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公开(公告)号：US20250149924A1
公开(公告)日：2025-05-08
申请号：US19011934
申请日：2025-01-07
Applicant: DENSO CORPORATION
Inventor： Yusei NAKAYASHIKI , Masaya TAKAHASHI , Nobuhisa YAMAGUCHI
Abstract: A power transmission device for supplying electric power wirelessly to a power reception device equipped with a power reception coil includes a power transmission resonance circuit equipped with a power transmission coil and a power transmission resonance capacitor connected in parallel therewith, a tertiary resonance circuit, and a power transmission control unit that controls the tertiary resonance switching element. The tertiary resonance circuit includes a tertiary coil, a tertiary resonance capacitor connected in parallel therewith, and a tertiary resonance switching element connected in parallel with the tertiary coil. The tertiary resonance switching element is operable to switch between an open state and a short-circuited state of the tertiary resonance switching element. When making a switch from an energized state to a standby state, the power transmission control unit short-circuits the tertiary resonance switching element to place the tertiary coil and the tertiary resonance capacitor in a non-resonance state.
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公开(公告)号：US20240097496A1
公开(公告)日：2024-03-21
申请号：US18522429
申请日：2023-11-29
Applicant: DENSO CORPORATION
Inventor： Yusei NAKAYASHIKI , Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Eisuke TAKAHASHI
IPC: H02J50/12 , B60L53/122 , B60L53/62 , H02J50/90
CPC classification number: H02J50/12 , B60L53/122 , B60L53/62 , H02J50/90
Abstract: A power supply system includes: a power transmission circuit provided on the ground side; a high frequency generation circuit that supplies high-frequency electric power to the power transmission circuit; a measurement unit that measures a physical quantity corresponding to the degree of coupling between the power transmission circuit and a power reception circuit provided in a vehicle; and a control unit. When the degree of coupling is determined, based on the measured physical quantity, to be lower than a predetermined degree, the control unit sets the impedance of the power transmission circuit to a first impedance and thereby sets the power transmission circuit to a non-resonant state. In contrast, when the degree of coupling is determined to be not lower than the predetermined degree, the control unit sets the impedance of the power transmission circuit to a second impedance and thereby sets the power transmission circuit to a resonant state.
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公开(公告)号：US20210391757A1
公开(公告)日：2021-12-16
申请号：US17460479
申请日：2021-08-30
Applicant: DENSO CORPORATION
Inventor： Takuya KIGUCHI , Nobuhisa YAMAGUCHI , Eisuke TAKAHASHI , Hayato SUMIYA , Tomoyuki FUJIKAWA , Koji MAZAKI , Shimpei TAKITA , Masaki KANESAKI , Masaya TAKAHASHI , Kazuhiro UDA , Yusei NAKAYASHIKI , Mitsuru SHIBANUMA , Kazuyoshi OBAYASHI
Abstract: A dynamic wireless power transfer system performs, through a plurality of primary coils installed along a traveling direction of a road and a secondary coil mounted in a vehicle, power transfer to the vehicle while the vehicle is traveling. The secondary coil is an M-phase coil including M coils, M denoting an integer which is two or higher. The M coils each include a coil end extending along a front-rear direction of the vehicle and a main coil portion extending along a width direction of the vehicle, the M coils each being configured such that a magnetic resistance of a magnetic path where a magnetic flux of the coil end passes is higher than a magnetic resistance of a magnetic path where a magnetic flux of the main coil portion passes.
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公开(公告)号：US20250105671A1
公开(公告)日：2025-03-27
申请号：US18974060
申请日：2024-12-09
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Yusei NAKAYASHIKI , Mitsuru SHIBANUMA , Nobuhisa YAMAGUCHI
Abstract: A power output circuit includes a plurality of circuit blocks that are provided in power wirings to which power is inputted and connected to each other side by side. Each of the plurality of circuit blocks includes at least a filter in a last post-stage. Each of the plurality of filters includes a reactor and a capacitor connected to the reactor at a node differing from an output node. Either of the reactor and the capacitor provided in each of the plurality of filters is connected to the power wirings in series so as to connect with the output node. A connection line between the reactor and the capacitor in one filter is connected to a connection line between the reactor and the capacitor in the remaining other filter.
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公开(公告)号：US20240072579A1
公开(公告)日：2024-02-29
申请号：US18383654
申请日：2023-10-25
Applicant: DENSO CORPORATION
Inventor： Shimpei TAKITA , Eisuke TAKAHASHI , Nobuhisa YAMAGUCHI , Yusei NAKAYASHIKI
CPC classification number: H02J50/402 , H02J50/005 , H02J50/12 , H02J50/70
Abstract: A coil assembly for wireless electrical power transmission includes a plurality of external connecting terminals, a power feeding coil, a resonant capacitor electrically connecting with the power feeding coil, and busbars each of which electrically connects between the external connecting terminals.
