Multiple resonant cells wireless power mats
First Claim
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).
2 Assignments
0 Petitions
Accused Products
Abstract
A method of configuring windings in an inductive charging pad array by using capacitors for impedance control and configuring windings to reduce the stray magnetic fields produced.
-
Citations
16 Claims
- 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).
- 8. Inductive charging pad for targeting a magnetic field of the 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 parallel, whereby the multiple resonant cells (Cell1, Cell2, Cell3) are arranged in series 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).
- 14. Inductive charging pad for targeting a magnetic field of the 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 series 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).
Specification