Patents by Inventor Hirotaka Kamijo
Hirotaka Kamijo 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: 11328853Abstract: A reactor includes a bobbin around which a coil is wound, and a core extending through the bobbin. The bobbin has a tubular shape. The core has a quadrangular prism shape. The core includes a distal end surface and a pair of side surfaces perpendicular to the distal end surface. The side surfaces are opposite surfaces of the core. The bobbin includes projections respectively provided on inner surfaces of the bobbin. The inner surfaces of the bobbin respectively face the side surfaces of the core. The projections extend in an axial direction of a tubular portion of the bobbin. The projections are in contact with the core.Type: GrantFiled: December 3, 2018Date of Patent: May 10, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Miyauchi, Hirotaka Kamijo
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Patent number: 11264907Abstract: A multi-phase converter has a plurality of voltage converter circuits connected in parallel; current sensors provided in the voltage converter circuits respectively; and a controller configured to calculate an estimated value of a total input current inputted to the multi-phase converter. The controller may be configured to output a notification signal that indicates an abnormality in one of the current sensors when a difference between a total sum of measured values of all the current sensors and the estimated value is outside a predetermined allowable range.Type: GrantFiled: March 6, 2020Date of Patent: March 1, 2022Assignee: DENSO CORPORATIONInventors: Yuto Aisaka, Hirotaka Kamijo
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Publication number: 20200304027Abstract: A multi-phase converter may include: a plurality of voltage converter circuits connected in parallel; current sensors provided in the voltage converter circuits respectively; and a controller configured to calculate an estimated value of a total input current inputted to the multi-phase converter. The controller may be configured to output an abnormality notification signal indicating abnormality in one of the current sensors when a difference between a total sum of measured values of all the current sensors and the estimated value is outside a predetermined allowable range.Type: ApplicationFiled: March 6, 2020Publication date: September 24, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuto AISAKA, Hirotaka KAMIJO
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Publication number: 20190198222Abstract: A reactor includes a bobbin around which a coil is wound, and a core extending through the bobbin. The bobbin has a tubular shape. The core has a quadrangular prism shape. The core includes a distal end surface and a pair of side surfaces perpendicular to the distal end surface. The side surfaces are opposite surfaces of the core. The bobbin includes projections respectively provided on inner surfaces of the bobbin. The inner surfaces of the bobbin respectively face the side surfaces of the core. The projections extend in an axial direction of a tubular portion of the bobbin. The projections are in contact with the core.Type: ApplicationFiled: December 3, 2018Publication date: June 27, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki MIYAUCHI, Hirotaka KAMIJO
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Patent number: 10020106Abstract: A reactor includes a reactor body and a heat sink. The reactor body includes coil wire wound around a core. The heat sink is fixed to the reactor body through a heat transfer sheet. The heat sink includes a restricting wall for the heat transfer sheet such that expansion of the heat transfer sheet in a first direction is restricted more than expansion of the heat transfer sheet in a second direction. The first direction is an extending direction of the coil wire on a surface of the reactor body, which abuts on the heat transfer sheet. The second direction is an axis direction of the coil wire.Type: GrantFiled: December 21, 2015Date of Patent: July 10, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Miyauchi, Hirotaka Kamijo, Shuichi Hirata, Satoshi Ito
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Patent number: 9613746Abstract: A reactor includes a heat dissipation sheet and a main body. The main body includes a first coil, a second coil, a resin cover and a pressing frame. The resin cover has a central section that covers side surfaces of the first and second coil between the first and second coil. The pressing frame extends along outer peripheries of bottom surfaces of the first coil and the second coil. The pressing frame is configured to press the heat dissipation sheet toward the cooler. The pressing frame has a coupled section that is coupled to a lower surface of the central section. The pressing frame is able to be displaced in a vertical direction with respect to the resin cover other than the central section.Type: GrantFiled: January 20, 2016Date of Patent: April 4, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Miyauchi, Hirotaka Kamijo, Futoshi Kashiwagi
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Publication number: 20160217899Abstract: A reactor includes a heat dissipation sheet and a main body. The main body includes a first coil, a second coil, a resin cover and a pressing frame. The resin cover has a central section that covers side surfaces of the first and second coil between the first and second coil. The pressing frame extends along outer peripheries of bottom surfaces of the first coil and the second coil. The pressing frame is configured to press the heat dissipation sheet toward the cooler. The pressing frame has a coupled section that is coupled to a lower surface of the central section. The pressing frame is able to be displaced in a vertical direction with respect to the resin cover other than the central section.Type: ApplicationFiled: January 20, 2016Publication date: July 28, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki MIYAUCHI, Hirotaka KAMIJO, Futoshi KASHIWAGI
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Publication number: 20160189846Abstract: A reactor includes a reactor body and a heat sink. The reactor body includes coil wire wound around a core. The heat sink is fixed to the reactor body through a heat transfer sheet. The heat sink includes a restricting wall for the heat transfer sheet such that expansion of the heat transfer sheet in a first direction is restricted more than expansion of the heat transfer sheet in a second direction. The first direction is an extending direction of the coil wire on a surface of the reactor body, which abuts on the heat transfer sheet. The second direction is an axis direction of the coil wire.Type: ApplicationFiled: December 21, 2015Publication date: June 30, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki MIYAUCHI, Hirotaka KAMIJO, Shuichi HIRATA, Satoshi ITO
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Publication number: 20140137702Abstract: A vehicle control system (100) includes a rotary electric machine unit (40), a PCU (14) including an inverter circuit, and a controller (18). The rotary electric machine unit (40) includes a casing defining an interior space and containing a rotary electric machine and a lubricating cooling fluid disposed therein and a cover, and a breather (70) which is connected to the interior space via an on-off valve (58). The on-off valve (58) is normally in an open state. The controller (18) outputs a valve-closing signal to the on-off valve (58) when a single phase short circuit fault occurs in the inverter circuit which drives the rotary electric machine. A mechanical mechanism can also be used to place the on-off valve (58) into a closed state.Type: ApplicationFiled: November 22, 2013Publication date: May 22, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Tsukashima, Hirotaka Kamijo, Tomoko Shimana, Daisuke Umiguchi
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Publication number: 20130046426Abstract: A vehicle control system (100) includes a rotary electric machine unit (40), a PCU (14) including an inverter circuit, and a controller (18). The rotary electric machine unit (40) includes a casing defining an interior space and containing a rotary electric machine and a lubricating cooling fluid disposed therein and a cover, and a breather (70) which is connected to the interior space via an on-off valve (58). The on-off valve (58) is normally in an open state. The controller (18) outputs a valve-closing signal to the on-off valve (58) when a single phase short circuit fault occurs in the inverter circuit which drives the rotary electric machine. A mechanical mechanism can also be used to place the on-off valve (58) into a closed state.Type: ApplicationFiled: May 18, 2010Publication date: February 21, 2013Inventors: Hiroyuki Tsukashima, Hirotaka Kamijo, Tomoko Shimana, Daisuke Umiguchi