Wireless power transmission device and control method therefor
摘要
說明書
According to the present disclosure, there is disclosed a method of controlling a wireless power transmitter configured to transmit wireless power to an electronic device to which a wireless power receiver is applied, the control method may include generating a drive signal to supply power for the operation of the electronic device; forming a wireless power signal based on a switching operation due to an input voltage and the drive signal to transmit wireless power to the wireless power receiver; detecting power lost due to an external metal material; and outputting information indicating the detected power.
According to the present disclosure, there is disclosed a wireless power transmitter capable of transmitting and receiving power in a wireless manner, and the wireless power transmitter may include a power supply unit configured to supply power to transmit power to a receiver in a wireless manner, and a power transmission control unit configured to periodically generate a waveform at a specific frequency to measure an attenuation factor of the waveform for each period, and measure a variation of the attenuation factor for the each period to determine the type of an external material, wherein the power transmission control unit determines whether or not to transmit power to the receiver in the wireless manner based on the type of the external material.
For an example associated with the present disclosure, the power transmission control unit may detect a variation of an attenuation factor changed according to the period of the waveform, and determine the external material as a receiver that receives power in the wireless manner to transmit power to the receiver in a wireless manner when the variation of the attenuation factor corresponds to a preset reference variation.
