Introduction To Power Electronics 

Introduction to Power Electronics 
Valery Vodovozov 

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Valery Vodovozov

Introduction to Power Electronics

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2

Introduction to Power Electronics
© 2010 Valery Vodovozov & Ventus Publishing ApS
ISBN 978-87-7681-625-4

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Contents

Introduction to Power Electronics

ContentsPreface

5

Designations

6

Introduction

7

Power Electronic Converters
AC/DC Converters – Rectifiers
DC/AC Converters – Inverters
AC/AC Converters – Changers
DC/DC Converters – Choppers

2.
2.1.
2.2.
2.3.
2.4.

Power Electronic Controls
Phase Modulation
Block Modulation
Pulse-Width Modulation
Space Vector Modulation

76
77
89
101
111

Index

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1.
1.1
1.2.
1.3.
1.4.

14
14
28
46
59

117

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Preface

Introduction to Power Electronics

Preface
Power Electronics is the technology associated with efficient conversion, control andconditioning of
electric power from its available input into the desired electrical output form. The field of the book is
concerned of electrical power processing using electronic devices the key component of which is a
switching power converter.
Power electronics has found an important place in modern technology being a core of power and
energy control. Almost all the new electrical andelectromechanical equipment contain power circuits.
The power levels encountered in this field range from less than one watt in supplies for the batteryoperated portable equipment to tens, hundreds, or thousands of watts in power units of office
equipment, kilowatts to megawatts in variable-speed motor drives, approaching megawatts in the
rectifiers and inverters that interface the local transmission lineswith the high power systems.
The goal of this work is to introduce students and working engineers involved in power and energy
conversion to the basics of this discipline. The emphasis is on the day-to-day electronic products. The
course covers the features and functions of rectifiers, inverters, ac and dc converters. It provides a
wealth of technical information and contributes to learning thedesign of circuits and equipment based
on electronic components.
The book is recommended as the introductory manual to power electronics. It can be used
as a textbook for undergraduate students in electrical or systems engineering, or as a reference book
for graduate students and engineers who are interested and involved in operation, project management,
design, and analysis of powerelectronic equipment. The background of the course is “Introduction to
Electronic Engineering”.
It is obvious that a wide coverage, such as presented in this book, may lead to any kind of
imperfections. Thus, your commentary and criticisms are appreciated: valery.vodovozov@ttu.ee.
Author

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Designations

Introduction to Power Electronics

DesignationsSymbols
C
capacitor
L
inductor, choke
M
motor
R
resistor
VD
diode
VS
thyristor
VT
transistor
C
capacitance
cos φ power factor
f
frequency
I
current
k
factor, coefficient
L
inductance
L1,2,3 three-phase frame
P
power

q
R
T
t
U
α
β
γ
δ
η
θ
π
φ
ω

duty cycle
resistance
period, time constant
time
voltage
firing angle
angle in advance
overlap angle...