A three-phase, star connected, 50Hz, 4-pole, 380V, 15HP asynchronous motor rotating at 1404 rpm below has one phase equivalent circuit parameters. The friction and wind losses of this motor are 250W. A phase equivalent circuit is simplified by taking the magnetic circuit in front of the stator circuit. Accordingly, find the slip where the maximum torque occurs, the maximum torque, the slip where the maximum power occurs, the maximum power and the development current. (Rs = 0.15Ω, R′r = 0.18Ω, Xs = 0.31Ω, X′r = 0.31Ω, Vs = 220V

A three-phase, star connected, 50Hz, 4-pole, 380V, 15HP asynchronous motor rotating at 1404 rpm below has one phase equivalent circuit parameters. The friction and wind losses of this motor are 250W. A phase equivalent circuit is simplified by taking the magnetic circuit in front of the stator circuit. Accordingly, find the slip where the maximum torque occurs, the maximum torque, the slip where the maximum power occurs, the maximum power and the development current. (Rs = 0.15Ω, R′r = 0.18Ω, Xs = 0.31Ω, X′r = 0.31Ω, Vs = 220V

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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