodymium (Nd), samarium (Sm), europium (Eu), and gadolinium (Gd), at least one third element selected from the group consisting of yttrium (Y), terbium (Tb), dysprosium (Dy), and holmium (Ho), and at least one fourth element selected from the group consisting of erbium (Er), thulium (Tm), ytterbium (Yb), and lutetium (Lu).Type: ApplicationFiled: February 21, 2017Publication date: February 15, 2018Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi ARAKI, Hirotaka ISHII, Nao KOBAYASHI
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Publication number: 20180012689Abstract: According to an embodiment, a superconductor includes a base member, and a superconducting layer provided on the base member. The superconducting Layer has a first surface on the base member side, and a second surface on the side opposite to the first surface. The lattice constant of the base member substantially matches the lattice constant of the superconducting layer. The superconducting layer includes REA1-xREBxBa2Cu3O7-z. The x is not less than 0.01 and not more than 0.40. The z is not less than 0.02 and not more than 0.20. The REA includes at least one of Y, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu. The REB includes at least one of Nd or Sm. The superconducting layer includes a first surface-side region including a portion of the first surface. The first surface-side region includes a first region having an orientation property, and a second region.Type: ApplicationFiled: January 31, 2017Publication date: January 11, 2018Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi ARAKI, Hiroyuki FUKE
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Publication number: 20170309805Abstract: An oxide superconductor includes: REBa2Cu3O7-x (RE being one element selected from a “RE element group” of Pr, Nd, Sm, Eu, Gd, Y, Tb, Dy, Ho, Er, Tm, Yb, and Lu). The RE includes at least three, types of metallic elements (M1, M2, and M3), and the three types of metallic elements are any element of the RE element group selected in order. In an oxide system satisfying R(1)?20 mol % and R(M2)?60 mol % and R(M3)?20 mol %, R(M1) being an average metallic element ratio of M1 in M1+M2+M3, SD(Ms)>0.15 is satisfied at a position at 50% of an average film thickness of a cross section including the c-axis, Ms being the metallic element of not larger of R(M1) and R(M3), SD(Ms) being a standard deviation/average value of a concentration of Ms.Type: ApplicationFiled: July 11, 2017Publication date: October 26, 2017Applicant: Kabushiki Kaisha ToshibaInventors: Takeshi ARAKI, Mariko Hayashi, Hiroyuki Fuke
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Patent number: 9536855Abstract: A semiconductor device includes, an alloy layer sandwiched between a first Ag layer formed on a mounting board or circuit board and a second Ag layer formed on a semiconductor element, wherein the alloy layer contains an intermetallic compound of Ag3Sn formed by Ag components of the first Ag layer and the second Ag layer and Sn, and wherein a plurality of wires containing Ag are arranged extended from an outside-facing periphery of the alloy layer.Type: GrantFiled: March 27, 2014Date of Patent: January 3, 2017Assignee: Mitsubishi Electric CorporationInventors: Koji Yamazaki, Takeshi Araki
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Patent number: 9479100Abstract: An electric motor controller includes a first coordinate conversion unit that converts a three-phase current into a current in a ?c-?c rotating coordinate system, a first calculation unit that obtains a first term, a second calculation unit that obtains a voltage command value in the ?c-?c rotating coordinate system as a sum of the first term and a second term, a second coordinate conversion unit that coordinate-converts the voltage command value into a voltage command value of a voltage to be applied to a rotary electric motor in another coordinate system.Type: GrantFiled: July 11, 2013Date of Patent: October 25, 2016Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takeshi Araki, Naoto Kobayashi, Nobuki Kitano
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Publication number: 20160035691Abstract: A semiconductor device includes, an alloy layer sandwiched between a first Ag layer formed on a mounting board or circuit board and a second Ag layer formed on a semiconductor element, wherein the alloy layer contains an intermetallic compound of Ag3Sn formed by Ag components of the first Ag layer and the second Ag layer and Sn, and wherein a plurality of wires containing Ag are arranged extended from an outside-facing periphery of the alloy layer.Type: ApplicationFiled: March 27, 2014Publication date: February 4, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Koji YAMAZAKI, Takeshi ARAKI
