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Invention Publication
CN110121665A 金属异物检测装置、无线供电装置、无线受电装置、及无线电力传输系统 有权

  • Patent Title: 金属异物检测装置、无线供电装置、无线受电装置、及无线电力传输系统
  • Patent Title (English): METALLIC FOREIGN BODY DETECTING DEVICE, WIRELESS POWER SUPPLY DEVICE, WIRELESS POWER RECEIVING DEVICE, AND WIRELESS POWER TRANSMITTING SYSTEM
  • Application No.: CN201780081085.2
    Application Date: 2017-12-20
  • Publication No.: CN110121665A
    Publication Date: 2019-08-13
  • Inventor: 大嶋一则 , 后谷明 , 近藤和树 , 福泽成敏
  • Applicant: TDK株式会社
  • Applicant Address: 日本东京都
  • Assignee: TDK株式会社
  • Current Assignee: TDK株式会社
  • Current Assignee Address: 日本东京都
  • Agency: 北京尚诚知识产权代理有限公司
  • Agent 杨琦; 黄浩
  • Priority: 2016-253816 2016.12.27 JP
  • International Application: PCT/JP2017/045742 2017.12.20
  • International Announcement: WO2018/123766 JA 2018.07.05
  • Date entered country: 2019-06-27
  • Main IPC: G01V3/10
  • IPC: G01V3/10 ;  H02J7/00 ;  H02J50/12 ;  H02J50/60
金属异物检测装置、无线供电装置、无线受电装置、及无线电力传输系统
Abstract:
本发明提供一种金属异物检测装置，关于使用天线线圈进行的金属异物的检测，抑制供电中的检测精度的降低。金属异物检测装置(14)以如下方式构成，具备：天线线圈(L3)；与天线线圈(L3)一起形成谐振电路(RC)的电容器(C3)；通过对谐振电路(RC)施加电压，使谐振电路(RC)产生振动信号Vb的电源(148b)；基于振动信号(Vb)的波形判定金属异物的有无的判定电路(145)；插入谐振电路(RC)内的谐振电容器开关(149)；控制谐振电容器开关(149)的开闭状态的控制电路(147)，控制电路(147)被构成为，对应于开始由电源(148b)进行的电压向谐振电路RC的施加，将谐振电容器开关(149)设为闭状态。
Abstract(English):

With respect to the detection, using an antenna coil, of a metallic foreign body, the present invention suppresses a deterioration in detection accuracy when power is being supplied. A metallic foreign body detecting device 14 is provided with: an antenna coil L3; a capacitor C3 which forms a resonance circuit RC in conjunction with the antenna coil L3; a power supply 148b which causes a vibrationsignal Vb to be generated in the resonance circuit RC by the application of a voltage to the resonance circuit RC; a determining circuit 145 which determines the presence or absence of a metallic foreign body on the basis of the waveform of the vibration signal Vb; a resonance capacitor switch 149 inserted into the resonance circuit RC; and a control circuit 147 which controls an open or closed state of the resonance capacitor switch 149. The control circuit 147 is configured to bring the resonance capacitor switch 149 to a closed state in accordance with the start of the application of the voltage to the resonance circuit RC by the power supply 148b.

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