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Wireless power supply system, wireless power transmitting device, and wireless power receiving device

  • US 9,837,828 B2
  • Filed: 12/11/2014
  • Issued: 12/05/2017
  • Est. Priority Date: 03/30/2009
  • Status: Active Grant
First Claim
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1. A wireless power supply system, comprising:

  • a wireless power transmitting device configured to include a power transmitting resonant circuit having a predetermined resonant frequency characteristic, and to transmit electric power wirelessly via the power transmitting resonant circuit, the power transmitting resonant circuit including a power transmitting coil;

    a plurality of wireless power receiving devices configured to include respective power receiving resonant circuits having a same resonant frequency characteristic as the power transmitting resonant circuit, and to wirelessly receive electric power from the wireless power transmitting device by a magnetic field resonance mode arising as a result of the power receiving resonant circuit tuning to a resonant frequency of the power transmitting resonant circuit, the power receiving resonant circuits each including a power receiving coil; and

    a power receiving control unit included in each of the wireless power receiving devices and configured to make the power receiving resonant circuit into a closed circuit by closing a switch connected to the power receiving coil in response to a charge request being sent to the wireless power transmitting device, whereinthe wireless power transmitting device generates the magnetic field resonance mode between the wireless power transmitting device and a wireless power receiving device that has received the charge request from among the plurality of the wireless power receiving devices.

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