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Patent number: 9224665Abstract: A semiconductor device includes a circuit substrate which is configured with an insulative substrate formed of a ceramic material and provided on its one surface with an electrode formed of a copper material, and a power semiconductor element bonded with the electrode using a sinterable silver-particle bonding material, wherein the electrode has a Vickers hardness of 70 HV or more in its portion from the bonding face with the power semiconductor element toward the insulative substrate to a depth of 50 ?m, and has a Vickers hardness of 50 HV or less in its portion at the side toward the insulative substrate.Type: GrantFiled: July 6, 2012Date of Patent: December 29, 2015Assignee: Mitsubishi Electric CorporationInventors: Kenji Ohtsu, Yoshiji Ohtsu, Taku Kusunoki, Takeshi Araki, Hiroaki Tatsumi
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Publication number: 20150311846Abstract: A primary magnetic flux command value is changed in accordance with a torque of a rotary electric motor to control a current phase of an armature current with respect to a q axis that advances by ?/2 with respect to a d axis in phase with a field flux to be a desired phase in accordance with the torque.Type: ApplicationFiled: October 8, 2013Publication date: October 29, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takeshi ARAKI, Naoto KOBAYASHI, Nobuki KITANO
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Publication number: 20150229258Abstract: An electric motor controller includes a first coordinate conversion unit that converts a three-phase current into a current in a ?c-?c rotating coordinate system, a first calculation unit that obtains a first term, a second calculation unit that obtains a voltage command value in the ?c-?c rotating coordinate system as a sum of the first term and a second term, a second coordinate conversion unit that coordinate-converts the voltage command value into a voltage command value of a voltage to be applied to a rotary electric motor in another coordinate system.Type: ApplicationFiled: July 11, 2013Publication date: August 13, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takeshi Araki, Naoto Kobayashi, Nobuki Kitano
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Publication number: 20150135461Abstract: A support structure for a front wiper device for a vehicle having an annular pivot cap which surrounds, under a deck garnish, a periphery of a pivot on which a base end portion of a wiper arm is supported is provided. The pivot cap includes a bottom plate section that is in an annular shape surrounding the periphery of the pivot, and is extended to a vehicle front side, and a flange section extending upward from an edge portion of the bottom plate section. The flange section is opened at a vehicle front side, and is provided with an opening. In a region at a vehicle rear side and at an electric motor side, of the bottom plate section, a protrusion that protrudes upward from a region at a side opposite to the electric motor is included.Type: ApplicationFiled: March 21, 2013Publication date: May 21, 2015Applicants: MITSUBISHI JIDOSHA ENGINEERING KABUSHIKI KAISHA, MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHAInventors: Tatsuya Akashi, Hiroshi Amano, Ryota Yasui, Takeshi Araki, Satoru Hara, Tomoaki Nishiyama, Takanobu Toritani
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Patent number: 9023764Abstract: According to one embodiment, an oxide superconductor includes an oriented superconductor layer and an oxide layer. The oriented superconductor layer contains fluorine at 2.0×1016-5.0×1019 atoms/cc and carbon at 1.0×1018-5.0×1020 atoms/cc. The superconductor layer contains in 90% or more a portion oriented along c-axis with an in-plane orientation degree (??) of 10 degrees or less, and contains a LnBa2Cu3O7-x superconductor material (Ln being yttrium or a lanthanoid except cerium, praseodymium, promethium, and lutetium). The oxide layer is provided in contact with a lower surface of the superconductor layer and oriented with an in-plane orientation degree (??) of 10 degrees or less with respect to one crystal axis of the superconductor layer. Area of a portion of the lower surface of the superconductor layer in contact with the oxide layer is 0.3 or less of area of a region directly below the superconductor layer.Type: GrantFiled: February 14, 2013Date of Patent: May 5, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Takeshi Araki, Mariko Hayashi, Ko Yamada, Hiroyuki Fuke