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 56
he lead being measured by the angle between theseplanes, as stated in the definition. 268 HAWKINS ELECTRICITY Ones. What may be said with respect to the angleof lead? Ans. For sparkless commutaion, the angle of lead varies withthe load. If the field be much altered at full load, it is evident that… … Fig. 289.—Diagram illustrating the demagnetizing effect of armature reaction. This resultsfrom the forward lead given the brushes in order to secure sparkless commutation. allow them to be shifted in different positions for different loads. A de-sirable point, then, in dynamo design is to make the…
Electrical engineering
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