Investigation of Improved Methods in Power Transfer Efficiency for Radiating Near-Field Wireless Power Transfer

Figure 18

Efficiency of the considered WPT systems. Three different systems are considered: a WPT system with two transmitters, phase difference, and voltage ratio optimized for each separation (solid line); a WPT system with two transmitters and phase difference optimized for each separation (dashed line); the classical WPT system shown in Figure 5(b) (dotted line).