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.

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

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

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：US20220302766A1

公开(公告)日：2022-09-22

申请号：US17837583

申请日：2022-06-10

Applicant: DENSO CORPORATION

Inventor： Yuusei NAKAYASHIKI ,  Masaya TAKAHASHI

IPC: H02J50/50 ,  H02J50/12 ,  H02J50/05 ,  H02J50/40

Abstract: A contactless power supply system includes: a power transmitter including a first capacitor and a power transmission coil, and having a first resonant frequency; a power receiver including a second capacitor and a power reception coil, and having a second resonant frequency; and a repeater that transmits, to the power reception coil, AC power received from the power transmission coil. The repeater may include: a relay power reception coil unit that receives AC power and includes at least one coil that defines a first stray capacitance for forming a first self-resonant frequency having a frequency identical to the first resonant frequency; and a relay power transmission coil unit that transmits AC power and includes at least one coil that defines a second stray capacitance for forming a second self-resonant frequency having a frequency identical to the second resonant frequency.

公开(公告)号：US20220320909A1

公开(公告)日：2022-10-06

申请号：US17842992

申请日：2022-06-17

Applicant: DENSO CORPORATION

Inventor： Yuusei NAKAYASHIKI ,  Masaya TAKAHASHI ,  Eisuke TAKAHASHI ,  Nobuhisa YAMAGUCHI

IPC: H02J50/12 ,  H02J50/40 ,  H01F38/14 ,  H02J50/70

Abstract: In a wireless power transfer apparatus, a characteristic adjuster has a frequency characteristic that causes, in a power transfer mode from at least one power transmission unit to a power receiving apparatus, a resonant power transmission circuit to have a resonance frequency that substantially matches an operating frequency. The reactance of a power transmission coil has a reference value in the power transfer mode. The frequency characteristic of the characteristic adjuster causes, in a power non-transfer mode from the at least one power transmission unit to the power receiving apparatus, a reactance of a power transmission coil to become an adjusted value that is higher than the reference value.

公开(公告)号：US20220032778A1

公开(公告)日：2022-02-03

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

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.