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公开(公告)号：US20230011922A1
公开(公告)日：2023-01-12
申请号：US17933114
申请日：2022-09-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI
IPC: H05K1/02 , H05K1/14 , H05K7/20 , H01L25/16 , H01L23/367 , H01L23/373 , G06F1/20
Abstract: A first circuit board includes a positive output pin and a negative output pin of a power conversion circuit, each of which has a shape projecting from a second main surface. A second circuit board has a positive through via and a negative through via, each of which has a shape extending between a third main surface and a fourth main surface. The second main surface of the first circuit board and the third main surface of the second circuit board are physically in close contact with each other. The positive output pin is inserted through the positive through via to reach the fourth main surface. The negative output pin is inserted through the negative through via in such a manner as to reach the fourth main surface. The load receives a current supplied from the power conversion circuit through the positive output pin and the negative output pin.
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公开(公告)号：US20220131464A1
公开(公告)日：2022-04-28
申请号：US17647269
申请日：2022-01-06
Applicant: Murata Manufacturing Co., Ltd
Inventor： Tatsuya HOSOTANI
Abstract: A switching power supply apparatus includes switching elements that generate switching current flowing through an inductor, a switching control circuit, and an inductor current detection circuit that detects current flowing through the inductor. The inductor current detection circuit is composed of a time constant circuit including a detection capacitor and a detection resistor that are connected in series to each other and is connected in parallel to the inductor. A time constant of the inductor current detection circuit has characteristics varied with frequency or temperature. This compensates variation of equivalent series resistance of the inductor with respect to the frequency or variation thereof with respect to the temperature.
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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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公开(公告)号：US20210408830A1
公开(公告)日：2021-12-30
申请号：US17470770
申请日：2021-09-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takahiro NAGAI , Tatsuya HOSOTANI
Abstract: High-frequency power is supplied from a power transmitter to a power receiver using an electromagnetic resonance phenomenon between the power transmitter and the power receiver. The power receiver converts the high-frequency power into a power reception direct-current power to charge a battery. A power reception control unit in the power receiver detects a state of charge of the battery and generates a power transmission stop signal on the basis of the state of charge of the battery. A resonance modulation circuit in the power receiver changes resonance conditions in response to the power transmission stop signal. An MPU in the power transmitter demodulates the power transmission stop signal based on an electric variable from a power transmission direct-current power supply due to a change in the resonance conditions and stops an operation of supplying the high-frequency power in a transmission power conversion circuit for a predetermined period.
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公开(公告)号：US20210152033A1
公开(公告)日：2021-05-20
申请号：US17160233
申请日：2021-01-27
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Takahiro NAGAI , Tatsuya HOSOTANI
Abstract: A wireless power transfer system includes a power transmitter including a high frequency power converter circuit that converts a direct current power into a high frequency power using a switching circuit, a power transmitter coil, and an electric field shield member close to the power transmitter coil and having a structure that uses a conductive member to form an equivalent capacitance between the electric field shield member and the power transmitter coil by electric coupling therebetween during a power transmitting operation such that the value of the equivalent capacitance becomes greater than the value of an equivalent capacitance formed between the power transmitter coil and ground. The power transmitter causes electric potentials in the electric field shield member to be identical using the conductive member, suppresses changes in an electric field in a vicinity of the power transmitter coil, and suppresses radiation of the electric field noise.
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Patent Agency Ranking
公开(公告)号：US20210111626A1
公开(公告)日：2021-04-15
申请号：US17129874
申请日：2020-12-21
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Osamu MIKI , Tatsuya HOSOTANI
Abstract: Power line patterns are, together with a ground pattern, provided separately from control line patterns. The power line pattern is formed at first and second major surfaces of a circuit board. When the circuit board is viewed in plan view, the power line pattern and the power line pattern form a line structure in which the power line pattern and the power line pattern are in parallel with and opposite to each other and the power line pattern is positioned under the power line pattern. The circuit board includes a dielectric between the power line pattern and the power line pattern. These together form an equivalent capacitor and the magnetic flux induced by the current flowing through the power line pattern and the magnetic flux induced by the current flowing through the power line pattern cancel each other out.
