Simulink Control Design™ - MathWorks

Design Controller for Power Electronics Model Using

Frequency Response Data

This example shows how to design a PID controller for a power electronics system

modeled in Simulink® using Simscape™ Electrical™ components.

Typically, power electronics systems cannot be linearized because they use high-

frequency switching components, such as pulse-width modulation (PWM) generators.

However, most Simulink® Control Design™ PID tuning tools design PID gains based on a

linearized plant model. To obtain such a model for a power electronics model that cannot

be linearized, you can:

• Estimate the plant frequency response over a range of frequencies as shown in this
  example.


• Estimate the parameters of a linear model of the plant using System Identification
  Toolbox™ software. For an example see, “Design Controller for Power Electronics
  Model Using Simulated I/O Data” on page 7-122.

Boost Converter Model

This example uses a boost converter model as an example of a power electronics system.

A boost converter circuit converts one DC voltage to another, typically higher, DC voltage

by controlled chopping or switching of the source voltage.

mdl = 'scdboostconverter';

open_system(mdl)

7 PID Controller Tuning