High efficiency and power transfer in wireless power magnetic resonators

Abstract

Described herein are embodiments of a wireless power system that include a signal generator, having a connection to a source of power, and 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, 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.

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.