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 78
NEUTRAL PLANE … .COMMUTATION BEGINS Figs. 305 to 308.—Improper brush adjustment resulting in excessive sparking. When thebrushes are not advanced far enough, commutation takes place before the short cir-cuited coil reaches the neutral plane, hence, its motion is not changed with respect tothe magnetic field so as…
Electrical engineering
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