A three-phase induction motor runs delivering 9 kilowatts to its load at efficiency of 88 %. If the stator copper losses represent 50% of total losses , the stator copper losses equal * O 619 W O 614 W O624 W 605 W

A three-phase induction motor runs delivering 9 kilowatts to its load at efficiency of 88 %. If the stator copper losses represent 50% of total losses , the stator copper losses equal * O 619 W O 614 W O624 W 605 W

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

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.

Question

A three-phase induction
motor runs delivering 9
kilowatts to its load at
efficiency of 88 %. If the stator
copper losses represent 50%
of total losses, the stator
copper losses equal *
619 W
614 W
624 W
605 W

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