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 84
X o … COMMUTATION AND THE COMMUTATOR 297 3. In this way the current is reversed in C, and, if the brush bebroad enough to allow a sufficient time interval, the currentin C is built up to its full value before segment 3 leaves thebrush, thus securing sparkless commutation. This contact resistance factor…
Electrical engineering
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