Swingle's catechism of steam, gas, and electric engineering ... a complete book of reference for the working engineer in the daily round of his duties (1922)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 147
d ring armatures only. It is the only methodthat can be used with ring armatures, and also with drumarmatures where the wire is to encircle the whole armature.The larger dynamos are now made mostly multipolar, andin these the coils do not return at nearly, or wholly, diam-etrically opposite points… … Fig. 540 wound drum, or ring armature in connection with manvpoles, it is not customary to do so. In general the coilwound on a multipolar armature has its return windingspaced about as far from the first turn, as it is from thecenter of one pole piece to the center of the next one. 865. How does…
Engineering · Mechanical engineering
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