An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 266
ve frequently to be quicklyreversed, as in elevator service. We have already seen (sec-tion 154) that interpoles or commutating poles are very im-portant for the successful operation of a generator. Theseinterpoles are even more important in motor operation, becausethe load variations are more… … Fig. 166. — Shifting of brushes ina generator and in a motor. 162. Back e.m.f. in a motor. Suppose we connect an incan-descent lamp in series with a small motor. If we hold the armaturestationary and throw on the current from a battery, the lamp willglow with full brilliancy, but, when the armature…
Electricity · Magnetism
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