Electrical engineer's pocket-book: a hand-book of useful data for electricians and electrical engineers (1901)
Foster, Horatio A. (Horatio Alvah), 1858-1913 · New York, D. Van Nostrand co.; London, E.& F.N. Spon, ltd. · leaf 268
on type the formula for determining the number of coils is S = ny ± 2,and Fig. 46 is a sample diagram of one of the type. Two-circuit Multiple-wound Multipolar Rings. — The for-mula for determining the number of coils and other factors for this classof windings is ARMATURES. 255 £=— X y±m where S=… … The following figure is a diagram of a two-circuit doubly re-entrant, doublewound ring armature :
Electrical engineering
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