A front end self-sustained LLC resonant converter

This paper presents a LLC resonant converter working with a self-sustained oscillation controller (SSOC). It provides the optimization of the converter elements ratings, and has an overall higher efficiency than when working with the conventional variable frequency controller (VF). A performance comparison for the converter is performed for both control techniques. It is shown that the self-sustained oscillation controller (SSOC) results in a ten times increase in the value of the magnetizing inductance, which simplifies the transformer. Further, the SSOC shows robustness against the variation of the components due to real time uncertainty. Analytical, and simulation results verifies the performance improvement of the proposed converter.