International Library of Technology · Scranton, International Textbook Co. · leaf 292
pound-wound CURRENT APPARATUS. 2665 continuous-current dynamos. One set of windings is sep-arately excited by means of the exciter E^ and is providedwith a rheostat R^ as in the previous case. The field of theexciter is also provided with a rheostat r. The greater partof the current furnished by… … r^^^tSMSJ Fig. 1522. magnetism necessary for the generation of the voltage atno load, and the series coils furnish the additional magnet-ism necessary to supply the voltage to overcome the arma-ture impedance. 3968. The current flowing in these series coils mustnot be alternating, because if it…
Electrical engineering
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