Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 695
n intense field, with comparativelylittle expenditure of current energy ; and the pole projectionson the armature bring a part of the magnetic material of thecore almost directly into contact with the pole-pieces, so as toconcentrate all the lines of force traversing the field directlyupon the… … The ratio between the resistance of the armature and thenormal resistance of the exterior or working circuit, in thesemachines, is about one to forty, indicating the remarkably smallwaste of only 2| per cent, of the total current energy in thearmature. The plan of placing the field coils in derived…
Electrical engineering
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