Patents by Inventor Takashi Sunaga
Takashi Sunaga 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: 10784753Abstract: An electric drive device and an electric power steering device that reduce temperature increase of a magnetic sensor are provided. The electric drive device includes: an electric motor; an electronic control device including a magnet at an anti-load side end of a shaft to control drive of the electric motor, and a circuit board on the anti-load side of the shaft on an extended line in an axial direction of the shaft; first coil wiring connecting the first coil groups of the electric motor to the circuit board; and second coil wiring connecting the second coil groups of the electric motor to the circuit board. Each of the first and second coil wiring includes a first portion projecting in a direction intersecting the axial direction of the shaft to the outside of the housing, and a second portion projecting outside the housing from the first portion toward the circuit board.Type: GrantFiled: June 1, 2018Date of Patent: September 22, 2020Assignee: NSK LTD.Inventors: Shigeru Shimakawa, Yuri Shimizu, Takashi Sunaga, Masakazu Morimoto, Ryoichi Suzuki
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Publication number: 20200195098Abstract: An electric drive device and an electric power steering device that reduce temperature increase of a magnetic sensor are provided. The electric drive device includes: an electric motor; an electronic control device including a magnet at an anti-load side end of a shaft to control drive of the electric motor, and a circuit board on the anti-load side of the shaft on an extended line in an axial direction of the shaft; first coil wiring connecting the first coil groups of the electric motor to the circuit board; and second coil wiring connecting the second coil groups of the electric motor to the circuit board. Each of the first and second coil wiring includes a first portion projecting in a direction intersecting the axial direction of the shaft to the outside of the housing, and a second portion projecting outside the housing from the first portion toward the circuit board.Type: ApplicationFiled: June 1, 2018Publication date: June 18, 2020Applicant: NSK LTD.Inventors: Shigeru SHIMAKAWA, Yuri SHIMIZU, Takashi SUNAGA, Masakazu MORIMOTO, Ryoichi SUZUKI
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Patent number: 10513290Abstract: An electric power steering apparatus that enables more precise estimation of a coil temperature by considering a heat transfer phenomenon between a control substrate and a poly-phase coil in addition to a heat transfer phenomenon between respective phases of the coil. The apparatus includes a control substrate that controls a poly-phase motor, a temperature sensor that detects a substrate temperature of the control substrate and a coil temperature estimating section that estimates coil temperatures of respective phases of the poly-phase motor by a motor current of the phase and the substrate temperature based on a heat transfer phenomenon between the respective phases that is caused by a difference in temperature between coils of the respective phases and a heat transfer phenomenon between the coil and the control substrate.Type: GrantFiled: July 4, 2017Date of Patent: December 24, 2019Assignee: NSK LTD.Inventors: Takahiro Tsubaki, Tomohiro Miura, Takashi Sunaga, Nobuaki Kogure
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Publication number: 20190337560Abstract: An electric power steering apparatus that enables more precise estimation of a coil temperature by considering a heat transfer phenomenon between a control substrate and a poly-phase coil in addition to a heat transfer phenomenon between respective phases of the coil. The apparatus includes a control substrate that controls a poly-phase motor, a temperature sensor that detects a substrate temperature of the control substrate and a coil temperature estimating section that estimates coil temperatures of respective phases of the poly-phase motor by a motor current of the phase and the substrate temperature based on a heat transfer phenomenon between the respective phases that is caused by a difference in temperature between coils of the respective phases and a heat transfer phenomenon between the coil and the control substrate.Type: ApplicationFiled: July 4, 2017Publication date: November 7, 2019Applicant: NSK LTD.Inventors: Takahiro TSUBAKI, Tomohiro MIURA, Takashi SUNAGA, Nobuaki KOGURE
