Simulation of Buck-Boost Converter Based on Multisim

Abstract

This paper investigates the operation of a Buck-Boost converter, utilizing the Multisim simulation platform to analyze its operational principles in both buck and boost modes. Through theoretical calculations of inductor and capacitor parameters, simulation models for different conduction modes (continuous, boundary, and discontinuous) were constructed to validate the duty cycle regulation mechanism on output voltage. The simulation results indicate that the theoretical design and simulation outcomes are largely consistent, albeit with deviations arising from non-ideal characteristics of components and parasitic parameters. This paper summarizes the sources of these discrepancies and proposes optimization strategies, providing a valuable reference for practical circuit design.