The standard manual of dynamos and practical application of dynamo-electric machinery (1915)
MacFadden, Carl K. [from old catalog], Ray, William D., [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 127
indicating direction of current, as -|- is current enter-ing and — current leaving. The field magnets are shown marked N and S. Thenorth pole N attracts the magnet of the south pole ofthe armature S, and the south pole S of the magnetattracts the north pole N, of the armature. For thisreason motion… … FIGURE 34.—KLECTRIC MOTOR. a position where the segment which had previously beenin contact with the + brush, has now moved so as to bein contact with the — brush, and the opposite segment isnow in contact with the + brush. This must reverse the current in the armature and alsothe magnetism and the…
Electrical engineering · Electric machinery
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