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 80
NEUTRAL PLANE COMMUTATINCPLANE … PERIOD OFCOMMUTATION Figs. 309 to 313.—How sparkless commutation is obtained by advancing the brushesbeyond the neutral plane; commutation progressively shown. Fig. 309.—Commutation begins; current flows up both sides of the armature, uniting at Sand flowing to the brush through commutator segment…
Electrical engineering
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