International Library of Technology · Scranton, International Textbook Co. · leaf 497
e suppliedby the primary orsecondary battery B, fig. 1193. although another dynamo may be used, if desired. In orderto adjust the current in the magnetizing coils to the propervalue, or to vary it if necessary, an adjustable resistancer is included in the field circuit. The armature has no… … 2030 APPLIED ELECTRICITY. Ing to the nature of the source of the current, a large or asmall number of turns being used in the magnetizing coilsto give the necessary magnetizing force. Alternators are usually separately excited, since the cur-rent given out by the machine, being alternating, can not…
Electrical engineering
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