Buck Converter Polynomial Voltage Control

This example shows how to control the output voltage of a buck converter using a polynomial RST controller. The RST controller adjusts the duty cycle. The input voltage is considered constant throughout the simulation. A variable resistor provides the load for the system. The total simulation time (t) is 0.25 seconds. At t = 0.15 seconds, the load is changed. At t = 0.2 seconds, the voltage reference is changed from 6V to 4V.

Model

Simulation Results from Simscape Logging

The plot below shows the requested and measured voltage for the test and the input voltage in the circuit.