Constant-Current-Output and High-Efficiency Class E Inverter with Wide-Range Load

wireless charging always suffers efficiency degradation from load variation, which seriously constrains its wide application. In this research, a T-match network is introduced in Class-E inverter to achieve high efficiency by compressing wide-range equivalent impendence from load variations. In the meantime, optimization of capacitors among the T-match is conducted to maintain constant current output. In Advanced Design System(ADS), The improved Class E with T-match at 6.78MHz achieve power output ranging from 10 to 45 W, a constant current output of 1.4 A, and a transmission efficiency exceeding 85% under load variations from 10Ω to 50 Ω in the experiment.