US 12,218,522 B2
Layered double-D coil for wireless power transfer systems
Muhammad E. Bima, Atlanta, GA (US); and Indranil Bhattacharya, Cookeville, TN (US)
Assigned to Tennessee Technological University, Cookeville, TN (US)
Filed by Tennessee Technological University, Cookeville, TN (US)
Filed on Nov. 17, 2023, as Appl. No. 18/513,098.
Application 18/513,098 is a continuation of application No. 17/554,119, filed on Dec. 17, 2021, granted, now 11,837,884.
Claims priority of provisional application 63/126,944, filed on Dec. 17, 2020.
Prior Publication US 2024/0097500 A1, Mar. 21, 2024
Int. Cl. H02J 50/40 (2016.01); H01F 27/36 (2006.01); H02J 50/10 (2016.01); H02J 50/70 (2016.01)
CPC H02J 50/402 (2020.01) [H01F 27/366 (2020.08); H02J 50/10 (2016.02); H02J 50/70 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A wireless power transfer device, comprising:
a transmitter coil comprising a first coil layer and a second coil layer, each coil layer including two coil windings, each coil winding wound about an axis;
wherein the axes are parallel to each other; and
wherein each coil winding is connected in series and wound in the same rotational direction with respect to the direction of current flow through each coil winding.