. 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. ofarmature winding to meet the varied conditions of dividing these forms of winding into distinctive groins. *may be classified, according to several points of view, as follows. 1. With respect to the form of the armature, as: a. Revolving; b. Stationary. 2. With respect to the mode of progression, as: a. Lap •winding; b. Wave winding. 3. With
. 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. ofarmature winding to meet the varied conditions of dividing these forms of winding into distinctive groins. *may be classified, according to several points of view, as follows. 1. With respect to the form of the armature, as: a. Revolving; b. Stationary. 2. With respect to the mode of progression, as: a. Lap •winding; b. Wave winding. 3. With respect to the relation between number of polesand number of coils, as: a. Half coil winding; b. Whole coil winding. 4. With respect to the number of slots, as: a. Concentrated or uni-coil winding; b. Distributed or multi-coil winding. Partially distributed;distributed. 5. With respect to the form of the inductors, as: a. Wire winding; b. Strap winding; c. Bar winding. 6. With respect to the number of coils per phase per pok a. One slot winding; b. Two slot winding; etc CONSTR UCTION OF AL TERN A TORS 1,211 7. With respect to the kind of current delivered, as: a. Single phase winding; b. Two phase winding; c. Three phase Pig. 1,4S5.—Section of Western Electric stationary armature core showing laminations clampedin place, and ventilating ducts. The stator or stationary armature consists of soft ironlar jnations assembled in the magnet frame with stator coils embedded in the core laminations are punched separately and then carefully annealed to reduce hysteresislosses. After annealing, a coat of japan is applied, effectively preventing the flow of eddycurrents in the assembled core. The frame is cast iron and of the box type frames of the smaller sizes are cast in one piece, while frames of the larger sizes aresplit to facilitate installation. Large openings are provided in the box type frame, in orderto improve the ventilation. The lamina
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Keywords: ., bookcentury1900, bookdecade1910, bookidhawkinselect, bookyear1914
