In-Band Signaling Within Wireless Power Transfer Systems

摘要

Systems and methods for in-band communication across a wireless power interface from a load device to a source device. The load device selectively modifies the timing of switches within a voltage rectifier coupled to an output of a receive coil within the load device that receives power from a transmit coil within the source device. The source device detects changes in the power transfer (or in the relative timing of a voltage or a current) as digital information received from the load device.

主权项

1. A method of operating a wireless power transfer system comprising a source device and a load device, the method comprising:
transferring power from the source device to the load device; and during power transfer from the source device to the load device:
determining, by the load device, a data signal to be communicated to the source device; andmodifying a timing, by the load device, of a synchronous rectifier within the load device in a pattern based on the data signal.