A 20hp, 440V, 60Hz, three phase, star-connected synchronous motor has an armature resistance per phase of 0.4 ohm. It is giving its full load output at a power factor of 0.9 leading. If the stray power losses amount to 500w, find the armature current.

A 20hp, 440V, 60Hz, three phase, star-connected synchronous motor has an armature resistance per phase of 0.4 ohm. It is giving its full load output at a power factor of 0.9 leading. If the stray power losses amount to 500w, find the armature current.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

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Concept explainers

DC Generator

An electromechanical machine which converts input mechanical energy to respective output electric energy is called a generator.

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A 20hp, 440V, 60Hz, three phase, star-connected synchronous
motor has an armature resistance per phase of 0.4 ohm. It is
giving its full load output at a power factor of 0.9 leading. If the
stray power losses amount to 500w, find the armature current.

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