Existence of Lossy Objects through Power Transmission Path of Resonator-Coupled Type Wireless Power Transfer System

The influence of lossy objects for the Resonator-Coupled type Wireless Power Transfer (RC-WPT) system by using single-spiral and dual-spiral resonators has been studied. Up to now, the resonant frequency of single-spiral and dual-spiral resonators have been set as the same but the size of them have not been set equal in our RC-WPT system. In this paper, another single-spiral and dual-spiral resonators whose resonant frequency and diameters are the same have been refabricated and the influence of lossy objects located on power transmission path for the RC-WPT system with new single-spiral and dual-spiral resonators has been re-compared. From the experimental results, it has been presented that the RC-WPT system with lossy objects using dual-spiral resonator has shown better performance than the system using single-spiral resonator.