A variable-speed drive consists of a squirrel-cage induction motor sup-plied with three-phase, near-sinusoidal voltage of controllable magnitudeat variable frequency from an electronic inverter. The motor has a rat-ing of 460 V (L-L), 60 Hz, 100 kW, 1770 r/min, 140 A. The mechanicalload requires a torque of 3 N·m per rad/s of speed. Stator resistance,leakage inductance, and losses may be ignored.(a) To drive the load at a speed of 1200 r/min, what should be rms volt-age (L-L) and the frequency of the inverter output?(b) If the magnetizing inductance of the motor is 2.5 pu, what will be thesource power factor for the condition of (a)?

Answered: Image /qna-images/answer/4bee9d91-2a6a-4830-af18-233be5619c85.jpg

a) To drive the load at a speed of 1200 r/min, what should be rms volt- age (L-L) and the frequency of the inverter output? b) If the magnetizing inductance of the motor is 2.5 pu, what will be the source power factor for the condition of (a)?

a) To drive the load at a speed of 1200 r/min, what should be rms volt- age (L-L) and the frequency of the inverter output? b) If the magnetizing inductance of the motor is 2.5 pu, what will be the source power factor for the condition of (a)?

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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