Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 299
r and rx are connected by leads to dia-metrically opposite segments or coils of the armature at c and cx. It isobvious that as the armature revolves the greatest difference of potentialbetween the rings, or maximum E.M.F., will be at the instant the segmentsc and <?j pass under and coincide with… … E ROTARY CONVERTER Fig. 81. The maximum alternating E.M.F. will be equal to the continuous cur-rent voltage at the brushes B and Bx, and if the machine be designed toproduce a sinusoidal curve of E.M.F., then the alternating E.M.F., that is,the Vmean2 or effective E.M.F., will be, e = E sin 2w Nt.…
Electrical engineering
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