Fuzzy Logic Based Totem pole- PFC Converter

Power quality is always a major threat to grid-connected systems. Different topologies can be used in EV chargers. However, due to several limitations in the active Power Factor Correction (PFC) and proportional-integral (PI) based PFC has led to exploring advanced schemes. This paper presents novelty by introducing fuzzy logic with totem pole power factor correction. An attempt has been made to use this PFC for Electric Vehicle (EV) chargers. Totem pole topology offers high efficiency, low conduction loss, and high speed. The proposed scheme uses two loops with an inner loop having a current error amplifier to control the input line current and the outer loop involving fuzzy logic controller (FLC), to control the output voltage. This makes the input current be shaped in phase with input voltage accordingly with reference parameters. The proposed system is verified using extensive simulations in MATLAB/Simulink and the results are compared with PI-based PFC. Results show that the proposed scheme improves the performance significantly with total harmonic distortion (THD) limited to IEEE standards limit having nearly unity power factor.