4-1 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Chapter 4 Computer Simulation

4-2 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems System to be Simulated Challenges in modeling power electronic systems

4-3 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Large-Signal System Simulation Simplest component models

4-4 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Small-Signal Linearized Model for Controller Design System linearized around the steady-state point

4-5 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Closed-Loop Operation: Large Disturbances Simplest component models Nonlinearities, Limits, etc. are included

4-6 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Modeling of Switching Operation Detailed device models Just a few switching cycles are studied

4-7 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Modeling of a Simple Converter Input voltage takes on two discrete values

4-8 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Trapezoidal Method of Integration The area shown above represents the integral

4-9 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems A Simple Example The input voltage takes on two discrete values

4-10 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Modeling using PSpice Schematic approach is far superior

4-11 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems PSpice-based Simulation Simulation results

4-12 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems Simulation using MATLAB

4-13 Copyright © 2003 by John Wiley & Sons, Inc. Chapter 4 Computer Simulation of Power Electronic Converters & Systems MATLAB-based Simulation Simulation results