Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 122
voltage and speedby means of a small shunt motor the losses of which are known.The machines are connected up as shown in Fig. 121, the generatoris then excited to give normal voltage E0 and the input to thesmall motor armature is determined from readings of the voltageEm and the current Ia. Under… … Fig. 120.—Machine Fig. 121.—Machine driven by a small motor theruns idle as a motor. efficiency of which is known. Measurement of the stray loss in a direct-current machine. 110. The efficiency of a machine = output/input and may becalculated from test data as in the following example. Draw the…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
