Title:
METHOD FOR DETECTING FOREIGN OBJECT AND APPARATUS FOR SAME
Document Type and Number:
WIPO Patent Application WO/2018/105915
Kind Code:
A1
Abstract:
A method for detecting a foreign object in a wireless power transmitter, which wirelessly transmits power to a wireless power receiver through a resonant circuit included therein, according to one embodiment of the present invention may comprise the steps of: measuring the strength of power transmitted through the resonant circuit in a power transmission step; receiving, from the wireless power receiver, a feedback packet including information on a received signal strength; determining whether the information on the received signal strength is normal; when it is determined that a received power strength corresponding to the information on the received signal strength is abnormal, correcting the received power strength by applying a predetermined offset thereto; calculating a path loss on the basis of the measured strength of the transmitted power and the corrected received power strength; and detecting a foreign object by comparing the calculated path loss with a path loss threshold.
Inventors:
CHAE YONG SUK (KR)
Application Number:
PCT/KR2017/012877
Publication Date:
June 14, 2018
Filing Date:
November 14, 2017
Export Citation:
Assignee:
LG INNOTEK CO LTD (KR)
International Classes:
H02J50/60; H02J7/02; H02J50/12
Domestic Patent References:
| WO2015069780A1 | 2015-05-14 |
Foreign References:
| US20160006263A1 | 2016-01-07 | |||
| KR20140104242A | 2014-08-28 | |||
| KR20150059069A | 2015-05-29 | |||
| KR20130002992A | 2013-01-08 |
Other References:
See also references of EP 3553915A4
Attorney, Agent or Firm:
LEE, Seung Chan et al. (KR)
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