Title:
FOREIGN OBJECT DETECTION METHOD, AND APPARATUS AND SYSTEM THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/217662
Kind Code:
A1
Abstract:
The present invention relates to a foreign object detection method, and an apparatus and system therefor. A method for foreign object detection in a wireless power transmission device according to an embodiment of the present invention may comprise the steps of: when entering a power transmission step, determining a reference current-to-voltage ratio; calculating a present current-to-voltage ratio at predetermined periods; and determining whether a foreign object is present, on the basis of the present current-to-voltage ratio and the reference current-to-voltage ratio. Therefore, the present invention has an advantage in that it is possible to detect a foreign object in the power transmission step.
Inventors:
CHAE YONG SUK (KR)
KWON YONG IL (KR)
KWON YONG IL (KR)
Application Number:
PCT/KR2017/005146
Publication Date:
December 21, 2017
Filing Date:
May 18, 2017
Export Citation:
Assignee:
LG INNOTEK CO LTD (KR)
International Classes:
G01V3/10; G01N27/20; H02J5/00
Foreign References:
KR101213649B1 | 2012-12-18 | |||
JP2014222994A | 2014-11-27 | |||
KR101183664B1 | 2012-09-17 | |||
KR20140113147A | 2014-09-24 | |||
KR20160051501A | 2016-05-11 |
Attorney, Agent or Firm:
PARK, Young Bok et al. (KR)
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