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Wireless power transmission device and control method therefor

專利號(hào)
US10097041B2
公開日期
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.

說明書

For an example associated with the present disclosure, the wireless power transmitter may further include a wireless communication unit formed to perform communication with the receiver in a wireless manner, wherein the power transmission control unit transmits a preset amount of power and control information associated with communication to the receiver to perform communication through the wireless communication unit when the external material is a receiver that receives the wireless power.

For an example associated with the present disclosure, the power transmission control unit may transmit power to the receiver in a wireless manner when one-to-one communication with the receiver is completed.

For an example associated with the present disclosure, the power transmission control unit may receive amount-of-power information on wireless power to be received from the receiver through the connected communication to control the power supply unit so as to supply power based on the amount-of-power information.

For an example associated with the present disclosure, the power transmission control unit may suspend power that has been supplied to the receiver upon receiving alignment state information indicating that the alignment state of the receiver has been changed from the receiver through the connected communication.

For an example associated with the present disclosure, when a frequency different from a preset resonant frequency is detected subsequent to periodically generating the waveform at the specific frequency, the power transmission control unit may determine the type of an external material based on the characteristics of the different frequency.

權(quán)利要求

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