. 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. Pig. —Section of two phase winding f the coil erds. Every other coil is flat, while the alternates have their end- as shown. With respet: at the coil ends, it is called a tvo route windimt. CONSTRUCTION OF ALTERNATORS 1,239 Ques. How must the coils be constructed for two phasewindings? Ans. They must be made of two different shapes, one bentup


. 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. Pig. —Section of two phase winding f the coil erds. Every other coil is flat, while the alternates have their end- as shown. With respet: at the coil ends, it is called a tvo route windimt. CONSTRUCTION OF ALTERNATORS 1,239 Ques. How must the coils be constructed for two phasewindings? Ans. They must be made of two different shapes, one bentup out of the way of the other, as in fig. 1,534. There are numerous kinds of two phase windings; the coils may beconcentrated or distributed, half coil or whole coil, etc. Fig. 1,530 showsa two phase winding with four slots per pole, and fig. 1,533 one withsix slots per Pig. 1,535.—Section of Triumph armature showing method of arranging the three phase winding. Three Phase Armature Windings.—On the same generalprinciple applicable to two phase windings, a three phase windingcan be made from any single phase winding, by placing threeidentical single phase windings spaced out successively along the HAWKINS ELECTRICITY PHA5E APHASE B


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