US 12,249,848 B2
Integrated transmitter-transformer for wireless charging
Mohammad Ali Saket Tokaldani, Vancouver (CA); and Eric Heindel Goodchild, Phoenix, AZ (US)
Assigned to AIRA, INC., Phoenix, AZ (US)
Filed by AIRA, INC., Chandler, AZ (US)
Filed on Feb. 23, 2022, as Appl. No. 17/678,902.
Claims priority of provisional application 63/153,366, filed on Feb. 24, 2021.
Prior Publication US 2022/0271570 A1, Aug. 25, 2022
Int. Cl. H01F 27/28 (2006.01); H02J 50/00 (2016.01); H02J 50/10 (2016.01); H02J 50/40 (2016.01)
CPC H02J 50/402 (2020.01) [H02J 50/005 (2020.01); H02J 50/10 (2016.02)] 16 Claims
OG exemplary drawing
 
1. A charging device, comprising:
a power transmitting coil configured to produce an electromagnetic flux centered on an axis that is substantially perpendicular to a planar magnetic core;
a transformer located adjacent to the planar magnetic core, wherein the transformer comprises a magnetic half-core that contacts the planar magnetic core such that the planar magnetic core completes a magnetic path through the magnetic half-core;
a driver circuit configured to use a stepped-up voltage received from the transformer to provide a charging current to the power transmitting coil;
one or more printed circuit boards, each of the one or more printed circuit boards having a hole configured to allow a center post of the magnetic half-core to pass through the one or more printed circuit boards;
a primary winding that includes a trace on a first metal layer provided by the one or more printed circuit boards; and
a secondary winding that includes a trace on a second metal layer provided by the one or more printed circuit boards.