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Patent number: 10418737Abstract: A terminal connection component including press-fit terminals and terminal metal-fittings. The press-fit terminals have a plate shape in which a taper is disposed at one tip, and the terminal metal-fittings also have a plate shape in which a fitting section is disposed at one end side. The fitting sections of the terminal metal-fittings have a first hole part and a second hole part from the one end in parallel. The tips of the press-fit terminals are press-fitted and are connected to the fitting sections of the terminal metal-fittings, and a portion between the first hole part and the second hole part of the fitting section, which serves as an elastic deformation section, is elastically deformed in a thickness direction of the press-fit terminal and biases the press-fit terminal so that the press-fit terminals are surely press-fitted to the fitting sections of the terminal metal-fittings.Type: GrantFiled: August 23, 2017Date of Patent: September 17, 2019Assignee: NSK LTD.Inventors: Takashi Sunaga, Tadayoshi Osakabe
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Publication number: 20190267926Abstract: [Problem] An object of the present invention is to provide an electric power steering apparatus that enables more precise estimation of a coil temperature for a poly-phase motor by considering a heat transfer phenomenon between a control substrate and a coil in addition to a heat transfer phenomenon between the coils. [Means for solving the problem] An electric power steering apparatus that comprises a control substrate that controls a poly-phase motor having two-system motor windings, comprises a temperature sensor that detects a substrate temperature of the control substrate, and a coil temperature estimating section that estimates all coil temperatures by all motor currents of the poly-phase motor and the substrate temperature based on a heat transfer phenomenon between all coils that is caused by a difference in temperature between the all coils and a heat transfer phenomenon between the coil and the control substrate.Type: ApplicationFiled: November 8, 2017Publication date: August 29, 2019Applicant: NSK Ltd.Inventors: Takahiro TSUBAKI, Tomohiro MIURA, Takashi SUNAGA, Nobuaki KOGURE, Haruhiko KAMIGUCHI
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Patent number: 10388596Abstract: An electronic part mounting heat-dissipating substrate which includes lead frames of wiring pattern shapes formed by conductor plate and an insulating member 130 which is provided between the lead frames 110, wherein a plate surface of a part arrangement surface of said conductor plate and a top surface of said insulating member at a side of said part arrangement surface form one continuous surface, the lead frames have different thicknesses, the thick lead frame 110H is used for a large current signal and the thin lead frame 110L is used for a small current signal, a plate surface of a back surface of the part arrangement surface and a top surface of the insulating member at a side of the back surface at the part arrangement surface-side are formed in an identical plane.Type: GrantFiled: November 20, 2015Date of Patent: August 20, 2019Assignee: NSK LTD.Inventors: Shigeru Shimakawa, Takashi Sunaga, Takaaki Sekine, Teruyoshi Kogure, Ryoichi Suzuki
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Publication number: 20190173216Abstract: A terminal connection component including press-fit terminals and terminal metal-fittings. The press-fit terminals have a plate shape in which a taper is disposed at one tip, and the terminal metal-fittings also have a plate shape in which a fitting section is disposed at one end side. The fitting sections of the terminal metal-fittings have a first hole part and a second hole part from the one end in parallel. The tips of the press-fit terminals are press-fitted and are connected to the fitting sections of the terminal metal-fittings, and a portion between the first hole part and the second hole part of the fitting section, which serves as an elastic deformation section, is elastically deformed in a thickness direction of the press-fit terminal and biases the press-fit terminal so that the press-fit terminals are surely press-fitted to the fitting sections of the terminal metal-fittings.Type: ApplicationFiled: August 23, 2017Publication date: June 6, 2019Applicant: NSK Ltd.Inventors: Takashi SUNAGA, Tadayoshi OSAKABE
