Publisher's Synopsis
Excerpt from Notes on the Applications of Electrical Machinery
Duction of armature reaction. Sparking at the brushes is limited as much as. Possible by the use of symmetrical windings, a maxi mum number oi commutator bars producing a commutator of ample proportions, and by the use of carbon brushes. The brushes may thus be set on the normal diameter of commutation and do not have to be changed with the load or direction of arma ture rotation. These motors carry more copper in proportion to iron than do the generators, and as a rule thev are lighter and more compact than generators.
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