International Library of Technology · Scranton, International Textbook Co. · leaf 54
s ex- \ \^—^5—Y-.3q plained later on. 3611. The ef-fective length of thearmature is not 7^inches, as given inthe diagram. Fig. 1355; each disk is separated from itsneighbor by some insulating substance, whether it be paper,or varnish, or simply the oxide which is upon the surface, sothat the actual… … Fig. 135(3. 5i430 DYNAMO-ELECTRIC MACHINE DESIGN. 3612. The average polar span, Fig. 1355, is 125°; then,the number of teeth under one pole will be ^^ x 36 = 12.The total area of the teeth under the magnet pole will be 12 X2.233 equals, say, 26.8 square inches. The density of linesof force in the…
Electrical engineering
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