Patents by Inventor Mitsuru SHIBANUMA
Mitsuru SHIBANUMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250055323Abstract: 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.Type: ApplicationFiled: October 30, 2024Publication date: February 13, 2025Applicant: DENSO CORPORATIONInventors: Masaya TAKAHASHI, Mitsuru SHIBANUMA, Yusei NAKAYASHIKI, Eisuke TAKAHASHI, Kazuyoshi OBAYASHI, Nobuhisa YAMAGUCHI
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Patent number: 12224598Abstract: 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.Type: GrantFiled: August 10, 2023Date of Patent: February 11, 2025Assignee: DENSO CORPORATIONInventors: Masaya Takahashi, Mitsuru Shibanuma, Kazuyuki Kato, Yusei Nakayashiki, Eisuke Takahashi, Nobuhisa Yamaguchi
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Patent number: 12160115Abstract: A period for performing pre-power-supply check prior to main power supply from a power supply device to a power reception device is provided and, a power-receiving-side controller is configured to: check a supplied electric power supplied from the power supply device to the power reception device, in a state where an effective value of an output voltage of a inverter circuit is fixed to a predetermined first voltage by the power-supply-side controller and an input voltage of the DC-DC converter is fixed to a predetermined second voltage by the power-receiving-side controller, in the pre-power-supply check, and cause, in response to the supplied electric power being equal to a predetermined electric power or more, the power supply device to start the main power supply.Type: GrantFiled: November 26, 2021Date of Patent: December 3, 2024Assignee: DENSO CORPORATIONInventors: Mitsuru Shibanuma, Masaki Kanesaki, Nobuhisa Yamaguchi
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Patent number: 12151570Abstract: 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.Type: GrantFiled: December 9, 2022Date of Patent: November 26, 2024Assignee: DENSO CORPORATIONInventors: Mitsuru Shibanuma, Masaya Takahashi, Eisuke Takahashi, Nobuhisa Yamaguchi
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Patent number: 12115872Abstract: A contactless power supply system is provided for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle. The contactless power supply system includes a plurality of primary coils installed along a traveling direction in a road and a secondary coil mounted to the vehicle. Each of the primary coils is a single-phase coil with the secondary coil being a multi-phase coil, or is a multi-phase coil with the secondary coil being a single-phase coil.Type: GrantFiled: December 28, 2020Date of Patent: October 15, 2024Assignee: DENSO CORPORATIONInventors: Eisuke Takahashi, Nobuhisa Yamaguchi, Koji Mazaki, Shimpei Takita, Hayato Sumiya, Masaki Kanesaki, Takuya Kiguchi, Kazuhiro Uda, Mitsuru Shibanuma, Kazuyoshi Obayashi, Tomoyuki Fujikawa, Masaya Takahashi, Yusei Nakayashiki
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Patent number: 12095287Abstract: 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.Type: GrantFiled: August 30, 2021Date of Patent: September 17, 2024Assignee: DENSO CORPORATIONInventors: 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
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Patent number: 12017543Abstract: 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.Type: GrantFiled: October 19, 2021Date of Patent: June 25, 2024Assignee: DENSO CORPORATIONInventors: Masaki Kanesaki, Mitsuru Shibanuma, Hayato Sumiya, Takuya Kiguchi, Eisuke Takahashi, Shinpei Takita, Masaya Takahashi, Kazuhiro Uda, Yuusei Nakayashiki, Kazuyoshi Obayashi, Nobuhisa Yamaguchi
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Publication number: 20240106276Abstract: A wireless power supply system includes a plurality of power transmission units that receives and supplies power to a power receiving unit via the power transmission coil in a resonance state, and a switching control unit that switches a state of a first power transmission unit to a resonance state when the magnitude of the magnetic flux generated in a first power transmission coil of the first power transmission unit, which is one of the plurality of power transmission units, is greater than a predetermined threshold value, and switches to a non-resonance state when the magnitude is less than the threshold value. The threshold is set as a magnitude that exceeds the magnetic flux generated in the first power transmission coil due to coupling between the first power transmission coil and a second power transmission coil of a second power transmission unit, which is adjacent to first power transmission coil.Type: ApplicationFiled: November 30, 2023Publication date: March 28, 2024Applicant: DENSO CORPORATIONInventors: Mitsuru SHIBANUMA, Eisuke TAKAHASHI, Masaya TAKAHASHI, Nobuhisa YAMAGUCHI, Kazuyuki KATO
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Patent number: 11926227Abstract: 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.Type: GrantFiled: November 17, 2021Date of Patent: March 12, 2024Assignee: DENSO CORPORATIONInventors: Kouji Mazaki, Nobuhisa Yamaguchi, Eisuke Takahashi, Mitsuru Shibanuma, Shinpei Takita, Masaya Takahashi, Hayato Sumiya, Masaki Kanesaki, Takuya Kiguchi, Kazuhiro Uda, Yuusei Nakayashiki