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Patent Agency Ranking
公开(公告)号：US20210114465A1
公开(公告)日：2021-04-22
申请号：US17134636
申请日：2020-12-28
Applicant: DENSO CORPORATION
Inventor： Eisuke TAKAHASHI , Nobuhisa YAMAGUCHI , Koji MAZAKI , Shimpei TAKITA , Hayato SUMIYA , Masaki KANESAKI , Takuya KIGUCHI , Kazuhiro UDA , Mitsuru SHIBANUMA , Kazuyoshi OBAYASHI , Tomoyuki FUJIKAWA , Masaya TAKAHASHI , Yusei NAKAYASHIKI
Abstract: A contactless power supply system is provided for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle. The contactless power supply system includes a plurality of primary coils installed along a traveling direction in a road and a secondary coil mounted to the vehicle. Each of the primary coils is a single-phase coil with the secondary coil being a multi-phase coil, or is a multi-phase coil with the secondary coil being a single-phase coil.
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公开(公告)号：US20250125662A1
公开(公告)日：2025-04-17
申请号：US18989421
申请日：2024-12-20
Applicant: DENSO CORPORATION
Inventor： Yusei NAKAYASHIKI , Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Hidetoshi YAMADA , Masaki KANESAKI
IPC: H02J50/40 , B60L53/122 , H02J50/12 , H02J50/90
Abstract: A wireless power transmission system includes a plurality of power transmission devices capable of wirelessly transmitting electric power to a power reception device; The plurality of power transmission devices is installed in an area in which a mobile object is movable and each equipped with a power transmission coil that wirelessly transmits electric power to the power reception device of the mobile object; There are provided main power lines that supply to the plurality of power transmission devices alternating current (AC) power at a first voltage for use in power transmission, and a direct current (DC) power supply unit that receives the AC power from the main power lines and outputs power at a second voltage that is lower than the first voltage and is used for control within each of the plurality of power transmission devices.
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公开(公告)号：US20250055323A1
公开(公告)日：2025-02-13
申请号：US18931818
申请日：2024-10-30
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Mitsuru SHIBANUMA , Yusei NAKAYASHIKI , Eisuke TAKAHASHI , Kazuyoshi OBAYASHI , Nobuhisa YAMAGUCHI
IPC: H02J50/12 , B60L53/122 , H01F38/14 , H02J50/40
Abstract: A wireless power supply apparatus that supplies power to a reception apparatus in a wireless manner, the wireless power supply apparatus including: a power source apparatus that outputs an AC power, a transmission coil electrically connected to the power source apparatus; and a setting circuit interposed between the power source apparatus and the transmission coil, setting the transmission coil to be in either a power feeding state or a standby state, wherein the setting circuit is provided separately from the power source apparatus.
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公开(公告)号：US20230396100A1
公开(公告)日：2023-12-07
申请号：US18235168
申请日：2023-08-17
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Mitsuru SHIBANUMA , Kazuyuki KATO , Yusei NAKAYASHIKI , Eisuke TAKAHASHI , Nobuhisa YAMAGUCHI
CPC classification number: H02J50/12 , H02J7/00712 , H02J50/402 , H02J7/0047 , H02J50/70
Abstract: A primary-side resonant circuit of a power transmission apparatus has an impedance varying element that increases, when supply of electric power is stopped, an input impedance of the primary-side resonant circuit so as to have predetermined standby current flowing through a primary-side coil. A power reception apparatus includes a magnetic flux amplifier circuit configured to amplify magnetic flux generated by the standby current flowing through the primary-side coil of the primary-side resonant circuit. The power transmission apparatus further includes a primary-side detection circuit configured to detect a change in the voltage of the primary-side coil, a change in electric current flowing through the primary-side coil or a change in a magnetic field in the vicinity of the primary-side coil; each of the changes is caused by the magnetic flux amplified by the magnetic flux amplifier circuit.
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公开(公告)号：US20230387723A1
公开(公告)日：2023-11-30
申请号：US18232690
申请日：2023-08-10
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Mitsuru SHIBANUMA , Kazuyuki KATO , Yusei NAKAYASHIKI , Eisuke TAKAHASHI , Nobuhisa YAMAGUCHI
Abstract: A wireless power transmission system is provided which wirelessly transfer electric power from a power transmitter to a power receiver. The wireless power transmission system works to set a capacitance of a primary capacitor of a primary resonant circuit to undergo resonance with a self-inductance of a primary coil at an angular frequency that is an operating frequency. A tertiary capacitor of a tertiary resonant circuit has a capacitance set to undergo resonance with a self-inductance of a tertiary coil. A secondary capacitor of a secondary resonant circuit has a capacitance set to reduce a reactive component of ac power arising from self-inductances and mutual inductances of the primary coil, the secondary coil, and the tertiary coil.
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