Electric transmission of energy and its transformation, subdivision, and distribution. A practical handbook (1894)
Kapp, Gisbert, 1852-1922 · New York, Van Nostrand · leaf 357
cated by thick lines, thusshowing at a glance how the poles advance with thechanging phases of the three-field currents. It will alsobe noticed that the number of ampere-turns producingmaximum induction at the poles varies between narrowlimits, namely, 2 It and ^/3 It, when I is the maximumcurrent… … ® FIELD CURRENT AND IMPRESSED FIELD. 339 course, equally to a drum-wound field. The averageexciting power producing tlie field is the mean betweenthese two values, or l-865/f,and if for the maximum valueof the current we insert the effective value i, we have theexciting power in ampere-turns…
Electric power production
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