Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 187
.226 c. Experiment 99. Change over the line terminals at the switch, ex-changing the positive for the negative, and note that the remainder ofthe set-up is undisturbed. Direction of rotation will remain unchanged. Speed Variation. —A variation of speedin a shunt motor may be obtained byshifting the… … RHEOSTAT tice is placingFig. 227.-Fieid Circuit, the resistancein series with the field circuit.
Electricity · Electrical engineering
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