An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 232
Fig. 134. — Coil rotated in magnetic field. DIRECT-CURRENT GENERATORS 203 … (2) The commutation of large currents at the full voltagewhich is required for most commercial uses is not practicable.To overcome these difficulties coils must be uniformly dis-tributed over the surface of the armature, and the windingsmust be connected at equal intervals to commutator segments.…
Electricity · Magnetism
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