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公开(公告)号：US20140354075A1
公开(公告)日：2014-12-04
申请号：US14463842
申请日：2014-08-20
Applicant: MURATA MANUFACTURING CO. LTD.
Inventor： Tsuyoshi Suesada , Shinji Goma , Akihiko Shibata
IPC: H02J5/00
Abstract: A power reception device includes power reception electrodes which establish electric field coupling with power transmission electrodes provided in a power transmission device; and a transformer and rectification circuit which supply electric power based on the electric field excited by the power reception electrodes to a load. The power reception electrodes and the transformer form a parallel resonant circuit. The power transmission device includes a transformer which generates AC voltage to be applied to the power transmission electrodes; and a table in which correspondences between a plurality of resonant frequencies and a plurality of rated powers are described. The power transmission device sweeps the frequency of a PWM signal and detects the resonant frequency of the parallel resonant circuit, identifies a rated power corresponding to the detected resonant frequency based on the table, and adjusts the duty ratio of the PWM signal to match the identified rated power.
Abstract translation: 电力接收装置包括与设置在电力传输装置中的电力传输电极建立电场耦合的受电电极; 以及基于由受电电极激励的电场向负载提供电力的变压器和整流电路。 受电极和变压器形成并联谐振电路。 电力传输装置包括产生要施加到电力传输电极的AC电压的变压器; 以及描述多个谐振频率和多个额定功率之间的对应关系的表格。 功率传输装置扫描PWM信号的频率并检测并联谐振电路的谐振频率，根据该表识别与检测到的谐振频率相对应的额定功率，并调整PWM信号的占空比以匹配识别的 额定功率
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公开(公告)号：US20140306552A1
公开(公告)日：2014-10-16
申请号：US14315921
申请日：2014-06-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinji Goma , Tsutomu Ieki
IPC: H04B5/00
CPC classification number: H04B5/0012 , H02J17/00 , H02J50/05 , H04B5/0031 , H04B5/0037
Abstract: A power transmission system is provided which is able to perform stable data communication with high communication sensitivity even when data communication and power transmission are performed at the same time.At least a third coupling electrode pair of first to third coupling electrode pairs is a reference electrode pair connected to a reference potential, one end of a first communication portion is connected to a reference potential of a power transmitting apparatus, and one end of a second communication portion is connected to a reference potential of a power receiving apparatus. Another end of the first communication portion is connected to either one of a power transmitting apparatus-side first or second coupling electrode, and another end of the second communication portion is connected to either one of a power receiving apparatus-side first or second coupling electrode.
Abstract translation: 提供了一种即使在同时进行数据通信和电力传输的情况下也能够以高通信灵敏度进行稳定的数据通信的电力传输系统。 至少第三耦合电极对的第一至第三耦合电极对是连接到参考电位的参考电极对，第一通信部分的一端连接到电力发送装置的参考电位，第二耦合电极对的一端 通信部分连接到电力接收装置的参考电位。 第一通信部的另一端与动力传递装置侧的第一或第二耦合电极中的任一方连接，第二连通部的另一端与电力接收装置侧的第一或第二耦合电极 。
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公开(公告)号：US09876362B2
公开(公告)日：2018-01-23
申请号：US14250656
申请日：2014-04-11
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Keiichi Ichikawa , Shinji Goma , Tsuyoshi Suesada , Henri Bondar
Abstract: A capacitance (Cp) is a capacitance formed between a transmitting-device-side passive electrode and a receiving-device-side passive electrode. A capacitance (Ca) is a capacitance formed between a transmitting-device-side active electrode and a receiving-device-side active electrode. A bridge circuit formed by Z1 to Z4 is connected to a secondary side of a step-up transformer, where Z1 represents an impedance of a first element, Z2 represents an impedance of a second element, Z3 represents an impedance of a series circuit formed by the capacitance (Ca) and a load, and Z4 represents an impedance of the capacitance (Cp). By determining the impedances Z1 to Z4 such that this bridge circuit is balanced, a potential at a receiving-device-side reference potential point is made equal to a ground potential. This reduces variation in receiving-device-side reference potential, reduces noise, and stabilizes the operation of a load circuit on the receiving device side.
