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Buck Converter with Impulse Resp. Analysis

This demonstration shows how to perform a Steady-State Analysis and obtain different open-loop transfer functions using Impulse Response Analysis for an unregulated buck converter with a resistive load. The Impulse Response Analysis provides an alternative and faster method than AC Analysis to determine the open-loop transfer function of a system. Instead of perturbing a system with sinusoidal stimuli of different frequencies, one at a time, a single impulse is applied when the system is in steady state. The system transfer function can then be calculated very efficiently over a wide frequency range by computing the Laplace transform of the transient impulse response. For detailed information see this tutorial.

To run an Impulse Response Analysis double-click on the Impulse Response Analysis block to open the dialog and click on the Start analysis button. The progress of the analysis is displayed in the MATLAB Command Window. When the analysis has finished a new Bode plot will be displayed showing the corresponding transfer function.

A demonstration of a Loop Gain Analysis is given in the demo model Buck Converter with Loop Gain Analysis.