Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 310
which Art. 311] POLYPHASE INDUCTION MOTORS 285 goes through one revolution while the current in one phase passesthrough one cycle. 311. The Revolving Field of a Three-phase Motor.—DiagramP, Fig. 335, shows the winding for a two-pole three-phase motor;M, N and Q, the windings of the three phases,… … A B c D ii = im Z]= Vilm Ixl-Vilm I\ =-im i2=-v2im h=VzIm !•>= Im Ii =V2Im I^-Vlhn I3 = - hn s I-i—VzIm I^ViIm Fig. 335.—Revolving field of a two-pole, three-phase induction motor. the coils M, N and Q are given by the curves in diagram R; atinstant A for example the current in phase 1 = -\-Im…
Electrical engineering
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