Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 114
pole to decrease as the load in-creases, see page 84, so that the speed, being equal to k(Ea —IaRa)/(f> remains approximately constant from no-load to full-load, since the decrease in the value of (Ea — IaRa) is compen-sated for by the decrease in the value of <£. Shunt motors are suited for… … Fig. 111.—Insert resis-tance in the field circuit toincrease the speed. Fig. 112.—Insert resistanc^n thearmature circuit to decrease thespeed. Methods of adjusting the speed of a shunt motor. To increase the speed, 0 the flux per pole must be reduced by in-serting a resistance in series with the…
Electrical engineering
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