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公开(公告)号：US20240097496A1
公开(公告)日：2024-03-21
申请号：US18522429
申请日：2023-11-29
Applicant: DENSO CORPORATION
Inventor： Yusei NAKAYASHIKI , Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Eisuke TAKAHASHI
IPC: H02J50/12 , B60L53/122 , B60L53/62 , H02J50/90
CPC classification number: H02J50/12 , B60L53/122 , B60L53/62 , H02J50/90
Abstract: A power supply system includes: a power transmission circuit provided on the ground side; a high frequency generation circuit that supplies high-frequency electric power to the power transmission circuit; a measurement unit that measures a physical quantity corresponding to the degree of coupling between the power transmission circuit and a power reception circuit provided in a vehicle; and a control unit. When the degree of coupling is determined, based on the measured physical quantity, to be lower than a predetermined degree, the control unit sets the impedance of the power transmission circuit to a first impedance and thereby sets the power transmission circuit to a non-resonant state. In contrast, when the degree of coupling is determined to be not lower than the predetermined degree, the control unit sets the impedance of the power transmission circuit to a second impedance and thereby sets the power transmission circuit to a resonant state.
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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
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.
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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
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.
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公开(公告)号：US20230110224A1
公开(公告)日：2023-04-13
申请号：US18078306
申请日：2022-12-09
Applicant: DENSO CORPORATION
Inventor： Mitsuru SHIBANUMA , Masaya TAKAHASHI , Eisuke TAKAHASHI , Nobuhisa YAMAGUCHI
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.
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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
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.
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Patent Agency Ranking
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
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.
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公开(公告)号：US20150380948A1
公开(公告)日：2015-12-31
申请号：US14766676
申请日：2014-02-04
Applicant: DENSO CORPORATION
Inventor： Kouji MAZAKI , Nobuhisa YAMAGUCHI , Keisuke TANI , Eisuke TAKAHASHI , Kazuyoshi OBAYASHI
IPC: H02J5/00
CPC classification number: H02J5/005 , H02J7/025 , H02J50/12 , H02J50/90 , H02M3/158 , H02M3/3353 , H02M7/217 , H02M2001/007
Abstract: A contactless power supply system for transferring power without contact between a primary side coil and a secondary side coil is provided. In the contactless power supply system, a manipulation unit manipulates a secondary side converter so that power outputted to a load is controlled to be a command value. The manipulation unit manipulates an input voltage of a primary side resonance circuit so that a current flowing in the primary side resonance circuit equals a product of a current flowing in the secondary side resonance circuit and a current coefficient. The current coefficient is defined as a square root of a specific value and the specific value is an equivalent resistance of the secondary side resonance circuit divided by an equivalent resistance of the primary side resonance circuit.
Abstract translation: 提供一种用于在初级侧线圈和次级侧线圈之间传递电力而不接触的非接触电源系统。 在非接触供电系统中，操作单元操作次级侧变换器，将输出到负载的功率控制为指令值。 操作单元操纵初级侧谐振电路的输入电压，使得在初级侧谐振电路中流动的电流等于在次级侧谐振电路中流动的电流与电流系数的乘积。 电流系数被定义为特定值的平方根，特定值是次级侧谐振电路的等效电阻除以初级侧谐振电路的等效电阻。
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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.
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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
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.
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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
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.
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