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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

When the wireless power receiver 200 is connected to the wireless power transmitter 100, the transmission control unit 112 generates a control signal (control signal for setting to PT=0) for suspending the operation of the LC resonant circuit of the wireless power receiver 200, and transmits the control signal (control signal for setting to PT=0) to the wireless power receiver 200. The wireless power receiver 200 suspends the operation of its own LC resonant circuit based on the control signal (control signal for setting to PT=0) (set to PT=0). The transmission control unit 112 may generate a control signal for suspending the operation of the LC resonant circuit of the wireless power receiver 200 and transmit the control signal to the wireless power receiver 200 in a periodic manner or whenever a period of time set by the user has passed to detect the existence or non-existence of the external metal material 300 and/or an amount of power consumed due to the external metal material 300.

Hereinafter, a method of setting PT=0 will be described with reference to FIGS. 24 and 25.

FIG. 24 is an exemplary view illustrating a circuit for setting PT=0.

權(quán)利要求

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