Wireless power transmission device and control method therefor
摘要
說明書
The transmission control unit 112 may determine whether or not the external material is a receiver capable of receiving power in a wireless manner. At this time, when the external material is a receiver capable of receiving power in a wireless manner, the transmission control unit 112 may control the power supply unit 190 to transmit power to the receiver. Furthermore, when the external material is a receiver incapable of receiving power in a wireless manner, the transmission control unit 112 may control the power supply unit 190 not to transmit power to the receiver.
Furthermore, the transmission control unit 112 may detect the type of the external material based on a waveform, which is detected from the coil for power transmission, having an additional frequency different from a resonant frequency of the wireless power transmitter.
For example, the transmission control unit 112 may detect a waveform having an additional frequency different from an inherent resonant frequency basically provided by the wireless power transmitter for a frequency of a waveform sensed at the coil for power transmission.
Here, the additional frequency value may be a value depending on a mutual inductance value between coils provided in the transmitter and receiver, respectively. At this time, since the additional frequency value depends on a mutual inductance value, the transmission control unit 112 may determine an alignment state between the transmitter and the receiver based on the additional frequency value. The alignment state may denote a state in which the transmitter is placed at a location that is suitable for transmitting power to the receiver in a wireless manner.
