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公开(公告)号：US10158256B2
公开(公告)日：2018-12-18
申请号：US15374316
申请日：2016-12-09
Inventor： Kenichi Asanuma , Atsushi Yamamoto , Tsutomu Sakata , Akio Hidaka , Toshiaki Kikui
IPC: H01F27/42 , H01F37/00 , H01F38/00 , H02J50/12 , H02J50/70 , H02J50/40 , H01F38/14 , H02J5/00 , H02J7/02 , H02J50/10
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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12.发明授权公开(公告)号：US10020692B2
公开(公告)日：2018-07-10
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.
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公开(公告)号：US10014855B2
公开(公告)日：2018-07-03
申请号：US15590826
申请日：2017-05-09
Inventor： Taiki Nishimoto , Atsushi Yamamoto , Shoichi Hara
IPC: H02M7/00 , H02M7/02 , H03K17/567 , H02M3/158 , H03K17/0412 , H02M3/335 , H02M1/00
CPC classification number: H03K17/567 , H02M1/08 , H02M3/1584 , H02M3/33584 , H02M7/5387 , H02M2001/0003 , H02M2001/0045 , H03K17/0412 , H03K17/063 , H03K2217/0009 , H03K2217/0045
Abstract: An electric power conversion circuit includes: first through fourth port terminals; a first diode having an anode connected to the first port terminal; a second diode having a cathode connected to the second port terminal; a third diode having a cathode connected to the first port terminal; a fourth diode having an anode connected to the second port terminal; first through fourth switches that are bridge-connected between a cathode of the first diode and an anode of the second diode; fifth through eighth switches that are bridge-connected between an anode of the third diode and a cathode of the fourth diode; a first bootstrap circuit that is connected to control terminals of the first through fourth switches; and a second bootstrap circuit that is connected to control terminals of the fifth through eighth switches.
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公开(公告)号：US09620282B2
公开(公告)日：2017-04-11
申请号：US13983617
申请日：2012-11-14
Inventor： Kenichi Asanuma , Atsushi Yamamoto , Tsutomu Sakata
CPC classification number: H01F38/14 , H02J7/025 , H02J17/00 , H02J50/10 , H02J50/12 , H02J50/70 , H04B5/0037 , H04B5/0075
Abstract: A power transfer system is provided with a transmission coil and a reception coil respectively provided along a first surface and a second surface that face each other proximal to each other. The transmission coil and reception coil are provided proximally to be electromagnetically coupled to each other. The winding wire of the transmission coil is wound on the first surface, and the winding wire of the reception coil is wound on the second surface. The power transfer system is provided with a magnetic body provided proximately so as to be electromagnetically coupled to the transmission coil and the reception coil to cover at least one part of a region in which at least the winding wires of the transmission coil and reception coil are present between the first surface and the second surface.
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公开(公告)号：US11201472B2
公开(公告)日：2021-12-14
申请号：US16490422
申请日：2018-02-26
Inventor： Masahiro Yamaoka , Atsushi Yamamoto , Motohiko Fujimura , Taiki Nishimoto
Abstract: A code modulator transmits power to at least one code demodulator via a transmission path. The code modulator is provided with: a code modulation circuit to which output power of a power supply is supplied, the code modulation circuit modulating the output power of the power supply to generate a code-modulated wave by code modulation using a modulation code based on a code sequence, and transmitting the code-modulated wave to the code demodulator via the transmission path; and a control circuit that controls the code modulation circuit. The control circuit sets a frequency of the modulation code to a multiple of an output power frequency of the power supply.
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Patent Agency Ranking
公开(公告)号：US10468960B2
公开(公告)日：2019-11-05
申请号：US15485712
申请日：2017-04-12
Inventor： Taiki Nishimoto , Atsushi Yamamoto , Shoichi Hara , Kohei Masuda , Akira Minegishi
Abstract: A code modulator includes: a code-modulation circuit that code-modulates input power with a modulation code to generate code-modulated power which is alternating-current power; and a terminal through which the code-modulated power is transmitted, the terminal being connected to a transmission path.
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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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18.发明授权公开(公告)号：US10122289B2
公开(公告)日：2018-11-06
申请号：US15366119
申请日：2016-12-01
Inventor： Masahiro Yamaoka , Junichi Kanou , Akira Minegishi , Atsushi Yamamoto , Kohei Masuda
Abstract: A converter includes: a terminal that receives code-modulated power into which first alternating-current power has been code-modulated with a modulation code; and a circuit that converts the code-modulated power with a conversion code to generate second alternating-current power. The conversion code is based on the modulation code. A frequency of the second alternating-current power is higher than a frequency of the first alternating-current power.
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公开(公告)号：US09979437B2
公开(公告)日：2018-05-22
申请号：US15472937
申请日：2017-03-29
Inventor： Atsushi Yamamoto , Shoichi Hara , Taiki Nishimoto
CPC classification number: H04B3/54 , H04B3/542 , H04B2203/5425 , H04L5/143 , H04L27/2601
Abstract: A power receiving apparatus includes: a communication circuit that receives a control signal from a power transmitting apparatus through a wired transmission line; a control circuit that determines a propagation time in which the control signal is propagated from the power transmitting apparatus to the power receiving apparatus through the wired transmission line; and a demodulation circuit that receives modulated power from the power transmitting apparatus through a wired transmission line, and demodulates, based on the determined propagation time, the modulated power in synchronization with a phase of the modulated power.
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公开(公告)号：US11336095B2
公开(公告)日：2022-05-17
申请号：US16476248
申请日：2017-12-25
Inventor： Motohiko Fujimura , Masahiro Yamaoka , Atsushi Yamamoto , Taiki Nishimoto
Abstract: The power transmitter apparatus is provided with code modulators which modulate powers of phase components of three-phase alternating-current power to generate code-modulated waves, respectively, by code modulation using modulation codes based on code sequences different from each other, and transmits the code-modulated waves to the at least one power receiver apparatus via the transmission path. The power receiver apparatus is provided with code demodulators, each of which demodulates one code-modulated wave of the received code-modulated waves to generate code-demodulated power by code demodulation using a demodulation code based on a code sequence identical to the code sequence of the modulation code used for the code modulation of the one code-modulated wave, the code-demodulated power being generated as power of one of phase components of multiphase alternating-current power.
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