Control Approach for Full-Bridge Series Resonant Converter

In this article, a full-range output voltage regulation control approach is introduced for full-bridge series resonant converter. Compared with the existing control approaches, the proposed control approach can achieve the full-range output voltage regulation with a limited switching frequency range, zero-voltage switching turn-on for all fully-controlled power switches and zero-current switching turn-off for all power diodes without the auxiliary circuits. Moreover, the operating principle of the full-bridge series resonant converter with the proposed control approach is discussed. The voltage gains and the component stresses of the converter with the different transformer turns ratios are provided with detailed mathematical analysis. Finally, the simulation is employed by the MATLAB/SIMULINK software, which demonstrates the correctness of the theoretical analysis.