PERFORMANCE INVESTIGATION AND CONTROL OF CLOSED LOOP BUCK CONVERTER

Abstract

In this thesis the simulation of closed loop buck converter is carried out with considering the various parameters of the converter’s operation. The Output of Buck convertor is regulated in closed loop by various control strategies and the variation of output voltage is done by controlling the switch using pulse generated by feedback. A hardware demo model of the buck converter is done for lower rating. In this, the switching action of MOSFET is controlled by the microcontroller, which controls the pulse given to gate terminal of MOSFET switch and consequently the convertor output voltage is observed. The circuit simulation is done for both parasitic and non-parasitic nature of the buck converter. The closed loop Buck converter is analyzed by keeping the photovoltaic emulator as its main application.