Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 203
. Then if we were to increase the current to 0.4 ampere,it would l)e found that the voltage may not increase as muchfor the second 0.2 ampere as it did for the first. This, how-ever, will dei)end somewhat upon the normal voltage of themachine. In this case assume the normal voltage to be 110… … Q2 04 Ofc 06 Amperes in Field Coils 1.2 Fig. 199.—Direct-current generator voltage curve. the volts will only increase to about 120, and beyond this pointif the current is increased to 1.2 amperes, the voltage onlyincreases to 124. For the first 0.6 ampere supplied to the fieldcoils the voltage…
Electric machinery
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