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Simulation and Real-Time Implementation of Fuzzy Logic Controller for Parallel Loaded Resonant Converter

This paper presents a high frequency soft-switched DC-DC converter for applications especially in distributed energy generation systems like solar systems, vertical axis aero-generator and fuel-cell power systems. These converters are nowadays widely used to achieve reduction in size of the passive components of the converter such as inductors, capacitors and transformers. Since soft-switched converters are non-linear time-variant systems, conventional controllers do not provide satisfactory performance for these converters. The fuzzy logic controller provides features such as fast response, good performance and the ability to change the fuzzy parameters to improve the control of such converters. The control algorithm used ensures tracking of the reference voltage and rejection of system disturbances by successive measurements of the converter voltage at time instants within a conduction period. The main objectives of this work are to develop fuzzy logic control of parallel loaded resonant converters using MATLAB software and TMS320F2407 DSP based hardware implementation to evaluate the controller's performances. The simulation and experimental results prove the effectiveness of the proposed scheme.