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Electric power transmitting apparatus and method for controlling electric power transmission

  • US 9,831,710 B2
  • Filed: 08/05/2014
  • Issued: 11/28/2017
  • Est. Priority Date: 02/22/2012
  • Status: Active Grant
First Claim
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1. An electric power transmitting apparatus that includes a first active electrode and a first passive electrode that generate capacitive coupling with a second active electrode and a second passive electrode of an electric power receiving apparatus when the respective active and passive electrodes are positioned to oppose each other, respectively, the apparatus comprising:

  • a power supply circuit including an active terminal and a passive terminal, the passive terminal having a lower potential than the active terminal;

    a reference potential terminal coupled to a reference potential;

    an electric power transmitting surface having a plurality of electric power transmission units disposed thereon, and each electric power transmission unit comprising at least one electric power transmitting electrode;

    a plurality of switching elements each coupled to a respective electric power transmitting electrode and each configured to switch connection states of the respective electric power transmitting electrode such that each electric power transmitting electrode is selectively connected to any one of the active terminal, the passive terminal, and the reference potential terminal; and

    a control circuit that controls the switching elements based on a position of the second active electrode and the second passive electrode of the electric power receiving apparatus when the electric power receiving apparatus is positioned on the electric power transmitting surface.

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