The book Polyphase Currents was written by author Alfred Still Here you can read free online of Polyphase Currents book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Polyphase Currents a good or bad book?
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M. F. Of rotation, represented by the length E 2 E r, will depend upon the amount of the flux entering the rotor, and the rate of cutting, or speed of the motor ; and since the former quantity is represented to a certain scale by the length O E 2, we may write length E 2 E r oc O E 2 x speed, or, speed a Q^- 2 With regard to the power given out by the motor, this is the product of torque and speed, or power oc torque x speed = (O E 2 x O I 2 ) x ^^ r = O I 2 x E 2 E n which is a measure of the ...power, expressed in watts per phase. This is graphically represented by the shaded rect- angle (Fig. 82), and, since the conditions which occur in phase A are repeated in phase B, twice the watts obtained by the above construction will be the total power developed by the rotor. It is important to know what is the amount of overload that an induction motor will stand apart from consider- ations of heating or efficiency before it will cease to respond to a further increase of load; and this point, together with the reasons for inserting resistances in rotor windings for starting purposes, will be dealt with in the following article.
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