Patent ID: 11955818
Assignee: ELECTDIS AB
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for providing operational feedback during power transfer in a wireless power transfer system that comprises a power transmit device arranged to transfer power over an inductive wireless power transfer interface operating at a transmit frequency, fTX, to a power receive device, the wireless power transfer system being adapted to transfer information at half duplex using Frequency Shift Keying, FSK, in one direction and Amplitude Shift Keying, ASK, in the other direction, the method comprising:
transferring, at the transmit frequency, fTX, by the power transmit device, power to the power receive device and, during the transferring:
transmitting, at the transmit frequency, fTX, by one of the power transmit device or the power receive device, a first data packet to the other of the power transmit device or the power receive device using one of two modulation types being FSK or ASK,
receiving, by the other of the devices, the first data packet and, during the receiving and if a signaling condition is determined to be fulfilled, transmitting, at the transmit frequency, fTX, by the other of the devices to said one of the devices, operational information using the other of said modulation types.