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Patent number: 10249558Abstract: An electronic heat-dissipating substrate including: lead frames of wiring pattern shapes on a conductor plate; and an insulating member between the lead frames. A plate surface of the lead frames and a top surface of the insulating member form one continuous surface. The part arrangement surface is on both surfaces of the electronic part mounting heat-dissipating substrate, a reductant circuit which includes at least similar dual-system circuit is formed on the electronic part mounting heat-dissipating substrate, a first-system circuit of the dual-system circuit is formed on a first surface of the electronic part mounting heat-dissipating substrate, a second-system circuit of the dual-system circuit is formed on a second surface of the electronic part mounting heat-dissipating substrate, and the common lead frames used in a portion of a circuit wiring are used to the first surface and the second surface of the electronic part mounting heat-dissipating substrate.Type: GrantFiled: November 20, 2015Date of Patent: April 2, 2019Assignee: NSK LTD.Inventors: Shigeru Shimakawa, Takashi Sunaga, Takaaki Sekine, Teruyoshi Kogure, Ryoichi Suzuki
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Patent number: 10192818Abstract: An electronic part mounting heat-dissipating substrate which includes: a conductor plate which is formed on lead frames of wiring pattern shapes; and an insulating member which is provided between the lead frames of the wiring pattern shapes on the conductor plate; wherein a plate surface of a part arrangement surface of the conductor plate and a top surface of the insulating member at a side of the part arrangement surface form one continuous surface, wherein a plate surface of a back surface of the part arrangement surface of the conductor plate and a top surface of the insulating member at a side of the back surface at the part arrangement surface-side are formed in an identical plane, wherein the substrate is formed in a circular shape.Type: GrantFiled: November 20, 2015Date of Patent: January 29, 2019Assignee: NSK LTD.Inventors: Shigeru Simakawa, Takashi Sunaga, Takaaki Sekine, Teruyoshi Kogure, Ryoichi Suzuki
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Patent number: 10096572Abstract: A power semiconductor module that comprises plural arrangements of power semiconductor elements comprising a power semiconductor bare chip which one electrode portion thereof is connected to a metal plate which at least one external connecting terminal is formed and other external connecting terminals which are electrically connected to other electrode portions of the power semiconductor bare chip, and that are contained in a same package, comprises wherein the power semiconductor elements are basically same outline, electrodes of the bare chip of the power semiconductor elements are mutually connected between the power semiconductor elements with a metal connector or a wiring, and the package is a resin mold package that seals the power semiconductor elements with an electrical insulating resin.Type: GrantFiled: December 2, 2015Date of Patent: October 9, 2018Assignee: NSK LTD.Inventors: Shigeru Shimakawa, Takashi Sunaga, Takaaki Sekine
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Patent number: 9937582Abstract: A resistance welding device is provided with a moving distance measuring section for measuring distances between conductors to be joined before and after joining and evaluating joining quality based on the distances, and a projection including a base and a projecting surface is provided to the conductor to be connected in order to easily secure a distance between the conductors after the joining.Type: GrantFiled: April 15, 2015Date of Patent: April 10, 2018Assignee: NSK LTD.Inventors: Takashi Sunaga, Noboru Kaneko, Osamu Miyoshi, Ryoichi Suzuki
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Publication number: 20170338201Abstract: [Problem] An object of the present invention is to miniaturize and integrate plural power semiconductors in an electronic circuit in a low cost without occurrence of a problem of a heat dissipation or the like.Type: ApplicationFiled: December 2, 2015Publication date: November 23, 2017Applicant: NSK LTD.Inventors: Shigeru SHIMAKAWA, Takashi SUNAGA, Takaaki SEKINE
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Publication number: 20170309556Abstract: An electronic heat-dissipating substrate including: lead frames of wiring pattern shapes on a conductor plate; and an insulating member between the lead frames. A plate surface of the lead frames and a top surface of the insulating member form one continuous surface. The part arrangement surface is on both surfaces of the electronic part mounting heat-dissipating substrate, a reductant circuit which includes at least similar dual-system circuit is formed on the electronic part mounting heat-dissipating substrate, a first-system circuit of the dual-system circuit is formed on a first surface of the electronic part mounting heat-dissipating substrate, a second-system circuit of the dual-system circuit is formed on a second surface of the electronic part mounting heat-dissipating substrate, and the common lead frames used in a portion of a circuit wiring are used to the first surface and the second surface of the electronic part mounting heat-dissipating substrate.Type: ApplicationFiled: November 20, 2015Publication date: October 26, 2017Applicant: NSK Ltd.Inventors: Shigeru SHIMAKAWA, Takashi SUNAGA, Takaaki SEKINE, Teruyoshi KOGURE, Ryoichi SUZUKI
