EXAMPLE 4.3. A 3-phase, 6-pole, 50 Hz induction motor has a slip of 1% at no load, and 3% at full load. Determine : (a) synchromous speed; (b) no-load speed; (c) full-load speed; (d) frequency of rotor current at standstill; (e) frequency of rotor current at full load. SOLUTION.
EXAMPLE 4.3. A 3-phase, 6-pole, 50 Hz induction motor has a slip of 1% at no load, and 3% at full load. Determine : (a) synchromous speed; (b) no-load speed; (c) full-load speed; (d) frequency of rotor current at standstill; (e) frequency of rotor current at full load. SOLUTION.
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter35: Harmonics 916
Section: Chapter Questions
Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...
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Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
Question
Transcribed Image Text:of the motor
N=(1-s) N, (1-0.03) × 1500= 1455 r.p.m.
EXAMPLE 4.3. A 3-phase, 6-pole, 50 Hz induction motor has a slip of 1% at no
load, and 3% at full load. Determine : (a) synchronous speed ; (b) no-load speed; (c)
full-load speed; (d) frequency of rotor current at standstill ; (e) frequency of rotor current
at full load.
SOLUTION.
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