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公开(公告)号：US20240405678A1
公开(公告)日：2024-12-05
申请号：US18697682
申请日：2022-08-31
Inventor： Taiki NISHIMOTO , Masahiro YAMAOKA , Noriaki TAKEDA
Abstract: A voltage regulator includes chopper circuits connected in parallel, and a second series circuit. Each of the chopper circuits switches an input voltage and outputs the input voltage via a first inductor of a primary winding of a transformer, which includes the primary and secondary windings magnetically coupled with each other. The second series circuit includes a first series circuit and a third inductor connected in series, the first series circuit is configured by connecting second inductors of the secondary windings of the respective transformers of the chopper circuits in series, and both ends of the second series circuit are connected to first and second connection points connected to each other. The voltage regulator includes a first capacitor inserted between the first connection point and the output terminal, and a fourth inductor inserted between the first connection point and one end of one of the second inductors connected closest thereto.
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2.发明申请公开(公告)号：US20200006981A1
公开(公告)日：2020-01-02
申请号：US16490500
申请日：2018-02-26
Inventor： Atsushi YAMAMOTO , Masahiro YAMAOKA , Taiki NISHIMOTO , Motohiko FUJIMURA
Abstract: A control circuit of a code modulator sets first to third states to a code modulation circuit. In first state, first and fourth switch circuits are on, and second and third switch circuits are off. In second state, first and fourth switch circuits are off, and second and third switch circuits are on. In third state, all first to fourth switch circuits are on during transition from the first to second state, and vice versa. A control circuit of a code demodulator sets fourth to sixth states to a code demodulation circuit. In fourth state, fifth and eighth switch circuits are off, and sixth and seventh switch circuits are on. In fifth state, fifth and eighth switch circuits are on, and sixth and seventh switch circuits are off. In sixth state, all fifth to eighth switch circuits are on during transition from fourth to fifth state, and vice versa.
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公开(公告)号：US20180269796A1
公开(公告)日：2018-09-20
申请号：US15982605
申请日：2018-05-17
Inventor： Masahiro YAMAOKA , Takehiko YAMAKAWA , Motohiko FUJIMURA
IPC: H02M3/335
CPC classification number: H02M3/33592 , H02M1/00 , H02M3/337 , H02M2001/0009 , H02M2001/0058 , Y02B70/1433 , Y02B70/1475 , Y02B70/1491
Abstract: An electric power conversion device includes: a transformer including first and second windings magnetically coupled; a bridge circuit including a switch element; a rectifier circuit coupled to an output side of the transformer; a first resonant inductor; a second resonant inductor external to the transformer; and a resonant capacitor, wherein n1≥n2, Cr>C1, and Lr>L2 where Lr is an inductance value of the first resonant inductor and L2 is an inductance value including an inductance value of the second resonant inductor and an inductance value of a parasitic inductance component that is in series with the second winding in the pathway from the second winding to the rectifier circuit.
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公开(公告)号：US20200014215A1
公开(公告)日：2020-01-09
申请号：US16490498
申请日：2018-02-26
Inventor： Motohiko FUJIMURA , Masahiro YAMAOKA , Atsushi YAMAMOTO , Taiki NISHIMOTO
Abstract: A code modulator comprises: a first filter circuit connected between a pair of input ports, a second filter circuit connected between a pair of output ports, and a third filter circuit connected in parallel to each of switch circuits. A code demodulator comprises: a fourth filter circuit connected between a pair of input ports, a fifth filter circuit connected between a pair of output ports, and a sixth filter circuit connected in parallel to each of switch circuits.
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公开(公告)号：US20190319484A1
公开(公告)日：2019-10-17
申请号：US16347772
申请日：2017-11-07
Inventor： Masahiro YAMAOKA , Akira MINEGISHI , Junichi KANOU
Abstract: Each one of code modulators modulates first power to generate a code-modulated wave using a modulation code based on a code sequence, and transmits the code-modulated wave to one of code demodulators. Each one of code demodulator receives the code-modulated wave from one of the code modulators, and demodulates the received code-modulated wave to generate second power using a demodulation code based on a code sequence identical to the code sequence of the modulation code used. When power is transmitted between each one of transmitter and receiver pairs, a controller selects and assigns code sequences to the transmitter and receiver pairs, so as to reduce an average of an absolute value of a total current of the code-modulated waves of the transmitter and receiver pairs in a transmission path, as compared to a reference value, the average being averaged over a predetermined time.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20190165666A1
公开(公告)日：2019-05-30
申请号：US16321250
申请日：2017-07-28
Inventor： Taiki NISHIMOTO , Akira MINEGISHI , Atsushi YAMAMOTO , Masahiro YAMAOKA , Tohlu MATSUSHIMA , Osami WADA
Abstract: A switching circuit apparatus includes: a first capacitance provided between a first port terminal and a the first terminal of a switching circuit unit, a second capacitance provided between the first terminal and a conductor part, and a first inductance provided between a second port terminal and a second terminal of the switching circuit unit. The switching circuit apparatus is provided with: a first capacitor connected between the first port terminal and the second port terminal, and a second inductor connected between the second terminal and the conductor part. The second inductor has such an inductance that a ratio of the inductance of the second inductor to the first inductance is equal to a ratio of the first capacitance to the second capacitance.
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公开(公告)号：US20200067348A1
公开(公告)日：2020-02-27
申请号：US16467760
申请日：2017-12-07
Inventor： Atsushi YAMAMOTO , Motohiko FUJIMURA , Taiki NISHIMOTO , Masahiro YAMAOKA
Abstract: A power receiver apparatus receives a code-modulated wave from a power transmitter apparatus via a transmission path, the code-modulated wave including first power modulated by code modulation using a modulation code based on a code sequence. The power receiver apparatus is provided with a contactless connector and a code demodulator. The contactless connector is coupled to the transmission path without electrical contact with the transmission path, and receives the code-modulated wave from the power transmitter apparatus via the transmission path. The code demodulator demodulates the received code-modulated wave to generate second 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.
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公开(公告)号：US20200014214A1
公开(公告)日：2020-01-09
申请号：US16490491
申请日：2018-02-26
Inventor： Taiki NISHIMOTO , Masahiro YAMAOKA , Atsushi YAMAMOTO , Motohiko FUJIMURA
IPC: H02J4/00
Abstract: A current meter measures a current value associated with input power inputted to a code modulator. A code modulation circuit modulates the input power to generate a code-modulated wave by code modulation using a modulation code based on a code sequence, and transmits the code-modulated wave to the code demodulator via a transmission path. A control circuit controls the code modulation circuit. The code modulation circuit has operation modes different from each other depending on a direction of the input power, and a direction of the code-modulated wave to be generated. The control circuit generates waveform information indicating variations of direction of the input power over time, based on the current value measured by the current meter, and determines the operation mode of the code modulation circuit based on the waveform information.
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公开(公告)号：US20200014211A1
公开(公告)日：2020-01-09
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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公开(公告)号：US20190356132A1
公开(公告)日：2019-11-21
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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