公开(公告)号：US20140253052A1

公开(公告)日：2014-09-11

申请号：US14282566

申请日：2014-05-20

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Sinji GOMA ,  Keiichi ICHIKAWA ,  Tsuyoshi SUESADA

IPC: H02J7/00

CPC classification number: H02J7/00 ,  H02J5/005 ,  H02J50/05 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90

Abstract: Power transmission device that causes a power supply circuit to supply a first voltage to a first active electrode when power transmission is performed, causes the power supply circuit to supply a second voltage that is lower than the first voltage to the first active electrode and causes power reception device detection means to perform frequency sweeping at a first time interval until the power reception device is mounted, or causes the power supply circuit to supply a third voltage that is lower than the first voltage to the first active electrode and causes the power reception device detection means to perform frequency sweeping at a second time interval that is longer than the first time interval until the power reception device is removed.

Abstract translation: 电力传输装置，其在电力传输进行时使电源电路向第一有效电极供给第一电压，使得电源电路向第一有源电极提供低于第一电压的第二电压，并使电力 接收装置检测装置，用于以第一时间间隔执行频率扫描，直到安装电力接收装置，或者使电源电路向第一有效电极提供低于第一电压的第三电压，并且使得电力接收装置 检测装置，其以比第一时间间隔长的第二时间间隔执行频率扫描，直到电力接收装置被去除。

公开(公告)号：US20170315159A1

公开(公告)日：2017-11-02

申请号：US15654341

申请日：2017-07-19

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Keiichi ICHIKAWA ,  Tsuyoshi SUESADA

IPC: G01R19/00 ,  H02J50/12 ,  G01R15/06 ,  H02J50/70 ,  H02J7/32

Abstract: A voltage detection circuit includes an inductor connected to connection portions configured to input an alternating-current voltage, an inductor magnetic-field coupled to the inductor, a capacitor connected in parallel to the inductor and constituting a secondary-side resonant circuit with the inductor, and a voltage detector configured to detect an output voltage from the secondary-side resonant circuit. Therefore, a voltage detection circuit, a power transmission device, and a power transmission system capable of detecting an alternating-current voltage with high detection sensitivity irrespective of the potential of a power transmission line are provided.

公开(公告)号：US20180019053A1

公开(公告)日：2018-01-18

申请号：US15715391

申请日：2017-09-26

Applicant: MURATA MANUFACTURING CO., LTD.

Inventor： Keiichi ICHIKAWA ,  Tsuyoshi SUESADA ,  Kentaro MIKAWA

IPC: H01F27/28 ,  H01F27/245 ,  H01F38/14

CPC classification number: H01F27/2804 ,  H01F27/245 ,  H01F38/14 ,  H01F38/30 ,  H01F2027/2809 ,  H02J50/10

Abstract: An inductor module includes a laminate where multiple insulator layers are laminated, a main line conductor in the shape of a straight line formed on the laminate, a current detection conductor that is formed on the laminate and magnetically coupled with the main line conductor, and coil conductors that are formed on the laminate and constitute an inductor element. An absolute value of a coupling coefficient between the main line conductor and inductor element, and an absolute value of a coupling coefficient between the current detection conductor and the inductor element, are each smaller than an absolute value of a coupling coefficient between the main line conductor and the current detection conductor. Thus, an inductor module that detects current and is used as an inductor element, and an electric power transmission system including the inductor module, are provided.

公开(公告)号：US20240354547A1

公开(公告)日：2024-10-24

申请号：US18761778

申请日：2024-07-02

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hiromi MURAYAMA ,  Tsuyoshi SUESADA ,  Yoichi SAITO ,  Noriyuki UEKI

IPC: G06K19/077 ,  G06K19/07 ,  H01Q1/22 ,  H01Q7/00

CPC classification number: G06K19/07794 ,  G06K19/0723 ,  G06K19/07783 ,  G06K19/07786 ,  H01Q1/2208 ,  H01Q7/00

Abstract: An RFID auxiliary antenna is coupled both with an RFID tag antenna provided for an RFID tag attached to an article and with an RFID antenna. The RFID auxiliary antenna includes a conductor loop to be magnetically coupled with the coil antenna, a dipole antenna, and the capacitor which has the capacitance which resonates with the inductance of the conductor loop. This configuration obtains an RFID auxiliary antenna for placing RFID tags and an RFID antenna under a high degree of freedom of a positional relationship, an RFID communication apparatus including such an auxiliary antenna, and an RFID communication system using the RFID communication apparatus.