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Power transmission device

  • US 9,800,060 B2
  • Filed: 09/15/2014
  • Issued: 10/24/2017
  • Est. Priority Date: 03/28/2012
  • Status: Active Grant
First Claim
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1. A power transmission device, comprising:

  • a power supply circuit that generates an alternating voltage;

    a power transmission coil that receives an alternating voltage generated by the power supply circuit to thereby generate a magnetic field;

    a power transmission resonator that comprises a resonant coil and a resonant capacitor and through which electromagnetic induction causes an electric current to flow when a magnetic field is generated by the power transmission coil to enter a resonance state; and

    a control circuit that controls the position or the orientation of the power transmission coil with respect to the power transmission resonator in the direction in which a standing wave ratio in a transmission line from the power supply circuit to the power transmission coil decreases, whereinthe power supply circuit amplifies an alternating voltage by a gain according to the position or the orientation of the power transmission coil controlled by the control circuit to output an amplified alternating voltage.

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