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Power transmission apparatus

  • US 9,558,884 B2
  • Filed: 02/18/2014
  • Issued: 01/31/2017
  • Est. Priority Date: 09/02/2011
  • Status: Active Grant
First Claim
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1. A power transmission apparatus comprising:

  • a cover part attached to one of a power transmitter and an electronic apparatus, the power transmitter including a primary-side coil connected to an alternating-current power supply and a primary-side resonant coil configured to receive power from the primary-side coil by electromagnetic induction, the electronic apparatus including a secondary-side coil;

    a secondary-side resonant coil disposed in the cover part, and configured to transmit to the secondary-side coil the power received from the primary-side resonant coil by magnetic field resonance generated between the primary-side resonant coil and the secondary-side resonant coil;

    a voltage fluctuation detecting part configured to detect voltage fluctuation occurring in the secondary-side resonant coil; and

    a communication part configured to transmit a signal that represents the voltage fluctuation detected by the voltage fluctuation detecting part, whereinthe cover part is attached to the electronic apparatus including the secondary-side coil, andthe communication part transmits the signal that represents the voltage fluctuation.

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