Chapter 4 Computer Simulation

Chapter 4 Computer Simulation

4-1

System to be Simulated

• Challenges in modeling power electronic systems 4-2

Large-Signal System Simulation

• Simplest component models

4-3

Small-Signal Linearized Model for Controller Design

• System linearized around the steady-state point

4-4

Closed-Loop Operation: Large Disturbances

• Simplest component models • Nonlinearities, Limits, etc. are included 4-5

Modeling of Switching Operation

• Detailed device models • Just a few switching cycles are studied 4-6

Modeling of a Simple Converter

• Input voltage takes on two discrete values

4-7

Trapezoidal Method of Integration

• The area shown above represents the integral

4-8

A Simple Example

• The input voltage takes on two discrete values 4-9

Modeling using PSpice

• Schematic approach is far superior

4-10

PSpice-based Simulation

• Simulation results

4-11

Simulation using MATLAB

4-12

MATLAB-based Simulation

• Simulation results 4-13