Excerpt from The Induction Motor

The writer wishes to take this opportunity to acknowledge his indebtedness to those who have preceded him in this field. Every work of an engineering nature is necessarily founded on that of others. An attempt to give original demonstrations of all of the elementary facts in relation to a subject, necessarily leads to a far less simple treatment than the frank use of older methods, when these methods are at least as clear as anything the author has to offer in their stead. In this regard, the present treatise is no exception. Particular mention should be made of the excellent works of Behrend, Boy de la Tour, and mcallister. In particular, the treatise of the last named author has been drawn upon for several simple and lucid demonstrations, notably for the proof of the circle diagram, and for one of the methods of treating the subject of single-phase motors. Credit has been given in the text for contributions of various writers. When this has not been done, the omission is due either to a lack of knowledge on the part of the author, of the work in question, or an uncertainty regarding the author to whom such credit should be given. Lack of time and space has caused the omission of much mate rial of historical interest. The same reason has caused the omission of the discussion of many ingenious devices designed to improve in various ways the performance of induction motors. Many of these relate to methods of improving the starting performance of induction motors, and present numerous points of theoretical and practical importance. In order to keep the size of the book within reasonable limits, it was thought best to limit the discussion almost entirely to devices in successful operation, and to those of recent introduction which seem most likely to be of permanent value. For the same reason, the treatment has been almost entirely confined to motors built in the United States. For much of the experimental work mentioned in the text the author is indebted to the careful work of Mr. H. L. Tanner, Instructor in the Department of Electrical Engineering of the University of Michigan, and to Mr. Stanley D. Livingstone, assistant in the same.

« Synopsis » peut appartenir à une autre édition de cet ouvrage.

Présentation de l'éditeur

Library PREFACE IN presenting a new treatise on the induction motor, the writer is aware that he is entering a field in which there are already many excellent works. In this book, however, an attempt is made to present the subject from a somewhat new standpoint. The endeavor has been to produce a work that will have the greatest possible value for those who wish to inform themselves more fully regarding the theory of the induction motor than they can by studying the elementary text-books, but who at the same time do not care to go too deeply into the theoretical aspects of the question. The writers aim has, therefore, been to present so much of the theory as is necessary to understand the phenomena of the induction motor, so far as these phenomena relate to the design or operation of these machines. The student is assumed to have some knowledge of alternating currents, and to understand in a general way the operation of the alternator, the synchronous motor, the induction motor, etc. To this end, he is supposed to have read some of the several elementary texts dealing with these subjects. Throughout the book, an earnest endeavor has been made to present clearly the physical conception of the actions taking place. It is the writers belief that nine-tenths of the trouble experienced by many people in studying the action of electrical machinery comes from the lack of a clear idea of the elementary physical actions. An attempt is made to apply mathematical reasoning to the problem before this understanding is obtained, and the result is a mental haze, which is perhaps never dissipated. The reader is therefore strongly urged to study carefully the first two chapters, and make sure that they are fully understood, before going farther. Several subjects of the greatest practical importance have been only briefly mentioned, if treated at all, by previous writers. Som
(Typographical errors above are due to OCR software and don't occur in the book.)

« A propos de ce titre » peut appartenir à une autre édition de cet ouvrage.

PBShop.store UK

Fairford, GLOS, Royaume-Uni

Vendeur avec une évaluation de 5 étoiles

Vendeur AbeBooks depuis 11 juin 1999

Frais d'expédition de Royaume-Uni vers Etats-Unis

Article	10 à 20 jours ouvrés	10 à 20 jours ouvrés
Premier article	EUR 4,96	EUR 4,96

Les délais de livraison sont fixés par les vendeurs et varient en fonction du transporteur et du lieu. Les commandes transitant par les douanes peuvent être retardées et les acheteurs sont responsables de tous les droits ou frais associés. Les vendeurs peuvent vous contacter au sujet de frais supplémentaires afin de couvrir toute augmentation des coûts d'expédition de vos articles.

Modes de paiement

Description de la boutique

**Please note our transit times are from the date of dispatch.** We first started out as “The Paperback Exchange,” a chain of physical bookstores where we would part exchange your beloved books for new stories to transport you to faraway places. However, as shopping started to evolve to online shops and marketplaces, we bid our stores goodbye to become “PBShop.” This transition has only allowed us to blossom as we now ship thousands of titles to book lovers across the globe. We pride ourselves in being a community of local book lovers which allows our passion and devotion to shine in everything we do. In 2020 we not only celebrated our 20th birthday but our 1st birthday as being completely employee owned after becoming an E.O.T in September 2019. We are proud to be different and embrace standing apart on a book mountain by working from a virtual inventory which allows us to provide thousands of books that may be difficult to get for your bookshelf or your studies. Working with a number of different suppliers allows us to explore other avenues such as puzzles, sheet music and even stationery so we really do have something for everyone. Life is about being versatile in all realms of existence. If this is your first purchase with us, or you are a returning customer, we would like to welcome you to the PBShop family, for there is no friend as loyal as a book. We are a company who put our customers at the centre of everything we do as we understand the importance of reading because once you learn to read, you will forever be free. There are a whole lot of things in this world of ours that we are yet to explore, which is why we will forever inspire curious minds.…

