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公开(公告)号：US20240423473A1
公开(公告)日：2024-12-26
申请号：US18824386
申请日：2024-09-04
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI
Abstract: A housing of an in-vivo implantable medical device includes a window including a nonmetallic biocompatible material that enables formation of an electromagnetic resonance field and radio communication. In plan view of the housing, an outer shape of the window is larger than an outer shape of a power receiving coil. An outer shape of a magnetic sheet is larger than the outer shape of the power receiving coil to form a magnetic circuit that serves as a main magnetic flux that forms an electromagnetic resonance field to obtain power for the power receiving coil. A radio communication antenna is at a position where the main magnetic flux does not intersect. An outer shape of the radio communication antenna has an area of 1/100 or less of the outer shape of the power receiving coil.
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公开(公告)号：US20240204581A1
公开(公告)日：2024-06-20
申请号：US18590231
申请日：2024-02-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI , Hiroto YASUI
CPC classification number: H02J50/80 , H02J7/00045 , H02J50/12
Abstract: A wireless power transfer system includes a power transmission device and a power reception device. The power transmission device includes a power transmission circuit and a power transmission coil. The power reception device includes a power reception circuit and a power reception coil. The power reception device is arranged relative to the power transmission device such that the power reception coil electromagnetically couples with the power transmission coil. The power transmission circuit and the power reception circuit each set a power exclusive-use period and a signal insertion period. The power exclusive-use period is set as a main part of a repetition cycle of power transmission and reception, during which an interrupt signal for power transmission authentication is not used.
The signal insertion period is set as a localized part of the repetition cycle of power transmission and reception, during which the interrupt signal for power transmission authentication is inserted.-
公开(公告)号：US20230010809A1
公开(公告)日：2023-01-12
申请号：US17933565
申请日：2022-09-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Osamu MIKI , Tatsuya HOSOTANI
Abstract: A multi-converter power supply system includes a plurality of cell converters, a common node to which an individual output terminal of each of the plurality of cell converters is connected, a current waveform signal generation circuit that generates a current waveform signal corresponding to a current waveform flowing through an individual inductor, and a first instrumentation amplifier that receives input of an individual output voltage signal obtained from the individual output terminal and the current waveform signal and that outputs a signal for comparison with a current common signal shared by a plurality of switching control circuits. The current waveform signal and the individual output voltage signal that are input to the first instrumentation amplifier are formed with reference to a potential of the common node.
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Patent Agency Ranking
公开(公告)号：US20230016857A1
公开(公告)日：2023-01-19
申请号：US17933625
申请日：2022-09-20
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI , Norikazu SAKAMOTO
IPC: H02M3/158
Abstract: A multi-converter power supply system includes a plurality of cell converters, a common node to which an individual output terminal of each of the plurality of cell converters is connected, a current waveform signal generation circuit that generates a current waveform signal corresponding to a current waveform flowing through an individual inductor, a current average signal generation circuit that generates a current average signal by averaging temporal changes that the current waveform signal has in a switching period of a switching control circuit, and an instrumentation amplifier that receives input of a current common signal obtained from the common node and the current average signal and that generates an individual current feedback signal to be fed back to the switching control circuit.
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公开(公告)号：US20210152021A1
公开(公告)日：2021-05-20
申请号：US17162610
申请日：2021-01-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI , Kiyokazu YAMADA
Abstract: An in-vivo implantable medical device includes a housing, an electronic circuit component, a power reception coil, and a magnetic material. The housing is formed of a biocompatible material and forms an internal space. The electronic circuit component is disposed in the internal space. The power reception coil is disposed in the internal space, interacts with an external electromagnetic field to form an electromagnetic resonance field to receive power. At least part of a region of the housing in which the electromagnetic resonance field is formed is formed of a biocompatible nonmetal material.
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公开(公告)号：US20230275465A1
公开(公告)日：2023-08-31
申请号：US18311162
申请日：2023-05-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI
CPC classification number: H02J50/12 , H02J7/007 , H02J7/00308 , H02M3/157 , H02J50/80
Abstract: A wireless power reception circuit system includes a wireless power reception circuit, an electric storage device, a load unit, a digital control circuit, a voltage conversion circuit, a DC-DC converter, smoothing capacitors, a voltage OR circuit, and an external signal setting circuit for resetting the digital control circuit. An enable signal input terminal of the voltage conversion circuit is in a disabled state when the voltage conversion circuit is not controlled by the digital control circuit. The digital control circuit supplies an enable signal to the enable signal input terminal of the voltage conversion circuit when operating the voltage conversion circuit.
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公开(公告)号：US20230128671A1
公开(公告)日：2023-04-27
申请号：US18068473
申请日：2022-12-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI
Abstract: A wireless power transfer system comprises a power transmission device and a power reception device. The power reception device includes a power reception coil that wirelessly magnetically couples with a power transmission coil included in the power transmission device. The power transmission device includes a switching circuit in which switch elements perform switching operations, an input voltage adjustment circuit that is electrically connected to the switching circuit and adjusts an input voltage, and an MPU. The MPU is configured to recognize a power requirement presented by the power reception device, control the input voltage adjustment circuit and control intermittent oscillation of the switching circuit, and adjust the input voltage to prevent an oscillation stop period of the intermittent oscillation from exceeding a predetermined stop period.
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公开(公告)号：US20210408916A1
公开(公告)日：2021-12-30
申请号：US17470800
申请日：2021-09-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Norikazu SAKAMOTO , Tatsuya HOSOTANI
Abstract: A plurality of power conversion units each include an inductor, a switching circuit, and a PWM control IC. An MPU outputs control signals to the plurality of power conversion units. Output parts of the plurality of power conversion units are connected to an output terminal in a parallel manner. Operating number signal generating circuits of feedback signal generating circuits generate an operating number signal Sop on the basis of individual current signals based on inductor currents in the plurality of power conversion units, and output the operating number signal to the MPU. The MPU sets operations of the plurality of power conversion units on the basis of the operating number signal, and outputs the control signals including the settings of the operations of the power conversion units.
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