Wireless power transmission device and control method therefor
摘要
說明書
Here, ΔP indicates an overall amount of lost power lost from the wireless power transmitter 100, and f indicates a frequency at which the LC resonant circuit is driven, and LCOIL indicates an inductor (L) value of an LC resonant circuit of the wireless power transmitter 100, and I1 indicates a first current of the inductor (L) detected at a first time point at which a first predetermined period of time (or predetermined number of cycles) has passed from a time point at which the LC resonant circuit of the wireless power transmitter 100 is driven and then suspended, and I2 indicates a second current of the inductor (L) detected at a second time point at which a second predetermined period of time (or predetermined number of cycles) has passed from a time point at which the LC resonant circuit of the wireless power transmitter 100 is driven and then suspended, and the first time point is set to be earlier than the second time point. The first and the second predetermined time is contained within a period of time from a time point at which the LC resonant circuit of the wireless power transmitter 100 is suspended to a time point at which a current of the inductor (L) is no longer detected.
