Transmitter of wireless power transmission system for transmitting power to battery of small electrical device, has control device that controls amplitude of reciprocating current based on alteration of inductance of transmitter coil

摘要

The transmitter (105) has a resonance circuit (115) comprising transmitter coil (120) for providing electromagnetic alternating field and a control unit (125) for providing a reciprocating current through the transmitter coil. A control device (165) is used for controlling amplitude of the reciprocating current in dependence of an alteration of the inductance of the transmitter coil. Independent claims are included for the following: (1) wireless power transmission system; and (2) method for controlling transmitter for wireless transfer of power.