Matching networks, inductors, and coupled-inductor capacitive wireless power transfer circuit and related techniques
In one implementation, a matching network is provided comprising a pair of input terminals; a pair of output terminals; and at least two reactive components disposed between the pair of input terminals and the pair of output terminals. At least one of the reactive components comprises a coupled-inductor. In various implementations, the second reactive component can be a capacitor, and the capacitor can be at least partially realized using the parasitic capacitances of the environment. The matching network may be disposed in a capacitive wireless power transfer (WPT) system. In other implementations, inductors and coupled-inductors are further provided. In some implementations, for example, an inductor, such as but not limited to a coupled-inductor, may comprise a toroidal or semi-toroidal core comprising foil wire interleaved without notches.
1. A matching network comprising:
a pair of input terminals;
a pair of output terminals;
at least two reactive components disposed between the pair of input terminals and the pair of output terminals,
wherein one of the reactive components comprises a coupled-inductor, the second reactive component is a capacitor, and the capacitor is at least partially realized using the parasitic capacitances of the environment,
wherein the coupled-inductor is wound on a semi-toroid core or a toroid core.
2. The matching network of claim 1 , wherein the matching network is disposed in a capacitive wireless power transfer (WPT) system.
3. The matching network of claim 2 , wherein the coupled-inductor comprises flat wire.
4. The matching network of claim 2 , wherein the coupled-inductor is wound on a semi-toroid core with interleaved-foil wire.
5. The matching network of claim 2 , wherein the coupled-inductor is wound on a toroid core with interleaved-foil wire.
6. The matching network of claim 1 , wherein the coupled-inductor comprises flat wire.
7. The matching network of claim 1 , wherein the coupled-inductor comprises two or more parallel windings.
8. The matching network of claim 1 , claim 2 , wherein the coupled-inductor comprises two or more parallel windings.
9. The matching network of claim 1 , wherein the coupled-inductor is wound on a semi-toroid core with interleaved-foil wire.
10. The matching network of claim 1 , wherein the coupled-inductor is wound on a toroid core with interleaved-foil wire.
11. The matching network of claim 1 , wherein the matching network comprises a multi-stage matching network utilizing coupled inductors.
12. The matching network of claim 11 , wherein the coupled inductors are coupled in-between the multiple stages of the matching network.