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公开(公告)号：US20220246347A1
公开(公告)日：2022-08-04
申请号：US17622353
申请日：2020-08-05
摘要： A laminated coil includes planar coils and a first insulating member. The planar coils are arranged in a first direction intersecting a first surface. The first insulating member is in a film form and arranged between a pair of planar coils adjacent to each other in the first direction. At least one of the planar coils is wound to have a plurality of turns spaced apart from each other in a second direction along the first surface. A second insulating member is arranged between the turns adjacent to each other in the second direction of at least one of the planar coils.
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公开(公告)号：US20220108825A1
公开(公告)日：2022-04-07
申请号：US17425763
申请日：2020-03-04
发明人： Kazuya YAMAMOTO , Kenta FUJII , Tomohito FUKUDA , Takashi KUMAGAI
摘要： A coil device includes: a core having a first surface and a second surface located opposite to the first surface; a coil member including a first portion and a second portion that are spaced apart from each other in a first direction along the first surface; and a support portion in contact with the first surface and the second surface to support the core. The core includes a middle leg sandwiched between the first portion and the second portion in the first direction. The core is provided with a first slit as a first recessed portion recessed relative to the first surface and reaching the middle leg. The support portion includes a first protruding portion disposed inside the first slit and in contact with the middle leg.
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公开(公告)号：US20180025828A1
公开(公告)日：2018-01-25
申请号：US15541400
申请日：2016-02-19
发明人： Koji NAKAJIMA , Takashi KUMAGAI , Yuji SHIRAKATA , Yujiro KIDO , Kenji NISHIZAKA
CPC分类号： H01F27/2804 , H01F27/2876 , H01F27/40 , H01F2027/2809 , H01F2027/2819 , H01F2027/408 , H02M3/335 , H02M3/33507 , H05K1/0298 , H05K1/115
摘要： An insulation type step-down converter includes first and second step-down transformers each of which includes an input-side coil and an output-side coil. An intermediate portion of the output-side coil of the first step-down transformer and an intermediate portion of the output-side coil of the second step-down transformer are connected to each other. First, second, third, and fourth rectifier elements are connected in series with first, second, third, and fourth output-side coils, respectively. Smoothing coils are connected to the first to fourth output-side coils. The first, second, third, and fourth rectifier elements are connected such that electric currents flow simultaneously in the first output-side coil and the third output-side coil, and electric currents flow simultaneously in the second output-side coil and the fourth output-side coil in a manner alternating with the electric currents in the first output-side coil and the third output-side coil.
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公开(公告)号：US20210065957A1
公开(公告)日：2021-03-04
申请号：US16960360
申请日：2019-03-06
摘要： The present invention has an object of providing a reactor including cores with higher heat dissipation and a coil with less eddy-current loss. A reactor according to the present invention includes: a plurality of divided cores having a shape obtained by dividing an annular core in a circumferential direction, the divided cores being made of a soft magnetic material; a core gap part disposed between the divided cores in the annular core formed by combining the plurality of divided cores, the core gap part being made of a non-magnetic material; annular heat-dissipating cases that house the divided cores and the core gap part; and a coil wound around the heat-dissipating cases, wherein the heat-dissipating cases are made of a material whose thermal conductivity is as high as 100 W/(m·K) or more.
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公开(公告)号：US20190110355A1
公开(公告)日：2019-04-11
申请号：US16094561
申请日：2017-04-25
发明人： Shota SATO , Koji NAKAJIMA , Takashi KUMAGAI , Yuji SHIRAKATA
摘要： Provided is a highly reliable power circuit device. The power circuit device includes a printed substrate, a power circuit, and a housing. The power circuit is formed on the printed substrate. The housing is connected with the printed substrate. The power circuit includes secondary-side switching elements, at least one smoothing choke coil, and smoothing capacitors. Portions of a smoothing choke coil core serving as a core of the smoothing choke coil are inserted in opening portions formed in the printed substrate. A winding of the smoothing choke coil is formed on the printed substrate. The smoothing choke coil is located between a region C in which the smoothing capacitors are arranged and regions A and B serving as a second region in which primary-side switching elements and the secondary-side switching elements serving as electric elements are arranged.
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公开(公告)号：US20190066906A1
公开(公告)日：2019-02-28
申请号：US16080473
申请日：2016-04-25
摘要： A power conversion device includes: planar type coil components having plate-like winding members and cores attached to the winding members; a housing having recessed portions in which the coil components are accommodated in vertical arrangement; and fillers with which gaps between the recessed portions and the coil components are filled.
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公开(公告)号：US20220277882A1
公开(公告)日：2022-09-01
申请号：US17626136
申请日：2020-07-22
摘要： A core cooling structure includes a core and a housing. The core includes an upper core and a lower core. The core is attached to the housing. The upper core includes a heat dissipation fin that extends along a magnetic path and is disposed at an interval in a direction intersecting the magnetic path. The lower core is attached so as to be fitted into the housing.
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公开(公告)号：US20220102060A1
公开(公告)日：2022-03-31
申请号：US17426331
申请日：2020-03-06
发明人： Kenta FUJII , Takashi KUMAGAI , Tomohito FUKUDA
摘要： In a coil device of a power conversion device, a laminated coil includes planar coils laminated on a surface of a support. A plurality of cores are spaced apart from each other and aligned in a longitudinal direction of the planar coils, and each core includes a portion around which the laminated coil is wound on the surface of the support. A first protruding member (is arranged between a pair of cores adjacent to each other with respect to a longitudinal direction and is fixed to the support. A first fixing member is arranged above the first protruding member. The laminated coil is sandwiched and fixed between the first fixing member and the first protruding member such that a first surface is in contact with the first protruding member and a second surface is in contact with the first fixing member.
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公开(公告)号：US20210327630A1
公开(公告)日：2021-10-21
申请号：US17260673
申请日：2019-09-11
摘要： Inside a first case outer frame portion as an outer frame of the first case, a plurality of first core pieces and a partition to separate a pair of adjacent first core pieces among the plurality of first core pieces are disposed. The first case has a shape capable of accommodating at least a part of the second core piece. The first case outer frame portion includes a first case accommodating portion as a portion of the first case outer frame portion that is capable of accommodating the plurality of first core pieces, and a first case cover portion to cover a space inside the first case accommodating portion.
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公开(公告)号：US20200343155A1
公开(公告)日：2020-10-29
申请号：US16961143
申请日：2019-01-09
发明人： Hiroyuki KIYONAGA , Kenta FUJII , Tomohito FUKUDA , Shuji WAKAIKI , Takashi KUMAGAI , Hiroshi IKARASHI
摘要： A power conversion device that provides high heat dissipation and is easy to assemble. A power conversion device includes: a first heat dissipator; a second heat dissipator; a printed board having a first circuit pattern formed thereon; a first insulating member provided between first heat dissipator and printed board; a switching element including an electrode portion electrically bonded to first circuit pattern with a first bonding member interposed therebetween; a first fixing member bonded to an exposed surface of electrode portion; a heat dissipating member having one end bonded to first fixing member, and the other end provided between the switching element and second heat dissipator; a second insulating member sandwiched between second heat dissipator and switching element; and an installation portion.
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