Answered: three-phase, 460-V, 60-Hz, four-pole…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A three-phase, 460-V, 60-Hz, four-pole Y-connected induction motor has the following equivalent circuit parameters: Rs = 0.42Ω, Rrʹ = 0.23Ω, Xs = Xrʹ = 0.82Ω, and Xm = 22Ω. The no-load loss 60W, may be assumed constant. The rotor speed is 1750 rpm. The rotational losses at this speed is 500W. Use the approximate equivalent circuit in figure below, to determine (a) the synchronous speed Ns; (b) the slip s; (c) the input current Ii; (d) the input power Pi; (e) the input PF of the supply, PFs; (f) the gap power Pg; (g) the rotor copper loss Pru; (h) the stator copper loss Psu; (i) the developed torque Td; (j) the efficiency; (k) the starting current Irs and starting torque Ts; (l) the slip for maximum torque sm; (m) the maximum developed torque in motoring, Tmm

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