Power Electronics DC-DC Conversion: MATLAB Simulation of Buck-Boost Chopper Circuit

This document explores power electronics DC-DC conversion technology with a focus on the Buck-Boost chopper topology. The implementation employs MATLAB/Simulink for circuit modeling and analysis, incorporating key functions like PWM signal generation using sawtooth carriers and comparator blocks. The simulation includes critical parameters such as switching frequency (typically 10-100 kHz), duty cycle control (0-100%), and component values for inductors, capacitors, and power semiconductors. Through MATLAB's Power Systems Toolbox, we simulate transient responses, output voltage regulation, and efficiency calculations using ode solvers for numerical integration of differential equations. The simulation enables performance prediction under varying load conditions, facilitating component selection and control strategy optimization. This approach provides insights into practical implementation considerations including electromagnetic interference mitigation and thermal management requirements.