Patents by Inventor Kiyotaka ONODERA
Kiyotaka ONODERA 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: 11352677Abstract: A method for producing a soft magnetic material having both high saturation magnetization and low coercive force, including: preparing an alloy having a composition represented by Compositional Formula 1 or 2 and having an amorphous phase, and heating the alloy at a rate of temperature rise of 10° C./sec or more and holding for 0 to 80 seconds at a temperature equal to or higher than the crystallization starting temperature and lower than the temperature at which Fe—B compounds start to form wherein, Compositional Formula 1 is Fe100-x-yBxMy, M represents at least one element selected from Nb, Mo, Ta, W, Ni, Co and Sn, and x and y are in atomic percent (at %) and satisfy the relational expressions of 10?x?16 and 0?y?8, and Compositional Formula 2 is Fe100-a-b-cBaCubM?c, M? represents at least one element selected from Nb, Mo, Ta, W, Ni and Co, and a, b and c are in atomic percent (at %) and satisfy the relational expressions 10?a?16, 0<b?2 and 0?c?8.Type: GrantFiled: August 2, 2017Date of Patent: June 7, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kiyotaka Onodera, Kiyonori Suzuki, Richard Parsons, Bowen Zang
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Patent number: 11078561Abstract: There are provided a soft magnetic material having a high saturation magnetization and a low coercive force and excellent in thermal endurance, and a method for producing the same. The present disclosure relates to a soft magnetic material represented by the following composition formula: Fe100-x-yBxNiy, wherein x satisfies 10?x?16 in at %, and y satisfies 0<y?4 in at %, having a coercive force of 20 A/m or less, and having a coercive force characteristic decrease rate after a thermal endurance test {[(coercive force after thermal endurance test?coercive force before thermal endurance test)/coercive force before thermal endurance test]×100 (%)} of 20% or less, wherein the thermal endurance test is carried out by allowing the soft magnetic material to stand in a constant temperature oven at 170° C. in the air for 100 h, and a method for producing the same.Type: GrantFiled: May 21, 2019Date of Patent: August 3, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kiyotaka Onodera, Hidefumi Kishimoto
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Patent number: 10825592Abstract: It is an object of the present disclosure to produce a soft magnetic material having high saturation magnetization by heat-treating a Fe-based amorphous alloy, without needing the control of the atmosphere. The present disclosure provides a method for producing a soft magnetic material, including heat treating a Fe-based amorphous alloy in a state in which the alloy is wrapped with a sheet comprising one or more substances having a standard Gibbs energy of formation of an oxide thereof that is larger in a negative direction than Fe, to form a crystal phase.Type: GrantFiled: November 13, 2018Date of Patent: November 3, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kiyotaka Onodera
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Publication number: 20190368019Abstract: There are provided a soft magnetic material having a high saturation magnetization and a low coercive force and excellent in thermal endurance, and a method for producing the same. The present disclosure relates to a soft magnetic material represented by the following composition formula: Fe100-x-yBxNiy, wherein x satisfies 10?x?16 in at %, and y satisfies 0<y?4 in at %, having a coercive force of 20 A/m or less, and having a coercive force characteristic decrease rate after a thermal endurance test {[(coercive force after thermal endurance test?coercive force before thermal endurance test)/coercive force before thermal endurance test]×100 (%)} of 20% or less, wherein the thermal endurance test is carried out by allowing the soft magnetic material to stand in a constant temperature oven at 170° C. in the air for 100 h, and a method for producing the same.Type: ApplicationFiled: May 21, 2019Publication date: December 5, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kiyotaka ONODERA, Hidefumi KISHIMOTO
