公开(公告)号：US11984735B2

公开(公告)日：2024-05-14

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 ,  B60C9/00 ,  B60C19/00 ,  B60L53/122 ,  H02J50/00 ,  H02J50/12

CPC classification number: H02J50/50 ,  B60C19/00 ,  B60L53/122 ,  H02J50/005 ,  H02J50/12 ,  B60C9/0007

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：US11984733B2

公开(公告)日：2024-05-14

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 ,  B60L50/53 ,  H02J50/50 ,  H04B5/00

CPC classification number: H02J50/12 ,  B60L50/53 ,  H02J50/50 ,  H04B5/0037 ,  H04B5/0081

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：US10862336B2

公开(公告)日：2020-12-08

申请号：US15516336

申请日：2016-01-27

Applicant: DENSO CORPORATION

Inventor： Kazuyoshi Obayashi ,  Akira Kamiya ,  Eisuke Takahashi

IPC: H02J50/12 ,  B60L53/122 ,  H02J50/80 ,  H02J7/00

Abstract: A non-contact power supply device includes: a power transmission coil that generates a magnetic flux by an alternating current; a power transmission circuit that supplies the alternating current to the power transmission coil; a power transmission side control circuit that controls the power transmission circuit; a power receiving coil that generates an alternating current by interlinking the magnetic flux generated in the power transmission coil; and a power receiving circuit that converts the alternating current supplied from the power receiving coil into a direct current, and supplies the direct current to the power supply target. The power transmission side control circuit obtains a voltage vector target value based on a relationship between a voltage vector and a current vector, and controls the power transmission circuit to set the voltage vector of the alternating current output from the power transmission circuit to be the voltage vector target value.

公开(公告)号：US10230269B2

公开(公告)日：2019-03-12

申请号：US15121926

申请日：2015-03-02

Applicant: DENSO CORPORATION

Inventor： Eisuke Takahashi ,  Kazuyoshi Obayashi ,  Kouji Mazaki ,  Takuro Tsutsui

IPC: H02J7/02 ,  H01F38/14 ,  H02J50/10 ,  H04B5/00 ,  B60L11/18 ,  H02J50/12 ,  H02J50/80 ,  H02J7/00 ,  H02J17/00 ,  H02J50/90 ,  B60M7/00

Abstract: A contactless power supply system includes: a power supply pad including a power supply core formed of a magnetic material, and a power supply coil that uses the power supply core as a magnetic path; and a filter circuit including an inductor coil, the filter circuit being connected to the power supply pad. The power supply pads to which the respective filter circuits are connected are brought into a face-to-face relation so that electric power is transmitted from one power supply pad to the other power supply pad in a contactless manner. An inductor coil of at least either one of the filter circuits is provided to the power supply core of the power supply pad to which the filter circuit is connected, and the inductor coil uses the power supply core as a magnetic path.

公开(公告)号：US10090752B2

公开(公告)日：2018-10-02

申请号：US15855168

申请日：2017-12-27

Applicant: DENSO CORPORATION

Inventor： Masaya Takahashi ,  Eisuke Takahashi ,  Takuya Kiguchi

IPC: G05F1/00 ,  H02M1/08 ,  H02M7/5387 ,  H02J7/00 ,  H02P27/08 ,  H02M1/00 ,  H02M7/48

Abstract: A power conversion device has a main switch connected to a positive electrode side line of a battery, at least one semiconductor power element connected between the main switch and a negative electrode voltage line, and an auxiliary circuit having an auxiliary switch, a resonance reactor and an auxiliary diode connected parallel to the main switch. The device further has a voltage detection part which detects an external side voltage of the main switch and a control circuit part performing a switching control of the main switch and the auxiliary switch based on the detection result of the voltage detection part. During the turned-off state of the main switch, the control circuit part turns off the auxiliary switch before the external side voltage of the main switch reaches an input voltage of the main switch. This external side voltage starts to increase when the auxiliary switch is turned on.

公开(公告)号：US12224598B2

公开(公告)日：2025-02-11

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

IPC: H02J50/12 ,  B60L53/39 ,  H02J50/40 ,  H02J50/90

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.

公开(公告)号：US12151570B2

公开(公告)日：2024-11-26

申请号：US18078306

申请日：2022-12-09

Applicant: DENSO CORPORATION

Inventor： Mitsuru Shibanuma ,  Masaya Takahashi ,  Eisuke Takahashi ,  Nobuhisa Yamaguchi

IPC: B60L53/122 ,  B60L5/00 ,  H02J50/12 ,  H02J50/40 ,  H02J50/70 ,  H02J50/90

Abstract: A coil unit for a contactless power supply system includes a plurality of coils for electric power transfer, and a magnetic flux reduction structure. The plurality of coils include a first coil and a second coil adjacent to the first coil in a predetermined direction. The magnetic flux reduction structure reduces, during electric power transfer using the first coil, magnetic flux by which the first coil causes an induced voltage or induced current to be generated in the second coil.

公开(公告)号：US12017543B2

公开(公告)日：2024-06-25

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 ,  H02J50/40

CPC classification number: B60L3/0046 ,  B60R16/033 ,  B60L2240/54 ,  H02J50/402

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：US10807547B2

公开(公告)日：2020-10-20

申请号：US15429801

申请日：2017-02-10

Applicant: DENSO CORPORATION

Inventor： Kazuyoshi Obayashi ,  Eisuke Takahashi

IPC: B60R16/033 ,  H02J7/00 ,  F02N11/10 ,  F02N11/08 ,  F02D41/00 ,  F02B39/10

Abstract: A power supply apparatus configures an on-board power supply system that includes a first battery and a second battery. A first module and a first detecting unit are electrically connected to the first battery as a first electrical load. A second module and a second detecting unit are electrically connected to the second battery as a second electrical load. The first module and the second module configure an electric power steering apparatus. A starter is electrically connected to the first battery. The first battery and the second battery are electrically connected by a connection path. A resistor unit is provided on the connection path.

公开(公告)号：US09960678B2

公开(公告)日：2018-05-01

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.