. Practical electricity in medicine and surgery. ance. In the other method the external circuit and thefield-coils are in multiple arc, or in shunt relation, and thedynamo is then called a shunt dynamo (Fig. 117). In the firstcase (Fig. 116) the current flows out from the armature (VA),through the field-coils (F), through the external circuit (R), MOTORS AND DYNAMOS. 129 back to the armature. In the second case (Fig. 117) the cur-rent flows out from the armature (VA), part going then throughthe field-coils ( V#) and part through the external circuit (7?),afterward uniting and flowing back thro
. Practical electricity in medicine and surgery. ance. In the other method the external circuit and thefield-coils are in multiple arc, or in shunt relation, and thedynamo is then called a shunt dynamo (Fig. 117). In the firstcase (Fig. 116) the current flows out from the armature (VA),through the field-coils (F), through the external circuit (R), MOTORS AND DYNAMOS. 129 back to the armature. In the second case (Fig. 117) the cur-rent flows out from the armature (VA), part going then throughthe field-coils ( V#) and part through the external circuit (7?),afterward uniting and flowing back through the motors and dynamos receive often the name constantpotential machines, because, when they are properly made, suchmachines, used as dynamos, give at constant speed a constantelectro-motive force, and when used as motors and supplied withcurrent at constant potential,—as, for instance, when joinedto a number of storage cells,—run at a constant speed, no matterwhat work they may be doing. It is scarcely necessary to point. Fig. 116.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectri, bookyear1890
