HIGH EFFICIENCY AND POWER TRANSFER IN WIRELESS POWER MAGNETIC RESONATORS

1 . A wireless power system, comprising:

a signal generator, having a connection to a source of power, and which creates a substantially unmodulated signal at a first frequency; and

a transmitting high-Q resonator, generating a magnetic field having said first frequency and based on power created by said signal generator;

a receiving high-Q resonator, receiving a magnetic power signal created by said transmitting resonator, said receiving resonator being a distance greater than 1 m spaced from said transmitting resonator, and

a load receiving part, receiving power from said receiving resonator;

wherein a transfer efficiency between said transmitting resonator and said receiving resonator is greater than 25% at 1 m of distance between said transmitting resonator and said receiving resonator.

2 . A system as in claim 1 , wherein said transmitting resonator transmits a power of 25 W.

3 . A system as in claim 1 , wherein said transfer efficiency is greater than 25% at 1.5 m distance between said transmitting resonator and said receive resonator.

4 . A system as in claim 1 , wherein said transmitter resonator is a capacitively loaded dipole, and said receive resonator is a capacitively loaded dipole.

5 . The system as in claim 1 , further comprising a coupling loop, on the transmitting resonator, coupled directly to said signal generator, and unconnected by any wire connection to said transmitting resonator.

6 . The system as in claim 5 , further comprising a coupling loop, coupled between said receiving electronics and said receiving resonator, such that said receiving electronics are not directly connected by any wire to said receiving resonator.

7 . The system of claim 1 , further comprising a tuning loop, movable relative to said receiver, and said movement effecting a resonant frequency of said receiver.

8 . A method of transmitting power wirelessly, comprising:

creating a substantially unmodulated signal at a first frequency based on power from a power source; and

using a transmitting high-Q resonator to generate a magnetic field having said first frequency and based on said power from said power source;

wirelessly receiving the magnetic field created by said transmitting resonator at a distance greater than 1 m spaced from said transmitting resonator, and

coupling power from said receiving, to a load, with a transfer efficiency between said transmitting resonator and said receiving high-Q resonator greater than 25%.

9 . A method as in claim 8 , wherein said transmitting resonator transmits a power of 25 W.

10 . A method as in claim 8 , wherein said transfer efficiency is greater than 25% at 1.5 m distance between said transmitting resonator and said receiving resonator.

11 . A method as in claim 8 , wherein said transmitter resonator is a capacitively loaded dipole, and said receive resonator is a capacitively loaded dipole.

12 . The method as in claim 8 , further comprising using a coupling loop, on the transmitting resonator, between said signal generator and said transmitting resonator, such that said signal generator is not directly connected by a wire to said transmitting resonator.

13 . The method as in claim 8 , wherein the signal generator is an RF generator.

14 . The method as in claim 12 , further comprising using a coupling loop, coupled between said receiving electronics and said receiving resonator, such that said receiving electronics are not directly coupled to said receiving resonator.

15 . The method as in claim 8 , further comprising moving a tuning loop, movable relative to said receiver, wherein a resonant frequency of said receiver is changed by said moving.

16 . A wireless power system, comprising:

a signal generator, having a connection to a source of power, which creates a substantially unmodulated signal at a first frequency;

a transmitting high-Q resonator, generating a magnetic field having said first frequency and based on power created by said signal generator;

a receiving high-Q resonator, receiving a magnetic power signal created by said transmitting resonator, and said receiving resonator being a distance greater than 1 m spaced from said transmitting resonator; and

a load receiving part, receiving power from said receiving resonator;

wherein said load receives a power of at least 2½ Watts at a distance of 1½ meters from said transmitting resonator.

17 . A system as in claim 16 , wherein said transmitting resonator transmits a power of 25 W.

18 . A system as in claim 16 , wherein said transmitter resonator is a capacitively loaded dipole, and said receive resonator is a capacitively loaded dipole.

19 . The system as in claim 16 , further comprising a coupling loop, on the transmitting resonator, coupling directly to said signal generator, and unconnected by any wire connection to said transmitting resonator.

20 . The system as in claim 16 , further comprising a coupling loop, coupled between said receiving electronics and said receiving resonator, such that said receiving electronics are not directly connected by any wire to said receiving resonator.

21 . The system as in claim 16 , further comprising a tuning loop, movable relative to said receiver, and said movement affecting a resonant frequency of said receiver.

22 . A system as in claim 1 , wherein said transmitting and said receive high-Q resonators are both capacitively loaded.

23 . A method as in claim 8 , wherein said transmitting and said receive high-Q resonators are both capacitively loaded.

24 . A system as in claim 16 , wherein said transmitting and said receive high-Q resonators are both capacitively loaded.