Systems, methods, and apparatus for integrated tuning capacitors in charging coil structure
View Patent ↗Systems, methods, and apparatus are disclosed for power transfer including a plurality of coil structures located over a ferrite element, the plurality of coil structures configured to generate a high flux region and a low flux region, the low flux region being located between the plurality of coil structures, and a tuning capacitance located directly over the ferrite element in the low flux region.
1. A device for power transfer, comprising:
a plurality of coil structures located over a ferrite element, the plurality of coil structures configured to generate a high flux region and a low flux region, the low flux region being located between the plurality of coil structures; and
a tuning capacitance located directly over the ferrite element in the low flux region.
2. The device of claim 1 , wherein the plurality of coil structures are “D” shaped.
3. The device of claim 1 , wherein the plurality of coil structures comprise multiple vertically stacked coils.
4. The device of claim 1 , wherein the low flux region is dependent on an amount of current present in the plurality of coil structures.
5. The device of claim 1 , wherein the tuning capacitance comprises a plurality of surface mount capacitors located on a printed circuit board located between the plurality of coil structures directly over the ferrite element in the low flux region.
6. The device of claim 1 , wherein an electrical characteristic of the high flux region defines an electrical characteristic of the low flux region.
7. The device of claim 1 , wherein the high flux region is formed by a plurality of high flux regions in an absence of a charging-receiving structure.
8. The device of claim 1 , wherein the high flux region is formed by a plurality of high flux regions in a presence of a charging-receiving structure.
9. A method for power transfer, comprising:
locating a plurality of coil structures over a ferrite element;
generating a high flux region and a low flux region, the low flux region being located between the plurality of coil structures; and
locating a tuning capacitance directly over the ferrite element in the low flux region.
10. The method of claim 9 , further comprising forming the plurality of coil structures as “D” shaped.
11. The method of claim 9 , further comprising forming the plurality of coil structures as multiple vertically stacked coils.
12. The method of claim 9 , wherein the low flux region is dependent on an amount of current present in the plurality of coil structures.
13. The method of claim 9 , further comprising forming the tuning capacitance as a plurality of surface mount capacitors located on a printed circuit board located between the plurality of coil structures directly over the ferrite element in the low flux region.
14. The method of claim 9 , further comprising using an electrical characteristic of the high flux region to define an electrical characteristic of the low flux region.
15. The method of claim 9 , further comprising forming the high flux region using a plurality of high flux regions in an absence of a charging-receiving structure.
16. The method of claim 9 , further comprising forming the high flux region using a plurality of high flux regions in a presence of a charging-receiving structure.
17. A device for power transfer, comprising:
means for generating a high flux region and a low flux region, the low flux region being located between a plurality of coil structures; and
means for locating a tuning capacitance directly over a ferrite element in the low flux region.
18. The device of claim 17 , further comprising means for forming the plurality of coil structures as “D” shaped.
19. The device of claim 17 , further comprising means for forming the high flux region using a plurality of high flux regions in an absence of a charging-receiving structure.
20. The device of claim 17 , further comprising means for forming the high flux region using a plurality of high flux regions in a presence of a charging-receiving structure.