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公开(公告)号：US20190089243A1
公开(公告)日：2019-03-21
申请号：US16088326
申请日：2017-03-30
发明人： Atsushi NAITO , Fumihiro KAGAWA , Yoshiki NAGATA , Shunsuke AMBO , Keiji YASHIRO , Kazuhiro SHIRAISHI
摘要： This on-vehicle power conversion apparatus is provided with: a power conversion circuit to which DC power is inputted; and a noise reduction unit that is configured to reduce common- mode noise and normal-mode noise which are included in the DC power and that is provided to the input side of the power conversion circuit. The noise reduction unit is provided with: a core having a first core part and a second core part; a common-mode chalk coil having a first winding wire wound around the first core part and a second winding wire wound around the second coil part; and a smoothing capacitor that constitutes a low-pass filter circuit cooperatively with the common-mode chalk coil. The power conversion apparatus is further provided with a damping unit provided at a position intersecting the magnetic path of a magnetic flux leakage.
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公开(公告)号：US20170274735A1
公开(公告)日：2017-09-28
申请号：US15468359
申请日：2017-03-24
发明人： Takao KAWASAKI , Yoshiki NAGATA , Fumihiro KAGAWA , Shunsuke AMBO , Koki SUZUKI
摘要： An in-vehicle inverter device includes a noise reduction circuit, which has a common mode choke coil configured to reduce common mode noise and normal mode noise contained in DC power, and an inverter circuit, which receives the DC power in which the noise has been reduced. The noise reduction circuit includes: an input-side capacitor and an input-side resistor provided on the input side of the choke coil; an output-side capacitor and an output-side resistor provided on the output side of the choke coil; a first filter circuit that includes the choke coil, the input-side capacitor, and the input-side resistor; and a second filter circuit that includes the choke coil, the output-side capacitor, and the output-side resistor. The first and the second filter circuits reduce leakage noise generated in the inverter circuit.
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公开(公告)号：US20210088038A1
公开(公告)日：2021-03-25
申请号：US17017882
申请日：2020-09-11
摘要： An in-vehicle motor-driven compressor includes a common mode choke coil including an annular core having a through-hole, a first winding and a second winding wound around the core, and an annular conductor. The second winding is opposed to the first winding while being spaced apart from the first winding. The conductor surrounds the first and second windings, and the core. The conductor includes sections opposed to each other with the through-hole in between. The core is symmetrical with respect to at least one symmetry axis when the through-hole is viewed from the front. The first winding is located on one side of the at least one symmetry axis, and the second winding is located on the other side of the symmetry axis, so that the at least one symmetry axis is located between the first and second windings. The core includes an exposed section not covered with the conductor.
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公开(公告)号：US20200298654A1
公开(公告)日：2020-09-24
申请号：US16088346
申请日：2017-03-30
发明人： Fumihiro KAGAWA , Atsushi NAITO , Yoshiki NAGATA , Shunsuke AMBO , Keiji YASHIRO , Kazuhiro SHIRAISHI
摘要： An on-board electric compressor that comprises: a housing; a compression unit; an electric motor; and an inverter device. The inverter device comprises: an inverter circuit that converts direct current power to alternating current power; and a noise reduction unit that is provided on an input side of the inverter circuit and that reduces common mode noise and normal mode noise that are included in the direct current power. The noise reduction unit comprises: a common mode choke coil; and a smoothing capacitor that, in cooperation with the common mode choke coil, constitutes a low pass filter circuit. The common mode choke coil has: a core that has a first core part and a second core part; a first winding that is wound around the first core part; and a second winding that is wound around the second core part.
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公开(公告)号：US20190305648A1
公开(公告)日：2019-10-03
申请号：US16366262
申请日：2019-03-27
发明人： Shunsuke AMBO , Fumihiro KAGAWA , Hiroshi FUKASAKU , Yoshiki NAGATA , Junya KAIDA , Takashi KAWASHIMA , Yoshikazu HAYASHI , Hidehiro KUDO , Takahiro OKAZAKI , Takashi YOSHIDA
摘要： An on-vehicle motor-driven compressor includes a compression unit, an electric motor, and an inverter device. The inverter device includes an inverter circuit and a noise reducer. The noise reducer includes a common-mode choke coil and a smoothing capacitor. The common-mode choke coil includes a loop-shaped core, a first winding wound around the core, a second winding wound around the core, the second winding being spaced apart from and opposed to the first winding, and a loop-shaped conductor that covers the core while extending over the first winding and the second winding. The core includes an exposed portion that is not covered with the conductor. Parts of the conductor that are opposed to each other between the first winding and the second winding are spaced apart from each other.
