Alternating Current Resistance And Inductance Of Single Layer Coils

Author : C. N. Hickman
Publisher : Forgotten Books
ISBN 13 : 9780484629072
Total Pages : 36 pages
Book Rating : 4.6/5 (29 download)

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Download or read book Alternating-Current Resistance and Inductance of Single-Layer Coils (Classic Reprint) written by C. N. Hickman and published by Forgotten Books. This book was released on 2017-12-24 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Alternating-Current Resistance and Inductance of Single-Layer Coils Several formulas for the alternating-current. Resistance and inductance of single-layer coils have been published. However, the results Obtained by applying these formulas to Specific coils are so widely different that it has been thought advisable to treat the subject in an entirely different manner. Most of the past writers on the subject started with the field equations and by making various assumptions were able to Obtain a solution of the problem. An integral equation method is used in this paper to develop formulas for the alternating-current resistance and inductance Of single-layer coils. Owing to the paucity Of experi mental data, several coils were constructed and the resistance and inductance Of them were measured at several frequencies. One of the first writers on this subject was Sommerfeld.1 His assumptions are that the field about the coil under consideration is the same as if the coil were infinitely long. Furthermore, he neglects the effect of the-spacing. This leads to results which are far from correct. In his original work he Obtained a formula for the resistance only. His method was used by Coffin2 to develop a formula for the inductance. In Sommerfeld's later work he takes into consideration the size and shape of the wire with which the coil is wound and also the spacing between the wires. Even this formula does not check experimental results Obtained by this bureau. Breit3 has applied an end correction to Sommerfeld's formula which gives much better values but which are still quite different from our measured values. Cohen' has developed a formula for high frequencies but it is based on the assumption that the field about the wire is the same as if the wire were square and the spacing zero. 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.