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公开(公告)号：US11329573B2
公开(公告)日：2022-05-10
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：US10978916B2
公开(公告)日：2021-04-13
申请号：US16541896
申请日：2019-08-15
Inventor： Tsutomu Sakata , Hiroshi Yamamoto , Hiroshi Kanno , Kenichi Asanuma
Abstract: A power transmission device includes an inverter, an oscillator, a foreign substance detector, and power transmission control circuitry. The foreign substance detector performs a series of multiple processes to determine whether or not a foreign substance is present between two resonators. The power transmission control circuitry repeats a foreign substance detection period and a power transmission period alternately. The foreign substance detection period is a period in which the foreign substance detector performs one of the series of multiple processes. The power transmission period is a period in which the inverter transmits AC power. The power transmission control circuitry also causes the foreign substance detector to divide the series of multiple processes and determine whether or not the foreign substance is present as a result of performing all of the divided series of multiple processes.
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公开(公告)号：US10170939B2
公开(公告)日：2019-01-01
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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公开(公告)号：US09768643B2
公开(公告)日：2017-09-19
申请号：US14068453
申请日：2013-10-31
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 , H02J17/00 , 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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公开(公告)号：US10250082B2
公开(公告)日：2019-04-02
申请号：US15479688
申请日：2017-04-05
Inventor： Hiroshi Kanno , Kenichi Asanuma
IPC: H02J50/12 , H02J50/60 , H02J50/80 , H01F38/14 , H02J7/02 , B60L11/00 , B60L11/18 , H02J50/00 , H02J50/90
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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Patent Agency Ranking
公开(公告)号：US10148129B2
公开(公告)日：2018-12-04
申请号：US15199408
申请日：2016-06-30
Inventor： Kenichi Asanuma , Tsutomu Sakata , Atsushi Yamamoto , Hiroshi Kanno
Abstract: A power transmitting device determines transmitting power P(t1) at a beginning of a first unit time, and transmitting power P(t2) at an end of the first unit time, stores a control parameter Q(t3) that determines a voltage of the transmitting power at a beginning of a second unit time, and a control parameter Q(t4) that determines a voltage of the transmitting power at an end of the second unit time, determines a power difference ΔP=P(t2)−P(t1) and a difference ΔQ=Q(t4)−Q(t3) in the control parameter Q, and, if the ΔP is equal to or larger than a first threshold and an absolute value of the ΔQ is equal to or larger than a second threshold, determines that there is a foreign object between a receiver resonator and a transmitter resonator and decreases the transmitting power output from an inverter circuit.
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公开(公告)号：US09843200B2
公开(公告)日：2017-12-12
申请号：US14719324
申请日：2015-05-22
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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公开(公告)号：US09595834B2
公开(公告)日：2017-03-14
申请号：US14711788
申请日：2015-05-14
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: In a first power transmission period, a power transmission device holds, in a memory, a value indicating a frequency f0 corresponding to an actual voltage value that matches a requested voltage value, then causes first AC power to be transmitted by using the frequency f0, and uses a foreign substance detector to determine whether or not a foreign substance is present. When it is determined that no foreign substance is present, in a second power transmission period, the power transmission device causes the power transmission of the first AC power to be resumed by using the value indicating the frequency f0, the value being held in the memory.
Abstract translation: 在第一电力传输期间，电力传输装置在存储器中保持表示与要求电压值相匹配的实际电压值对应的频率f0的值，然后使用频率f0发送第一交流电力， 并使用异物检测器来确定是否存在异物。 当确定没有异物存在时，在第二发电周期中，电力传输装置通过使用表示频率f0的值来恢复第一AC电力的电力传输，该值被保持在存储器中 。
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9.发明授权公开(公告)号：US10886794B2
公开(公告)日：2021-01-05
申请号：US15906087
申请日：2018-02-27
Inventor： Kenichi Asanuma , Hiroshi Yamamoto
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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10.发明授权公开(公告)号：US10097047B2
公开(公告)日：2018-10-09
申请号：US15628772
申请日：2017-06-21
Inventor： Hiroshi Yamamoto , Kenichi Asanuma , Tsutomu Sakata , Hiroshi Kanno
IPC: H01F27/42 , H01F37/00 , H01F38/00 , H02J50/12 , G01V3/10 , H02J50/60 , H02J50/40 , H02J50/70 , H02J7/02 , H02J5/00 , H02J17/00
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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