Design of Smart Fuzzy Logic Controller in Quad Buck-Boost DC-DC Converter with Constant Input and Output Current
Lahari S1, Dhanalakshmi R2

1Lahari S*, Electrical and Electronics Engg, Dayananda sagar college of Engg, Bangalore, India.
2Dr. Dhanalakshmi R, Electrical and Electronics Engineering, Dayananda Sagar College of Engineering, Bangalore, India. 

Manuscript received on June 01, 2020. | Revised Manuscript received on June 08, 2020. | Manuscript published on June 30, 2020. | PP: 957-963 | Volume-9 Issue-5, June 2020. | Retrieval Number: E9959069520/2020©BEIESP | DOI: 10.35940/ijeat.E9959.069520
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Abstract: In this paper, the design of a fuzzy logic controller based quad buck-boost converter with constant input and output current is presented. In contrast with the ordinary step-down-up converters the advanced converter with same duty cycle, a large limit of voltage conversion ratio could be acquired. A proposed converter is designed and studied with an intelligent controller i.e. fuzzy logic controller/FLC and differentiated with the ordinary Proportional-Integral /PIC controller. Finally, the analysis of the presented converter by employing MATLAB/Simulink, simulation results of the presented converter is recorded to substantiate the effectualness and rationality of the output voltage control of Quad buck-boost converter in both step-down-up mode and its comparative analysis is presented where the fuzzy logic has a minimum overshoot and settling time compared to regular PI controller. 
Keywords: Constant input and output port current, PI controller (PIC), Fuzzy logic controller (FLC), Overshoot, Settling time.