Patents by Inventor Tomohiro Tabata

Tomohiro Tabata 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: 20250215541
    Abstract: A soft magnetic iron alloy sheet having higher Bs and lower Pi than an electromagnetic pure iron sheet is capable of further reducing the cost as compared to Permendur. A method of manufacturing the soft magnetic iron alloy sheet, and an iron core and a rotating electric machine including the soft magnetic iron alloy sheet are provided. The soft magnetic iron alloy sheet includes 1 to 30 at % of Co, 0.5 to 10 at % of N, 0 to 1.2 at % of V, and a remainder consisting of Fe and impurities. The soft magnetic iron alloy sheet includes ferrite phase as a primary phase and iron nitride phase having a tetragonal structure. A tensile strain is generated in a range of 10% or more and 110% or less of a tensile elastic limit strain along an in-plane direction of the soft magnetic iron alloy sheet.
    Type: Application
    Filed: February 8, 2023
    Publication date: July 3, 2025
    Inventors: Tomohiro TABATA, Shohei TERADA, Yusuke ASARI, Matahiro KOMURO
  • Publication number: 20250055329
    Abstract: Provided are a laminated iron core that can reduce excessive increase in an iron loss while exhibiting saturation magnetic flux density higher than that of an electromagnetic pure iron plate, and can be made at lower cost than permendur, and a rotating electric machine using the laminated iron core. A laminated iron core according to the present invention is a laminated iron core in which a plurality of types of soft magnetic iron plates are laminated. The plurality of types of the soft magnetic iron plates include a first soft magnetic iron plate and a second soft magnetic iron plate, the first soft magnetic iron plate and the second soft magnetic iron plate are alternately laminated, the first soft magnetic iron plate has higher nitrogen content and higher saturation magnetic flux density than the second soft magnetic iron plate, and the second soft magnetic iron plate has lower coercive force than the first soft magnetic iron plate.
    Type: Application
    Filed: November 14, 2022
    Publication date: February 13, 2025
    Inventors: Matahiro KOMURO, Tomohiro TABATA, Yusuke ASARI, Shohei TERADA
  • Publication number: 20250037911
    Abstract: Provided are a soft magnetic iron alloy plate that can suppress an excessive increase in Pi while exhibiting Bs higher than that of an electromagnetic pure iron plate and reduce the cost as compared with permendur, an iron core using the soft magnetic iron alloy plate, and a rotating electric machine. The soft magnetic iron alloy plate according to the present invention includes a chemical composition containing Co by 1 to 30 atom %, N by 0.2 to 10 atom %, an M component that can form an MN-type nitride by 0.5 to 5 atom %, with the balance being Fe and impurities, and when a cross section of the soft magnetic iron alloy plate is observed, nitride particles of the M component are deposited with an average particle size of 0.5 ?m or less and a number density of 50 particles/100 ?m2 or less.
    Type: Application
    Filed: November 18, 2022
    Publication date: January 30, 2025
    Inventors: Tomohiro TABATA, Matahiro KOMURO, Yusuke ASARI, Shohei TERADA
  • Publication number: 20240233993
    Abstract: A soft magnetic iron alloy sheet has a saturation magnetic flux density comparable to that of Permendur, with the same iron loss as electromagnetic pure iron, and a lower cost than Permendur. The soft magnetic iron alloy sheet includes, as a chemical composition, 30 at % or less of Co, 0.1 at % or more and 11 at % or less of N, and 1.2 at % or less of vanadium, with the remainder being Fe and impurities. In a thickness direction of the soft magnetic iron alloy sheet, a surface layer region has an average nitrogen concentration of 1 at % or more and 15 at % or less and an internal region has a lower average nitrogen concentration than the surface layer region. In the surface layer region, a thickness is 1% or more and 30% or less from both main surfaces of the sheet and iron-nitride martensite having a tetragonal structure is formed.
    Type: Application
    Filed: September 28, 2021
    Publication date: July 11, 2024
    Inventors: Tomohiro TABATA, Matahiro KOMURO, Yusuke ASARI, Shinya TAMURA, Shohei TERADA
  • Publication number: 20240194383
    Abstract: A soft magnetic iron alloy plate having saturation magnetic flux density higher than that of an electromagnetic pure iron plate without an excessive increase in an iron loss, a method for manufacturing the soft magnetic iron alloy plate, and an iron core and a rotating electric machine using the soft magnetic iron alloy plate are provided. A soft magnetic iron alloy plate according to the present invention includes chemical composition containing 2 to 10 at. % of N, 0 to 30 at. % of Co, 0 to 1.2 at. % of V, and a remaining portion including Fe and impurities, and in a thickness direction of the soft magnetic iron alloy plate, an outer nitrogen concentration transition region where N concentration on a main surface is 1 to 4 at. % and N concentration increases toward the inner side from the main surface, a high nitrogen concentration region where maximum N concentration is higher than N concentration of the main surface and less than 11 at. %, and a variation range of N concentration is within 1 at.