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公开(公告)号：US20240056016A1
公开(公告)日：2024-02-15
申请号：US18365459
申请日：2023-08-04
发明人： Takuya NARUSE , Shunsuke AMBO , Takashi OGAMI
摘要： An electric motor device includes an electric motor, an inverter, a noise reducer, a control unit, and a metal housing. The controller controls switching elements using a PWM signal generated from a voltage instruction value and a carrier frequency. The control unit includes a calculation portion that calculates a modulation factor of the voltage instruction value and a setting portion that sets the carrier frequency in accordance with the modulation factor. The carrier frequency set by the setting portion is higher when the modulation factor is less than a predetermined modulation factor than when the modulation factor is greater than or equal to the predetermined modulation factor.
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公开(公告)号：US20210090776A1
公开(公告)日：2021-03-25
申请号：US17017938
申请日：2020-09-11
摘要： An in-vehicle motor-driven compressor includes a common mode choke coil. The common mode choke coil includes an annular core having a through-hole, a first winding and a second winding wound around the core, and a coated conductive wire. The second winding is opposed to the first winding while being spaced apart from the first winding. The coated conductive wire is wound around the core so as to surround the first winding, the second winding, and the core. The coated conductive wire has sections that are opposed to each other with the through-hole in between. An electric wire of the coated conductive wire is wound multiple turns around the core so as to at least partly overlap with the first and second windings. Both ends of the electric wire are electrically connected to each other. The core includes an exposed section that is not covered with the coated conductive wire.
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公开(公告)号：US20190301490A1
公开(公告)日：2019-10-03
申请号：US16365982
申请日：2019-03-27
发明人： Shunsuke AMBO , Fumihiro KAGAWA , Yoshiki NAGATA
摘要： An on-vehicle motor-driven compressor includes a compression unit, an electric motor, and an inverter device. The inverter device includes an inverter circuit and a noise reducer. The noise reducer includes a common-mode choke coil and a smoothing capacitor. The common-mode choke coil includes a case, a loop-shaped core accommodated in the case, a first winding and a second winding that are wound around the case, and a loop-shaped conductor that covers the core and the case. Parts of the conductor that are opposed to each other between the first winding and the second winding are spaced apart from each other. The case includes two projections that project from an outer surface of the case. The conductor is held by the two projections such that the conductor is spaced apart from the first winding and the second winding.
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公开(公告)号：US20180123546A1
公开(公告)日：2018-05-03
申请号：US15787824
申请日：2017-10-19
发明人： Fumihiro KAGAWA , Shunsuke AMBO , Yoshiki NAGATA
CPC分类号： H03H7/0115 , F04B17/03 , F04B35/04 , F04B39/121 , H01F17/045 , H01F27/24 , H01F27/28 , H01F27/367 , H02P27/06 , H02P27/08
摘要： An in-vehicle motor-driven compressor includes a housing, a compression portion, an electric motor, and an inverter device. The inverter device includes a low-pass filter circuit, which reduces normal-mode noise included in DC power, and an inverter circuit, which converts the DC power into AC power. The low-pass filter circuit includes a normal-mode coil, which includes a pillar-shaped core extending in one direction and a winding wound around the core and forms an open magnetic circuit. The core includes two end faces in a direction in which the core extends. The inverter device includes a damping portion. The damping portion is arranged at a position where the damping portion is opposed to at least one of the two end faces of the core and an eddy current is generated by magnetic force lines produced in the normal-mode coil.
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公开(公告)号：US20240145152A1
公开(公告)日：2024-05-02
申请号：US18383139
申请日：2023-10-24
发明人： Shun ITO , Kazuhiro SHIRAISHI , Yoshiki NAGATA , Takashi KAWASHIMA , HIROSHI FUKASAKU , Shunsuke AMBO
CPC分类号： H01F17/062 , H01F27/292 , H02M1/123
摘要： A motor-driven compressor includes an inverter device. The inverter device includes a common mode choke coil. The common mode choke coil includes an annular core, two windings wound around the core, and an annular conductor that covers the two windings. The conductor is divided into a first metal plate and a second metal plate, which are combined to form an annular shape such that induced current flows in a circumferential direction of the conductor so as to hinder changes in leakage magnetic flux from the core. The second metal plate is thermally connected to the housing. The first metal plate is thermally connected to the second metal plate. At least one of an electrical resistance value or a thermal resistance value in a current path of the induced current is lower in the second metal plate than in the first metal plate.
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