Controlling DC-DC Buck Converter Using Fuzzy-ND with DC motor load

Circuit of DC-DC converter is a device converting from remains DC input voltage to variable output voltage. The components used for switching converter can be MOSFET, IGBT, Thiristor, GTO and others. This paper discusses DC-DC buck converter to reduce the voltage by using MOSFET switching that is used to control the output voltage of buck converter remain constant with DC motor load. To control the output voltage the buck converter remains constant and stable, it is required proper control to regulate the duty cyclenya. The methods are combination of conventional control methods namely Proportional Integral Derivatives (PID) and intelligent control of Fuzzy logic. It was simulated by using MATLAB software. The simulation results show the combination of PID control and Fuzzy Logic can improve the performance. Small error is almost zero and the output voltage of the buck converter remains constant even though the motor load is changed.