Excerpt from Design of Electrical Machinery, Vol. 3: A Manual for the Use, Primarily, of Students in Electrical Engineering Courses The purpose of this volume is to treat alternating-current generators, synchronous motors, and rotary converters. It contains what the author believes will be of most service to the student who is just entering upon his experience as a designer. A more comprehensive study of the principles and phenomena underlying the calculations should be made by means of lectures, recitations, through the medium of references, etc. Good electrical apparatus cannot be designed by any set of rules, and it must be recognized that it is not, in general, feasible to develop a finished commercial designer in a college course. However, there are certain fundamental scientific principles which can be laid down definitely and taught with precision. The student should bear in mind that while there is much in this volume that is of practical value, the main object is to present as clearly and briefly as possible the fundamental principles on which the designer necessarily rests. He should also bear in mind that he cannot expect to get any more than a training that will be of value and assistance to him, if at any time in his later experience he should decide to become a designer. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.