Page 22 - Electric Machinery Fundamentals

xxii PREFACE

each other, so that an instructor can cover the material in the order which best suits
his or her needs. For example, a one-semester course with a primary concentration
in ac machinery might consist of parts of Chapters 1,2,3,4,5, and 6, with any
remaining time devoted to dc machinery. A one-semester course with a primary
concentration in de machinery might consist of parts of Chapters 1, 2, 7, and 8,
with any remaining time devoted to ac machinery. Chapter 9 is devoted to single-
phase and special-purpose motors, such as universal motors, stepper motors,
brushless de motors, and shaded-pole motors.
The homework problems and the ends of chapters have been revised and
corrected, and more than 70% of the problems are either new or modified since
the last edition.
In recent years, there have been major changes in the methods used to
teach machinery to electrical engineering and electrical technology students.
Excellent analytical tools such as MATLAB® have become widely available in
university engineering curricula. These tools make very complex calculations
simple to perform, and they allow students to explore the behavior of problems
interactively. This edition of Electric Machinery Fundamentals makes selected
use of MATLAB to enhance a student's learning experience where appropriate.
For example, students use MATLAB in Chapter 6 to calculate the torque- speed
characteristics of induction motors, and to explore the properties of double-cage
induction motors.
This text does not teach MATLAB; it assumes that the student is familiar
with it through previous work. Also, the book does not depend on a student hav-
ing MATLAB. MATLAB provides an enhancement to the learning experience if
it is available, but if it is not, the examples involving MATLAB can simply be
skipped, and the remainder of the text still makes sense.
This book would never have been possible without the help of dozens of
people over the past 25 years. It is gratifying for me to see the book still popular
after all that time, and much of that is due to the excellent feedback provided by
reviewers. For this edition, I would especially like to thank:

Ashoka K.S. Bhat Jesus Fraile-Ardanuy
University o/Victoria Ulliversidad Politecnica de Madrid
William B utuk Riadh Habash
Lakehead University University of Ottawa
Shaahin Filizadeh Floyd Henderson
University of Manitoba Michigan Technological University

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MATLAB is a registered trademark of The MathWorks, Inc.
The MathWorks, Inc., 3 Apple Hill Drive, Natick, MA 01760-2098 USA
E~mail: info@mathworks.com; www.mathworks.com