Practical electricity .. with questions and answers (1911)
Cleveland armature works, [from old catalog] comp, Lincoln, John C. [from old catalog] · [Cleveland, Ohio, Cleveland armature works] · leaf 236
uM beattached to bars Nos. 10 and 28. By a proper combinationof two-phase or three-phase currents it is possible to pro-duce a revolving pole. By placing inside of the apx)iaratuswhich produces this revolving pole a short circuited arma-ture, this will be dragged around by the revolv-ing pole in… … Figure 86 iH^eUiod of producing three phase current from the commntatofof a bipolar armature. The great advantage that alternating currents possessover direct currents is that they can be transformed from alow voltage and a large current to a high voltage, and imiallcurrent without any moving…
Electricity
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