SYSTEM LOAD LINE CHARACTERIZATION FOR STABILITY AND POWER NEGOTIATION

Abstract

A wireless power transmitter can include an inverter that generates an AC voltage; a wireless power transmitting coil that receives the AC voltage from the inverter, the wireless power transmitting coil being couplable to a wireless power receiving coil of a wireless power receiver; and controller circuitry that operates the inverter to deliver power wirelessly, using the wireless power transmitting coil, to the wireless power receiver by: characterizing a load line corresponding to the wireless power transmitter, the wireless power receiver, and a relative position between the wireless power transmitter and the wireless power receiver using a plurality of wireless power transfer system parameters determined by in-circuit measurements; identifying a stability boundary associated with the load line; and operating the wireless power transmitter at a power level that causes the wireless power transmitter to remain on a stable side of the stability boundary for the characterized load line.

CPC Classifications