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Multiple resonant cells wireless power mats

  • US 10,236,119 B2
  • Filed: 11/22/2016
  • Issued: 03/19/2019
  • Est. Priority Date: 05/04/2012
  • Status: Active Grant
First Claim
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1. Inductive charging pad for targeting a magnetic field of a charging pad to a receiver, said inductive charging pad comprising multiple resonant cells (Cell1, Cell2, Cell3) and an AC input for connecting an AC voltage (Vac) having a frequency of operation, each resonant cell (Cell1, Cell2, Cell3) including a winding and a capacitor being connected in series, whereby the multiple resonant cells (Cell1, Cell2, Cell3) are arranged in parallel across the AC input and wherein a particular cell is adapted to passively increase its magnetic field by moving its resonance point when a secondary winding of the receiver is brought in proximity of said specific resonant cell (Cell1, Cell2, Cell3).

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