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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(shū)

FIG. 13 illustrates the operation phases of the wireless power transmitter 100 and the wireless power receiver 200 according to the embodiments disclosed herein. Furthermore, FIGS. 14 to 18 illustrate the structures of packets including a power control message between the wireless power transmitter 100 and the wireless power receiver 200.

Referring to FIG. 13, the operation phases of the wireless power transmitter 100 and the wireless power receiver 200 for wireless power transfer may be divided into a selection phase (state) 610, a ping phase 620, an identification and configuration phase 630, and a power transfer phase 640.

The wireless power transmitter 100 detects whether or not objects exist within a range that the wireless power transmitter 100 can transmit power in a wireless manner in the selection state 610, and the wireless power transmitter 100 sends a detection signal to the detected object and the wireless power receiver 200 sends a response to the detection signal in the ping state 620.

Furthermore, the wireless power transmitter 100 identifies the wireless power receiver 200 selected through the previous states and acquires configuration information for power transmission in the identification and configuration state 630. The wireless power transmitter 100 transmits power to the wireless power receiver 200 while controlling power transmitted in response to a control message received from the wireless power receiver 200 in the power transfer state 640.

Hereinafter, each of the operation phases will be described in detail.

權(quán)利要求

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