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Publication number: 20190185950Abstract: A method for producing a soft magnetic material having both high saturation magnetization and low coercive force, including: preparing an alloy having a composition represented by Compositional Formula 1 or 2 and having an amorphous phase, and heating the alloy at a rate of temperature rise of 10° C./sec or more and holding for 0 to 80 seconds at a temperature equal to or higher than the crystallization starting temperature and lower than the temperature at which Fe—B compounds start to form wherein, Compositional Formula 1 is Fe100-x-yBxMy, M represents at least one element selected from Nb, Mo, Ta, W, Ni, Co and Sn, and x and y are in atomic percent (at %) and satisfy the relational expressions of 10?x?16 and 0?y?8, and Compositional Formula 2 is Fe100-a-b-cBaCubM?c, M? represents at least one element selected from Nb, Mo, Ta, W, Ni and Co, and a, b and c are in atomic percent (at %) and satisfy the relational expressions 10?a?16, 0<b?2 and 0?c?8.Type: ApplicationFiled: August 2, 2017Publication date: June 20, 2019Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, MONASH UNIVERSITYInventors: Kiyotaka ONODERA, Kiyonori SUZUKI, Richard PARSONS, Bowen ZANG
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Publication number: 20190181731Abstract: An object of the present disclosure is to provide a production method for a stator in which a breakage of the stator core can be prevented when coils are mounted thereon. The present embodiment is a production method for a stator that includes a stator core having a tooth and includes a coil wound around the tooth. The method includes: a step of preparing a stacked body which has the tooth and in which a plurality of plate-like soft magnetic materials each including an amorphous structure are stacked; a step of mounting the coil on the tooth; and a step of, after the coil is mounted, heating the stacked body to a temperature equal to or higher than a crystallization temperature of the soft magnetic materials.Type: ApplicationFiled: November 20, 2018Publication date: June 13, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Fumitaka YOSHINAGA, Kazuaki HAGA, Kensuke KOMORI, Kiyotaka ONODERA
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Publication number: 20190172617Abstract: It is an object of the present disclosure to produce a soft magnetic material having high saturation magnetization by heat-treating a Fe-based amorphous alloy, without needing the control of the atmosphere. The present disclosure provides a method for producing a soft magnetic material, comprising heat treating a Fe-based amorphous alloy in a state in which the alloy is wrapped with a sheet comprising one or more substances having a standard Gibbs energy of formation of an oxide thereof that is larger in a negative direction than Fe, to form a crystal phase.Type: ApplicationFiled: November 13, 2018Publication date: June 6, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kiyotaka ONODERA
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Patent number: 9941039Abstract: A soft magnetic member is formed such that, when a differential relative permeability in an applied magnetic field of 100 A/m is represented by a first differential relative permeability ??L, and when a differential relative permeability in an applied magnetic field of 40 kA/m is represented by a second differential relative permeability ??H, a ratio of the first differential relative permeability ??L to the second differential relative permeability ??H satisfies a relationship of ??L/??H?10, and a magnetic flux density in an applied magnetic field of 60 kA/m is 1.15 T or higher.Type: GrantFiled: June 12, 2015Date of Patent: April 10, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Okamoto, Kiyotaka Onodera, Shinjiro Saigusa, Kohei Ishii, Masashi Ohtsubo, Junghwan Hwang, Masaaki Tani, Takeshi Hattori
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Publication number: 20150364235Abstract: A soft magnetic member is formed such that, when a differential relative permeability in an applied magnetic field of 100 A/m is represented by a first differential relative permeability ??L, and when a differential relative permeability in an applied magnetic field of 40 kA/m is represented by a second differential relative permeability ??H, a ratio of the first differential relative permeability ??L to the second differential relative permeability ??H satisfies a relationship of ??L/??H?10, and a magnetic flux density in an applied magnetic field of 60 kA/m is 1.15 T or higher.Type: ApplicationFiled: June 12, 2015Publication date: December 17, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke OKAMOTO, Kiyotaka ONODERA, Shinjiro SAIGUSA, Kohei ISHII, Masashi OHTSUBO, Junghwan HWANG, Masaaki TANI, Takeshi HATTORI