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Publication number: 20240006923Abstract: 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.Type: ApplicationFiled: September 18, 2023Publication date: January 4, 2024Applicant: DENSO CORPORATIONInventors: Mitsuru SHIBANUMA, Masaya TAKAHASHI, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI
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Publication number: 20230396100Abstract: 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.Type: ApplicationFiled: August 17, 2023Publication date: December 7, 2023Applicant: DENSO CORPORATIONInventors: Masaya TAKAHASHI, Mitsuru SHIBANUMA, Kazuyuki KATO, Yusei NAKAYASHIKI, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI
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Publication number: 20230387723Abstract: 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.Type: ApplicationFiled: August 10, 2023Publication date: November 30, 2023Applicant: DENSO CORPORATIONInventors: Masaya TAKAHASHI, Mitsuru SHIBANUMA, Kazuyuki KATO, Yusei NAKAYASHIKI, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI
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Publication number: 20230110224Abstract: 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.Type: ApplicationFiled: December 9, 2022Publication date: April 13, 2023Applicant: DENSO CORPORATIONInventors: Mitsuru SHIBANUMA, Masaya TAKAHASHI, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI
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Publication number: 20220203848Abstract: 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.Type: ApplicationFiled: March 18, 2022Publication date: June 30, 2022Applicant: DENSO CORPORATIONInventors: Kouji MAZAKI, Nobuhisa YAMAGUCHI, Mitsuru SHIBANUMA
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Publication number: 20220085658Abstract: A period for performing pre-power-supply check prior to main power supply from a power supply device to a power reception device is provided and, a power-receiving-side controller is configured to: check a supplied electric power supplied from the power supply device to the power reception device, in a state where an effective value of an output voltage of a inverter circuit is fixed to a predetermined first voltage by the power-supply-side controller and an input voltage of the DC-DC converter is fixed to a predetermined second voltage by the power-receiving-side controller, in the pre-power-supply check, and cause, in response to the supplied electric power being equal to a predetermined electric power or more, the power supply device to start the main power supply.Type: ApplicationFiled: November 26, 2021Publication date: March 17, 2022Applicant: DENSO CORPORATIONInventors: Mitsuru SHIBANUMA, Masaki KANESAKI, Nobuhisa YAMAGUCHI
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Publication number: 20220072965Abstract: 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.Type: ApplicationFiled: November 17, 2021Publication date: March 10, 2022Applicant: DENSO CORPORATIONInventors: Kouji MAZAKI, Nobuhisa YAMAGUCHI, Eisuke TAKAHASHI, Mitsuru SHIBANUMA, Shinpei TAKITA, Masaya TAKAHASHI, Hayato SUMIYA, Masaki KANESAKI, Takuya KIGUCHI, Kazuhiro UDA, Yuusei NAKAYASHIKI
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Publication number: 20220032778Abstract: 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.Type: ApplicationFiled: October 19, 2021Publication date: February 3, 2022Applicant: DENSO CORPORATIONInventors: Masaki KANESAKI, Mitsuru SHIBANUMA, Hayato SUMIYA, Takuya KIGUCHI, Eisuke TAKAHASHI, Shinpei TAKITA, Masaya TAKAHASHI, Kazuhiro UDA, Yuusei NAKAYASHIKI, Kazuyoshi OBAYASHI, Nobuhisa YAMAGUCHI
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Publication number: 20210391757Abstract: 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.Type: ApplicationFiled: August 30, 2021Publication date: December 16, 2021Applicant: DENSO CORPORATIONInventors: 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
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Publication number: 20210143684Abstract: 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.Type: ApplicationFiled: January 15, 2021Publication date: May 13, 2021Applicant: DENSO CORPORATIONInventors: Hayato SUMIYA, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI, Kazuyoshi OBAYASHI, Shimpei TAKITA, Koji MAZAKI, Mitsuru SHIBANUMA, Masaki KANESAKI, Takuya KIGUCHI, Kazuhiro UDA
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Publication number: 20210114465Abstract: A contactless power supply system is provided for supplying electric power to a vehicle in a contactless manner during traveling of the vehicle. The contactless power supply system includes a plurality of primary coils installed along a traveling direction in a road and a secondary coil mounted to the vehicle. Each of the primary coils is a single-phase coil with the secondary coil being a multi-phase coil, or is a multi-phase coil with the secondary coil being a single-phase coil.Type: ApplicationFiled: December 28, 2020Publication date: April 22, 2021Applicant: DENSO CORPORATIONInventors: Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI, Koji MAZAKI, Shimpei TAKITA, Hayato SUMIYA, Masaki KANESAKI, Takuya KIGUCHI, Kazuhiro UDA, Mitsuru SHIBANUMA, Kazuyoshi OBAYASHI, Tomoyuki FUJIKAWA, Masaya TAKAHASHI, Yusei NAKAYASHIKI