Design, Simulation and Comparative Analysis of Switched Mode Converter incorporating PID and Fuzzy Logic Control Topology

Switched mode power electronic converters have variety of applications in industry, research, traction including electric vehicles due to their superior characteristics compared to linear power supplies. The paper aims at comparative performance analysis of conventional PID controller and Fuzzy Logic Controller for a prototype 50 Volt DC, 20 Amp switched mode power electronic converter application. Many electronic devices/equipment's require various DC voltage levels than that supplied by the battery. Switched mode converters needs to regulate its output voltage to lower voltage and must quickly respond to fast load and line variations/transients to keep the output voltage within a limited range without any undesired overshoot or undershoot. The design of high performance linear proportional integral controller for switched mode converter presents series of challenges due to non linear nature of the plant process. Fuzzy logic controller is mostly used in variety of industrial applications including use in domestic appliances and main tool of operation of fuzzy logic controller is membership function. It doesn't require any mathematical model for the plant process. In this paper linear proportional integral controller and non linear fuzzy logic controller have been proposed incorporating with switched mode converter. Both the controller design configurations have been simulated using software simulation tool. The simulation results shows the fuzzy logic controller has improved steady state as well as transient performance compared to conventional proportional integral controller under various simulated scenarios. The circuit simulation results have been presented in the paper including discussions on performance parameters of controller.