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 238
out more and more of the resistance, until finally the 226 DYNAMO ELECTRIC MACHINERY. armature is operating on the full voltage of the supplycircuit. A shunt motor may have its armature coils destroyedby an excessive rush of current resulting from a droppingor interruption of the supply voltage… … Armature Fig. 139. cient cross-section. An armature may also be burned outby an excessive current due to overloading the motor.The resulting lowering of its speed is accompanied by acorresponding lowering of the counter E.M.F. Again, anabnormal voltage, which might result from some cross orother…
Electric machinery
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