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A 30 60-Hz induction motor runs at 715 rpm at no load and at 670 rpm at full load. The slip-torque relationship of the motor can be assumed to be linear from no load to full load. a) How many poles does this motor have? b) What is the slip at the rated load? c) What is the speed at one-third of the rated load? d) What is the rotor's frequency at one-third of the rated load? e) At one-third of the rated load, determine the speed of the rotor field relative to the Rotor structure

A 30 60-Hz induction motor runs at 715 rpm at no load and at 670 rpm at full load. The slip-torque relationship of the motor can be assumed to be linear from no load to full load. a) How many poles does this motor have? b) What is the slip at the rated load? c) What is the speed at one-third of the rated load? d) What is the rotor's frequency at one-third of the rated load? e) At one-third of the rated load, determine the speed of the rotor field relative to the Rotor structure

Introductory Circuit Analysis (13th Edition)
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 30 60-Hz induction motor runs at 715 rpm at no load and at 670 rpm at full load. The slip-torque relationship of the motor can be assumed to be linear from no load to full load. a) How many poles does this motor have? b) What is the slip at the rated load? c) What is the speed at one-third of the rated load? d) What is the rotor's frequency at one-third of the rated load? e) At one-third of the rated load, determine the speed of the rotor field relative to the Rotor structure Stator structure Stator rotating field i. ii.
Transcribed Image Text:A 30 60-Hz induction motor runs at 715 rpm at no load and at 670 rpm at full load. The slip-torque relationship of the motor can be assumed to be linear from no load to full load. a) How many poles does this motor have? b) What is the slip at the rated load? c) What is the speed at one-third of the rated load? d) What is the rotor's frequency at one-third of the rated load? e) At one-third of the rated load, determine the speed of the rotor field relative to the Rotor structure Stator structure Stator rotating field i. ii.
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