Purchase Solution

Three-phase squirrel-cage induction motor

Not what you're looking for?

Ask Custom Question

A three-phase, 60 Hz, squirrel-cage induction motor draws a current of 385 amps per phase and a total active power of 2344 kW when operating at full load from a 4000 volt (line) supply. The corresponding speed is 709.2 rev/min. The stator is star-connected and the resistance between two stator live terminals is 0.1 ohms. The machine has 10 poles, the total iron losses are 23.4 kW and the windage and friction losses are 12 kW.

Calculate:
(i) the power factor at full load,
(ii) the active power supplied to the rotor,
(iii) the total I2R losses in the rotor,
(iv) the load mechanical power and torque and the efficiency of the motor.
(v) Estimate the starting torque for the machine, making clear any assumptions that you make.

Purchase this Solution

Solution Summary

The solution mentions relevant formulas and shows calculations.

Purchase this Solution


Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Basic Physics

This quiz will test your knowledge about basic Physics.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.