公开(公告)号：US20250065750A1

公开(公告)日：2025-02-27

申请号：US18947183

申请日：2024-11-14

Applicant: DENSO CORPORATION ,  The University of Tokyo

Inventor： Hayato SUMIYA ,  Eisuke TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Hiroshi FUJIMOTO ,  Osamu SHIMIZU

IPC: B60L53/62 ,  B60L53/12 ,  B60L53/30 ,  H02J50/00 ,  H02J50/12 ,  H02J50/50

Abstract: A power supply apparatus includes a power reception coil mounted to a moving object, a plurality of relay coils, and a power reception circuit connected with the power reception coil. The relay coils are configured to successively relay supply of electric power from a power transmission coil, which is arranged along a surface on which the moving object moves, to the power reception coil during movement of the moving object. Each of the relay coils includes a first coil and a second coil, which are configured to be magnetic-field-coupled respectively to the power transmission coil and the power reception coil, and a connection circuit that connects the first and second coils. The connection circuit includes at least one resonance capacitor involved in setting of a resonance frequency of at least one of the first and second coils. The at least one resonance capacitor has a parallel characteristic.

公开(公告)号：US20250062646A1

公开(公告)日：2025-02-20

申请号：US18935885

申请日：2024-11-04

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Mitsuru SHIBANUMA ,  Kazuyoshi OBAYASHI ,  Nobuhisa YAMAGUCHI ,  Sungmin CHO ,  Katsuya KOBAYASHI ,  Toshiya HASHIMOTO

IPC: H02J50/90 ,  H02J7/00 ,  H02J50/12 ,  H02J50/40 ,  H02J50/80

Abstract: A wireless power transfer system comprises: a power conversion unit generating power to be transmitted to a power reception coil; a power transmission unit group constituted by two or more power transmission units, each power transmission unit having a power transmission circuit including a power transmission coil; a control unit controlling supply of power from the power conversion unit to the power transmission unit group; and a position detection unit detecting a position of a mobile body. The control unit, based on position information, supplies power from the power conversion unit to a power transmission unit group that satisfies a power transmission condition including that a distance of the power transmission coil relative to the power reception coil of the mobile body is less than or equal to a predetermined threshold, and does not supply power to a power transmission unit group that does not satisfy the power transmission condition.

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：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

IPC: H02J50/40 ,  H02J50/00 ,  H02J50/12 ,  H02J50/70

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.

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：US20210336487A1

公开(公告)日：2021-10-28

申请号：US17368990

申请日：2021-07-07

Applicant: DENSO CORPORATION

Inventor： Norihito KIMURA ,  Eisuke TAKAHASHI ,  Masaki KANESAKI ,  Nobuhisa YAMAGUCHI

IPC: H02J50/12 ,  B60L53/12 ,  H02J50/40 ,  H02J50/90

Abstract: A power receiving device installable to a vehicle and included in a contactless power supply system for supplying power in a contactless manner between the power receiving device and a power transmission device installable on a road includes: polyphase receiver coils having at least three phases; an iron core that provides magnetic flux coupling between the receiver coils for the respective phases; and receiver capacitors connected on a one-to-one basis to the receiver coils for the respective phases. The receiver coils for the respective phases are arranged to have inter-coil distances between the receiver coils, with at least one of the inter-coil distances different from the other inter-coil distances. The receiver capacitors have capacitances set based on the inter-coil distances.

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：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.