ac motor control and electrical vehicle applications second edition pdf
The importance of motor control technology has resurfaced recently, since electrification of various power sources reduces green house gas. Autonomous vehicle technology opens a new world of unmanned delivery with the expansion of drone applications. Sooner or later, electric planes and flying cars are popularly used for passenger transport. The motor application is more accelerated as the battery costs are reduced.
Control engineers need to understand many motor design issues to meet the
challenging design specifications. From this point of view, various aspects including
motor control, motor design, practical manufacturing, testing, and programming
are considered in this book. This book was written as a textbook for a graduate
level course on AC motor control and electric drive. Not only the motor control,
but also some motor design basics are covered to give a comprehensive view in
the multidisciplinary age. Theoretical integrity in the modeling and control of AC
motors is pursued throughout the book.
In the second edition, many EV projects and teaching experiences at POSTECH
and industrial sites are reflected. The contents become richer by adding more exercises and problems that utilize Excel spreadsheet and MATLAB Simulink. There is a little barrier for the beginners to understand the principles of the AC rotating machine, because many physical phenomena are interpreted in the moving frame. The essential machinery is the ability to understand voltage to current dynamics in the rotating frame. Firstly, this book is focused on illustrating how
the rotating field is synthesized with the three phase winding. Also, the benefits of
coordinate transformation are stressed in the dynamic modeling of AC motors. For
example, many mathematical tools are utilized to show how the voltage and current
limits affect the torque maximization. Loss minimizing and sensorless controls are
In the second part of this book, many issues regarding EV motor design and
fabrication are expressed. In Chapter 11 and 12, a motor design method is suggested
based on the requirements of power, torque, power density, etc. under voltage
and current limits. In addition, experimental procedure and inverter programming
technique are introduced that provide an optimal current control strategy under
varying (battery) voltage conditions. In the last part, the basics of vehicle dynamics
and EV power trains are shown including calculation methods of driving range and
efficiency of the vehicle.
This book is intended to bring combined knowledge and problems to the students
who wish to learn the electric power train. So a fusing approach is attempted while
covering control, signal processing, electro-magnetics, power electronics, material
properties, vehicle dynamics, etc. Many control issues that can lead to on-going
research are discussed.