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公开(公告)号：US20150024685A1
公开(公告)日：2015-01-22
申请号：US14505142
申请日：2014-10-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinji Goma , Tsutomu leki
CPC classification number: H04B5/0012 , H02J5/005 , H02J17/00 , H02J50/05 , H02J50/80 , H04B5/0037
Abstract: A power transmission system and power transmitter device that suppress degradation of communication quality in data communication even when the data communication and power transmission are performed concurrently.One end portion of a first communication unit of a power transmitter device is connected to a first communication coupling electrode, and one end portion of a second communication unit of a power receiver device is connected to a second communication coupling electrode that forms capacitive coupling with the first communication coupling electrode. The other end portion of the first communication unit is connected to a reference potential electrode of the power transmitter device, and the other end portion of the second communication unit is connected to a reference potential electrode of the power receiver device.
Abstract translation: 即使在同时进行数据通信和电力传输的情况下也能够抑制数据通信中的通信质量劣化的电力传输系统和电力发送装置。 功率发射装置的第一通信单元的一端部连接到第一通信耦合电极，并且功率接收装置的第二通信单元的一端部连接到与第二通信耦合电极形成电容耦合的第二通信耦合电极 第一通信耦合电极。 第一通信单元的另一端部连接到电力发送装置的基准电位电极，第二通信单元的另一端部与受电装置的基准电位电极连接。
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公开(公告)号：US10014720B2
公开(公告)日：2018-07-03
申请号：US14802342
申请日：2015-07-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Keiichi Ichikawa , Shinji Goma
Abstract: A power transmission system includes a charging station and a power receiving device. The charging station has a pair of first electrodes, and a signal source that emits an alternating current signal; and a step-up transformer that applies a stepped-up voltage to the pair of first electrodes. The power receiving device has a pair of second electrodes opposite to and that capacitively couple with the first electrodes; a step-down transformer; a rectifying and smoothing circuit that rectifies and smoothes the stepped-down AC voltage; and a load circuit, The charging station further has a potential stabilizing electrode that capacitively couples with the electrode connected to a reference potential of the power receiving device and the potential stabilizing electrode is connected to a reference potential of the charging station via a charge controller.
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Patent Agency Ranking
公开(公告)号：US09780839B2
公开(公告)日：2017-10-03
申请号：US14719417
申请日：2015-05-22
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinji Goma , Nobuhito Tsubaki , Noboru Kato , Tsuyoshi Suesada
CPC classification number: H04B5/0037 , H01Q7/00 , H02J5/005 , H02J17/00 , H02J50/05 , H02J50/80 , H04B5/0075
Abstract: An active electrode and a passive electrode are electrically field-coupled with an active electrode and a passive electrode provided in a power transmission device, respectively. Power in a high frequency voltage excited on the active electrode and the passive electrode is supplied to a mobile unit via a step-down transformer, a rectification smoothing circuit, and a DC-DC converter. A CPU turns off switches when wireless communication is carried out. The passive electrode functions as a booster antenna that is magnetically field-coupled with an antenna coil. A high frequency signal outputted from an RF circuit is transmitted via the antenna coil and the passive electrode, and a high frequency signal transmitted from the power transmission circuit is inputted, via the passive electrode and the antenna coil, to the RF circuit.
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公开(公告)号：US20140300201A1
公开(公告)日：2014-10-09
申请号：US14250656
申请日：2014-04-11
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Keiichi Ichikawa , Shinji Goma , Tsuyoshi Suesada , Henri Bondar
IPC: H02J5/00
Abstract: A capacitance (Cp) is a capacitance formed between a transmitting-device-side passive electrode and a receiving-device-side passive electrode. A capacitance (Ca) is a capacitance formed between a transmitting-device-side active electrode and a receiving-device-side active electrode. A bridge circuit formed by Z1 to Z4 is connected to a secondary side of a step-up transformer, where Z1 represents an impedance of a first element, Z2 represents an impedance of a second element, Z3 represents an impedance of a series circuit formed by the capacitance (Ca) and a load, and Z4 represents an impedance of the capacitance (Cp). By determining the impedances Z1 to Z4 such that this bridge circuit is balanced, a potential at a receiving-device-side reference potential point is made equal to a ground potential. This reduces variation in receiving-device-side reference potential, reduces noise, and stabilizes the operation of a load circuit on the receiving device side.
