Performance Evaluation of Positive Output Switched Capacitor Elementary Luo Converter with PI and Fuzzy Controllers
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This paper presents simulation of PI and fuzzy logic controllers for a positive output switched capacitor elementary Luo converter which is a newly developed DC-DC converter. This combines both switched capacitor and voltage lift techniques. .Due to the time-varying and switching nature of the power electronic converters, their dynamic behavior becomes highly non-linear. Conventional controllers are incapable of providing good dynamic performance and hence fuzzy logic controller can be utilized as a feed forward controller for controlling power electronic converters. The control algorithm is developed in this work to ensure tracking of the reference voltage and rejection of system disturbances by successive measurements of the converter output voltage at certain time instants within a conduction period. The main objective is simulation of PI and fuzzy logic controls using MATLAB (version 7.0.1) software to evaluate the controller’s performances. The simulation results show that fuzzy controller performs better for the chosen converter.
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