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 218
le is shown with a width equal to 20 per cent,of that of the main pole. To obtain definite figures, it will be assumed that the machine atnormal speed, with the main poles excited to normal density, but withno excitation on the regulating poles, gives 250 volts direct currentpressure. Then with… … Pic 2.056.—Digram of field of regidataxig pole converter Hhistrating principles explained in be a converter, this method of varying the direct current voltage from200 to 300 volts does not give nearly as grea Inating current voltage; in fact, the latter voltage will be the samedelivering 200 volts…
Electrical engineering
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