Brushless Permanent Magnet Motor Design - 2nd Edition - Duane Hanselman

You've just picked up another book on motors. You've seen many others, but they all assume that you know more about motors than you do. Phrases such as armature reaction, slot leakage, fractional pitch, and skew factor are used with little or no introduction. You keep looking for a book that is written from a more basic, yet rigorous, perspective and you're hoping this is it.

If the above describes at least part of your reason for picking up this book, then this book is for you. This book starts with basic concepts, provides intuitive reasoning for them, and gradually builds a set of understandable concepts for the design of brushless permanent magnet motors. It is meant to be the book to read before all other motor books. Every possible design variation is not considered. Only basic design concepts are covered in depth. However, the concepts illustrated are described in such a way that common design variations follow naturally.

If the first paragraph above does not describe your reason for picking up this book, then this book may still be for you. It is for you if you are looking for a fresh approach to this material. It is also for you if you are looking for a modern text that brings together material normally scattered in numerous texts and articles many of which were written decades ago.

Is this book for you if you are never going to design a motor? By all means, yes.

Although the number of people who actually design motors is very small, many more people specify and use motors in an infinite variety of applications. The material presented in this text will provide the designers of systems containing motors a wealth of information about how brushless permanent magnet motors work and what the basic performance tradeoffs are. Used wisely, this information will lead to better engineered motor systems.

Why a book on brushless permanent magnet motor design? This book is motivated by the ever increasing use of brushless permanent magnet motors in applications ranging from hard disk drives to a variety of industrial and military uses. Brushless permanent magnet motors have become attractive because of the significant improvements in permanent magnets over the past decade, similar improvements in power electronics devices, and the ever increasing need to develop smaller, cheaper, and more energy efficient motors. At the present time, brushless permanent magnet motors are not the most prevalent motor type in use. However, as their cost contin-