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Publication number: 20170309555Abstract: [Problem] An object of the present invention is to provide an electronic part mounting heat-dissipating substrate which enables a circuit for which a power semiconductor in which a large current flows is used to reduce the wiring resistances of a large power operation and improve the heat dissipation.Type: ApplicationFiled: November 20, 2015Publication date: October 26, 2017Applicant: NSK LTD.Inventors: Shigeru SHIMAKAWA, Takashi SUNAGA, Takaaki SEKINE, Teruyoshi KOGURE, Ryoichi SUZUKI
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Publication number: 20170294374Abstract: An electronic part mounting heat-dissipating substrate which includes: a conductor plate which is formed on lead frames of wiring pattern shapes; and an insulating member which is provided between the lead frames of the wiring pattern shapes on the conductor plate; wherein a plate surface of a part arrangement surface of the conductor plate and a top surface of the insulating member at a side of the part arrangement surface form one continuous surface, wherein a plate surface of a back surface of the part arrangement surface of the conductor plate and a top surface of the insulating member at a side of the back surface at the part arrangement surface-side are formed in an identical plane, wherein the substrate is formed in a circular shapeType: ApplicationFiled: November 20, 2015Publication date: October 12, 2017Applicant: NSK Ltd.Inventors: Shigeru SIMAKAWA, Takashi SUNAGA, Takaaki SEKINE, Teruyoshi KOGURE, Ryoichi SUZUKI
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Patent number: 9633967Abstract: To provide a semiconductor module that has high reliability of electric connection by a solder and is inexpensive. A joint surface of an electrode jointing portion that is opposed to a surface to be jointed of a gate electrode of a bare-chip FET and a joint surface of a substrate jointing portion that is opposed to a surface to be jointed of another wiring pattern include an outgas releasing mechanism that makes outgas generated from a molten solder during solder jointing of a metal plate connector be released from solders interposed between the joint surfaces and the surfaces to be jointed.Type: GrantFiled: October 6, 2014Date of Patent: April 25, 2017Assignee: NSK Ltd.Inventors: Takashi Sunaga, Noboru Kaneko, Osamu Miyoshi, Ryoichi Suzuki
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Patent number: 9609775Abstract: To provide a semiconductor module capable of shortening of the manufacturing tact time, reducing the manufacturing costs, and improving assembility. A semiconductor module (30) includes substrate (31) made of metal, an insulating layer (32) formed on the substrate (31), a plurality of wiring patterns (33a to 33d) formed on the insulating layer (32), a bare-chip transistor (35) mounted on a wiring pattern (33a) via a solder (34a); and a metal plate connector (36a, 36b) jointing an electrode (S, G) of the bare-chip transistor (35) and a wiring pattern (33b, 33c) via a solder (34b, 34c). The metal plate connector (36a, 36b) has a bridge shape, and has a flat surface and a center of gravity at a middle portion of the component.Type: GrantFiled: October 25, 2013Date of Patent: March 28, 2017Assignee: NSK Ltd.Inventors: Takashi Sunaga, Noboru Kaneko, Osamu Miyoshi
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Publication number: 20170080513Abstract: A resistance welding device is provided with a moving distance measuring section for measuring distances between conductors to be joined before and after joining and evaluating joining quality based on the distances, and a projection including a base and a projecting surface is provided to the conductor to be connected in order to easily secure a distance between the conductors after the joining.Type: ApplicationFiled: April 15, 2015Publication date: March 23, 2017Applicant: NSK LTD.Inventors: Takashi SUNAGA, Noboru KANEKO, Osamu MIYOSHI, Ryoichi SUZUKI
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Patent number: D853913Type: GrantFiled: December 6, 2017Date of Patent: July 16, 2019Assignee: NSK LTD.Inventors: Takashi Sunaga, Masakazu Morimoto