WIRELESS POWER TRANSFER METHOD, APPARATUS AND SYSTEM

Title:

WIRELESS POWER TRANSFER METHOD, APPARATUS AND SYSTEM

Document Type and Number:

WIPO Patent Application WO/2015/194889

Kind Code:

A1

Abstract:

The present disclosure relates to a wireless power transfer method, a wireless power transfer apparatus, and a wireless charging system in a wireless power transfer field, and there is provided a foreign object detection method of a wireless power transmitter formed to transmit power to a wireless power receiver in a wireless manner, and the method may include acquiring the frequency characteristics of a current flowing through a coil within the wireless power transmitter for a predetermined period of time, detecting a peak frequency corresponding to a peak value using the acquired frequency characteristics, and comparing the peak frequency with a resonant frequency of the wireless power transmitter, and detecting whether or not the foreign object is placed on the transmitter through the comparison. In addition, the present disclosure relates to a wireless power transfer method, a wireless power transfer apparatus, and a wireless charging system in a wireless power transfer field, and there is provided a interference avoidance method of a wireless power transmitter formed to transmit power to a wireless power receiver in a wireless manner, and the method may include connecting a head unit of an automobile in a wireless manner through a communication device, receiving a first signal for avoiding interference from the head unit to stop wireless charging or change a first frequency band of the wireless charging to a second frequency band which is a different frequency band, and receiving a second signal from the head unit to resume the wireless charging or change the second frequency band to the first frequency band.

More Like This:

JP2727750	[Title of Invention] Electric Power and Signal Carrier
WO/2012/082784	WIRELESS POWER RECEIVER CIRCUITRY
WO/2012/092183	SYSTEM FOR WIRELESS POWER TRANSMISSION

Inventors:

PARK YONGCHEOL (KR)
LEE JAESUNG (KR)
SEO JEONGKYO (KR)
LEE JUNGJOON (KR)
CHAE BEOMSEOK (KR)
LEE JIHYUN (KR)
KIM KYUNGHWAN (KR)

Application Number:

PCT/KR2015/006202

Publication Date:

December 23, 2015

Filing Date:

June 18, 2015

Export Citation:

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Assignee:

LG ELECTRONICS INC (KR)

International Classes:

H02J17/00; H02J7/02

Foreign References:

US20120001493A1	2012-01-05
JP2011142769A	2011-07-21
US20090026844A1	2009-01-29
US20060071632A1	2006-04-06
JP2012175763A	2012-09-10
US20120001493A1	2012-01-05

Other References: