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 76
uplex wind-ing may be either singly or doubly re-entrant, a triplexwinding may be either singly or triply re-entrant, and aquadruplex winding maybe singly, doubly, or quad-ruply re-entrant. Multi-plex windings beyondthese are rarely used inpractice. The general formula formultiplex wave windings is… … ARMATURES. 65 mean winding pitch, and therefore also the total numberof inductors, depends upon the degree of re-entrancydesired. The highest common factor of X and _y expressesthe degree of re-entrancy. Thus, for the duplex windingof Fig. 31, y ^ 2 and ^ = 9) therefore the winding must be singly…
Electric machinery
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