Dielectric materials for power transfer system
View Patent ↗A contactless power transfer system is proposed. The power transfer system comprises a field-focusing element comprising a dielectric material. The dielectric material comprises a composition that is selected from the family of (Ba,Sr)TiO 3 or CaCu 3 Ti 4 O 12 . The compositions of the (Ba,Sr)TiO 3 include the materials such as Ca 1-x-y Ba x Sr y Ti 1-z Cr z O 3-δ N p , wherein 0<x<1; 0<y<1; 0≦z≦0.01; 0≦δ≦1; and 0≦p≦1. The compositions of the CaCu 3 Ti 4 O 12 include the materials such as Ca 1-x-y Ba x Sr y (Ca 1-z Cu z )Cu 2 Ti 4-δ Al δ O 12-0.5δ , wherein 0≦x<0.5; 0≦y<0.5; 0≦z≦1; and 0≦δ≦0.1.
1. A power transfer system comprising:
a first coil coupled to a power source;
a second coil coupled to a load; and
a field-focusing element disposed between the first coil and the second coil and comprising a dielectric material, wherein the dielectric material comprises Ca 1-x-y Ba x Sr y (Ca 1-z Cu z )Cu 2 T 4-δ Al δ O 12-0.5δ ,
wherein 0≦x, y<0.5; 0≦z≦1; and 0≦δ≦0.1.
2. The system of claim 1 , wherein at least one of x and y is greater than 0 when δ=0.
3. The system of claim 1 , wherein x and y are both greater than 0 when δ=0.
4. The system of claim 3 , wherein x and y are both greater than 0 and z=1 when δ=0.
5. The system of claim 4 , wherein the dielectric material comprises Ba 0.01 Sr 0.2 Ca 0.79 Cu 3 Ti 4 O 12 .
6. The system of claim 1 , wherein x, y, and z are all equal to 0 and δ>0.
7. The system of claim 6 , wherein the dielectric material comprises Ca 2 Cu 2 Ti 3.94 Al 0.06 O 11.97 .
8. The system of claim 1 , wherein x+y≦0.3.
9. The system of claim 1 , wherein δ≦0.6.
10. The system of claim 1 , wherein the dielectric material further comprises zirconium.
11. The system of claim 10 , wherein the dielectric material comprises Ca 2 Cu 2 Ti 3.99 Zr 0.01 O 12 .
12. The system of claim 1 , wherein the dielectric material further comprises lanthanum.
13. The system of claim 1 , wherein the dielectric material is a polycrystalline material comprising grains and grain boundaries.
14. The system of the claim 1 , wherein the system further comprises a first coil coupled to a power source and spaced apart from the field-focusing element.
15. The system of the claim 14 , wherein the system further comprises a second coil coupled to a load and spaced apart from the field-focusing element.
16. The system of the claim 15 , wherein the field-focusing element is disposed between the first coil and second coil.
17. A power transfer system comprising:
a first coil coupled to a power source;
a second coil coupled to a load; and
a field-focusing element disposed between the first coil and the second coil and comprising a dielectric material, wherein the dielectric material comprises Ca 1-x-y Ba x Sr y Cu 3 Ti 4 O 12 ,
wherein 0<x<0.2 and 0<y<0.2.
18. The power transfer system of claim 17 , wherein the field-focusing element comprises a plurality of resonators.
19. A power transfer system comprising:
a first coil coupled to a power source;
a second coil coupled to a load; and
a field-focusing element disposed between the first coil and the second coil and comprising a dielectric material, wherein the dielectric material comprises Ca 2-x-y Ba x Sr y Cu 2 Ti 4-δ Al δ O 12-0.5δ ,
wherein 0≦x<0.2; 0≦y<0.2; and 0<δ≦0.1.
20. The power transfer system of claim 19 , wherein the field-focusing element comprises a plurality of resonators.