International Library of Technology · Scranton, International Textbook Co. · leaf 158
eld Fconnected directly across the mains. This method is ratherwasteful of energy, but it is the one generally employed MOTOR DESIGN. 2533 when it is desired to control the speed of a shunt machine.If a shunt motor be overloaded or stalled in any way, thecurrent becomes excessive, and the armature… … KsmQ^imm^LT Fig. 1415. the field circuit is opened, the machine is unable to generateany counter E. M. F., and the consequence is a large rush ofcurrent through the armature, which is at least apt to burnthe commutator, and if not interrupted by means of fuseswill in a short time burn out the…
Electrical engineering
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