Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 172
core, theyhave to be wound in place by hand. On account of havingto thread the coils through the center of the core, the placingof the winding is a somewhat long and tedious job. Theseand other structural and electrical defects have caused thistype of construction to be practically abandoned in… … Commufator. ~- Pig. 161.—Smooth core for drum-type armature. slots in the corner of the core, as shown, to facilitate thespacing of the coils around the periphery. One of the seriousobjections to the use of solid cast-iron cores was that theyhad heavy current generated in them, which not only…
Electric machinery
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