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1.发明申请公开(公告)号：US20180191207A1
公开(公告)日：2018-07-05
申请号：US15906087
申请日：2018-02-27
Inventor： Kenichi ASANUMA , Hiroshi YAMAMOTO
CPC classification number: H02J50/90 , G01B7/003 , G01B2210/58 , G01R27/2611 , H02J5/005 , H02J7/025 , H02J50/12
Abstract: A power transmission apparatus oscillates alternating current power at a first frequency (f1) which is lower than a resonant frequency (fr) of the second resonator and at a second frequency (f2) which is higher than the resonant frequency (fr). The power transmission apparatus measures an inductance value Lin (f1) and an inductance value Lin (f2). The inductance value Lin (f1) is measured when the oscillation circuit oscillates alternating current power at the first frequency (f1), and the inductance value Lin (f2) is measured when the oscillation circuit oscillates alternating current power at the second frequency (f2). The power transmission apparatus calculates a coupling coefficient k by using an expression represented by k2=1−Lin(f2)/Lin(f1), to detect relative position of the second resonator to the first resonator on the basis of the coupling coefficient k.
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公开(公告)号：US20170092420A1
公开(公告)日：2017-03-30
申请号：US15374316
申请日：2016-12-09
Inventor： Kenichi ASANUMA , Atsushi YAMAMOTO , Tsutomu SAKATA , Akio HIDAKA , Toshiaki KIKUI
Abstract: A contactless connector apparatus is provided with a first coil closely opposed to a second coil so as to be electromagnetically coupled thereto. The first coil includes: an inner transmitter coil wound around an axis passing through its center; and an outer transmitter coil wound around the axis and outside the inner coil. One end of the outer transmitter coil is connected to one end of the inner transmitter coil such that, when a current flows through the transmitter coils, a direction of a loop current generated around the axis by a current flowing through the inner transmitter coil is opposite to that of a loop current generated around the axis by a current flowing through the outer transmitter coil. A self-inductance of the outer transmitter coil is larger than that of the inner transmitter coil.
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公开(公告)号：US20250140470A1
公开(公告)日：2025-05-01
申请号：US18834498
申请日：2022-12-15
Inventor： Hong-An SHIH , Kenichi ASANUMA , Koji TAKAHASHI
Abstract: A coupled inductor includes: a magnetic body; a first conductor provided at least partially inside the magnetic body; and a second conductor provided at least partially inside the magnetic body and coupled to the first conductor. The magnetic body includes: a first surface and a second surface facing away from each other; and a third surface and a fourth surface facing away from each other and orthogonal to the first surface and the second surface. The first conductor includes: a first terminal provided at the first surface; and a second terminal provided at the second surface. The second conductor includes: a third terminal provided at the third surface; and a fourth terminal provided at the fourth surface.
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4.发明申请公开(公告)号：US20170288412A1
公开(公告)日：2017-10-05
申请号：US15628772
申请日：2017-06-21
Inventor： Hiroshi YAMAMOTO , Kenichi ASANUMA , Tsutomu SAKATA , Hiroshi KANNO
CPC classification number: H02J50/12 , G01V3/10 , H02J5/005 , H02J7/025 , H02J17/00 , H02J50/40 , H02J50/60 , H02J50/70
Abstract: A power transmission device includes an inverter using a frequency f11 lower than a frequency f0 between a first resonator and a second resonator or a frequency f12 higher than the frequency f0 to generate a first power; an oscillator using a frequency f10 lower than a frequency fr between the first resonator and the second resonator or a frequency f20 higher than the frequency fr to generate a second power; and a power transmission control circuitry setting a foreign object detection period between first and second transmission periods, using the frequency f11 or frequency f12 in the first transmission period, using the frequency f10 or frequency f20 in the foreign object detection period, and if it is determined that a substance is present in the foreign object detection period, transmitting power in the second transmission period at a frequency different from the frequency used in the first transmission period.
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公开(公告)号：US20170179772A1
公开(公告)日：2017-06-22
申请号：US15118165
申请日：2014-02-28
Inventor： Kenichi ASANUMA , Atsushi YAMAMOTO , Hiroshi YAMAMOTO , Hiroshi KANNO
Abstract: A foreign object detector detects a metallic foreign object between a first resonator and a second resonator which is composed of a parallel resonant circuit including a coil and a capacitor. The foreign object detector includes the first resonator; an oscillator circuit capable of oscillating at a first frequency (f1) which is lower than a resonant frequency (fr) of the second resonator and at a second frequency (f2) which is higher than the resonant frequency (fr); and a measurement circuit to measure changes in input impedance of the first resonator. The measurement circuit detects a metallic foreign object between the first resonator and the second resonator based on: changes in input impedance of the first resonator as measured by the measurement circuit while the oscillator circuit is oscillating at the first frequency f1; and changes in input impedance of the first resonator as measured by the measurement circuit while the oscillator circuit is oscillating at the second frequency f2.
