A 3-phase star connected induction motor has a 4-pole, stator winding. The motor runs on 50 Hz supply with 230 V between lines. The motor resistance and standstill reactance per phase are 0.25Ω and 0.8 Ω respectively. Calculate The total torque at 5 %, The maximum torque, The speed of the maximum torque if the ratio of the rotor to stator turns is 0.67 whilst neglecting stator impedance.

A 3-phase star connected induction motor has a 4-pole, stator winding. The motor runs on 50 Hz supply with 230 V between lines. The motor resistance and standstill reactance per phase are 0.25Ω and 0.8 Ω respectively. Calculate The total torque at 5 %, The maximum torque, The speed of the maximum torque if the ratio of the rotor to stator turns is 0.67 whilst neglecting stator impedance.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...

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