Primary power supply tuning network for two coil device and method of operation

摘要

This disclosure provides systems, methods and apparatus for connecting and operating an AC source to a load. In one aspect a power supply topology is provided which may be of particular use in the area of wireless power transfer. The topology allows for a single source to energize one or more conductive structures configured to generate a field, improving power transfer to a power receiver.

主权项

1. A wireless power transmitter comprising:
a first conductive structure configured to generate a first field; a second conductive structure in series with the first conductive structure and configured to generate a second field; a source configured to generate a drive signal; and a circuit configured to selectively route the drive signal to either one of the first or the second conductive structures or to both of the first and the second conductive structures, and further configured to maintain a tuning of the one or both of the first and second conductive structures driven by the drive signal, wherein the circuit comprises a plurality of tuning elements and a plurality of switches, wherein a switch of the plurality of switches is configured to switch a tuning element of the plurality of tuning elements between a first state and a second state different from the first state, wherein in the first state, the tuning element is in parallel with the first conductive structure.