. Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise. gnets are attached by through neld coils are of copper strap bent on end, the land generally used on large series connection of the coils is plainly shown, also the two cables leading via one ofthe spokes to the slip rings. rRCCTIOX OF ALTERXATORS 1,197 Ques. Describe theconstruction of a re-volving field. Ans. The entirestructure or
. Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise. gnets are attached by through neld coils are of copper strap bent on end, the land generally used on large series connection of the coils is plainly shown, also the two cables leading via one ofthe spokes to the slip rings. rRCCTIOX OF ALTERXATORS 1,197 Ques. Describe theconstruction of a re-volving field. Ans. The entirestructure or rotor con-sists of a shaft, hub orspider, field magnets andslip rings. The magnetpoles consist of lami-nated iron st ampi ngsclamped in place bymeans of through boltswhich, acting throughthe agency of steel endplates, force the lami-nated stampings into auniform, rigid mass is magneti-cally sub-divided into somany small parts thatthe heating effect ofeddy currents is reducedto a minimum. The coresare mounted upon a hubor spider either by dove-tail construction or bymeans of through bolts,according to the cen-trifugal force which theymust withstand in oper-ation, either method per-mitting the easy re-moval of any particular. Fig. 1,464.—Wagner cast steel hub with dovetailgrooves for attaching the revolving field construction is generally used on machines ofsmall and medium size.
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