Patent ID: 8143746
Filing Date: 2012-03-27
Classification: H02J

Abstract:
1. A device for a wireless power transfer system, the system having a wireless power transmitter (TX) and a wireless power receiver (RX), wherein: the wireless power transmitter comprises: the wireless power receiver comprises an RX resonant circuit that resonates at an RX resonant frequency; at least one of the wireless power transmitter and the wireless power receiver comprises a power detector that measures power in the corresponding resonant circuit; at least one of the wireless power transmitter and the wireless power receiver comprises an auto-tuner that generates at least one tuning parameter based on the measured power, wherein the auto-tuner comprises: the at least one tuning parameter is used to adjust at least one of the generator frequency, the TX resonant frequency, and the RX resonant frequency; the device is one of the wireless power transmitter and the wireless power receiver; and the device comprises at least one of the power detector and the auto-tuner.