Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 312
in j, seconds, therefore the speed of the revolving field = o~ X 4/ rev. per sec. 120/ = rev per. mm. V This is called the synchronous speed, and is the speed at which an alternator with the same number of poles must be run in order to give the same frequency as that applied to the motor, the table… … Fig. 337.—Directionof the e.m.f. in therotor bars. Fig. 338.—Directionof the currents in thebars of a low resistancerotor. Fig. 339.—Directionof the currents in thebars of a high resistancerotor. be represented by a revolving north and south pole as shown inFig. 337. The field is moving in the…
Electrical engineering
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