无线充电系统;WIRELESS CHARGER SYSTEM

摘要

一种包含频宽内通讯之无线充电系统，包括：一电源装置，包含：至少一发射器线圈，用于提供一无线充电电力，该无线充电电力根据至少一目标装置之反射阻抗被调变；以及该至少一目标装置，定向于且电磁耦接至该电源装置，用于接收该充电电力。目标装置包含：一接收器线圈，松散耦接至该发射器线圈，用于接收该充电电力；可变电阻，系该接收器线圈之负载；以及电力侦测及调变电路，用于决定该充电电力之大小，并根据该充电电力之大小提供调变控制信号给可变电阻，以改变可变电阻之电阻值来控制目标装置之阻抗，该阻抗会被发射至该电源装置。; and at least the target device, oriented on and magnetically coupled to the source device, for receiving the charging power. The target device includes: a receiver coil, loosely coupled to the transmitter coil, for receiving the charging power; a variable resistor loading the receiver coil; and a power detection and modulation circuit, for determining a size of the charging power, and providing a modulation control signal to the variable resistor according to the size of the charging power, for varying the resistance of the variable resistor in order to control an impedance of the target device which will be reflected at the source device.