A MATLAB GUI Program for LLC Resonant Converter

In this paper, a graphical user interference (GUI) program based on MATLAB was built for LLC resonant converter. The time domain analysis method is adopted to derive the mathematical model of LLC resonant converter in PO operation mode. The designed MATLAB GUI program has the following features and advantages: 1) key circuit voltages and currents operation waveforms are presented, which can help visualize the steady state operation of the converter; 2) the execution time is only around one second, which is much more faster than commercial simulation software; 3) important currents and voltages values are summarized and listed, which is convenient for users; 4) power loss model is used to obtain the efficiency and power loss distribution information, which is beneficial for LLC converter design; 5) high accuracy and small computation capacity make it suitable for industry applications. Brief introductions for the time domain analysis are presented in this paper. Comparisons between the proposed GUI program and commercial simulation tools are made.