Patents by Inventor Eisuke Takahashi
Eisuke Takahashi 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: 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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Publication number: 20240097496Abstract: 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.Type: ApplicationFiled: November 29, 2023Publication date: March 21, 2024Applicant: DENSO CORPORATIONInventors: Yusei NAKAYASHIKI, Masaya TAKAHASHI, Nobuhisa YAMAGUCHI, Eisuke TAKAHASHI
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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: 20240076837Abstract: A facility protection cover is disposed on a concrete foundation and covers a facility device disposed between the facility protection cover and the concrete foundation. The facility protection cover includes a cover body including a fiber-reinforced cement composite. The cover body includes two legs that are spaced apart from each other so as to be located on opposite sides of a facility device placement space. The facility device placement space accommodates the facility device. The cover body includes a bridging portion that bridges the two legs so as to extend over the facility device placement space. The cover body transmits a weight of a vehicle loaded on the cover body to the concrete foundation via the two legs, and restricts a separating relative movement of the two legs along a placement surface of the concrete foundation when the weight of the vehicle is loaded on the bridging portion.Type: ApplicationFiled: September 17, 2021Publication date: March 7, 2024Inventors: Koichi TANAKA, Eisuke TAKAHASHI
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Publication number: 20240072579Abstract: A coil assembly for wireless electrical power transmission includes a plurality of external connecting terminals, a power feeding coil, a resonant capacitor electrically connecting with the power feeding coil, and busbars each of which electrically connects between the external connecting terminals.Type: ApplicationFiled: October 25, 2023Publication date: February 29, 2024Applicant: DENSO CORPORATIONInventors: Shimpei TAKITA, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI, Yusei NAKAYASHIKI
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Patent number: 11888326Abstract: 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.Type: GrantFiled: October 18, 2021Date of Patent: January 30, 2024Assignee: DENSO CORPORATIONInventors: Masaya Takahashi, Yuusei Nakayashiki, Eisuke Takahashi, Masaki Kanesaki, Kazuhiro Uda, Nobuhisa Yamaguchi
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Patent number: 11878539Abstract: A control system is configured such that a carriage that a processing head is mounted is driven by a motor and reciprocates. The motor is controlled by a controller. The controller reciprocates the carriage by selecting a control mode as a target mode based on temperature information related to temperature of the motor and controlling the motor in the target mode. The controller selects the target mode to be applied to the control of the motor for each of particular work units. The target mode is selected from a group of particular control modes. Each control mode in the group of particular control modes is a control mode in which a maximum temperature, which is estimated based on the temperature information, when the control of the motor using the selected control mode would be executed until the processing is completed, is less than a reference value.Type: GrantFiled: March 9, 2022Date of Patent: January 23, 2024Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Masahiro Hoga, Shohei Ichikawa, Satoru Arakane, Eisuke Takahashi
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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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Patent number: 11850952Abstract: 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.Type: GrantFiled: September 15, 2021Date of Patent: December 26, 2023Assignee: DENSO CORPORATIONInventors: Eisuke Takahashi, Hayato Sumiya, Takuya Kiguchi, 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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Patent number: 11813857Abstract: There is provided control system including: movement mechanism configured so that the movement mechanism is driven by motor; detector configured to detect position and speed of the movable member; and controller. The controller is configured to: control the motor so that the movement mechanism reciprocatively moves the movable member; and in a course to move the movable member to a returning point, control the movement of the movable member by controlling the motor based on the speed of the movable member so that the movable member is moved at a constant speed until a deceleration start point of time, and control the movement of the movable member by controlling the motor based on the position of the movable member so that the movable member is decelerated from the deceleration start point of time and stops at the returning point in accordance with a target position locus.Type: GrantFiled: February 23, 2022Date of Patent: November 14, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Eisuke Takahashi, Sachie Kiriyama
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Publication number: 20230331102Abstract: 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.Type: ApplicationFiled: June 26, 2023Publication date: October 19, 2023Applicants: DENSO CORPORATION, THE UNIVERSITY OF TOKYO, BRIDGESTONE CORPORATIONInventors: Hayato SUMIYA, Shimpei TAKITA, Kazuhiro UDA, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI, Hiroshi FUJIMOTO, Osamu SHIMIZU, Yasumichi WAKAO, Isao KUWAYAMA
