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NON-CONTACT POWER TRANSMISSION DEVICE DRIVE METHOD AND NON-CONTACT POWER TRANSMISSION DEVICE

  • US 20150042171A1
  • Filed: 02/28/2013
  • Published: 02/12/2015
  • Est. Priority Date: 03/09/2012
  • Status: Active Grant
First Claim
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1. A method for driving a contactless power transmission device including a setting surface, which includes a power supplying area, and a primary side circuit, which is located in the power supplying area and formed by a primary coil and a capacitor, wherein when an electric instrument is set in the power supplying area, the contactless power transmission device excites the primary coil located in the power supplying area and produces electromagnetic induction at a secondary coil of a power receiving device arranged in the electric instrument to supply power to the electric instrument, the method comprising:

  • exciting the primary coil selectively using a first resonance frequency, which is in the proximity of a frequency determined by the primary coil and the capacitor located in the primary side circuit, and a second resonance frequency, which is in the proximity of a frequency determined by an inductance component and a capacitance component of the electric instrument when the primary coil is opposed to the secondary coil.

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