Hawkins electrical guide. Questions, answers & 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 treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 88
g coils. Ques. What are shading coils? Ans. Auxiliary coils as placed on fan motors in the mannershown in fig. 1,863. 1.346 HAWKI.XS ELECTRICITY Ques. How can single phase motors be started withoutthe use of external phase splitting devices? Ans. Such apparatus may be avoided by having the… … A1N COILS Fig. frame of copper, as indicated in the figure. This coil, or copper frame, is called a shadingcoil and it causes a phase difference between the pulsating flux that emanates from themain portion of each polar projection and the pulsating flux which emanates from thepole tip, thus…
Electrical engineering
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