Some Graphical Solutions of Electric Railway Problems (Classic Reprint) - Couverture souple

Buck, Alonzo Morris

Couverture souple

ISBN 10 : 1333940521 ISBN 13 : 9781333940522

Editeur : Forgotten Books, 2018

Synopsis

The digital edition of all books may be viewed on our website before purchase. Excerpt from Some Graphical Solutions of Electric Railway Problems



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A propos du livre

Présentation de l'éditeur

In the solution of railway problems involving the characteristics of the motive power it is difficult to use analytical methods, principally because it is impossible to obtain a satisfactory general equation for the curves of an engine or motor of any specified type. The relation between speed and tractive effort, for instance, is so involved that any attempt to obtain a formula leads to assumptions which cannot be made without seriously affecting the accuracy of the final result. This is true not only of the steam locomotive, but also of the various types of electric motors ordinarily used for train propulsion. The graphical methods, in contrast with the analytical, form an accurate and at the same time an easy means of attack applicable to any possible combination of characteristics and any range of conditions which may be met in practice. It is the purpose of this bulletin to develop a number of new graphical methods which, in connection with other well-known ones, aid materially in the solution of such problems. While most of these were developed in connection with problems of electric train performance, a number of them are equally applicable to any type of motive power, a fact which is set forth in the paragraphs which follow. The majority of these methods were developed by the writer in connection with classroom instruction. One of the ways of obtaining motor performance with varying potential and one for finding the effective value of the motor current are due to Mr. S. Sekine, a graduate student in Railway Engineering in the University of I llinois, who is also responsible for a portion of the method of plotting speed-time and distance-time curves. II. MOTOR PERFORMANCE WITH VARYING POTENTIAL! The performance characteristics of a railway motor are ordinarily furnished by the manufacturer for the normal potential and are usually assumed to be accurat
(Typographical errors above are due to OCR software and don't occur in the book.)

Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 1333940521
• ISBN 13: 9781333940522
• Reliure: Broché
• Nombre de pages: 42
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