Spécialité

Hardbacks, Paperbacks

Profil professionnel du vendeur

Pbshop.co.uk

Unit 22 Horcott Industrial Estate, Horcott Road
Fairford, Royaume-Uni GL7 4BX

Contacter le vendeurConsulter les articles de ce vendeurAfficher la vitrine du vendeur

Conditions de vente

Returns Policy
We ask all customers to contact us for authorisation should they wish to return their order. Orders returned without authorisation may not be credited.
If you wish to return, please contact us within 14 days of receiving your order to obtain authorisation.
Returns requested beyond this time will not be authorised.
Our team will provide full instructions on how to return your order and once received our returns department will process your refund.
Please note the cost to return any unwanted order to us is borne by the buyer.
Should your order arrive damaged, not as advertised or faulty, we must be advised of this within 14 days of delivery. Please contact us so we can find the best solution for you.

Our Customer Care Team can be contacted by emailing alborders@paperbackshop.co.uk, or by calling our UK Office on +441285 712 917. We are available 9:00am till 5:30pm GMT Monday to Friday.

Droit de rétractation

Si vous êtes un consommateur, vous pouvez exercer votre droit de rétractation sur le contrat conformément à ce qui suit. Le mot « consommateur » désigne toute personne physique agissant à des fins qui n'entrent pas dans le cadre de son activité commerciale, artisanale ou professionnelle.

Informations concernant le droit de rétractation

Droit statutaire de rétractation

Vous avez le droit d'exercer votre droit de rétractation sur ce contrat dans les 14 jours sans donner de raison.

Le délai de rétractation expirera au bout de 14 jours à compter du jour où vous-même, ou un tiers autre que le transporteur et désigné par vous, prendrez physiquement possession de la dernière marchandise, du dernier lot ou de la dernière pièce.

Pour exercer votre droit de rétractation, remplissez électroniquement et envoyez une déclaration claire sur notre site Web, sous « Vos achats » dans « Votre compte ». Nous vous communiquerons sans délai un accusé de réception de cette rétractation sur un support durable (par exemple, par e-mail).

Pour respecter le délai de rétractation, il vous suffit d'envoyer votre message concernant l'exercice de votre droit de rétractation avant l'expiration du délai de rétractation.

Effets de la rétractation

Si vous exercez votre droit de rétractation sur ce contrat, nous vous rembourserons tous les paiements que vous avez effectués, y compris les frais de livraison (à l'exception des frais supplémentaires résultant du choix d'un mode de livraison autre que le type de livraison standard le moins cher que nous proposons).

Nous pouvons déduire du remboursement la perte de valeur de toute marchandise livrée, si la perte est le résultat d'une manipulation inutile de votre part.

Nous effectuerons le remboursement dans les meilleurs délais, et au plus tard 14 jours après le jour où nous aurons été informés de votre décision d'exercer votre droit de rétractation sur ce contrat.

Nous effectuerons le remboursement en utilisant le même moyen de paiement que celui que vous avez utilisé pour la transaction initiale, sauf si vous en avez expressément convenu autrement ; en tout état de cause, aucuns frais ne vous seront facturés à la suite d'un tel remboursement.

Nous pouvons suspendre le remboursement jusqu'à ce que nous ayons reçu les marchandises ou que vous ayez fourni la preuve que vous avez renvoyé les marchandises, en fonction de la première éventualité.

Vous devez renvoyer les marchandises ou les remettre à PBShop.store UK, Fairford, United Kingdom, +44 1285 712917, sans retard injustifié et, en tout état de cause, au plus tard 14 jours à compter du jour où vous nous avez communiqué votre décision de rétractation du présent contrat. Le délai est respecté si vous renvoyez les marchandises avant l'expiration du délai de 14 jours. Vous devrez prendre en charge les frais directs du renvoi des marchandises. Vous n'êtes responsable que de toute diminution de valeur des marchandises résultant d'une manipulation autre que celle nécessaire pour établir la nature, les caractéristiques et le fonctionnement des marchandises.

Exceptions au droit de rétractation

Le droit de rétractation ne s'applique pas à ce qui suit :

Distribution de journaux, de revues ou de magazines, à l'exception des contrats d'abonnement ; et
Fourniture d'un contenu numérique qui n'est pas fourni sur un support matériel (par exemple, sur un CD ou un DVD) si vous avez accepté, lors de votre commande, que nous puissions commencer à le livrer et que vous ne puissiez pas exercer votre droit de rétractation une fois la livraison commencée.

Conditions d'expédition

Orders are shipped from our UK warehouse. Delivery thereafter is between 4 and 14 business days. Please contact us if you have any queries about our services or products.

The Induction Motor Classic Reprint

A propos de cet article

Détails bibliographiques

Synopsis

A propos de ce titre