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METHOD AND SYSTEM FOR WIRELESS POWER SUPPLY

  • US 20150311726A1
  • Filed: 04/13/2015
  • Published: 10/29/2015
  • Est. Priority Date: 04/23/2014
  • Status: Active Grant
First Claim
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1. A method for wireless power supply in which power is supplied wirelessly from a power transmission antenna to a power reception antenna, the power transmission antenna including a plurality of power transmission antenna elements, and the power reception antenna including a plurality of power reception antenna elementswhereina power transmission surface of the power transmission antenna and a power reception surface of the power reception antenna are parallel and opposite to each other, anda reflector is provided outside the power reception surface and inwardly inclined at a predetermined angle with respect to the power reception surface,wherein the method includes a misalignment correction operation prior to a wireless power supply operation, andduring the misalignment correction operation, the method comprises:

  • allowing at least two, of the plurality of power transmission antenna elements, disposed at periphery of the power transmission surface of the power transmission antenna to function as position-detection power transmission antennas, and allowing antenna elements, of the plurality of power transmission antenna elements, disposed inside the position-detection power transmission antennas on the power transmission surface to function as position-detection power reception antennas;

    radiating an electromagnetic wave from the position-detection power transmission antennas to the power reception antenna;

    calculating electric power of the electromagnetic wave reflected by the reflector and then received by the position-detection power reception antennas;

    detecting a positional relation between the power transmission antenna and the power reception antenna based on the calculated electric power; and

    correcting a relative position between the power transmission antenna and the power reception antenna based on the detected positional relation.

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