Fuzzy control of zero current switching resonant buck converter

In this paper, an auxiliary circuit to achieve the soft switching condition for a buck converter is proposed. The switching devices used in power converters need to withstand high voltage stress across them which leads to increased switching losses. In order to maximize the efficiency, soft switching techniques must be adopted. The performance of the converter is enhanced by introducing the PID controller and fuzzy logic controller. The model is simulated in MATLAB/SIMULINK and the performance of the converter is presented with PID and fuzzy controllers.