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Power transmitting device, power feeding system, and power feeding method

  • US 9,941,746 B2
  • Filed: 07/06/2016
  • Issued: 04/10/2018
  • Est. Priority Date: 07/13/2012
  • Status: Active Grant
First Claim
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1. A power transmitting device comprising:

  • a power transmitting portion; and

    a power source portion electrically connected to the power transmitting portion,the power transmitting portion comprising;

    a power transmitting coil configured to be supplied with power from the power source portion;

    a power transmitting resonance coil which is electromagnetically coupled with the power transmitting coil by electromagnetic induction and including a first switch; and

    a directional coupler which inputs reflected power reflected from the power transmitting resonance coil to a second switch and a third switch,wherein the second switch is turned on when the inputted reflected power is smaller than reference power,wherein the third switch is turned on when the inputted reflected power is larger than the reference power, andwherein the first switch is turned on when the second switch is turned on.

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