WIRELESS POWER TRANSFER VIA MAGNETICALLY COUPLED RESONANCE FOR SMALL ELECTRONIC DEVICES

Abstract

The widespread use of all kinds of small portable devices have created the demands for wireless power transfer (WPT) systems that are proper for mobile devices. In this thesis, magnetically coupled resonance (MCR) WPT systems are developed with innovative design techniques. Specifically, two MCR-WPT systems are proposed: one is symmetric while another is asymmetric. The symmetric system has a small transmitter of the same size as the receiver of 32×32×3.91 mm. The optimal charging distance is 35 mm with the maximum transfer efficiency of 32.8%. The asymmetric system has a large transmitter of 200×200×1.6 mm and the receiver size remains small. The maximum transfer efficiency is 51.8% and the optimal charging distance is 60 mm. The proposed systems are simulated using the finite element method, and then fabricated and tested. The results demonstrate that the proposed systems can enable wireless power charging of small electronics with acceptable efficiency.