Research on driving source of wireless power transfer under weak coupling condition

In order to enhance system sender quality factors under the condition of weak coupling wireless power transmission, and to increase system power as well as efficiency, a triple coil weak coupling power transmission model is proposed in this study. A novel matching adjustment method for impedance networks is also proposed, in which a Class-E power amplifier is the system driving source. The proposed method enhances coil quality factor while balancing the unload quality factor effectively. Comparison between simulated and experiment results verified the effect of system soft switching on different equivalent load.