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), 1833-1928 · New York : T. Audel & Co. · leaf 55
s is a plane passing through the axis of the armatureand through the center of contact of the brushes as shownin figs. 289 and 300, THEORY OF THE ARMATURE 267 Owes. What is the angle of lead? Ans. The angle between the normal neutral plane and thecommutating plane. In the operation of a dynamo… … AXIS OF ARMATURE Fig. 288.—Normal neutral plane. This is a reference plane from which the lead is measured.As shown, the normal neutral plane lies at right angles to the lines of force of an undistortedfield. obliquely across, a few degrees in advance. Hence, for sparkless com-mutation, the…
Electrical engineering
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