ECE 469 — Power Electronics Laboratory
LABORATORY INFORMATION AND GUIDE
with
Chapter 18 of ELEMENTS OF POWER ELECTRONICS
Prof. P. T. Krein
Department of Electrical and Computer Engineering
University of Illinois
Urbana, Illinois
Version 2.5 — August 2012
Copyright © 1988-2012 Philip T. Krein. All rights reserved.
Power Electronics Laboratory Manual -- Introductory Material
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Contents
Introductory Material ....................................................................................................................................... iii
Preface and Acknowledgements ...................................................................................................................... iii
Expected Schedule ........................................................................................................................................... iii
Introduction ...................................................................................................................................................... iv
Safety ................................................................................................................................................................. v
Equipment and Lab Orientation ..................................................................................................................... vii
Introduction ................................................................................................................................................. vii
Map of the Facility and Electrical Panels .................................................................................................... vii
The Lab Workbenches .................................................................................................................................. x
Course Organization and Requirements ........................................................................................................ xiii
The Lab Notebook .......................................................................................................................................... xiv
The Lab Report .............................................................................................................................................. xvi
The Title Page ............................................................................................................................................ xvi
Abstract ...................................................................................................................................................... xvi
Conclusion ............................................................................................................................................... xviii
References ................................................................................................................................................ xviii
Appendix .................................................................................................................................................. xviii
DEMONSTRATION #1 — Introduction to the Laboratory .......................................................................... 1
EXPERIMENT #1 — Basic Rectifier Circuits .............................................................................................. 11
EXPERIMENT #2 — Ac-Dc Conversion, Part I: Single-Phase Conversion .............................................. 21
EXPERIMENT #3 — Ac-Dc Conversion, Part II: Polyphase Conversion ................................................. 29
EXPERIMENT #4 — Dc-Dc Conversion, Part I: One-Quadrant Converters ........................................... 35
EXPERIMENT #5 — Dc-Dc Conversion, Part II: Converters for Motor Drives ...................................... 43
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EXPERIMENT #6 — Dc-Ac Conversion, Part I: Voltage-Sourced Inverters ........................................... 53
EXPERIMENT #7 — Dc-Ac Conversion, Part II: Pulse Width Modulation Inverters ............................ 61
EXPERIMENT #8 — Passive Components, Part I: Models for Real Capacitors and Inductors ............. 67
EXPERIMENT #9 — Passive Components, Part II: Magnetics ................................................................. 77
Design Project — Part I ................................................................................................................................... 83
Design Project — Part II .................................................................................................................................. 91
Summary Specification Sheets for Parts ....................................................................................................... 100
Design Project — Part III .............................................................................................................................. 105
APPENDICIES ............................................................................................................................................... 112
Standard Resistor Values .............................................................................................................................. 112
Common Waveforms ..................................................................................................................................... 114
Index ................................................................................................................................................................ 115
CHAPTER 18 — The Special Needs of Converter Experiments ……………………………………………18-2
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Introductory Material
Preface and Acknowledgements
Power electronics studies the application of semiconductor devices to the conversion and control of electrical
energy. The field is driving an era of rapid change in all aspects of electrical energy. The Power Electronics
Laboratory course — one of very few offered at the undergraduate level in the United States — seeks to
enhance general material with practice and hands-on experience. The laboratory course provides instruction in
general lab practices, measurement methods, and with the design and operation of several common circuits
relevant to the field of power electronics. It also provides experience with common components such as
motors, batteries, magnetic devices, and power semiconductors. The course has a significant design
component. The final weeks of the term are devoted to a power converter design project.
The equipment and instrumentation for ECE 469 were updated substantially in 2006, with additional updates
in 2008. A bench reconfiguration project has been carried out in 2011. The building electrical system was
completely rebuilt in 2010. Many people have helped in a wide variety of ways in the past, and their efforts are
appreciated. The 2006 project owes a great deal to Z. Sorchini and J. Kimball, and special thanks go to them.
Updates by R. Balog have been of great value. The generous support of The Grainger Foundation has been
instrumental in developing and improving the laboratory. The efforts of the ECE Electronics Shop and the
ECE Machine Shop in preparing the benches and equipment is gratefully acknowledged.
Student feedback is encouraged throughout the semester. Your input will help make the course more
interesting and enjoyable, and will increase its value over time. Comments are always appreciated.
Experiments and other work can and will be modified quickly if the need arises. The course is designed as an
advanced laboratory, primarily for seniors and graduate students. You will find that procedural details are up to
the student teams. The requirements for lab reports and procedures reflect the standards of a productive
industrial research and development lab more than the relatively routine work in beginning courses.
Expected Schedule
The schedule will be provided during the first week of classes.
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Introduction
Power electronics is a broad area. Experts in the field find a need for knowledge in advanced circuit theory,
electric power equipment, electromagnetic design, radiation, semiconductor physics and processing, analog
and digital circuit design, control systems, and a tremendous range of sub-areas. Major applications addressed
by power electronics include:
· Energy conversion for solar, wind, fuel cell, and other alternative resources.
· Advanced high-power low-voltage power supplies for computers and integrated electronics.
· Efficient low-power supplies for networks and portable products.
· Hardware to implement intelligent electricity grids, at all levels.
· Power conversion needs and power controllers for aircraft, spacecraft, and marine use.
· Electronic controllers for motor drives and other ind
