Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 182
e di'ooping characteristic of the tractive power of the direct-current motor at high speeds as shown in Fig. 5, gives the single-phase motor some advantages for general work. CURVES SHOWING COMPARATIVE CHARACTERISTICS OF IIOOO VOLT SINGLE PHASE AND 1500 VOLT DIRECT CURRENT 70,000 ELECTRIC… … FIG. 5 One of the big differences between the direct-current and the other systems is the fact that the direct-current system requires more substations than the other system and that motor generators have to be used in them, requiring the necessity of permanent attendants ; whereas the single-phase…
Engineering
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