Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 332
Cycle ^- >1 … Fig. 347 Fig. 348 Fig. 347.—Eepresents an alternating current or voltage cycle.Fig. 348.—Represents the magnetic field of four-pole machine. One should be careful not to confuse this with geographicalor space degrees, although they are the same for a two-polemachine. In a four-pole machine the…
Electric machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
