The practical testing of dynamos and motors (1905)
Smith, Charles Frederick, 1873- · Manchester Scientific Pub. Co · leaf 290
factors ia djmamo design for producingsparkless running. Regulation by Shifting Brushes.—In some cases it isnecessary to provide for very great movement of thebrushes. Thus for^^some special purposes the speed of amotor is regulatedj^by moving the brush rocker round.Motors specially designed for… … Fig. 95.—curve of Potential Round the Commutator, machine Working as Motor. where the added voltage is very low. For regulating thevoltage of the machine by means of a resistance in serieswith the field winding in the usual way a very large 276 MISCELLANEOUS TESTS. and expensive resistance would be…
Dynamos · Electric motors
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