公开(公告)号：US20250118996A1

公开(公告)日：2025-04-10

申请号：US18985471

申请日：2024-12-18

Applicant: DENSO CORPORATION

Inventor： Masaya TAKAHASHI ,  Yusei Nakayashiki ,  Mitsuru Shibanuma ,  Nobuhisa Yamaguchi

IPC: H02J50/12

Abstract: A first power supply unit rectifies, to first DC power, external AC power that is wirelessly received by a power receiving coil using magnetic coupling. The first power supply unit supplies the converted first DC power to one or more loads as main power. A second power supply unit is connected to an input stage of the first power supply unit, and outputs second DC power used for control of the first power supply unit. This makes it possible to stably ensure the second DC power used for control of the first power supply unit even if the one or more loads are configured to receive power from the first power supply unit.

公开(公告)号：US20240424922A1

公开(公告)日：2024-12-26

申请号：US18824349

申请日：2024-09-04

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kazuyoshi OBAYASHI ,  Keisuke Tani ,  Nobuhisa Yamaguchi ,  Masaki Kanesaki ,  Yuichi Takemura ,  Toshiya Hashimoto ,  Shogo Tsuge ,  Ryosuke Ikemura

IPC: B60L53/126 ,  B60L53/122 ,  B60L53/30 ,  B60L53/65 ,  B60L53/66

Abstract: A power transmission apparatus for wireless power transfer to a movable power receiving apparatus includes a power transmission resonator that includes a power transmission coil and a transmission resonance capacitor unit, and a power transmission circuit for supply of alternating-current power to the power transmission resonator. The power transmission apparatus includes a power-transfer request signal receiver configured to receive a power-transfer request signal transmitted from the power receiving apparatus, and a switching unit. The switching unit is configured to, when the power-transfer request signal receiver receives the power-transfer request signal, change an input impedance of the power transmission resonator to change a value of current flowing through the power transmission coil of the power transmission resonator to a controlled value enabled to transfer power from the power transmission coil to the power receiving apparatus.

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：US12160115B2

公开(公告)日：2024-12-03

申请号：US17535836

申请日：2021-11-26

Applicant: DENSO CORPORATION

Inventor： Mitsuru Shibanuma ,  Masaki Kanesaki ,  Nobuhisa Yamaguchi

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

Abstract: A period for performing pre-power-supply check prior to main power supply from a power supply device to a power reception device is provided and, a power-receiving-side controller is configured to: check a supplied electric power supplied from the power supply device to the power reception device, in a state where an effective value of an output voltage of a inverter circuit is fixed to a predetermined first voltage by the power-supply-side controller and an input voltage of the DC-DC converter is fixed to a predetermined second voltage by the power-receiving-side controller, in the pre-power-supply check, and cause, in response to the supplied electric power being equal to a predetermined electric power or more, the power supply device to start the main power supply.

公开(公告)号：US11926227B2

公开(公告)日：2024-03-12

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

CPC classification number: B60L53/12 ,  B60L53/60 ,  G01R31/52 ,  H02J50/12 ,  H02J50/40 ,  H02J50/90

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：US11888326B2

公开(公告)日：2024-01-30

申请号：US17503953

申请日：2021-10-18

Applicant: DENSO CORPORATION

Inventor： Masaya Takahashi ,  Yuusei Nakayashiki ,  Eisuke Takahashi ,  Masaki Kanesaki ,  Kazuhiro Uda ,  Nobuhisa Yamaguchi

IPC: H02J50/12 ,  H02J50/90 ,  B60L53/122 ,  H02M1/12

CPC classification number: H02J50/12 ,  B60L53/122 ,  H02J50/90 ,  H02M1/12

Abstract: A contactless power supply device that supplies electric power to a vehicle in a contactless manner, includes: a power transmission resonance circuit; a power source circuit supplying direct-current power; and a power transmission circuit converting the direct-current power of the power source circuit into alternating-current power and supplying alternating-current power to the power transmission resonance circuit. The power transmission circuit includes: an inverter circuit converting the direct-current power of the power source circuit into alternating-current power; and a power transmission-side immittance conversion circuit adjusting the alternating-current power of the inverter circuit and supplies the adjusted alternating-current power to the power transmission resonance circuit. The ratio of a characteristic impedance of the power transmission-side immittance conversion circuit to an impedance backward on the power transmission resonance circuit side from the power transmission-side immittance conversion circuit is adjusted such that harmonic components in the alternating-current power of the inverter circuit becomes lessened.

