Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 106
ges automatically tosuit the mechanical load on themotor. The back e. m.f. of the motor regulates the flow of current in the same way as the gover-nor regulates the flow of steam in a steam engine. A 110-volt direct-current motor, connected to the mains as shown in Fig. 105delivers 10 h.p. If the… … Fig. 105. a. the motor outputthe motor input 10 h.p.output efficiency 100.8811.35 X 746 = 11.35 h.p. 8480 watts b. h, the current from the mains watts input applied voltage 8480 mm = 77 amp. 110 82 PRINCIPLES OF ELECTRICAL ENGINEERING [Chap.xiv c. the armature current = the total current — the…
Electrical engineering
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