Pulse splitting cum width control for transient handling of LLC Resonant Converter

Abstract

The Proposed Converter discusses the control algorithm to suppress the inrush starting current of the resonant converter with fast dynamics. The Proposed converter is able to handle the inrush current by switching the converter at the start with twice the resonant frequency and reducing the switching frequency to near resonant frequency while at the steady state condition the variable switching frequency is achieved using look up table method. Initial transients are eliminated using proposed modified hysteresis controller. The 3.3KW, 380V/96V LLC resonant converter outcomes and performance are confirmed using MATLAB/SIMULINK.