Twentieth century hand-book for steam engineers and electricians, with questions and answers .. (1905)
Swingle, C. F. [from old catalog], Horstmann, Henry Charles, 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] · Chicago, F. J. Drake & co. · leaf 546
eparate exciter The two collector rings are ELECTRICITY FOR ENGINEERS 127 shown immediately at the right of the armature, whileat the right of the collector rings is shown the commu-tator from which the current for the composite windingof the fields is taken. The current generated by thealternator… … FIGURE 71. current or by means of a resistance box connected inthe fields of the exciting dynamo. This latter regula-tion is of course the more economical, as there wouldbe considerable energy wasted were a resistance usedin the main exciting circuit. Alternating currents aregenerally used where…
