公开(公告)号：US20230163635A1

公开(公告)日：2023-05-25

申请号：US17982855

申请日：2022-11-08

Applicant: Samsung Electronics Co., Ltd.

Inventor： Hyunsu KIM ,  Inyeong JANG ,  Donghyuk CHOI ,  Sungwoo MOON ,  Youso CHEON

IPC: H02J50/12 ,  H02J50/60 ,  H02J50/80

CPC classification number: H02J50/12 ,  H02J50/60 ,  H02J50/80

Abstract: A wireless power transmission device includes a converter circuit configured to generate a test signal having a test frequency based on an input current generated from a power source, a resonant tank configured to transmit wireless power in response to the test signal, a current sensing circuit configured to sense the input current when the wireless power is transmitted, and a controller configured to control the converter circuit to generate a test signal, calculate a quality factor of the resonant tank based on the sensed input current, reset the test frequency according to a comparison result between the quality factor and a stored reference quality factor, and control the converter circuit to reset the test frequency or transmit a digital ping signal to the wireless power reception device according to a result of comparing the quality factor with the stored reference quality factor.