Smart multicoil inductively-coupled array for wireless power transmission
A power surface or chamber having nearly constant electromagnetic field distribution in 3D comprising at least one primary coil and one primary resonance array made of several coils connected in parallel for generating the electromagnetic field distribution; a single power driver circuit for activating the coils; and a secondary coil and an optional secondary resonance coil to recover the generated electromagnetic field and power up an electric device.
1. A power transmission system for wirelessly charging a load comprising:
a power driver circuit;
a wireless power transmitter having:
a transmitter primary inductive unit coupled to said power driver circuit and configured to generate an alternating magnetic field;
a transmitter primary resonator receiving electrical power from the transmitter primary inductive unit by electromagnetic induction, said transmitter primary resonator including n inductive elements electrically connected together in parallel to form an array, a subset m of said n inductive elements being in mutual inductance with said transmitter primary inductive unit;
a wireless power receiver having:
a receiver secondary inductive unit for receiving electric power by magnetic field resonance;
a load electrically connected to and being supplied by said wireless power receiver;
wherein said wireless power transmitter and said wireless power receiver are in mutual inductance.
2. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said wireless power receiver further comprises
a receiver secondary resonator in mutual inductance with said receiver secondary inductive unit.
3. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said inductive element is a coil.
4. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said array of n inductive elements forms a power surface.
5. The resonance-based inductive power transmission system as claimed in claim 1 , further comprising two of said array of n inductive elements provided facing one another at a distance from one another to form a power chamber.
6. The resonance-based inductive power transmission system as claimed in claim 1 , wherein at least two of said n inductive elements overlap.
7. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said transmitter primary resonator further includes groups of inductive elements electrically connected in parallel to form parallel groups of arrays.
8. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said load is a power storage unit.
9. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said n inductive elements of said transmitter primary resonator have matching electrical characteristics.
10. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said n inductive elements of said transmitter primary resonator are tuned to a same resonance frequency.
11. The resonance-based inductive power transmission system as claimed in claim 1 , wherein said wireless power transmitter and said wireless power receiver are tuned to a same resonance frequency.