    Type: Application
    Filed: February 18, 2022
    Publication date: June 13, 2024
    Inventors: Matahiro KOMURO, Tomohiro TABATA, Shinya TAMURA, Yusuke ASARI, Shohei TERADA
  • Publication number: 20240186841
    Abstract: A magnetic material includes body-centered tetragonal (bct) crystal including iron and nitrogen, in which a molar ratio of iron to nitrogen in the crystal exceeds 8. An iron core includes soft magnetic steel sheets stacked together, in which a part or the entirety of the soft magnetic steel sheets is formed of the magnetic material which includes body-centered tetragonal (bct) crystal including iron and nitrogen and has a molar ratio of iron to nitrogen in the crystal exceeds 8. A rotating electric machine includes an iron core including soft magnetic steel sheets stacked together, in which a part or the entirety of the soft magnetic steel sheets is formed of the magnetic material which includes body-centered tetragonal (bct) crystal including iron and nitrogen and has a molar ratio of iron to nitrogen in the crystal exceeds 8.
    Type: Application
    Filed: April 5, 2022
    Publication date: June 6, 2024
    Inventors: Yusuke ASARI, Tomohiro TABATA, Shinya TAMURA, Matahiro KOMURO, Shohei TERADA
  • Publication number: 20240136096
    Abstract: A soft magnetic iron alloy sheet has a saturation magnetic flux density comparable to that of Permendur, with the same iron loss as electromagnetic pure iron, and a lower cost than Permendur. The soft magnetic iron alloy sheet includes, as a chemical composition, 30 at % or less of Co, 0.1 at % or more and 11 at % or less of N, and 1.2 at % or less of vanadium, with the remainder being Fe and impurities. In a thickness direction of the soft magnetic iron alloy sheet, a surface layer region has an average nitrogen concentration of 1 at % or more and 15 at % or less and an internal region has a lower average nitrogen concentration than the surface layer region. In the surface layer region, a thickness is 1% or more and 30% or less from both main surfaces of the sheet and iron-nitride martensite having a tetragonal structure is formed.
    Type: Application
    Filed: September 27, 2021
    Publication date: April 25, 2024
    Inventors: Tomohiro TABATA, Matahiro KOMURO, Yusuke ASARI, Shinya TAMURA, Shohei TERADA
  • Publication number: 20230290551
    Abstract: The present invention provides a soft magnetic iron sheet exhibiting a high saturation magnetic flux density and a low iron loss as compared with an electromagnetic pure iron sheet, a method for producing the soft magnetic iron sheet, and, an iron core and a dynamo-electric machine, each using the soft magnetic iron sheet. The soft magnetic iron sheet according to the present invention includes: iron as a main component; and nitrogen, in which the soft magnetic iron sheet includes, along a thickness direction of the soft magnetic iron sheet: a high nitrogen concentration layer having a nitrogen concentration of 2 at. % to 11 at.
    Type: Application
    Filed: May 11, 2021
    Publication date: September 14, 2023
    Inventors: Matahiro KOMURO, Yusuke ASARI, Kazuya SHINAGAWA, Shinya TAMURA, Tomohiro TABATA, Shohei TERADA
  • Patent number: 8627672
    Abstract: In a wall-hung air conditioner 1 provided with a vertical blade 85 for wind-direction change, a flap 60, and a fan guard 70 at an outlet 13 of a housing containing a heat exchanger 2 and a blower, the fan guard 70 is provided with a plurality of wires 71 extending in the longitudinal direction of the outlet 13 and a pair of supporting bodies 72 and 73 bundling the both ends of the wires 71, and the fan guard 70 is installed with the plurality of wires 71 extended into a space between the vertical blade 85 and the flap 60 and the pair of the supporting bodies 72 and 73 are fixed and mounted onto the outlet 13 through one-touch operation.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: January 14, 2014
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Yasuhiro Moteki, Yasunori Ohama, Mayumi Saito, Tomohiro Tabata
  • Publication number: 20110048050
    Abstract: In a wall-hung air conditioner 1 provided with a vertical blade 85 for wind-direction change, a flap 60, and a fan guard 70 at an outlet 13 of a housing containing a heat exchanger 2 and a blower, the fan guard 70 is provided with a plurality of wires 71 extending in the longitudinal direction of the outlet 13 and a pair of supporting bodies 72 and 73 bundling the both ends of the wires 71, and the fan guard 70 is installed with the plurality of wires 71 extended into a space between the vertical blade 85 and the flap 60 and the pair of the supporting bodies 72 and 73 are fixed and mounted onto the outlet 13 through one-touch operation.
    Type: Application
    Filed: August 20, 2010
    Publication date: March 3, 2011
    Inventors: Yasuhiro Moteki, Yasunori Ohama, Mayumi Saito, Tomohiro Tabata