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Wireless power transmission device and control method therefor

專利號
US10097041B2
公開日期
2018-10-09
申請人
LG ELECTRONICS INC.(KR Seoul)
發(fā)明人
Byungsang Jung; Beomseok Chae; Yongcheol Park; Kyunghwan Kim
IPC分類
H02J50/12; H02J50/80
技術(shù)領(lǐng)域
power,wireless,receiver,resonant,unit,may,coil,in,control,lc
地域: Seoul

摘要

The present specification which relates to a wireless power transmission device and a control method, capable of transmitting and receiving power wirelessly comprises a power supply unit for supplying power to a receiving device to transmit power wirelessly; and a power transmission control unit for, periodically generating a waveform with a particular frequency, measuring an attenuation coefficient of the waveform at each cycle, measuring a variation in the attenuation coefficient at each cycle, and determining the type of an external material. The present invention has a technical feature wherein the power transmission control unit determines whether to transmit power wirelessly to the receiving device on the basis of the type of the external material.

說明書

FIG. 20 is an exemplary view illustrating the heating cause of an external metal material 300 located at the wireless power transmitter 100 according to an embodiment of the present disclosure.

As illustrated in FIG. 20, when a magnetic flux (B) passes through the external metal material (conductor) 300, a current (I) in proportion to a sine value of an angle (Θ) between a surface of the external metal material 300 and the magnetic flux is induced, and the current (I) causes heating in proportion to a resistance value calculated from the resistivity coefficient (ρ) of the external metal material 300.

權(quán)利要求

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