APPARATUS AND METHOD FOR PERFORMING POWER CALIBRATION IN WIRELESS POWER TRANSMISSION SYSTEM

Title:

APPARATUS AND METHOD FOR PERFORMING POWER CALIBRATION IN WIRELESS POWER TRANSMISSION SYSTEM

Document Type and Number:

WIPO Patent Application WO/2019/139326

Kind Code:

A1

Abstract:

The present invention relates to an apparatus and a method for performing power calibration in a wireless power transmission system. The present specification provides a wireless power transmission apparatus comprising: a power conversion unit configured 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 to perform an initial calibration for a power parameter prior to the power transfer phase, receive a first received power packet from the wireless power receiving device indicating the power received by the wireless power receiving device during the power transfer phase, and detect foreign matter by using the received power and a first power loss determined on the basis of the initial calibration. It is possible to adaptively respond to a newly changed wireless charging environment to calibrate transmission power and reception power, and it is possible to detect foreign matter more precisely by detecting a power loss on the basis of the calibrated transmission and reception power.

Inventors:

PARK YONGCHEOL (KR)
PARK JOONHO (KR)
YOOK GYUNGHWAN (KR)

Application Number:

PCT/KR2019/000251

Publication Date:

July 18, 2019

Filing Date:

January 08, 2019

Export Citation:

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Assignee:

LG ELECTRONICS INC (KR)

International Classes:

H02J7/02; H04L1/16; H04L29/06

Foreign References:

KR20170118571A	2017-10-25
JP2015165761A	2015-09-17
KR20170140685A	2017-12-21
KR101213649B1	2012-12-18
KR20150059069A	2015-05-29

Other References: