Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 266
apped at four points as shown in Fig. 274,the voltage Ex between the slip rings 1 and 2 is a maximum whenthe armature is in the position shown, while the voltage E2between the rings 3 and 4 is zero at the same instant, and E2 Art. 270] ALTERNATORS 241 lags Ei by 90 degrees so that the machine is…
Electrical engineering
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