公开(公告)号：US11381117B2

公开(公告)日：2022-07-05

申请号：US16797483

申请日：2020-02-21

Applicant: LG ELECTRONICS INC.

Inventor： Hyengcheul Choi ,  Seong Hun Lee ,  Bongsik Kwak ,  Hyung Geol Kwak

IPC: H02J50/50 ,  H02J50/10 ,  H02J50/70 ,  H01F38/14 ,  H02J7/02

Abstract: Disclosed herein is a wireless charging apparatus for preventing cancelation of magnetic fields generated between a plurality of adjacent transmission coils by placing a repeater on the plurality of transmission coils, the wireless charging apparatus including a plurality of transmission coils spaced the same distance apart from a reference point, and a repeater placed on the plurality of transmission coils to be overlapped with each of the plurality of transmission coils with respect to the reference point that is a center, wherein a coupling coefficient between each of the plurality of transmission coils and the repeater is higher than a coupling coefficient between the plurality of transmission coils.