Advanced Electric Drives Using MATLAB Simulink
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Advanced Electric Drives Using MATLAB Simulink

Advanced Electric Drives Analysis Control and Modeling Using MATLAB Simulink by Ned Mohan | PDF Free Download.

Preface to Electric Drives PDF Book

When I wrote the first version of this textbook in 2001, my opening paragraph was as follows: Why write a textbook for a course that has pretty much disappeared from the curriculum at many universities?

The only possible answer is in hopes of reviving it (as we have been able to do at the University of Minnesota) because of enormous future opportunities that await us including biomedical applications such as heart pumps,

harnessing of renewable energy resources such as wind, factory automation using robotics, and clean transportation in the form of hybrid-electric vehicles. Here we are, more than a decade later, and unfortunately the situation is no different.

It is hoped that the conditions would have changed when the time comes for the next revision of this book in a few years from now.

This textbook follows the treatment of electric machines and drives in my earlier textbook, Electric Machines and Drives: A First Course, published by Wiley (

My attempt in this book is to present the analysis, control, and modeling of electric machines as simply and concisely as possible, such that it can easily be covered in one semester graduate-level course.

To do so, I have chosen a two-step approach: first, provide a “physical” picture without resorting to mathematical transformations for easy visualization, and then confirm this physics-based analysis mathematically.

The “physical” picture mentioned above needs elaboration. 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, albeit hypothetical, that can be visualized.

That is, we visualize a set of hypothetical 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 representations in steady state in the previous course and the textbook mentioned earlier.

For discussion of all topics in this course, computer simulations are a necessity. For this purpose, I have chosen MATLAB/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 same software simplifies the development of a real-time controller of drives in the hardware laboratory for student experimentation—such a laboratory using 42-V machines is developed using digital control and promoted by the University of Minnesota.

The MATLAB and Simulink files used in examples are included on the accompanying website to this textbook:

As a final note, this textbook is not intended to cover power electronics and control theory.

Rather, the purpose of this book is to analyze electric machines in a way that can be interfaced to well-known power electronic converters and controlled using any control scheme,

the simplest being proportional-integral control, which is used in this textbook.

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