TransactionsPublished under the care of the General Secretary and the Treasurer . Amp. u sec. -»-Time Je=^Y Ei=£1 5.^ 10^ Henry n=270. ?»;;;= di/^^Fig. 49. Slight /370 sec. Je=&. .Bj= 5^ 10* Henry n=1475. ?;;.= my/^^^ Fig. 50. Veby Stbong Spabklng. 856 ARNOLD AND LA COUR: COMMUTATION. enced by the current flowing over the commutator during the com-mutating process. In the oscillograms the curves of current andvoltage, marked respectively a and h, are for the sake of clearness,plotted on opposite sides. Moreover, the sine curves are dotted
TransactionsPublished under the care of the General Secretary and the Treasurer . Amp. u sec. -»-Time Je=^Y Ei=£1 5.^ 10^ Henry n=270. ?»;;;= di/^^Fig. 49. Slight /370 sec. Je=&. .Bj= 5^ 10* Henry n=1475. ?;;.= my/^^^ Fig. 50. Veby Stbong Spabklng. 856 ARNOLD AND LA COUR: COMMUTATION. enced by the current flowing over the commutator during the com-mutating process. In the oscillograms the curves of current andvoltage, marked respectively a and h, are for the sake of clearness,plotted on opposite sides. Moreover, the sine curves are dotted,according to which current and voltage would have varied approxi-mately if the current had not been broken from time to time. As may be seen from the oscillograms, the additional currentis chiefly dependent on the present at the moment, and inthe second place, at the breaking of the current, the same phe-nomena appear in the voltage curve as upon application of a con-stant voltage. Hence, follows that all the conditions deduced forgood commutation in direct-cun*ent machines may be applieddirectly to the alternating-current machine. We have thus first to determine the maximum e.
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