A three-phase, four-pole, 440-V (line-to-line), 60-Hz induction motor is supplied from a constant Volts/Hertz adjustable speed drive controller. The motor has a magnetizing inductance of 80 mH per phase and an effective rotor resistance referred to the stator side of 0.4 N per phase. Leakage reactances and stator resistance may be neglected.

A three-phase, four-pole, 440-V (line-to-line), 60-Hz induction motor is supplied from a constant Volts/Hertz adjustable speed drive controller. The motor has a magnetizing inductance of 80 mH per phase and an effective rotor resistance referred to the stator side of 0.4 N per phase. Leakage reactances and stator resistance may be neglected.

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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Concept explainers

Stator and Rotor Magnetic Field

The stator and rotor magnetic field is the resulting magnetic field generated by a system of coils that are symmetrically aligned. They are supplied with polyphase currents. The magnetic field is generated by poly-phase (two or more phases) current or single-phase current. In the latter case, two field stator windings are supplied and two resulting electromagnetic fields are generated beyond the stage.

Question

A three-phase, four-pole, 440-V (line-to-line), 60-Hz induction motor is supplied from a
constant Volts/Hertz adjustable speed drive controller. The motor has a magnetizing
inductance of 80 mH per phase and an effective rotor resistance referred to the stator side
of 0.4 per phase. Leakage reactances and stator resistance may be neglected.

Assume Motor at rated voltage 440V an frequency at 60Hz. What will the speed of the motor be
driving a load of 45 Nm?

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