公开(公告)号：US20220149666A1

公开(公告)日：2022-05-12

申请号：US17585195

申请日：2022-01-26

Applicant: DENSO CORPORATION ,  The University of Tokyo

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

IPC: H02J50/50 ,  H02J50/12 ,  H02J50/00 ,  B60C19/00 ,  B60L53/122

Abstract: A dynamic wireless power transfer system includes a power transmission coil, a power transmission circuit, a power reception coil, a power reception circuit, and a relay circuit. The power transmission coil is provided in a road. The power transmission circuit supplies electric power to the power transmission coil. The power reception coil is provided in a vehicle. The power reception circuit is connected to the power reception coil. The relay circuit transfers electric power between the power transmission coil and the power reception coil in a contactless manner.

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

IPC: H02J50/40 ,  H02J50/10 ,  H01F27/36 ,  H01F27/245 ,  B60L5/42 ,  E01F11/00

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.

公开(公告)号：US20210143684A1

公开(公告)日：2021-05-13

申请号：US17150351

申请日：2021-01-15

Applicant: DENSO CORPORATION

Inventor： Hayato SUMIYA ,  Eisuke TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Kazuyoshi OBAYASHI ,  Shimpei TAKITA ,  Koji MAZAKI ,  Mitsuru SHIBANUMA ,  Masaki KANESAKI ,  Takuya KIGUCHI ,  Kazuhiro UDA

IPC: H02J50/70 ,  H02J50/90 ,  H02J50/00 ,  H02J50/40

Abstract: A contactless power feeding apparatus includes a plurality of primary coils mounted on a road and a power feed controller which uses a portion of the primary coils as a power transmitting coil to achieve delivery of electrical power from the power transmitting coil to a secondary coil mounted in a vehicle. The power feed controller uses a selected primary coil that is one of the primary coils other than the power transmitting coil to decrease a leakage of magnetic flux arising from excitation of the power transmitting coil. Instead of the selected primary coil, the secondary coil may be used to reduce the leakage of magnetic flux.

公开(公告)号：US20220149664A1

公开(公告)日：2022-05-12

申请号：US17583822

申请日：2022-01-25

Applicant: DENSO CORPORATION

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

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

Abstract: A contactless power feeding device that supplies electric power to a power receiving device without contact includes: a power transmitting circuit that transmits alternating-current power; and a power transmitting resonator including a power transmitting coil. The input impedance of the power transmitting resonator is set low in a facing state in which a power receiving coil included in the power receiving device faces the power transmitting coil, and the input impedance of the power transmitting resonator is set high in a non-facing state in which the power receiving coil does not face the power transmitting coil.

公开(公告)号：US20220072965A1

公开(公告)日：2022-03-10

申请号：US17528718

申请日：2021-11-17

Applicant: DENSO CORPORATION

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

IPC: B60L53/12 ,  H02J50/12 ,  H02J50/40 ,  H02J50/90 ,  B60L53/60 ,  G01R31/52

Abstract: In a moving-object power supply system, a control unit selects, as a power transmission segment, one of segments included in at least one power transmission section. The control unit supplies, through a power supply circuit, power to the power transmission segment to thereby generate a magnetic field through a power transmission coil of the power transmission segment. The control unit determines, based on an ascertained first electrical characteristic of the power transmission segment and an ascertained second electrical characteristic of at least one power non-transmission segment, whether there is a malfunction in each of the power transmission segment and the at least one power non-transmission segment.

公开(公告)号：US20250149926A1

公开(公告)日：2025-05-08

申请号：US19011773

申请日：2025-01-07

Applicant: DENSO CORPORATION

Inventor： Hayato SUMIYA ,  Eisuke Takahashi ,  Nobuhisa Yamaguchi ,  Kazuyoshi Obayashi ,  Shimpei Takita ,  Koji Mazaki ,  Mitsuru Shibanuma ,  Masaki Kanesaki ,  Takuya Kiguchi ,  Kazuhiro Uda

IPC: H02J50/70 ,  H02J50/00 ,  H02J50/40 ,  H02J50/90

Abstract: A contactless power feeding apparatus includes a plurality of primary coils mounted on a road and a power feed controller which uses a portion of the primary coils as a power transmitting coil to achieve delivery of electrical power from the power transmitting coil to a secondary coil mounted in a vehicle. The power feed controller uses a selected primary coil that is one of the primary coils other than the power transmitting coil to decrease a leakage of magnetic flux arising from excitation of the power transmitting coil. Instead of the selected primary coil, the secondary coil may be used to reduce the leakage of magnetic flux.

公开(公告)号：US20230331102A1

公开(公告)日：2023-10-19

申请号：US18214342

申请日：2023-06-26

Applicant: DENSO CORPORATION ,  THE UNIVERSITY OF TOKYO ,  BRIDGESTONE CORPORATION

Inventor： Hayato SUMIYA ,  Shimpei TAKITA ,  Kazuhiro UDA ,  Eisuke TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Hiroshi FUJIMOTO ,  Osamu SHIMIZU ,  Yasumichi WAKAO ,  Isao KUWAYAMA

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

CPC classification number: B60L53/12 ,  H02J50/12 ,  H02J50/50 ,  H02J50/005

Abstract: A power reception apparatus is installable in a vehicle and configured to receive electric power from a power transmission coil embedded in the ground. The power reception apparatus includes: a relay coil that is arranged on a tired wheel, which includes a tire and a wheel, and includes a first coil and a second coil; a power reception coil; and a power reception circuit. The first coil and the second coil are connected with each other by an electrical conductor. The first coil is arranged inside the tire. The second coil is located so that a distance from a central axis of the tired wheel to the second coil is shorter than a distance from the central axis to the first coil. The power reception coil is located so that when the first coil faces the power transmission coil, the power reception coil faces the second coil.

公开(公告)号：US20220001753A1

公开(公告)日：2022-01-06

申请号：US17476073

申请日：2021-09-15

Applicant: DENSO CORPORATION

Inventor： Eisuke TAKAHASHI ,  Hayato SUMIYA ,  Takuya KIGUCHI ,  Nobuhisa YAMAGUCHI

IPC: B60L50/16 ,  B60L53/12 ,  H02J50/12

Abstract: A system for power feeding during traveling includes a coil for power transmission, a power supply unit which supplies power to the coils, at least one shielding member which shields an electromagnetic field of the coil, and a hole provided to the shielding members.

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：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.