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Buck Converter with Loop Gain Analysis

This demonstration shows how to perform a Steady-State Analysis and obtain the loop gain of a voltage-regulated buck converter with a resistive load using Loop Gain Analysis. The Loop Gain Analysis applies a set of sinusoidal perturbations to the system under study. At each of these user-specified frequencies it then finds the periodic steady-state operating point of the perturbed system, and extracts the system response using Fourier analysis. For detailed information see this tutorial.

To run a Loop Gain Analysis double-click on the Loop Gain 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 the loop gain calculated using Multitone Analysis is given in the demo model Buck Converter with Loop Gain Multitone Analysis.

Demo models providing open-loop transfer calculations are also included:

A demonstration of an open-loop AC Sweep Analysis is given in the demo model Buck Converter with AC Sweep.

A demonstration of an open-loop Impulse Response Analysis is given in the demo model Buck Converter with Impulse Response.

A demonstration of an open-loop Multitone Analysis is given in the demo model Buck Converter with Multitone Analysis.