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 262
re do not begin to moveat the first point, the ann should be thrown back and the trooble located. OPERATION OF MOTORS 681 minimum, as well as the speed at which the motor has to run, in order todevelop sufficient reverse voltage to permit this current to flow. Regu-lation of speed by varying the… … Tj Earth /iG. 758.—Speed regulation of a series motor by the method of short circuiting sections of thefield winding. It will be seen that there are seven different positions for the contactsprings on the barrel contacts. A. represents the armature and brushes, little A, B, and C.the divided field…
Electrical engineering
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