Simple control architecture is realized using hybrid feed forward control for a Power Factor Correction (PFC) rectifier based on a four-switch buck-boost converter. The converter operates in repeated Conduction Mode, with gentle changes between the buck and the boost operations across a line-cycle. To implement the Power Factor Correction (PFC) functionality, the controller computes the buck and the boost duty cycles based on the sensed inductor current and output voltage. The power converter

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... simulated in Matlab Simulink.. The various parameters such as efficiency and voltage regulations are recorded. This is achieved by designing a controller that controls the load as well as the Single-switch resonant dc/dc converter. To this end, a FUZZY controller is designed, which is integrated by a control associated with the dc load and a control related with the Single-switch resonant dc/dc converter. The controller works based on the reference voltage and the output voltage of the converter circuit. The control allows the constant dc load angular velocity to track a desired trajectory and also provides the desired voltage profile that must be followed by the output voltage of the single-switch resonant dc/dc converter. The FUZZY controller is tested through experiments using MATLAB-Simulink. The obtained results show that the desired voltage trajectory is well tracked under abrupt variations in the system guideline and that the controller is robust in such operation conditions, confirming the validity of the proposed controller.