US 11,996,705 B2
Wireless power transmitter
Kyunghwan Kim, Seoul (KR); Jihyun Lee, Seoul (KR); Bongsik Kwak, Seoul (KR); and Yongcheol Park, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on May 20, 2022, as Appl. No. 17/664,400.
Application 17/664,400 is a continuation in part of application No. 17/256,624, granted, now 11,355,281, previously published as PCT/KR2018/007358, filed on Jun. 28, 2018.
Prior Publication US 2022/0285991 A1, Sep. 8, 2022
Int. Cl. H02J 50/12 (2016.01); H01F 5/00 (2006.01); H01F 38/14 (2006.01); H02J 50/40 (2016.01)
CPC H02J 50/12 (2016.02) [H01F 5/00 (2013.01); H01F 38/14 (2013.01); H02J 50/40 (2016.02)] 15 Claims
OG exemplary drawing
 
1. A wireless power transmitter transmitting wireless power to a wireless power receiver, the wireless power transmitter comprising:
a primary coil forming magnetic coupling with a secondary coil provided in the wireless power receiver and transmitting wireless power to the wireless power receiver,
wherein the primary coil is formed by spirally winding a plurality of subcoils connected electrically in parallel while keeping the subcoils in contact with each other,
wherein the subcoil is litz wire consisting of several conducting wires packed in a bundle, and
wherein the primary coil is formed by spirally winding the plurality of subcoils on a single plane.