Robust controller design for DC-DC converters using fuzzy logic

Abstract

DC-DC converters in DC system are equally important as that of transformers in AC system. Applications of DC-DC converters include integration of renewable sources, power supplies, controlled electric drives etc. Digital design of fuzzy logic controller (FLC) based robust controller for DC-DC converter is presented in this research paper. The FLC shows good performance where linear control techniques are unable to produce desired result. The power electronic converters suffer from non-linearity and therefore conventional linear controllers don't provide desired response. The proposed FLC is inspected for practical operating conditions of DC-DC converters such as load changes, input voltage variations etc. A comparative simulation result is produced for practical operating conditions which shows superiority and robustness of controller. The proposed digital design of FLC can be implemented on DSP for generating switching duty cycle for converters.