A novel control evaluation technique for resonant converters

The novel analysis technique for resonant converter (RC) control is developed that is based on converter performance evaluation on the state plane and in discrete-time domain. This technique allows one to predict the steady state regime existence and its important features through graphical state-plane consideration. To examine control dynamics, a new effective approach to RC nonlinear difference equations analysis is advanced that reveals converter small and large signal stability as well as transient character and speed. The proposed method was employed for comparative analysis of accustomed control methods in application to series RC and led to deeper insight of their operation