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.

公开(公告)号：US20230396100A1

公开(公告)日：2023-12-07

申请号：US18235168

申请日：2023-08-17

Applicant: DENSO CORPORATION

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

IPC: H02J50/12 ,  H02J7/00 ,  H02J50/70 ,  H02J50/40

CPC classification number: H02J50/12 ,  H02J7/00712 ,  H02J50/402 ,  H02J7/0047 ,  H02J50/70

Abstract: A primary-side resonant circuit of a power transmission apparatus has an impedance varying element that increases, when supply of electric power is stopped, an input impedance of the primary-side resonant circuit so as to have predetermined standby current flowing through a primary-side coil. A power reception apparatus includes a magnetic flux amplifier circuit configured to amplify magnetic flux generated by the standby current flowing through the primary-side coil of the primary-side resonant circuit. The power transmission apparatus further includes a primary-side detection circuit configured to detect a change in the voltage of the primary-side coil, a change in electric current flowing through the primary-side coil or a change in a magnetic field in the vicinity of the primary-side coil; each of the changes is caused by the magnetic flux amplified by the magnetic flux amplifier circuit.

公开(公告)号：US20230387723A1

公开(公告)日：2023-11-30

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 ,  H02J50/90 ,  H02J50/40 ,  B60L53/39

CPC classification number: H02J50/12 ,  H02J50/90 ,  H02J50/40 ,  B60L53/39

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：US20230341478A1

公开(公告)日：2023-10-26

申请号：US18214702

申请日：2023-06-27

Applicant: DENSO CORPORATION

Inventor： Kazuyoshi OBAYASHI ,  Nobuhisa YAMAGUCHI

IPC: G01R33/00

CPC classification number: G01R33/0017

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：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：US20130082516A1

公开(公告)日：2013-04-04

申请号：US13627038

申请日：2012-09-26

Applicant: DENSO CORPORATION

Inventor： Nobuhisa YAMAGUCHI

IPC: H02J4/00

CPC classification number: H02J4/00 ,  H04B3/548 ,  H04B2203/5475

Abstract: In a signal and power transmission system, a primary coil and a secondary coil magnetically coupled to the primary coil and connected to an electrical path are provided. An encoder encodes a target signal to be transmitted to produce a pulse code signal, and a voltage applying unit applies a voltage signal based on the pulse code signal to the primary coil as an input voltage signal. A decoder decodes an output voltage signal induced in the secondary coil using a variation in the output voltage signal into a decoded signal corresponding to the target signal. The output voltage signal is induced in the secondary coil based on the input voltage signal. A rectifier rectifies a current flowing through the electrical path connected to the secondary coil according to the output voltage signal induced in the secondary coil, thus outputting a rectified current as power.

Abstract translation: 在信号和电力传输系统中，提供了与初级线圈磁耦合并连接到电路径的初级线圈和次级线圈。 编码器对要发送的目标信号进行编码以产生脉冲编码信号，并且电压施加单元将基于脉冲编码信号的电压信号作为输入电压信号施加到初级线圈。 解码器使用输出电压信号的变化将在次级线圈中感应的输出电压信号解码成对应于目标信号的解码信号。 输出电压信号根据输入电压信号在次级线圈中感应出来。 整流器根据次级线圈中感应的输出电压信号对流过连接到次级线圈的电路的电流进行整流，从而输出整流电流作为功率。

公开(公告)号：US20250141272A1

公开(公告)日：2025-05-01

申请号：US19004614

申请日：2024-12-30

Applicant: DENSO CORPORATION

Inventor： Masaki KANESAKI ,  Masaya TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Kazuyoshi OBAYASHI

IPC: H02J50/12 ,  H02J50/40 ,  H02J50/80

Abstract: A power transmission device for wireless power supply to a mobile power receiving device has an edge coil unit that includes an edge resonance circuit, the edge resonance circuit including an edge coil and an edge resonance capacitors; an edge current switching unit; an edge transmission request signal receiving unit; an edge transmission control unit; an adjacent coil unit that adjacent to the edge coil unit and includes an adjacent resonance circuit; the adjacent resonance circuit including an adjacent coil and an adjacent resonance capacitor; and an adjacent current switching unit for switching on and off state of the power supply from the power source to the adjacent resonance circuit; and an adjacent transmission control unit that controls the on and off state of the power supply from the power source to the adjacent resonance circuit using the adjacent current switching unit.

公开(公告)号：US20250105671A1

公开(公告)日：2025-03-27

申请号：US18974060

申请日：2024-12-09

Applicant: DENSO CORPORATION

Inventor： Masaya TAKAHASHI ,  Yusei NAKAYASHIKI ,  Mitsuru SHIBANUMA ,  Nobuhisa YAMAGUCHI

IPC: H02J50/12 ,  H02J50/70

Abstract: A power output circuit includes a plurality of circuit blocks that are provided in power wirings to which power is inputted and connected to each other side by side. Each of the plurality of circuit blocks includes at least a filter in a last post-stage. Each of the plurality of filters includes a reactor and a capacitor connected to the reactor at a node differing from an output node. Either of the reactor and the capacitor provided in each of the plurality of filters is connected to the power wirings in series so as to connect with the output node. A connection line between the reactor and the capacitor in one filter is connected to a connection line between the reactor and the capacitor in the remaining other filter.