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 159
to themotor, so that, with the return wire, only two wires are required. MOTORS 371 Ques. For what service are series motors speciallyadapted ? Ans. Series motors are used principally for electric railways,trolleys, and electric vehicles, and similar purposes where anattendant is always at hand to… … RHEOSTAT FIELD RHEOSTAT Fig. 419.—Speed regulation of a shunt motor. The speed of a motor depends on the voltageof the current supplied and the field strength. The motor tends to rotate so fast as toproduce a reverse voltage nearly equal to that supplied to the brushes; hence, the speedvaries with…
Electrical engineering
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