公开(公告)号：US10312826B2

公开(公告)日：2019-06-04

申请号：US16135039

申请日：2018-09-19

Applicant: DENSO CORPORATION

Inventor： Masaya Takahashi ,  Nobuhisa Yamaguchi ,  Masaki Kanesaki ,  Shoichi Takemoto

IPC: H02M7/53 ,  H02M7/538 ,  H02M7/5387 ,  H02M7/487 ,  H02M7/483 ,  H02M7/48

Abstract: In a power conversion apparatus, a controller calculates a duty ratio being a ratio of an on-duration of each of bridge-circuit switches configured by first to fourth switches to a switching period, and outputs a gate signal to each of the bridge-circuit switches. The controller adjusts the duty ratio of each of the bridge-circuit switches such that a switch-current difference becomes closer to a value obtained by multiplying an input-current difference by the predetermined target ratio that is a value greater than 0 and less than 1. The switch-current difference is a difference between a first switch current and a second switch current or a difference between a third switch current and a fourth switch current detected by a switch-current sensor at predetermined timings in the switching period. The input-current difference is a difference between input currents detected by an input-current sensor simultaneously with detection timings of switch currents.

公开(公告)号：US12292485B2

公开(公告)日：2025-05-06

申请号：US18214702

申请日：2023-06-27

Applicant: DENSO CORPORATION

Inventor： Kazuyoshi Obayashi ,  Nobuhisa Yamaguchi

IPC: G01R33/00

Abstract: A magnetic detection system is provided which is usable in a movable body including a power receiving system that receives power from a power transmission system by electromagnetic induction. The magnetic detection system includes at least one magnetic flux measuring unit that detects a magnetic flux including a magnetic source magnetic flux from a magnetic source disposed on the ground, and a signal processing unit that suppresses influence of a magnetic flux generated from the power receiving system on the magnetic flux measured by the magnetic flux sensor unit, to detect the magnetic source magnetic flux.

公开(公告)号：US20250135933A1

公开(公告)日：2025-05-01

申请号：US19004801

申请日：2024-12-30

Applicant: DENSO CORPORATION

Inventor： Kazuyoshi OBAYASHI ,  Nobuhisa Yamaguchi ,  Keisuke Tani

IPC: B60L53/36 ,  B60L53/12 ,  H02J50/12 ,  H02J50/40 ,  H02J50/90

Abstract: In a coil position estimating apparatus, a past local-maximum position identifier identifies, from information indicative of how levels of first power received by a power receiving apparatus in the past change over time, at least one local maximum position along a road at which the received power became locally maximum in the past. A power-transmission coil position estimator estimates, based on the identified at least one local maximum position, at least one future local-maximum position as the position of the at least one power transmission coil. The at least one future local-maximum position corresponds to a level of second power to be received by the power receiving apparatus in a forward section of the road from the vehicle; the level of the second power is likely to become locally maximum.

公开(公告)号：US12115872B2

公开(公告)日：2024-10-15

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: B60L53/12 ,  B60L9/00 ,  B60L53/122 ,  B60L53/39 ,  H01F38/14 ,  H02J50/12 ,  H02J50/40

CPC classification number: B60L53/122 ,  B60L9/00 ,  B60L53/12 ,  B60L53/39 ,  H01F38/14 ,  H02J50/12 ,  H02J50/402

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.