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公开(公告)号：US20180323655A1
公开(公告)日：2018-11-08
申请号：US16039002
申请日：2018-07-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tatsuya HOSOTANI
Abstract: A power transmission circuit is connected to a power transmission coil having a coil aperture. The power transmission circuit includes a conductive or magnetic power-transmission-coil near member opposed to the coil aperture of the power transmission coil, and a repeating coil arranged on a side opposite to a side on which the power-transmission-coil near member is arranged with respect to the power transmission coil and coupled to the power transmission coil at least via a magnetic field. When a shortest distance between the power transmission coil and the power-transmission-coil near member is expressed as (dt1) and a shortest distance between the power transmission coil and the repeating coil is expressed as (dt2), dt2≤dt1.
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公开(公告)号：US20170214278A1
公开(公告)日：2017-07-27
申请号：US15481109
申请日：2017-04-06
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Tatsuya HOSOTANI
Abstract: When a resonant frequency of a power transmission-side resonance mechanism is expressed by fra, a switching frequency of a first switch circuit and a second switch circuit is expressed by fs, and a resonant frequency of the power transmission-side resonance mechanism and a capacitor of the first switch circuit or the second switch circuit is expressed by frb, a relation of fra
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公开(公告)号：US20160006270A1
公开(公告)日：2016-01-07
申请号：US14855771
申请日：2015-09-16
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Tatsuya HOSOTANI
CPC classification number: H02J50/12 , H01F5/00 , H01F27/346 , H01F38/14 , H02J50/10 , H02J50/70 , H02J50/80
Abstract: A power transmitter and a power receiver are arranged with a space therebetween. A power transmitting device generates a resonant current by taking out electric energy from a DC power supply through an operation of a power transmitting switch circuit, directly creating, in a space, by using the resonant current, an electromagnetic field that periodically changes at a switching frequency, and forms an electromagnetic resonance field in which the space itself has energy and vibrates. A power receiving device generates a resonant current by obtaining electric energy from the resonance field and forms a new electromagnetic field on the basis of this resonant current. The power transmitting device or the power receiving device, when viewed as a geometric figure, is a fractal-shaped device formed of a line conductor pattern in which a portion is similar to the whole, and increases electromagnetic field energy in a space surrounding the fractal-shaped device.
Abstract translation: 功率发射器和电源接收器之间具有空间。 电力传输装置通过通过动力传输开关电路的动作从直流电源取出电能来产生谐振电流，通过使用谐振电流直接在空间中产生在开关周期性地变化的电磁场 并且形成电磁共振场，其中空间本身具有能量并振动。 受电装置通过从谐振场获得电能产生谐振电流，并且基于该谐振电流形成新的电磁场。 动力传递装置或受电装置当被看作几何图形时，是由线状导体图形形成的分形状的装置，其中一部分与整体相似，并增加分形的周围的空间中的电磁场能 形设备。
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公开(公告)号：US20150214788A1
公开(公告)日：2015-07-30
申请号：US14681993
申请日：2015-04-08
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Tatsuya HOSOTANI
Abstract: A power sending loop coil disposed in a power sending device takes out electric energy from DC power and generates periodically-varying electromagnetic field resonance energy in a space. A power receiving loop coil disposed in a power receiving device takes out, as electric energy, the periodically-varying electromagnetic field resonance energy from the space and supplies electric power to a load. The power sending loop coil and the power receiving loop coil are coupled to each other through electromagnetic field resonant coupling, whereby electric power is wirelessly transferred from the power sending device to the power receiving device.
Abstract translation: 设置在发电装置中的发电环线圈从直流电力中取出电能，并在空间中产生周期性变化的电磁场共振能量。 设置在受电装置中的受电环线圈作为电能从空间中取出来自空间的周期性变化的电磁场共振能量，并向负载提供电力。 发电环线圈和电力接收环线圈通过电磁场谐振耦合彼此耦合，由此电力从发电装置无线地传送到电力接收装置。
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