. Practical physics. 90° 180° 270° 360° etc. Fig. 314. Curve of commutated electromotive force each to a portion of the armature coil in tlie manner shownin Fig. 313. The result of using a simple split-ring com-mutator is shown graphically in Fig. 314. 300 INDUCED CUREENTS. Fig. 315. The direct-currentdynamo, drum winding 356. The drum-armature direct-current dynamo. Fig. 315 is a diagramillustrating the construction of a commercial two-j)ole direct-currentdynamo of the drum-armature a given instant currents are being-induced in the same direction in allthe conductors on the left half
. Practical physics. 90° 180° 270° 360° etc. Fig. 314. Curve of commutated electromotive force each to a portion of the armature coil in tlie manner shownin Fig. 313. The result of using a simple split-ring com-mutator is shown graphically in Fig. 314. 300 INDUCED CUREENTS. Fig. 315. The direct-currentdynamo, drum winding 356. The drum-armature direct-current dynamo. Fig. 315 is a diagramillustrating the construction of a commercial two-j)ole direct-currentdynamo of the drum-armature a given instant currents are being-induced in the same direction in allthe conductors on the left half of tliearmature. The cross on these conduc-tors, representing the tail of a retreat-ing arrow, is to indicate that thesecurrents flow away from the are induced in the con-ductors at the top and bottom of thearmature, where the motion is parallelto the magnetic lines. On the righthalf of the ring, on the other hand, the induced currents are all in theopposite direction, that is, toward the reader, since the conductors arehere all moving up instead of down. The dot in the middle of theseconductors represents thehead of an approachingarrow. It will be seen, how-ever, in tracing out the con-nections 1, Ip 2,2j, 3,3p etc.,of Fig. 315 (the dotted linesre
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysics, bookyear1922
