A three phase induction motor, 2 poles, for washing machine, is working at full load in spin-dry,supplied with a voltage of V,= 220 V, at frequency f,=50 Hz. Given data:rated torque: C, = 1,9 Nmrated slip: Sn= 6,67 %rated current: I, = 2,55 Arated power factor: coso, = 0,75Evaluate:the efficiency at rated load n (%)

Answered: A three phase induction motor, 2 poles,…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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A three phase induction motor, 2 poles, for washing machine, is working at full load in spin-dry,
supplied with a voltage of V,= 220 V, at frequency f,=50 Hz. Given data:
rated torque: C, = 1,9 Nm
rated slip: Sn
= 6,67 %
rated current: I, = 2,55 A
rated power factor: coso, = 0,75
Evaluate:
the efficiency at rated load n (%)

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The Induction motors are the asynchronous motor that runs at a speed less than the synchronous. The motor is basically an energy conversion device, in a 3-phase Induction motor 3-phase electrical energy is converted into mechanical energy. The induction motor is the most widely used motor in households and also for industrial purposes. The induction motor is the self-starting motor, it does not require any external energy source to start rotating. The working principle of the induction motor is based on electromagnetic induction.

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