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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A 400 V, 3-phase, 4 pole slip ring induction motor is supplied at rated voltage and frequency. The actual rotor resistance per phase is 3 2 and the stand still rotor reactance per phase is 12 2. Neglect stator resistance, reactance and magnetizing reactance. 1. Determine the value of resistance to be added to the rotor circuit to get the maximum torque at starting. 2. Determine the value of resistance to be added to the rotor circuit to get 75% of the maximum torque at starting.
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