. The Street railway journal . 6 gives efficiency, speedand power factor curves of the W. E. I. single-phase motorused in this test. The dark lines indicate the different trans-former ratios employed to obtain the different speeds. Thediagram given for the direct-current train were calculated for Trolley wire 2500 volts 42 period tion. The diagram clearly proves that the single-phase motoris eminently suitable for heavy traffic and rapid acceleration,or, in other words, for handling suburban trains. Having considered both the general question of electrictraction on railways, and also what part
. The Street railway journal . 6 gives efficiency, speedand power factor curves of the W. E. I. single-phase motorused in this test. The dark lines indicate the different trans-former ratios employed to obtain the different speeds. Thediagram given for the direct-current train were calculated for Trolley wire 2500 volts 42 period tion. The diagram clearly proves that the single-phase motoris eminently suitable for heavy traffic and rapid acceleration,or, in other words, for handling suburban trains. Having considered both the general question of electrictraction on railways, and also what particular type of motor,at any rate as far as Great Britain is concerned, may be ex- son Cos V / c %^/ / 0 t c ,.^r & e -.,< f)\ / ^00 1000 < f 0 1 y _Prvjver^ ^ii^ 800 — z^ Z F^ Etiiie ^ ^ V ■ / [/ fiOO / / y ,/ y ^ vl» U ion /. / / ^ ^ ^oV^ _,J -^ i^ ^ j\ i. Kim U ^ 0 ^0 n nirsL. Lnw .•r 5U 100 150 200 250 FIG. 9.—CHAR.\CTERISTIC CURVES. OERLIKON 200-IIP SINGLE-PHASE MOTOR. FIG. 7.—DIAGRAM OF WINTER-EICH- BERG MOTOR CONNECTIONS ON STUBAITHAL BAHN Note;— Besides windings shi a compensator which work Bhortrciredited put in tjciiea stilli tbe current. FIG. eight GE 66 motors, manufactured by the Allgemeine Elek-tricitats Gesellschaft. The single-phase diagram includeseight W. E. I. Winter-Eichberg motors. It will be seen that the maximum kw is somewhat greaterin the case of a single phase than in direct current, but it willbe observed that this maximum comes at a later stage than inthe case of the direct current and that the result of it is ahigher rate of acceleration during the final period of accelera- pected to be the one which will be most generally adopted, asummary of the heavy traction work which has so far beencarried out in Europe may not be out of place. Apparently, with the exception of Mr. Westinghouse andthe New York, New Haven & Hartford Railway, the majori-ty of American engineers seem still to be greatly in favor o
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
