Fuzzy Incremental Controller for the 3rd Order Buck Converter

In this paper a fuzzy incremental controller is proposed for higher order converter topology, 3^rd order buck converter. Main advantage of the proposed converter is the input source current is smooth and exhibits lower ripple current/ EMI. As the converter is of higher order nature controller parameters tuning is a difficult task in conventional design and hence an adaptive controller, fuzzy PI type controller, is proposed in this paper. Fuzzy PI tuning factors selection is discussed and then total closed- loop regulated converter system is simulated in SIMULINK using fuzzy logic tool box. Experimental results, obtained using dSPACE, are given for validating the proposed concept and simulations.