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Wireless power transmission device and control method therefor

專利號(hào)
US10097041B2
公開(kāi)日期
2018-10-09
申請(qǐng)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(shuō)明書

First, when the wireless power receiver 200 is connected to the wireless power transmitter 100, the transmission control unit 112 transmits wireless power to the wireless power receiver 200, and then temporarily suspends the operation of the LC resonant circuit of the wireless power receiver 200 in a periodic manner or when a period of time set by the user has passed (S21). For example, when the wireless power receiver 200 is connected to the wireless power transmitter 100, the transmission control unit 112 transmits wireless power to the wireless power transmitter 100, and then temporarily suspends the operation of the LC resonant circuit of the wireless power receiver 200 during a period of time for detecting the existence or non-existence of the external metal material 300.

The transmission control unit 112 suspends the operation of the LC resonant circuit of the wireless power receiver 200, and also temporarily suspends the operation of the LC resonant circuit of the wireless power transmitter 100 (S22).

The transmission control unit 112 temporarily suspends the operation of the LC resonant circuit of the wireless power receiver 200 and the LC resonant circuit of the wireless power transmitter 100, and detects an attenuation factor of resonant energy of the LC resonant circuit of the wireless power transmitter 100 (S23).

權(quán)利要求

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