International Library of Technology · Scranton, International Textbook Co. · leaf 164
at theseries coils are con-nected so as to opposethe shunt coils insteadof aid them as in thedynamo. The objectof this arrangementis to secure constantspeed when the voltageof the dynamo supply-ing the motor is con-stant. The series coilsdecrease the field fig- i420. strength slightly, and by thus… … ^540 MOTOR DESIGN. motor will give sufficiently close speed regulation for allpractical purposes. Fig. 1420 shows the connections of adifferential motor, the coils being intended to representwindings in opposite directions, one right-hand, the otherleft-hand. AUXILIARY APPARATUS. STARTING…
Electrical engineering
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