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Patent Agency Ranking
公开(公告)号：US20220181985A1
公开(公告)日：2022-06-09
申请号：US17440685
申请日：2020-03-05
Inventor： Kenichi ASANUMA , Fumito KUSAMA
Abstract: A power conversion system configured to determine whether or not an abnormality is present in a power conversion circuit, and diagnosis method and program for the power conversion circuit are provided. A power conversion system includes a power conversion circuit, a snubber circuit, and a diagnosis unit. The power conversion circuit includes a transformer and a switching element configured to be electrically connected to the transformer, and the power conversion circuit is configured to convert electric power. The snubber circuit is electrically connected to the transformer and is configured to extract electrical energy from the power conversion circuit. The diagnosis unit is configured to make diagnosis for the power conversion circuit in accordance with at least one of a voltage at a terminal of the transformer, a voltage generated at the snubber circuit, or a current generated at the snubber circuit.
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公开(公告)号：US20210159809A1
公开(公告)日：2021-05-27
申请号：US16636586
申请日：2018-07-26
Inventor： Kenichi ASANUMA , Makoto OZONE
IPC: H02M7/5395 , H02J3/32 , H02J3/38 , H02M1/00 , H02M7/5387
Abstract: A power conversion system according to the present disclosure includes a plurality of power converters for performing power conversion on AC power and is connected to a power grid of multi-phase power that is a combination of multiple alternating current sources with mutually different phases. Each of the plurality of power converters includes a power converter circuit, a setting unit, and a control circuit. The power converter circuit performs power conversion between either DC power or AC power and AC power supplied from any of the multiple alternating current sources. The setting unit selects one of the multiple alternating current sources as a target of the power conversion to be performed by the power converter circuit. The control circuit controls operation of the power converter circuit in accordance with selection made by the setting unit.
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公开(公告)号：US20180069435A1
公开(公告)日：2018-03-08
申请号：US15805633
申请日：2017-11-07
Inventor： Tsutomu SAKATA , Hiroshi YAMAMOTO , Hiroshi KANNO , Kenichi ASANUMA
Abstract: A power transmission device includes an inverter, an oscillator, a foreign substance detector, and a power transmission control circuitry. The power transmission control circuitry causes the foreign substance detector to perform a series of multiple processes and determine whether a foreign substance is present before a transmission of first AC power starts, and then causes the inverter to start the transmission of the first AC power. After the transmission starts, a detection period in which foreign substance detecting is performed and a power transmission period in which transmission of the first AC power is performed are repeated. The series of multiple processes is divided and performed in the multiple repeated detecting periods. The foreign substance detector is caused to divide and perform the series of multiple processes using the detecting periods and determine whether a foreign substance is present.
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9.发明申请公开(公告)号：US20170207668A1
公开(公告)日：2017-07-20
申请号：US15479688
申请日：2017-04-05
Inventor： Hiroshi KANNO , Kenichi ASANUMA
CPC classification number: H02J50/60 , B60L11/007 , B60L11/182 , B60L11/1824 , B60L11/1833 , B60L2200/12 , B60L2210/10 , B60L2210/30 , B60L2210/40 , B60L2230/22 , B60L2240/36 , H01F38/14 , H02J7/025 , H02J50/00 , H02J50/12 , H02J50/80 , H02J50/90 , Y02T10/7005 , Y02T10/7088 , Y02T10/7216 , Y02T10/7241 , Y02T90/12 , Y02T90/121 , Y02T90/122 , Y02T90/125 , Y02T90/127 , Y02T90/14
Abstract: A power transmitting antenna includes a first resonant circuit including a power transmitting coil, a power receiving antenna includes a second resonant circuit including a power receiving coil. When the power transmitting antenna and the power receiving antenna are electromagnetically coupled to each other, the power transmitting antenna and the power receiving antenna have an odd-mode resonance frequency corresponding to an odd-mode resonant condition, and an even-mode resonance frequency corresponding to an even-mode resonant condition, and the even-mode resonance frequency is higher than the odd-mode resonance frequency. A wireless power transmitting apparatus is provided with a power transmitting circuit configured to generate high-frequency power at a variable frequency, and supply the high-frequency power to the power transmitting antenna. A control circuit sets the frequency of the high-frequency power generated by the power transmitting circuit to one of the odd-mode resonance frequency and the even-mode resonance frequency.
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10.发明申请FOREIGN OBJECT DETECTOR, POWER TRANSMITTER, POWER RECEIVER, AND WIRELESS POWER TRANSMISSION SYSTEM 有权外部物体检测器，发电机，电力接收器和无线电力传输系统公开(公告)号：US20160149442A1
公开(公告)日：2016-05-26
申请号：US14904581
申请日：2014-03-05
Inventor： Kenichi ASANUMA , Atsushi YAMAMOTO , Hiroshi YAMAMOTO
Abstract: A foreign object detector includes: an oscillator circuit 100 having a coil 110 and resonant capacitors Cx, Cy, the oscillator circuit 100 being configured to output a voltage which includes an AC component and a DC component, the AC component having a positive cycle and a negative cycle; and an electric circuit for sensing a variation of the AC component and a variation of the DC component in the voltage output from the oscillator circuit 100 when a foreign object approaches the coil 110.
Abstract translation: 异物检测器包括：具有线圈110和谐振电容器Cx，Cy的振荡器电路100，振荡器电路100被配置为输出包括AC分量和DC分量的电压，AC分量具有正周期和 负循环; 以及用于感测当异物接近线圈110时从振荡器电路100输出的电压中的交流分量的变化和直流分量的变化的电路。
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