US 11,935,692 B2
Dynamic multi-coil tuning
Eric Heindel Goodchild, Phoenix, AZ (US); and John Winters, Chandler, AZ (US)
Assigned to AIRA, INC., Chandler, AZ (US)
Filed by AIRA, INC., Chandler, AZ (US)
Filed on Oct. 11, 2022, as Appl. No. 17/963,481.
Application 17/963,481 is a continuation of application No. 17/140,948, filed on Jan. 4, 2021, granted, now 11,469,041.
Claims priority of provisional application 62/957,420, filed on Jan. 6, 2020.
Prior Publication US 2023/0215623 A1, Jul. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01F 38/14 (2006.01); H02J 7/02 (2016.01); H02J 50/12 (2016.01); H02J 50/40 (2016.01)
CPC H01F 38/14 (2013.01) [H02J 7/02 (2013.01); H02J 50/12 (2016.02); H02J 50/40 (2016.02)] 5 Claims
OG exemplary drawing
 
1. A method for operating a wireless charging device, comprising:
providing a charging current to a resonant circuit when the resonant circuit includes a first transmitting coil of the wireless charging device;
coupling a second transmitting coil of the wireless charging device to the resonant circuit;
determining a change in impedance of the resonant circuit after coupling the second transmitting coil to the resonant circuit;
modifying frequency of the charging current responsive to the change in the impedance of the resonant circuit, wherein the charging current is provided at a first frequency before the second transmitting coil is coupled to the resonant circuit and provided at a second frequency after the second transmitting coil is coupled to the resonant circuit; and
using a lookup table to determine the second frequency.