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公开(公告)号：US20190108937A1
公开(公告)日：2019-04-11
申请号：US16093421
申请日：2017-11-04
发明人： Koji NAKAJIMA , Takashi KUMAGAI , Yuji SHIRAKATA , Yujiro KIDO
CPC分类号： H02M3/3353 , H01F27/24 , H01F27/2804 , H01F2027/2809 , H02M3/28 , H02M3/335 , H02M3/33569 , H02M2001/0064
摘要： An insulation type step-up converter includes a core, first and second primary-side coils, a secondary-side coil, and a switching element. The core includes a middle leg, and first and second outer legs. The switching element is configured such that it can be controlled to be on/off so that electric currents flowing simultaneously in the first and second primary-side coils are opposite in direction to each other.
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公开(公告)号：US20190019609A1
公开(公告)日：2019-01-17
申请号：US16069375
申请日：2017-01-04
发明人： Kenta FUJII , Koji NAKAJIMA , Yuji SHIRAKATA , Jun TAHARA , Takashi KUMAGAI
摘要： A circuit device and a power converter include a core, a coil surrounding at least a part of the core, and a first heat transfer member being in surface contact with the core. A temperature rise of the core can thus be prevented or reduced.
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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：US20170194873A1
公开(公告)日：2017-07-06
申请号：US15325949
申请日：2015-06-12
发明人： Keita TAKAHASHI , Kazuki SAKATA , Yoshiyuki DEGUCHI , Takuto YANO , Mamoru TAKIKITA , Kazutoshi AWANE , Koji NAKAJIMA , Takao MITSUI , Kosuke NAKANO , Masayoshi TAMURA , Masashi SAKAI
IPC分类号： H02M7/00 , H01L23/552 , H01L25/18 , H01L23/367 , H03H1/00 , H02M7/537 , H05K7/20
CPC分类号： H02M7/003 , H01L23/36 , H01L23/3675 , H01L23/552 , H01L25/07 , H01L25/18 , H01L2924/0002 , H02M7/48 , H02M7/537 , H03H1/00 , H03H2001/0085 , H05K7/209 , H01L2924/00
摘要： A power converter includes: a base conductor, an electrically heating member which is provided on the base conductor, a noise reduction capacitor of flat plate-shape in which via an insulator, a plurality of first electrodes and second electrodes are alternately layered, on one surface, the first electrode in an outermost layer is exposed and on another surface, the second electrode in an outermost layer is exposed, a relay conductor which is electrically connected to other members from the electrically heating member via the noise reduction capacitor, and the second electrode in an outermost layer of the noise reduction capacitor is face-joined to a face of the base conductor at a side where the electrically heating member is provided and the first electrode in an outermost layer and the relay conductor are face-joined.
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公开(公告)号：US20190180923A1
公开(公告)日：2019-06-13
申请号：US16310667
申请日：2017-03-10
发明人： Koji NAKAJIMA , Shota SATO , Yuji SHIRAKATA , Kenta FUJII , Jun TAHARA
摘要： An isolated converter reduced in size compared with a conventional isolated converter and having a high heat dissipation characteristic is provided. The isolated converter includes a multilayer substrate having a first through hole and a magnetic core partially passing through the first through hole. The multilayer substrate includes a first conductor pattern formed at a position overlapping the magnetic core on a second surface when viewed from a direction orthogonal to a first surface, a second conductor pattern formed between the first surface and the second surface at a position overlapping the magnetic core and the first conductor pattern when viewed from the direction orthogonal to the first surface, at least one thermal conductive member formed on the first conductor pattern and having a portion disposed between the multilayer substrate and the magnetic core, and an electric insulating layer electrically insulating the first conductor pattern from the second conductor pattern.
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公开(公告)号：US20180178656A1
公开(公告)日：2018-06-28
申请号：US15728691
申请日：2017-10-10
CPC分类号： B60L3/04 , B60L3/0007 , B60L3/003 , B60L15/007 , B60L2210/10 , B60L2210/40 , B60L2240/421 , B60L2240/425 , B60L2240/525 , B60L2240/527 , H02P6/24 , Y02T10/7258
摘要： When a motor rotation speed is equal to or greater than a predetermined rotation speed when an automobile collision is detected or when power stops, a motor rotation speed reduction control is carried out by an inverter control unit, and when an inter-terminal voltage of a secondary smoothing capacitor drops below a predetermined voltage during the motor rotation speed reduction control, the motor rotation speed reduction control is stopped, whereby induction voltage caused by motor rotation is applied to the secondary smoothing capacitor, the inter-terminal voltage of the secondary smoothing capacitor is raised, and the motor rotation speed reduction control is carried out while keeping the inter-terminal voltage of the secondary smoothing capacitor within an operating voltage range of the inverter control unit.
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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：US20220264769A1
公开(公告)日：2022-08-18
申请号：US17629813
申请日：2020-08-26
发明人： Yu KISHIWADA , Koji NAKAJIMA , Taro KIMURA , Kenichi TAMURA , Yoshikazu NOZUKI , Masaya NONOMURA , Kenta FUJII
摘要： A power converter includes a cooler, a housing, a cooling plate, an insulating heat dissipation member, and a circuit board. The housing includes a bottom, a sidewall, and an internal space. The bottom is connected to the cooler. The cooling plate is connected to the bottom so as to stand upright with respect to the bottom. The insulating heat dissipation member is disposed on the cooling plate. The circuit board is connected to the cooling plate with the insulating heat dissipation member interposed therebetween. The cooling plate, the insulating heat dissipation member, and the circuit board are accommodated in the internal space of the housing. The cooling plate is disposed with a gap from the sidewall.
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公开(公告)号：US20220103075A1
公开(公告)日：2022-03-31
申请号：US17426753
申请日：2019-09-13
发明人： Kenichi TAMURA , Koji NAKAJIMA , Yoshikazu NOZUKI , Masaya NONOMURA , Taro KIMURA , Yu KISHIWADA
摘要： A power converter includes a circuit board, a first magnetic core, and a housing. The circuit board includes an insulating substrate and a first coil conductor. The insulating substrate includes a first side surface. The first magnetic core includes a first magnetic core member and a second magnetic core member. A first side surface of the insulating substrate is opposed to a first portion of the housing and is spaced away from the first portion of the housing. The first magnetic core member and the second magnetic core member are both thermally connected to the first portion.
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公开(公告)号：US20190019618A1
公开(公告)日：2019-01-17
申请号：US16069681
申请日：2017-01-10
发明人： Kazuaki FUKUI , Koji NAKAJIMA , Shota SATO , Kenta FUJII
摘要： A printed circuit board includes at least one of a first coil pattern disposed on a first main surface and a second coil pattern disposed on a second main surface. The first coil pattern includes a first portion arranged between a first core portion and a second core portion. The second coil pattern includes a third portion arranged between the first core portion and the second core portion. A first heat transfer member is mounted on at least one of the first portion and the third portion. Therefore, temperature increase of at least one of the first portion and the third portion can be suppressed.
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