Class E/sup 2/ DC/DC converter with second harmonic resonant class E inverter and Class E rectifier

Class E amplifiers have been used as inverters for highly efficient DC/AC energy conversion. ZVS-Class E inverters need an RF choke and ZCS-types have the turn-on switching loss increasing with operating frequency. Both types have nonzero power loss in the on-state resistance of the active switch. The second harmonic resonant Class E inverter has no RF choke and has small power dissipation in parasitic resistance since the shunt capacitor and inductor resonate at the second harmonic of the operating frequency. In this paper, a new type of Class E/sup 2/ converter is proposed and verified experimentally. It consists of the second harmonic resonant Class E inverter and a Class E rectifier. The maximum efficiency achieved was 81.8 percent at 1 MHz.<
>