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1. A six-pole, three-phase induction motor runs at 970 rev/min at a certain load. If the stator is con- nected to a 50 Hz supply, find the percentage slip at this load.

1. A six-pole, three-phase induction motor runs at 970 rev/min at a certain load. If the stator is con- nected to a 50 Hz supply, find the percentage slip at this load.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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1. A six-pole, three-phase induction motor runs at 970 rev/min at a certain load. If the stator is con- nected to a 50 Hz supply, find the percentage slip at this load. 2. A three-phase, 50 Hz induction motor has eight poles. If the full load slip is 2.5%, determine (a) the synchronous speed, (b) the rotor speed, and (c) the frequency of the rotor e.m.f.s. 3. A three-phase induction motor is supplied from a 60 Hz supply and runs at 1710 rev/min when the slip is 5%. Determine the synchronous speed.
Transcribed Image Text:1. A six-pole, three-phase induction motor runs at 970 rev/min at a certain load. If the stator is con- nected to a 50 Hz supply, find the percentage slip at this load. 2. A three-phase, 50 Hz induction motor has eight poles. If the full load slip is 2.5%, determine (a) the synchronous speed, (b) the rotor speed, and (c) the frequency of the rotor e.m.f.s. 3. A three-phase induction motor is supplied from a 60 Hz supply and runs at 1710 rev/min when the slip is 5%. Determine the synchronous speed.
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