. 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. Fig. —Western Electric station-ary armature. In this type ofarmature, the core upon which thewinding is placed, is built into theframe as shown, the core teeth pro-jecting inwardly like internal gearteeth, forming a cylindrical cham-ber for the revolving field. The coreis built up of iron, laminated andjapanned to prevent eddy currentsand hysteresis l
. 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. Fig. —Western Electric station-ary armature. In this type ofarmature, the core upon which thewinding is placed, is built into theframe as shown, the core teeth pro-jecting inwardly like internal gearteeth, forming a cylindrical cham-ber for the revolving field. The coreis built up of iron, laminated andjapanned to prevent eddy currentsand hysteresis losses. The lamina-tions are rigidly bolted betweentwo heavy end plates. The arma-ture coils are of copper bar im-pregnated with insulating com-pound. They are held in the slotsby wedges which allow their readyremoval for inspection or repairs. HAWKIXS ELECTRICITY --. h respect tothe core. I b. Disc; c. Drum. > . - : : .— .---an met ■ pioyed by Paeir. .-A afterwardsadopted by Brash in his -:I -i^ :;. r-rr. >. The leaoa tailed Forme-rhaniral reasons, bat elec- • improvement upon the Pi ■■■mi. rr- ■_- --^- .-_ doctors on both sides ofthe ring are active, thesebeing connected together- ; umferential :- rr. poll I ;• , corresponding to theeadc tmectaoaa ■ no dera■nm niiMilmT%i 3. With respec-the core surface, as b. Slotted core. M KSBCfl windings wereplaced op ■ an b ■ nanwith a smooth fisadvantag* I thai arrangement is that the B MBH • : H MJ — ; HPOa ••:-■-•..-:■:■•displace them around thearmature. To prevent. INSTRUCTION OF ALTERNATORS 1,205 D0VETAIL6R00VES
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