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 295
nly necessary to arrange one of the motors of the number for preventingthis trouble, but better to make all alike. A copper shield between pole-pieces, and covering a portion of the pole-tip, will prevent the trouble ; andthe Westinghouse Electric and Manufacturing Company use a heavy copper jstrap… … ^o resultant. Fig. 77. Take the origin at 0.Let E represent maximum value. e = instantaneous value,ex = Ex sin (pt. + <£),e2= E2 sin (pt. — $),where p — 2w n, and n number of complete periods per second. e = E0 sin (pt. — <jj)where i// = angle of lag of Z?n with respect to the origin.E02 = E*…
Electrical engineering
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