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 67
s though some of itsrevolutions were not effective in inducting electromotive force. THEORY OF THE ARMATURE 279 The name dead turns is given to the number of revolutionsby which the actual speed exceeds the theoretical speed forany output. Again, this term is sometimes used to denote that portionof… … Fig. 297.—Magnetic hysteresis in armature core. Unlike poles are induced in the core oppositethe poles of the field magnet. Since on account of the rotation of the core the inducedpoles are reversed a thousand or more times a minute, considerable energy is required tochange the positions of the…
Electrical engineering
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