Large-Signal Average Modeling and Simulation of DC-DC Converters with SIMULINK

In this paper, modeling and simulation of DC-DC converters under SIMULINK environment is presented. The modeling is performed with a buck converter, employing three different control schemes: voltage-mode control, current-mode control, and average current-mode control. The resulted models are a nonlinear average model that can be used to simulate the converter performance under large-signal condition. Experiment on the prototype circuits subjected to a load current disturbance yields the results which are in reasonable agreement with their simulated counterparts, confirming the validity of the developed models.