Abstract
A novel accurate Simulation-Design tool have been proposed for the study and optimal design for DC-DC resonant converters based on generalized time-domain analysis of different 3-4 element resonant tanks. The proposed Simulation-Design tool has been made using Graphic User Interface (GUI) based MATLAB APP designer tool after incorporating the derived time-domain mathematics in MATLAB C-Coding. Analytical steady state waveforms at various operating frequency or loading conditions have been generated for both CLL and LLC resonant tanks. Accurate performance curves for active power, voltage gain, peak stress, tank RMS current, tank capacitor voltage, zero voltage switching (ZVS) angle etc. as a function of the load, frequency and other circuit parameters have been provided using proposed design tool. State Plane Based elliptical solutions have also been provided for the resonant tanks. State plane modelling directly provides the information about peak stress and various switching instants. The accurate trajectories of state plane diagrams is also useful in design of optimal trajectory control. This novel Simulation-Design tool is expected to provide direct informative performance curves and analytical waveforms that can be used for fast study and prototyping of the resonant DC-DC converters. Comparative performance curves are given, corresponding state plane maps are drawn, and analytical steady-state waveforms have been generated. Finally, the resonant tank characteristics have been demonstrated on an experimental setup of 320W power, 400V output voltage.
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