P2. A 4 pole, three-phase induction motor operates from a supply whose frequency is 50 Hz. Calculate: (i) The speed at which the magnetic field of the stator is rotating; (ii) The speed of the rotor when the slip is 0.04; (iii) The frequency of the rotor currents when slip is 0.03; (iv) The frequency of the rotor currents at standstill.

P2. A 4 pole, three-phase induction motor operates from a supply whose frequency is 50 Hz. Calculate: (i) The speed at which the magnetic field of the stator is rotating; (ii) The speed of the rotor when the slip is 0.04; (iii) The frequency of the rotor currents when slip is 0.03; (iv) The frequency of the rotor currents at standstill.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter51: Electric And Electronic Braking

Section: Chapter Questions

Problem 2SQ: Differentiate between the AC and DC magnetic fields applied to an induction motor stator.

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