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 69
lagging of the current in the arma-ture coils due to self-induction. THEORY OF THE ARMATURE 281 Ques. What is spurious resistance? Ans. This is an apparent increase of resistance in the arma-ture winding, which is proportional to the speed of the armature,and due to the lagging of the current.… … Fig. 299.—Distribution of magnetic lines through solid drum armature of a four pole machine. 1. Friction of bearings; 2. Friction of commutator brushes; 3. Air friction. The electrical losses may be classified as those due to: 1. Armature resistance; 2. Hysteresis; 3. Eddy currents. 282 HAWKINS…
Electrical engineering
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