Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 275
ods overwhich mica tubes are previouslyplaced. Controllers for hoistduty are provided with higherresistance than those for travelduty so as to insure goodspeed control under lightloads. 109. Compound-wound Mo-tors. — In a compound-woundmotor the magnetomotive forceof the shunt winding may as-sist… … 264 DYNAMO ELECTRIC MACHINERY. The magnetic field of a compound motor becomes moreintense with increasing load, and consequently the speeddecreases ; the amount of speed decrease will depend uponthe relative magnetomotive forces of the two windings.At light load there is always a definite field…
Electric machinery
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