Design of single-input fuzzy logic control of fly back multi-output quasi resonant converter

Power supply voltages in digital systems have been reduced considerably in recent years and often digital components requiring different voltages are present in the same board. This has increased the demand for multiple output power distribution systems with tight load regulation. In this paper, a detailed analysis and design of a multi-output fly back zero voltage switching (ZVS) quasi resonant converter (QRC) has been carried out. In order to improve the performances of the converter due to nonlinearity, intelligent controller like conventional fuzzy logic controller and single input fuzzy logic controller are proposed and simulated. The output results for load regulations are presented and the performances of both the controllers are compared. The result reveals that single input fuzzy logic controller gives satisfactory performances.