Wireless power transmission device and control method therefor
摘要
說明書
Moreover, the transmission control unit 112 may deduce a capacitance of the capacitor of the receiver as well as the alignment state using a waveform having the additional frequency. More specifically, the transmission control unit 112 may deduce a capacitance of the capacitor of the receiver using the mutual inductance value and additional frequency value. Through this, the transmission control unit 112 may determine an amount of wireless power to be transmitted to the receiver.
Furthermore, an additionally detected frequency may vary according to the type of the external material. For example, since the structure of kitchen appliances and heating devices including a motor is different from that of a receiver receiving wireless power, a different frequency may be detected on a coil for power transmission of the transmitter. As a result, the transmission control unit 112 may detect the type of an external material using the characteristics of detecting the different frequency. Through this, the transmission control unit 112 may control the power supply unit 190 to transmit wireless power according to the characteristics of the receiver.
As described above, a wireless power transmitter according to an embodiment of the present disclosure may determine a type of the receiver and an alignment state of the receiver as well as a capacitance of the receiver using at least one of a variation of attenuation factor of a waveform and a waveform having an additional frequency.
