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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

Accordingly, the present disclosure describes an apparatus and a method thereof for measuring a substantial amount of power capable of causing the heating of the external metal material 300 from wireless power transmitted from the wireless power transmitter 100. Furthermore, the present disclosure also describes an apparatus and a method thereof for measuring a substantial amount of power capable of causing the heating of the external metal material 300 only on the wireless power transmitter 100 in a circumstance with no effect of the wireless power receiver 200 to solve a compatibility problem. For example, the present disclosure determines the existence or non-existence of an external metal material capable of causing heating based on an amount of attenuation of resonant energy of the wireless power transmitter 100 when the operation of the transmitting coil 1111 is suspended in the wireless power transmission system 100, 200 using the linkage flux. Furthermore, it is set to a condition that the energy of the wireless power receiver 200 is not consumed to remove the effect of the wireless power receiver 200.

FIG. 21 is an exemplary view illustrating an external metal material located between the wireless power transmitter 100 and the wireless power receiver 200 using a linkage flux according to an embodiment of the present disclosure.

權(quán)利要求

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