公开(公告)号：US20240106276A1

公开(公告)日：2024-03-28

申请号：US18524755

申请日：2023-11-30

Applicant: DENSO CORPORATION

Inventor： Mitsuru SHIBANUMA ,  Eisuke TAKAHASHI ,  Masaya TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Kazuyuki KATO

IPC: H02J50/12 ,  H02J50/00 ,  H02J50/40

CPC classification number: H02J50/12 ,  H02J50/005 ,  H02J50/402

Abstract: A wireless power supply system includes a plurality of power transmission units that receives and supplies power to a power receiving unit via the power transmission coil in a resonance state, and a switching control unit that switches a state of a first power transmission unit to a resonance state when the magnitude of the magnetic flux generated in a first power transmission coil of the first power transmission unit, which is one of the plurality of power transmission units, is greater than a predetermined threshold value, and switches to a non-resonance state when the magnitude is less than the threshold value. The threshold is set as a magnitude that exceeds the magnetic flux generated in the first power transmission coil due to coupling between the first power transmission coil and a second power transmission coil of a second power transmission unit, which is adjacent to first power transmission coil.

公开(公告)号：US20220320909A1

公开(公告)日：2022-10-06

申请号：US17842992

申请日：2022-06-17

Applicant: DENSO CORPORATION

Inventor： Yuusei NAKAYASHIKI ,  Masaya TAKAHASHI ,  Eisuke TAKAHASHI ,  Nobuhisa YAMAGUCHI

IPC: H02J50/12 ,  H02J50/40 ,  H01F38/14 ,  H02J50/70

Abstract: In a wireless power transfer apparatus, a characteristic adjuster has a frequency characteristic that causes, in a power transfer mode from at least one power transmission unit to a power receiving apparatus, a resonant power transmission circuit to have a resonance frequency that substantially matches an operating frequency. The reactance of a power transmission coil has a reference value in the power transfer mode. The frequency characteristic of the characteristic adjuster causes, in a power non-transfer mode from the at least one power transmission unit to the power receiving apparatus, a reactance of a power transmission coil to become an adjusted value that is higher than the reference value.

公开(公告)号：US20220149663A1

公开(公告)日：2022-05-12

申请号：US17580380

申请日：2022-01-20

Applicant: DENSO CORPORATION

Inventor： Hayato SUMIYA ,  Eisuke TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Masaya TAKAHASHI

IPC: H02J50/12 ,  H04B5/00 ,  H02J50/50 ,  B60L50/53

Abstract: In a dynamic wireless power transfer system, a power transmission coil is provided in a road. A power transmission circuit supplies electric power to the power transmission coil. A power reception coil is provided in a vehicle. A power reception circuit is connected to the power reception coil. A relay circuit is provided in a tire of the vehicle. The relay circuit includes at least two relay coils that are connected in series. The relay circuit transfers electric power from the power transmission coil to the power reception coil by one relay coil of the two relay coils opposing the power transmission coil and the other relay coil opposing the power reception coil. A resonance frequency of the relay circuit is a frequency that is within a fixed range that is centered on an applied frequency of an alternating-current voltage that is applied to the power transmission coil.

公开(公告)号：US20220032778A1

公开(公告)日：2022-02-03

申请号：US17505136

申请日：2021-10-19

Applicant: DENSO CORPORATION

Inventor： Masaki KANESAKI ,  Mitsuru SHIBANUMA ,  Hayato SUMIYA ,  Takuya KIGUCHI ,  Eisuke TAKAHASHI ,  Shinpei TAKITA ,  Masaya TAKAHASHI ,  Kazuhiro UDA ,  Yuusei NAKAYASHIKI ,  Kazuyoshi OBAYASHI ,  Nobuhisa YAMAGUCHI

IPC: B60L3/00 ,  B60R16/033

Abstract: In an in-motion power supply system with a plurality of power supply segments to supply power to a vehicle, a vehicle position detection unit detects a position of the vehicle relative to each segment. An electrical characteristic acquisition unit acquires electrical characteristics in the segment involved in power transfer, and an abnormality determination unit uses the electrical characteristics to determine whether there is an abnormality in the segment involved in power transfer. The abnormality determination unit shares the electrical characteristics between a subject segment subjected to abnormality determination and at least one of a previous segment previous to the subject segment and a subsequent segment subsequent to the subject segment, and compares the electrical characteristics in the subject segment with at least either the electrical characteristics in the previous segment or the electrical characteristics in the subsequent segment to determine whether the electrical characteristics in the subject segment are abnormal.