Abstract translation: 电容（Cp）是在发送器件侧无源电极和接收器件侧无源电极之间形成的电容。 电容（Ca）是在发送器件侧有源电极和接收器件侧有源电极之间形成的电容。 由Z1至Z4形成的桥接电路连接到升压变压器的次级侧，其中Z1表示第一元件的阻抗，Z2表示第二元件的阻抗，Z3表示由 电容（Ca）和负载，Z4表示电容（Cp）的阻抗。 通过确定阻抗Z1至Z4使得该桥式电路平衡，使接收装置侧参考电位点处的电位等于接地电位。 这减小了接收设备侧参考电位的变化，降低了噪声，并且使接收设备侧的负载电路的操作稳定化。
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公开(公告)号：US10199867B2
公开(公告)日：2019-02-05
申请号：US15393651
申请日：2016-12-29
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Keiichi Ichikawa , Shinji Goma , Henri Bondar
Abstract: A power conversion device includes a step-down-type transformer and a bridge circuit that rectifies output voltage of the transformer and supplies the rectified output voltage to a load. The bridge circuit is connected to a secondary winding of the transformer and includes MOS-FETs connected in series and diodes connected in series. A gate of the MOS-FET is connected to one end of a primary winding of the transformer with a capacitor interposed therebetween and a gate of the MOS-FET is connected to the other end of the primary winding of the transformer with a capacitor interposed therebetween. With this, a power conversion device and a wireless power transmission system that can achieve space saving and reduce loss in a rectifying element are provided.
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公开(公告)号：US10191119B2
公开(公告)日：2019-01-29
申请号：US14858136
申请日：2015-09-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinji Goma , Kazuya Kato
Abstract: An inspecting apparatus is for a noncontact power transfer system that transfers electric power from a transmitting unit to a receiving device in a noncontact manner. The inspecting apparatus includes a coupling capacitance varying unit configured to vary at least one of a first coupling capacitance formed between a transmitting-side passive electrode and a receiving-side passive electrode and a second coupling capacitance formed between a transmitting-side active electrode and a receiving-side active electrode when the receiving device is placed on the transmitting unit, and a control unit configured to monitor an alternating-current voltage generated between the receiving-side passive electrode and the receiving-side active electrode of the receiving device or a direct-current voltage obtained through conversion by a rectifying circuit.
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10.发明授权公开(公告)号：US10033217B2
公开(公告)日：2018-07-24
申请号：US14632704
申请日：2015-02-26
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinji Goma , Kazuya Kato , Tsutomu Ieki
IPC: H02J7/02 , H02J50/80 , H02J50/12 , H01F37/00 , H02J50/40 , H02J50/70 , H02J50/10 , H02J17/00 , H01F38/14 , H02H7/10 , H02J5/00 , H02M3/22 , H02J50/05 , H01Q1/00
Abstract: A wireless power receiver device includes a sheet-like electrode sheet section and a power receiver section. The electrode sheet section includes a power receiver side active electrode and a power receiver side passive electrode that are substantially coplanar and formed into sheet-like shapes; lead lines that are coplanar with both the electrodes, extended from the respective electrodes, and formed into sheet-like shapes; and an insulation sheet that covers both the electrodes and both the lead lines from both sides thereof. The power receiver section includes a step-down unit that steps down an alternating-current voltage induced between end portions of the lead lines; a power receiver module that rectifies and smoothes the alternating-current voltage that is stepped down by the step-down unit; and a connector for outputting an output voltage of the power receiver module.
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