Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 351
■■-^ A^--- … X-;^ Fig. 279 Fig. 380 F.g. 381 Figs. 379 to 3.81.—Illustrate in an elemcntarv way how a two-phase voltage is generated. zero, while that between h and b will have increased to a max-imum. Three-wire Two-phase Systems.—From the foregoing it isevident that two e.m.f. s may be taken from the same…
Electric machinery
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