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Non-contact charging device with wireless communication antenna coil for data transfer and electric power transmitting antenna coil for transfer of electric power, and non-contact power supply system using same

  • US 9,991,731 B2
  • Filed: 06/19/2013
  • Issued: 06/05/2018
  • Est. Priority Date: 09/05/2012
  • Status: Active Grant
First Claim
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1. A non-contact power supply system comprising:

  • a non-contact charging device configured to transmit electric power by magnetic coupling; and

    a portable terminal device configured to receive electric power from the non-contact charging device in a contactless manner,the non-contact charging device and the portable terminal device each including a wireless communication unit for communication with each other,the portable terminal device including a battery that is charged by the non-contact charging device,the non-contact charging device comprising;

    a wireless communication antenna coil that is used for wireless communication;

    an electric power transmitting antenna coil part comprising a power supply coil and a resonance coil, and upon transmitting electricity, electric power is supplied from the power supply coil to the resonance coil to transmit electricity from the resonance coil to the portable terminal device; and

    an adjustment circuit coupled to both ends of the power supply coil and configured to adjust sensitivity so that a resonance frequency of the power supply coil matches a resonance frequency of a resonance circuit comprised of the resonance coil and a resonance capacitor by being in an ON state when wireless communication is performed; and

    a variable capacitance circuit coupled to the resonance coil, wherein a resonance frequency provided by the resonance coil and the variable capacitance circuit is changed for use when wireless communication is performed and when electricity is transmitted.

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