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WIRELESS POWER TRANSMISSION UNIT AND POWER GENERATOR AND POWER GENERATION SYSTEM WITH THE WIRELESS POWER UNIT

  • US 20110037322A1
  • Filed: 08/10/2010
  • Published: 02/17/2011
  • Est. Priority Date: 08/13/2009
  • Status: Active Grant
First Claim
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1. A wireless power transmission unit comprising:

  • an oscillator for converting DC energy into RF energy having a frequency f0;

    a first antenna for transmitting the RF energy, the first antenna including a first inductor and a first capacitor that are connected together in series to form a series resonant circuit with a resonant frequency fT; and

    a second antenna for receiving, by coupling a resonant magnetic field, at least a part of the RF energy that has been transmitted by the first antenna, the second antenna including a second inductor and a second capacitor that are connected in parallel with each other to form a parallel resonant circuit with a resonant frequency fR,wherein the resonant frequencies fT and fR are set to be substantially equal to the frequency f0 of the RF energy,the oscillator has a voltage step-up ratio Voc,the first inductor has an inductance L1,the second inductor has an inductance L2, the first and second antennas have a coupling coefficient k, andthe power transmission unit satisfies (L2/L1)≧

    4(k/Voc)2.

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