A 3 kV, 8 pole, 50 Hz, 3-phase induction motor has a slip ring rotor of resistance 0.12 ohm and stand still reactance of 0.48 ohm per phase. Full load torque is obtained at 720 r.p.m. Calculate (a) the ratio of maximum to full load torque (b) the speed at maximum torque.

A 3 kV, 8 pole, 50 Hz, 3-phase induction motor has a slip ring rotor of resistance 0.12 ohm and stand still reactance of 0.48 ohm per phase. Full load torque is obtained at 720 r.p.m. Calculate (a) the ratio of maximum to full load torque (b) the speed at maximum torque.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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I need answer fast please solve

A 3 kV, 8 pole, 50 Hz, 3-phase induction motor
has a slip ring rotor of resistance 0.12 ohm and
stand still reactance of 0.48 ohm per phase.
Full load torque is obtained at 720 r.p.m.
Calculate (a) the ratio of maximum to full load
torque (b) the speed at maximum torque.

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