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公开(公告)号：US10784753B2
公开(公告)日：2020-09-22
申请号：US16617731
申请日：2018-06-01
Applicant: NSK LTD.
Inventor： Shigeru Shimakawa , Yuri Shimizu , Takashi Sunaga , Masakazu Morimoto , Ryoichi Suzuki
Abstract: 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.
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公开(公告)号：US10388596B2
公开(公告)日：2019-08-20
申请号：US15516730
申请日：2015-11-20
Applicant: NSK LTD.
Inventor： Shigeru Shimakawa , Takashi Sunaga , Takaaki Sekine , Teruyoshi Kogure , Ryoichi Suzuki
IPC: B62D5/04 , G01R1/20 , H01C1/14 , H05K7/20 , H01L21/48 , H01L21/56 , H01L23/00 , H01L23/48 , H01L25/07 , H02K11/33 , H01L23/373 , H01L23/495 , H01L23/498
Abstract: 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.
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公开(公告)号：US10249558B2
公开(公告)日：2019-04-02
申请号：US15523478
申请日：2015-11-20
Applicant: NSK Ltd.
Inventor： Shigeru Shimakawa , Takashi Sunaga , Takaaki Sekine , Teruyoshi Kogure , Ryoichi Suzuki
IPC: H01L23/495 , H02K11/33 , B62D5/04 , G01R1/20 , H01L23/498 , H01L49/02 , H01L25/07 , H01L23/00 , H01L23/12 , H01L23/36 , H01L23/50 , H01L23/48 , H05K1/18 , H05K3/20
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US10604174B2
公开(公告)日：2020-03-31
申请号：US16080061
申请日：2017-03-02
Applicant: NSK LTD.
Inventor： Teruyoshi Kogure , Shigeru Shimakawa , Shin Kumagai , Ryoichi Suzuki
Abstract: A motor control unit that is connected to a motor release switch which includes FETs and is disposed between an inverter and a motor, including: a control section to detect an assist state of the inverter, to turn-ON or turn-OFF a control of the inverter based on a detection result and to detect whether abnormality is existed or not; a motor rotational speed detecting section to detect a motor rotational speed; an energy calculating section to calculate an energy based on the motor rotational speed; a judging section to turn-OFF all of the FETs of the motor release switch when the energy is within an area of safety operation; and a state detecting section to detect whether abnormality is existed or not based on information from an abnormality detecting section that detects abnormality of the sensors and the inverter, wherein the control section turns-ON the control of the inverter when the state detecting section does not detect abnormality and turns-OFF the control of the inverter when the state detecting section detects abnormality.
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公开(公告)号：US10381285B2
公开(公告)日：2019-08-13
申请号：US15777382
申请日：2016-11-24
Applicant: NSK Ltd.
Inventor： Shigeru Shimakawa
IPC: H01L23/34 , H01L23/367 , B62D5/04 , H01L23/12 , H01L23/36 , H05K1/02 , B60R16/023 , H05K7/20 , H01L23/00
Abstract: Provided are a heat dissipation substrate capable of improving heat dissipation properties of an electronic component, and an electric power steering device. In the heat dissipation substrate, a plurality of thermal vias are disposed at least in an electronic component projection region in which a region of a bottom surface portion of the electronic component is projected to a mounting surface in a direction perpendicular to the mounting surface, and a surface density of the thermal vias which occupy the mounting surface per unit area is at least partially different. The plurality of thermal vias are disposed so that the surface density of the thermal vias becomes the greatest in a dense region on an inner side of an edge portion of the electronic component projection region.
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公开(公告)号：US10418302B2
公开(公告)日：2019-09-17
申请号：US15777382
申请日：2016-11-24
Applicant: NSK Ltd.
Inventor： Shigeru Shimakawa
IPC: H01L23/34 , H01L23/367 , B62D5/04 , H01L23/12 , H01L23/36 , H05K1/02 , B60R16/023 , H05K7/20 , H01L23/00
Abstract: Provided are a heat dissipation substrate capable of improving heat dissipation properties of an electronic component, and an electric power steering device. In the heat dissipation substrate, a plurality of thermal vias are disposed at least in an electronic component projection region in which a region of a bottom surface portion of the electronic component is projected to a mounting surface in a direction perpendicular to the mounting surface, and a surface density of the thermal vias which occupy the mounting surface per unit area is at least partially different. The plurality of thermal vias are disposed so that the surface density of the thermal vias becomes the greatest in a dense region on an inner side of an edge portion of the electronic component projection region.
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公开(公告)号：US10096572B2
公开(公告)日：2018-10-09
申请号：US15535463
申请日：2015-12-02
Applicant: NSK LTD.
Inventor： Shigeru Shimakawa , Takashi Sunaga , Takaaki Sekine
IPC: H01L27/00 , H01L25/065 , H01L23/00 , H02M7/5387 , H02P27/08 , H02P6/28 , B62D5/04 , H01L23/50 , H01L23/14 , H01L23/13
Abstract: 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.
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公开(公告)号：US10259491B2
公开(公告)日：2019-04-16
申请号：US15317572
申请日：2015-05-08
Applicant: NSK Ltd.
Inventor： Naoto Shinkawa , Shigeru Fukinuki , Shin Kumagai , Shigeru Shimakawa , Teruyoshi Kogure
Abstract: An electric power steering apparatus that drive-controls a motor by an inverter, and a motor release-switch is connected between the inverter and the motor, comprising: a control section to detect an assist state on a driving control system and to ON/OFF-switch a control of the inverter based on a detection result; a motor rotational number detecting section to detect a rotational number of the motor; an energy calculating section to calculate an energy of a motor back-EMF and a regenerative current based on the rotational number; and a judging section to compare the energy with an area of safety operation of the motor release-switch and to OFF-switch the d motor release-switch when the energy becomes within the area of safety operation. As occasion demands, the area of safety operation is calculated with the temperature.
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