DEVELOPMENT OF DSP BASED ROBUST CONTROL METHOD FOR GENERAL RESONANT CONVERTER TOPOLOGIES USING TRANSFER FUNCTION MODEL

Abstract

In this paper the General Series Parallel Resonant Converters (GSPRC) is analyzed using state space techniques and the general mathematical model of the converters has been developed and simulated using MATLAB. The investigations on the series parallel resonant converter topologies such as CLL-T SPRC, LLC-T SPRC and LCL-T SPRC with closed loop operation has been estimated and presented. The comparative analysis of the converters and controllers is presented in this paper. A simple form of transfer function for the GSPRC is developed, which is used to analyses the stability of various resonant topologies. The simulation study indicates the superiority of fuzzy controller over the conventional control methods. A DSP based prototype of 300 W, 100 KHz converter is designed and experimentally demonstrated. The effectiveness of the proposed controller is verified for load and supply disturbance in experimental set up using TMS320F2407 processor. Comparison between experimental and simulations show a very good agreement and the reliability of fuzzy controller.