Analysis and design of generalized class-E rectifier

Abstract

This paper presents a semi-analytical expression of the generalized class-E rectifier. Effect of low output-filter inductance is included in the theoretical formula presented in this paper. The harmonic components are considered in the current flowing through the output-filter inductance. For obtaining the theoretical waveforms, the coefficients of each frequency component are obtained by numerical calculations. By using the semi-analytical expression, characteristics of the class-E rectifier can be comprehended in a theoretical manner. By varying the output-filter inductance, it is possible to improve the rectifier characteristics, such as larger power output capability and zero input reactance, compared with the traditional class-E rectifiers. This paper also presents two examples of designs and implementations of resonant converters with the class-E rectifier. The validity of the semi-analytical expression and design strategies were confirmed from the quantitative agreements with experimental and PSpice simulation results.