International Library of Technology · Scranton, International Textbook Co. · leaf 359
32 THEORY OF ALTERNATING order to reduce the speed of rotation. In the single-phasemachine shown in Fig. 1576, it was necessary to have onlyone connection to each ring; in a multipolar machine it isnecessary to have as many connections to each ring as thereare pairs of poles on the machine. Fig.… … Fig. 1580. If only two connections were made, as in Fig. 1576, the wholeof the winding would not be utilized. Fig. 1581 representsthe same armature connected up as a three-phase rotary.Here each of the three rings has three connections as before, CURRENT APPARATUS. 2733 and these connections are…
Electrical engineering
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