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Patent Searching and Data


Title:
DEVICE AND METHOD FOR PERFORMING POWER CALIBRATION IN WIRELESS POWER TRANSMISSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/208960
Kind Code:
A1
Abstract:
The present invention relates to a device and a method for performing power calibration in a wireless power transmission system. The present specification provides a wireless power transmission device comprising: a power conversion unit configured so as to transmit, in a power transfer phase, wireless power generated on the basis of magnetic coupling to a wireless power receiving device; and a communication/control unit configured so as to perform an initial calibration for a power parameter prior to the power transfer phase, receive, from the wireless power receiving device, a first received power packet indicating the power received by the wireless power receiving device during the power transfer phase, and detect a foreign object by using the received power and a first power loss determined on the basis of the initial calibration. Transmitted power and received power may be calibrated by adaptively responding to a newly changed wireless charging environment, and on the basis thereof, a power loss may be detected so as to enable the more precise detection of a foreign object.

Inventors:
PARK, Yongcheol (IP Center, LG Electronics Inc.19, Yangjae-daero 11-gil,Seocho-gu, Seoul, 06772, KR)
Application Number:
KR2019/004329
Publication Date:
October 31, 2019
Filing Date:
April 11, 2019
Export Citation:
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Assignee:
LG ELECTRONICS INC. (128 Yeoui-daero, Yeongdeungpo-guSeoul, 07336, KR)
International Classes:
H02J50/60; H02J7/02; H04L1/16; H04L29/06
Foreign References:
KR20140104242A2014-08-28
KR20140008975A2014-01-22
US20110025265A12011-02-03
KR20140113147A2014-09-24
KR20170012959A2017-02-06
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (5F 124, Teheran-roGangnam-gu, Seoul, 06234, KR)
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