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POWER TRANSMISSION DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM

  • US 20160043567A1
  • Filed: 07/21/2015
  • Published: 02/11/2016
  • Est. Priority Date: 08/05/2014
  • Status: Active Grant
First Claim
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1. A power transmission device comprising:

  • power transmission coils arranged in a line such that each principal surface of the power transmission coils is in parallel to a surface of the power transmission device, the power transmission coils transmitting AC power wirelessly to a power receiving coil of a power receiving device;

    a power transmission circuit that is connected to the power transmission coils and supplies the AC power to the power transmission coils; and

    control circuitry operative to;

    switch an electrical connection state between the power transmission circuit and each of the power transmission coils,detect a relative position between the power receiving coil and each of the power transmission coils,select the power transmission coils adjacent to each other from the transmission coils based on the detected relative position, thereby fixing a number of the selected power transmission coils, andcause the power transmission circuit to supply the AC power to the selected power transmission coils,wherein in an array direction of the power transmission coils, a length Dwt of each of the power transmission coils is shorter than a maximum diameter Dwr of the power receiving coil.

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