IMPROVE DC-DC RESONANT CONVERTER EFFICIENCY BY FUZZY LOGIC CONTROLLER

Abstract

Resonant converters are becoming more and more popular these days due to their Soft-switching techniques, such as Zero-Voltage Switching and Zero-Current Switching can be implemented which provides better EMI performance along with higher efficiency Resonant Converters are capable of achieving higher power density meaning the overall converter size can be reduced as the converter can operate at higher switching frequencies due to soft-switching described above ability to achieve high efficiency through softly commutating the switching devices. in this paper the resonant DC-DC converter is proposed and verified by using MATLAB/SIMULINK ,The converter is controlled first by variable frequency and then by using fuzzy controller in order to improve the converter efficiency