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- · New York, T. Audel · leaf 216
resultant planeof the field with respect to thedirect current brushes. One of these parts is perma-nently excited and it producesnear its edge the fringe of fieldnecessary for sparkless commuta-tion. 1,474 HAWKINS ELECTRICITY Regulating Pole Method.—As applied to the rotary con-verter regulating… … Fig. 2,054.—General Electric regulating pole rotary converter. The field structure is dividedinto two parts, a main pole and a regulating pole. The ratio between the voltages onthe direct current and alternating current sides may be readily varied by varying theexcitation of the regulating poles,…
Electrical engineering
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