Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 175
in.in thickness. In the early type of machines the oxide on thesurface of the sheets was very largely depended on to in-sulate one from the other. Although this did not completelyinsulate the disks from each other, it offered considerableresistance to the flow of the current in the core parallel… … FlQ. 163.—Shows how armature cores are built up of thin sheets of iron. On account of the insulation the core has to be madeslightly longer than a solid core would be, in order to get inthe same volume of metal. Armature cores that ai-e built upof thin sheets of iron are said to be laminated, and…
Electric machinery
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