This textbook follows the
treatment of electric machines and drives in my earlier textbook
Electric Drives – An
I have attempted to use the same notation to provide
consistency. If I am
asked to list three unique features of this book, the following are
foremost in my opinion:
The third item above needs
Most research literature and textbooks in this field treat dq-axis
transformation of a-b-c phase quantities on a purely mathematical
basis, without relating this transformation to a set of windings
that could be visualized.
The approach adopted in this book is different but leads to
the same results - we visual a set of representative dq windings
along an orthogonal set of axes and then relate their currents and
voltages to the a-b-c phase quantities.
This discussion follows seamlessly from the treatment of
space vectors and the equivalent winding representation in steady
state in the previous course.
For discussion of all topics in
this course, computer simulations are a necessity. For this purpose, I have chosen Simulink®
for the following reasons:
a student-version that is more than sufficient for our purposes is
available at a very reasonable price and it takes extremely short
time to become proficient in its use.
Moreover, this software simplifies the development of a
real-time controller of drives in the hardware laboratory for
student experimentation – such a laboratory, using 42-V (a future
standard for automotive voltages) machines, is at present under
development using a digital signal processor based rapid-prototyping
All chapters in this book can
be covered in a single-semester course.
and the Simulink®
files used in examples are included on a cd-rom attached to this
book. The reader is
urged to first look at the read-me file on this cd-rom before
reading this textbook.