Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 66
Fig. 21. Fig. 22. one leg, or on X\\q yoke which connects the two. The bestand most used bipolar arrangement is the enclosed type of … Fig. 23. Fig. 23, for the coils are almost completely surrounded byiron, thereby securing protection from mechanical injury,as well as avoiding excessive magnetic leakage. ARMATURES. 55 A typical form of multipolar field magnet structure isshown in Fig. 24, in which an even number of poles are…
Electric machinery
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