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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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Patent number: 11586162Abstract: An aspect of this specification discloses a method of, based on a control input to a controlled object and on a control output from the controlled object, updating a value of a parameter in an estimator configured to estimate external force that acts on the controlled object. The method includes: determining whether the controlled object is in a particular state in which external force that acts on the controlled object is known; during a period in which it is determined that the controlled object is in the particular state, calculating, as a learning value, the value of the parameter that reduces an error between the known external force and estimated external force, the estimated external force being estimated by the estimator based on the control input and the control output; and updating the value of the parameter in the estimator with the calculated learning value.Type: GrantFiled: October 30, 2019Date of Patent: February 21, 2023Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventor: Eisuke Takahashi
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Publication number: 20220314671Abstract: A control system is configured such that a carriage that a processing head is mounted is driven by a motor and reciprocates. The motor is controlled by a controller. The controller reciprocates the carriage by selecting a control mode as a target mode based on temperature information related to temperature of the motor and controlling the motor in the target mode. The controller selects the target mode to be applied to the control of the motor for each of particular work units. The target mode is selected from a group of particular control modes. Each control mode in the group of particular control modes is a control mode in which a maximum temperature, which is estimated based on the temperature information, when the control of the motor using the selected control mode would be executed until the processing is completed, is less than a reference value.Type: ApplicationFiled: March 9, 2022Publication date: October 6, 2022Inventors: Masahiro HOGA, Shohei ICHIKAWA, Satoru ARAKANE, Eisuke TAKAHASHI
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Publication number: 20220314666Abstract: In a control system, a controller is configured to determine presence or absence of an obstructed area within the intermediate section, and control movement of the moving body in accordance with a selected one of controlling methods including a first and a second control methods. The first control method causes the moving body to move at a first constant speed in the processing section defined within the intermediate section and at a second constant speed faster than the first constant speed in at least a part of a non-processing section within the intermediate section and other than the processing section, the first control method being selected when the obstructed area is absent. The second control method causes the moving body to move at the first constant speed in the processing section and the non-processing section, the second control method being selected when the obstructed area is present.Type: ApplicationFiled: March 28, 2022Publication date: October 6, 2022Inventors: Satoru ARAKANE, Masahiro HOGA, Shohei ICHIKAWA, Eisuke TAKAHASHI
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Publication number: 20220320909Abstract: 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.Type: ApplicationFiled: June 17, 2022Publication date: October 6, 2022Applicant: DENSO CORPORATIONInventors: Yuusei NAKAYASHIKI, Masaya TAKAHASHI, Eisuke TAKAHASHI, Nobuhisa YAMAGUCHI
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Patent number: 11449031Abstract: A method includes: acquiring time-series data of a control input and a control output; calculating a variable parameter that minimizes an evaluation function, based on observation values of the control input and the control output; and updating the variable parameter with the calculated variable parameter. The evaluation function includes: a first function part that evaluates an entire error that is a control error of the entire observation period and increases the output value as the entire error increases; and at least one of: a second function part that evaluates a sectional error that is a control error of a particular section in the observation period and increases the output value as the sectional error increases; and a third function part that evaluates an instantaneous error that is a control error of a particular time point in the observation period and increases the output value as the instantaneous error increases.Type: GrantFiled: October 23, 2018Date of Patent: September 20, 2022Assignee: Brother Kogyo Kabushiki KaishaInventor: Eisuke Takahashi
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Publication number: 20220266612Abstract: There is provided control system including: movement mechanism configured so that the movement mechanism is driven by motor; detector configured to detect position and speed of the movable member; and controller. The controller is configured to: control the motor so that the movement mechanism reciprocatively moves the movable member; and in a course to move the movable member to a returning point, control the movement of the movable member by controlling the motor based on the speed of the movable member so that the movable member is moved at a constant speed until a deceleration start point of time, and control the movement of the movable member by controlling the motor based on the position of the movable member so that the movable member is decelerated from the deceleration start point of time and stops at the returning point in accordance with a target position locus.Type: ApplicationFiled: February 23, 2022Publication date: August 25, 2022Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: EISUKE TAKAHASHI, SACHIE KIRIYAMA