Somewhat arbitrary lower limit was set in order to restrict the coverage to the more c o m m o n machines and to eliminate the very diverse range of small motors. Although motor size is strictly dependent upon torque rather than power, the scope of the Handbook has been broadly defined as relating to rotating machines of above about 1 0 k W output (with normal industrial supply frequency). Rather it is intended as a user's handbook, written by engineers for engineers, which may provide a useful source of reference. This book is not primarily directed towards either of these activities. The vast majority of textbooks on electrical machines concern methods of performance analysis, while a rather smaller number concern the design process. It is to be hoped that the availability of this Handbook will help many readers avoid such misfortunes. Accordingly, a significant proportion of this book relates to the causes, occurrence and avoidance of such problems. A s o n e who has for about 30 years been mainly concerned with electromagnetic aspects of electrical machines, I confess I have long believed that the majority of their operational problems, and practically all the manifestations of failure or breakdown, are non-electrical, whether they be of the nature of fracture, abrasion, burning or explosion. Their initial outline plans gave me a good starting point. It was only after force of circumstances prevented them pursuing the project that I became involved. B o n e, all then with Laurence, Scott and Electromotors Ltd. I must also acknowledge that the original proposal for this form of handbook was made by Κ. In consequence, a little duplication has been accepted. I have taken the view that the reader seeking information in a particular context should not be disappointed. under both commissioning and maintenance. While the chapters are, in the main, independent it may be observed that some points are covered in more than one chapter, e.g. A world-wide rather than parochial view has been sought by including international authors, considerations and illustrations. The Chapter contents are essentially theirs and I am greatly indebted to them for the manner in which they responded to the tasks I set them. I therefore readily acknowledge the expertise contributed by the individual chapter authors, which represents their combined experience accumulated over many decades. Such a task would have been over-ambitious for most single authors, and certainly for the present editor. A s with J & Ρ books, the aim has been to compile an authoritative handbook which will be of real practical use to engineers working in a wide range of capacities including plant design, equipment specification, commissioning, operation and maintenance. The J & Ρ Books have been widely used by generations of engineers all over the world and, in setting out to create this Electric Motor Handbook, I was conscious that the target was high. The opportunity to edit a major new handbook, to stand alongside the long established J & Ρ Transformer Book and J & Ρ Switchgear Book is at once an honour and a challenge.
Photoset by Butterworths Litho Preparation Department Printed and bound in Great Britain by Butler and Tanner, Frome, Somerset Electric m o t o r s - H a n d b o o k s, manuals, etc. Library of Congress Cataloging-in-Publication Data Electric motor handbook/edited by B. (Publishers) Ltd., 1988īritish Library Cataloguing in Publication Data Electric Motor H a n d b o o k 1. This book is sold subject to the Standard Conditions of Sale of N e t B o o k s and may not be re-sold in the U K below the net price given by the Publishers in their current price list. Such written permission must also be obtained before any part of this publication is stored in a retrieval system of any nature.
N o part of this publication may be reproduced or transmitted in any form or by any means, including photocopying and recording, without the written permission of the copyright holder, application for which should be addressed to the Publishers.
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