Dynamics analysis for the series-parallel resonant converter operating with SSPSM

This paper proposes a dynamic study of the dc/dc series-parallel resonant converter (SPRC) operating with self-sustained phase shift modulation technique (SSPSM). The study includes the synthesis of a suitable averaged large-signal dynamic model and the design of a nonlinear feedback controller based in the input-output linearization approach. The proposed controller provides some outstanding features: ZVS operation for the whole load range, narrowed frequency variation range, fast transient response and robustness in relation to external parameter variations. Experimental and simulation results are presented to verify the proposed controller performance.