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