Hawkins Electrical Guide

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Excerpt from Hawkins Electrical Guide: Number 6, Questions, Answers and Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to Acquire a Working Knowledge of Electricity and Its Applications, A Practical TreatiseParts, construction - field windings for induction mo tors - calculation for revolutions of rotating field, objection to high speed of field - diificulty with low frequency currents general character of field winding - formation of poles grouping of coils - starting of induction motors: external resistance, auto-transformer, internal resistance methods internal resistance induction motors, adaptation - how resistance is cut out - why not desirable for large sizes external resistance or slip ring motors - operation armature connections - single phase induction motors service suitable for - disadvantage - parts - why not self starting - how started - phase splitting, production of rotating field from oscillating field - methods - starting coils - shading coils - character of the starting torque modification of armature for starting with heavy load clutch type of single phase induction motor, its action in starting commutator motors classification action of closed coil rotating in alternating field - the transformer pressure generated pressure self-induction pressure local armature currents, reason for sparking, how reduced - high resistance connectors - effect of low power factor efiect of frequency - series motor - features - adaptation neutralized series motor - conductive method - inductive method - shunt motors - repulsion motors difficulty with early motors - means employed to stop sparking essentials of single repulsion motors - the term repul sion induction motor - oompensated repulsion motor power factor of induction motors - its importance false ideas in regard to power factor - speed and torque of motors.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.