Design, development and implementation of a fuzzy logic controller for DC-DC buck and boost converter in an FPGA

• Main Author: Caldo, Rionel Belen
• Format: text
• Language: English
• Published: Animo Repository 2013
• Subjects: DC-to-DC converters; Electronic controllers; Controls and Control Theory; Electrical and Electronics
• Online Access: https://animorepository.dlsu.edu.ph/etd_masteral/4431; https://animorepository.dlsu.edu.ph/context/etd_masteral/article/11269/viewcontent/CDTG005434_F2.pdf
• Institution: De La Salle University

A fuzzy logic controller for DC-DC Buck and Boost converter is designed and presented in this paper. In controlling the output voltage of the buck and boost converter, the controller is designed in changing the duty cycle of the converter. The mathematical model of buck and boost converter and fuzzy logic controller are derived to design simulation model. In order to confirm that the mathematical model gives stable output frequency, simulation on MATLAB is made. To verify the effectiveness of the simulation model, an experimental set up is developed. The FPGA-based hardware model of buck and boost converter in one fuzzy logic controller to control duty cycle of Pulse Width Modulation (PWM) signal generator and drive white LEDs was developed. Fuzzy logic controller to generate duty cycle of PWM signal is VHDL coded. The simulation is verified on three programming platforms: Matlab Toolbox, DevCpp and Excel VB Macro. The simulation and experimental results show that the output voltage of the buck and boost converter can be controlled according to the value of duty cycle.