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

IPC: B60L9/00 ,  H02J50/12 ,  H02J50/40

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.

公开(公告)号：US20170373592A1

公开(公告)日：2017-12-28

申请号：US15628769

申请日：2017-06-21

Applicant: DENSO CORPORATION ,  NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY

Inventor： Eisuke TAKAHASHI ,  Masaya TAKAHASHI ,  Kimihiro NISHIJIMA

IPC: H02M3/156 ,  H02M3/07 ,  H02M3/155

CPC classification number: H02M3/156 ,  H02M3/07 ,  H02M3/1582 ,  H02M2001/0058 ,  H02M2001/344 ,  H02M2003/1555 ,  H02M2003/1566

Abstract: In a power converter, a first electrical path connects between the series resonant circuit and a selected terminal from the high- and low-side input and output terminals of the power converter. An auxiliary diode is provided on one of the series resonant circuit and the first electrical path. An auxiliary switch, when turned on, causes an inductor current to flow through the auxiliary diode to the resonance inductor, thus storing electromagnetic energy into the resonance inductor, and causes the resonance inductor and the capacitance component of the series resonant circuit to resonate with each other. A second electrical path bypasses the auxiliary switch for flow of the inductor current. A discharge unit is provided on the second electrical path. The discharge unit is activated to discharge the electromagnetic energy stored in the resonance inductor via the second electrical path.

公开(公告)号：US20170237332A1

公开(公告)日：2017-08-17

申请号：US15434453

申请日：2017-02-16

Applicant: DENSO CORPORATION ,  NATIONAL UNIVERSITY CORP. OITA UNIVERSITY

Inventor： Masaya TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Kimihiro NISHIJIMA

IPC: H02M1/08 ,  H02M3/158

CPC classification number: H02M1/083 ,  H02M3/158 ,  H02M3/1588 ,  H02M2001/0058 ,  Y02B70/1466 ,  Y02B70/1491

Abstract: In a power converter, switch-off of the synchronous rectification switch while the auxiliary switch is on causes the first capacitance of the main switch and the second capacitance of the synchronous rectification switch to resonate with the inductance of the second magnetic component. A parameter obtainer detects a voltage across a selected one of the main switch and the synchronous rectification switch, and obtains a parameter indicative of a corresponding one of rising and falling waveforms of the voltage across the selected switch while the selected switch is switched. A controller controls a switching control signal for the auxiliary switch to adjust switch-on timing of the auxiliary switch as a function of the parameter obtained by the parameter obtainer.

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.

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.

公开(公告)号：US20240006923A1

公开(公告)日：2024-01-04

申请号：US18369490

申请日：2023-09-18

Applicant: DENSO CORPORATION

Inventor： Mitsuru SHIBANUMA ,  Masaya TAKAHASHI ,  Eisuke TAKAHASHI ,  Nobuhisa YAMAGUCHI

IPC: H02J50/12 ,  H02J50/40 ,  H02J1/02

CPC classification number: H02J50/12 ,  H02J50/40 ,  H02J1/02

Abstract: A power transmission apparatus supplies power to a power reception apparatus without contact therebetween. The power transmission apparatus includes: a power conversion unit that outputs an alternating-current voltage of a predetermined frequency; a power transmission unit that has a power transmission coil and a capacitor that is connected to the power transmission coil; a transmission line that connects the power conversion unit and the power transmission unit; and a compensator that is disposed between the power conversion unit and the transmission line. The compensator includes: an inductive reactance element that has an inductive reactance that is greater than an inductive reactance of the transmission line; and a capacitor that reduces an inductive reactance that is a sum of an inductive reactance of the transmission line and an inductive reactance of the inductive reactance element. The inductive reactance element and the capacitor are connected.