公开(公告)号：US09685794B2

公开(公告)日：2017-06-20

申请号：US14700673

申请日：2015-04-30

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hironobu Takahashi ,  Keiichi Ichikawa ,  Tsuyoshi Suesada

IPC: H02J5/00 ,  H02J17/00

CPC classification number: H02J50/12 ,  H02J5/005 ,  H02J17/00

Abstract: When power transmitting electrodes of a power transmitting apparatus are respectively facing power receiving electrodes of a power receiving apparatus, a composite resonant circuit including a series resonant circuit and a parallel resonant circuit is formed through a compound capacitance formed between the power transmitting electrodes and the power receiving electrodes. In a predetermined mutually facing state in which the compound capacitance becomes maximum, the impedances of the configuration components of the composite resonant circuit are set such that a resonant frequency at which the impedance of the composite resonant circuit from a signal generator side when inputs of a load circuit is short-circuited becomes locally minimum, becomes higher than a resonant frequency at which the impedance of the composite resonant circuit as seen from the signal generator side when the inputs of the load circuit are open becomes locally maximum.

公开(公告)号：US20160006271A1

公开(公告)日：2016-01-07

申请号：US14858078

申请日：2015-09-18

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keiichi Ichikawa ,  Tsuyoshi Suesada ,  Hironori Sakai

IPC: H02J5/00 ,  H02J7/02

CPC classification number: H02J5/005 ,  H02J7/025 ,  H02J17/00 ,  H02J50/05 ,  H04B5/0012

Abstract: A power transmission apparatus includes capacitors connected in series between an active electrode and a passive electrode. A power reception apparatus includes capacitors connected in series between an active electrode and a passive electrode. When a capacitance between the active electrodes is represented by Caa, a capacitance between the passive electrodes is represented by Cpp, and reactances of the capacitors are represented by X1, X2, X3, and X4; the active electrodes, the passive electrodes and the capacitors are configured such that Cpp/Caa=X1/X2=X3/X4 and Cpp≧Caa are satisfied. Thus, a wireless power transmission system capable of stabilizing an operation of a load circuit in the power reception apparatus is provided.

Abstract translation: 电力传输装置包括串联连接在有源电极和被动电极之间的电容器。 电力接收装置包括串联连接在有源电极和被动电极之间的电容器。 当有源电极之间的电容用Caa表示时，无源电极之间的电容由Cpp表示，电容器的电抗由X1，X2，X3和X4表示; 有源电极，无源电极和电容器被配置成使得Cpp / Caa = X1 / X2 = X3 / X4和Cpp≥Caa。 因此，提供了能够稳定受电装置中的负载电路的动作的无线电力传输系统。

公开(公告)号：US20150326033A1

公开(公告)日：2015-11-12

申请号：US14802342

申请日：2015-07-17

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Keiichi Ichikawa ,  Shinji Goma

IPC: H02J5/00 ,  H02J7/02

CPC classification number: H02J50/05 ,  H02J5/005 ,  H02J7/025 ,  H02J50/12

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.

Abstract translation: 电力传输系统包括充电站和电力接收装置。 充电站具有一对第一电极和发出交流信号的信号源; 以及对所述一对第一电极施加升压电压的升压变压器。 电力接收装置具有与第一电极相对并与第一电极电容耦合的一对第二电极; 降压变压器; 整流和平滑电路，整流和平滑降压的交流电压; 充电站还具有与连接到电力接收装置的参考电位的电极电容耦合的电势稳定电极，并且电位稳定电极经由充电控制器连接到充电站的参考电位。

公开(公告)号：US20150215007A1

公开(公告)日：2015-07-30

申请号：US14683559

申请日：2015-04-10

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shinji Goma ,  Keiichi Ichikawa

IPC: H04B5/00 ,  H02J7/02

CPC classification number: H04B5/0037 ,  H01M10/613 ,  H01M10/6554 ,  H01M2010/4271 ,  H02J7/025 ,  H02J17/00 ,  H02J50/05 ,  H02J50/90 ,  H04B5/0012

Abstract: In a wireless power transmission system that transmits power from a power transmitting device to a power receiving device by electric field coupling, the power receiving device includes a power receiving module having a circuit for rectifying and smoothing an AC voltage which is generated between the active electrode and the passive electrode, a secondary battery, and a heat conducting plate that transfers heat which is generated in the power receiving module in power transmission from the power transmitting device to the power transmitting device. The power transmitting device includes a power transmission module which converts an input DC voltage to an AC voltage and applies the AC voltage between the active electrode and the passive electrode and a heat conducting plate which makes contact with the heat conducting plate and receives heat from the power receiving device.

Abstract translation: 在通过电场耦合将电力从功率发送装置发送到电力接收装置的无线电力传输系统中，电力接收装置包括电力接收模块，该电力接收模块具有用于整流和平滑AC电压的电路，该电压在有源电极 以及被动电极，二次电池和导热板，其将来自发电装置的电力传输中的电力接收模块中产生的热传递到电力传输装置。 电力传输装置包括：功率传输模块，其将输入的DC电压转换为AC电压，并且在有源电极和被动电极之间施加AC电压;以及导热板，其与导热板接触并从 受电装置

公开(公告)号：US20140152122A1

公开(公告)日：2014-06-05

申请号：US13874607

申请日：2013-05-01

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Keiichi Ichikawa

IPC: H02J17/00 ,  H02J7/02

CPC classification number: H02J50/40 ,  H02J7/0042 ,  H02J7/0044 ,  H02J7/025 ,  H02J17/00 ,  H02J50/05 ,  H02J50/70

Abstract: In a power transmitting device constituting a wireless power transmission system, a voltage generating circuit applies a voltage between an active electrode and a passive electrode. In a power receiving device, a voltage generated between an active electrode that is opposed to the active electrode, and a passive electrode that is opposed to or brought into contact with the passive electrode when the power receiving device is placed on the power transmitting device is inputted to a load circuit as a power supply voltage. Passive electrodes of the power transmitting device are provided to electrostatically shield the opposed active electrodes with respect to the earth. Consequently, a wireless power transmission system, a power transmitting device, and a power receiving device are configured so the potential of the power transmitting device and the power receiving device during power transmission is stabilized to thereby prevent malfunction of the power receiving device.

Abstract translation: 在构成无线电力传输系统的电力传输装置中，电压产生电路在有源电极和被动电极之间施加电压。 在电力接收装置中，在与受电电极相对的有源电极之间产生的电压与被动电极相对或与被动电极相接触的被动电极， 输入到负载电路作为电源电压。 提供电力传输装置的被动电极以相对于地球对相对的有源电极进行静电屏蔽。 因此，无线电力传输系统，电力传输装置和电力接收装置被配置为使得电力传输期间的电力传输装置和电力接收装置的电位稳定，从而防止电力接收装置的故障。