An 60 Hz, three-phase induction motor has 4 poles and a rotor resistance of 0.13 N per phase and runs at 1746 rpm at full load. Neglect the stator impedance, answer the following questions: • Calculate the additional rotor resistance that will reduce its speed to 1484.1 if torque is not changed. Stator Зф ас supply Rotor Reat Ω • Calculate the additional rotor resistance that will reduce its speed to 1484.1 if the torque is Rotor resistance. proportional to the square of the speed. Rext

An 60 Hz, three-phase induction motor has 4 poles and a rotor resistance of 0.13 N per phase and runs at 1746 rpm at full load. Neglect the stator impedance, answer the following questions: • Calculate the additional rotor resistance that will reduce its speed to 1484.1 if torque is not changed. Stator Зф ас supply Rotor Reat Ω • Calculate the additional rotor resistance that will reduce its speed to 1484.1 if the torque is Rotor resistance. proportional to the square of the speed. Rext

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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