Simulation of PWM based Sliding Mode Controller for a DC-DC Buck Converter on FIL

Abstract

This paper addresses the real time implementation on FPGA of a robust non-linear control scheme, PWM based Sliding Mode Control for a DC-DC Buck Converter operating in Continuous Conduction Mode (CCM). The DC-DC converter is modeled while keeping in consideration the effects of parasitic elements and losses. Then the Sliding Mode Control (SMC) law is discussed and designed for the modeled plant. The designed control law is implemented on FPGA using Xilinx System Generator (XSG) Tool. Using Xilinx System Generator (XSG) Tool, FPGA in the loop (FIL) simulations are preformed to validate the robustness in terms of line and load variations. The Simulink environment is used for Xilinx System Generator hardware co-simulation.