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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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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：US20190089267A1
公开(公告)日：2019-03-21
申请号：US16135039
申请日：2018-09-19
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Masaki KANESAKI , Shoichi TAKEMOTO
IPC: H02M7/538 , H02M7/5387 , H02M7/487
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.
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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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Patent Agency Ranking
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
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.
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公开(公告)号：US20220203848A1
公开(公告)日：2022-06-30
申请号：US17698010
申请日：2022-03-18
Applicant: DENSO CORPORATION
Inventor： Kouji MAZAKI , Nobuhisa YAMAGUCHI , Mitsuru SHIBANUMA
IPC: B60L53/122 , H02J50/12 , H02J50/40 , H02J50/90 , H02J50/00
Abstract: A vehicle power supply system is configured to supply power to a vehicle from a power supply apparatus laid on a power supply lane of a vehicle travel path, the power supply apparatus includes a plurality of power supply segments laid in a preset interval along the power supply lane, and a controller configured to control the plurality of power supply segments. The controller is configured to estimate timing of the vehicle reaching a next power supply segment that supplies power next after a present power supply segment that is supplying power, from at least a vehicle velocity derived from a change in position of the vehicle, and cause the next power supply segment to start power supply at the timing estimated.
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公开(公告)号：US20220037928A1
公开(公告)日：2022-02-03
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
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.
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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
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.
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公开(公告)号：US20200153342A1
公开(公告)日：2020-05-14
申请号：US16745918
申请日：2020-01-17
Applicant: DENSO CORPORATION
Inventor： Masaya TAKAHASHI , Nobuhisa YAMAGUCHI , Masaki KANESAKI , Shoichi TAKEMOTO
IPC: H02M3/337 , H02M3/335 , H02M7/5395
Abstract: A power inversion apparatus includes a smoothing capacitor, first and second primary coils, a secondary coil, first to fourth switches of bridge circuit switches, a clamp capacitor, and a switch controller. The switch controller calculates a lower-arm duty ratio of each of the first and second switches using a map or a mathematical expression by feed-forward control based on an input voltage. The switch controller outputs a fixed value that is equal to or greater than a maximum value of the lower-arm duty ratio within a variation range of the input voltage as an upper-arm duty ratio of each of the third and fourth switches. The switch controller generates a pulse width modulation signal based on the calculated lower-arm duty ratio and the fixed value of the upper-arm duty ratio, and outputs the pulse width modulation signal to the bridge circuit switches.
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