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

A fuzzy logic controller for DC-DC Buck and Boost converters is designed and presented in this paper. The mathematical model of buck and boost converter and fuzzy logic controller are first derived then converted to a hardware model using VHSIC Hardware Description Language. The hardware model was subsequently synthesized and implemented in a Field programmable Gate Array (FPGA) chip. 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. An FPGA-based fuzzy logic controller was implemented and interfaced to a DC-DC converter module. The system was tested using white LEDs as loads. Simulation and experimental results show that the DC-DC converter is able to maintain the output based on the value set inside the controller module.