Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 80
different voltages. The Art. 62] ARMATURE WINDINGS 55 coils shown in the diagrams in this chapter have only one turnbetween adjacent commutator segments but, in order that thevoltages used in practice may be attained, it is generally neces-sary to make the coils as shown in Fig. 76 with several… … Fig. 77.—Eddy currents in a solid armature core. Fig. 78.—Laminatedarmature core. rotates, e.m.fs. are induced in the surface layers and force currentthrough the iron in the direction shown, which direction maybe determined by the right-hand rule. These currents cannot becollected and utilized but…
Electrical engineering
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