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 215
,000 X 400 _n r* .5 X 33,000 *5 Ques. What kind of current is suitable for elevatormotors? Ans. Either direct or alternating, preferably direct. ELECTRIC ELEVATORS 2,869 Ques. Why? Ans. Principally, because of the high starting torque of thedirect current motor. The chief difficulty experienced… … Fig. 4 132.—-Warner alternating current motor. It has a standard SDeed of QOO P P TV/r ft™.tvnCpyClTrCYtS »nd 750 R:P.M. for 25 cycle circuits, and ^fthf wound roto^sWWtype The slip ring type gives high torque with minimum starting current and ha. nrLr?twlU ir8^ ^regardless of load. An interesting…
Electrical engineering
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