A three phase, 60 Hz, 15-hp, 208V, Y-connected, 4-pole induction motor runs at 1728 rpm when it delivers rated output power. Calculate the following: 1. frequency of motor currents. 2. speed of rotor field with respect to the stator. 3. speed of the rotor magnetic field with respect to the stator rotating magnetic field

A three phase, 60 Hz, 15-hp, 208V, Y-connected, 4-pole induction motor runs at 1728 rpm when it delivers rated output power. Calculate the following: 1. frequency of motor currents. 2. speed of rotor field with respect to the stator. 3. speed of the rotor magnetic field with respect to the stator rotating magnetic field

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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Concept explainers

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.

Question

A three phase, 60 Hz, 15-hp, 208V, Y-connected, 4-pole induction motor runs at 1728 rpm when it delivers rated output power. Calculate the following:
1. frequency of motor currents.
2. speed of rotor field with respect to the stator.
3. speed of the rotor magnetic field with respect to the stator rotating magnetic field

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