US 11,916,406 B1
Techniques for wireless power systems power delivery
Wynand Malan, Auckland (NZ); and Wenwei Wang, Auckland (NZ)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jun. 2, 2022, as Appl. No. 17/830,722.
Claims priority of provisional application 63/245,052, filed on Sep. 16, 2021.
Int. Cl. H02J 50/60 (2016.01); H02J 50/90 (2016.01); H02J 50/12 (2016.01); H02J 50/40 (2016.01)
CPC H02J 50/60 (2016.02) [H02J 50/12 (2016.02); H02J 50/90 (2016.02); H02J 50/402 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A wireless power transmitting device configured to transmit wireless power signals to a wireless power receiving coil in a wireless power receiving device, comprising:
a coil configured to transmit the wireless power signals;
inverter circuitry coupled to the coil; and
control circuitry configured to:
measure an inductance for the coil and a quality factor for the coil;
determine a position of the wireless power receiving device relative to the wireless power transmitting device based at least on the measured inductance and the measured quality factor; and
determine an expected power loss associated with the coil based at least on the determined position of the wireless power receiving device.