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 267
windings. Mr. Kapp gives, in the following table, the best practice as to angulardistance between brushes for this class of windings. 254 Numberof poles. Angular distance between brushes. Degrees. Degrees. Degrees. Degrees. Degrees. 2 180 4 90 6 60 180 8 45 135 10 36 108 180 12 30 90 150 14 25.7 77… … Fig. 45. Both of the above samples are of the long-connection type. In the short-connection 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…
Electrical engineering
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