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 149
namo used as a motor, the direction in which thearmature will rotate is easily found by the left hand rule, as MOTORS 361 illustrated in fig. 411, when the polarity of the field magnets andthe direction of currents through the armature are known. Ques. How may the rotation of a motor be reversed?… … Fig. 401.—Fairbanks-Morse wire wound armature coils. These coils are form wound and arethoroughly insulated and baked before assembling in the slots. Material of great mechan-ical strength as well as high insulating value is used, and the coils are subjected to dippingsin insulating compound and to…
Electrical engineering
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