2. The power input to a 3-phase induction motor is 40 kW. The stator losses total 1 kW and the mechanicallosses are 1.6 kW. Determine (i) shaft power (ii) rotor Cu loss and (iii) efficiency of the motor with[(1) 36 kW (i) 445 W (iii) 90 %)a slip of 3-5%.23. An 8-pole, 3-phase, 50 Hz induction motor is taking 50 kW and running at 725 r.p.m. Stator losses are1-2 kW and frictional losses 1.8 kW. Find (i) rotor Cu loss and (ii) efficiency of the motor.149[(1) 1.627 kW (ii) 90-75 %

The input power to the motor,Stator copper loss, mechanical losses,

and the 2. The power input to a 3-phase induction motor is 40 kW. The stator losses tot losses are 1.6 kW. Determine (i) shaft power (ii) rotor Cu loss and (iii) efficiency of the motor with [(1) 36 kW (i) 445 W (iii) 90 %1 a slip of 3-5%. P 3. An 8-pole, 3-phase, 50 Hz induction motor is taking 50 kW and running at 725 r.p.m. Stator losses are 1.2 kW and frictional losses 1.8 kW. Find (i) rotor Cu loss and (ii) efficiency of the motor. [(1) 1.627 kW (ii) 90-75 % 1

and the 2. The power input to a 3-phase induction motor is 40 kW. The stator losses tot losses are 1.6 kW. Determine (i) shaft power (ii) rotor Cu loss and (iii) efficiency of the motor with [(1) 36 kW (i) 445 W (iii) 90 %1 a slip of 3-5%. P 3. An 8-pole, 3-phase, 50 Hz induction motor is taking 50 kW and running at 725 r.p.m. Stator losses are 1.2 kW and frictional losses 1.8 kW. Find (i) rotor Cu loss and (ii) efficiency of the motor. [(1) 1.627 kW (ii) 90-75 % 1

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Similar questions

A 12 pole three phase induction motor with supply frequency of 50 Hz. If the slip is 3 % at a certain load, determine (a) the synchronous speed, (b) the speed of the rotor (c) the frequency of the induced e.m.f. in the rotor and (d) speed of the induction motor if the slip changes to 6 % Synchronous speed Answer for part 1 Speed of the rotor Answer for part 2 frequency of the rotor emf Answer for part 3 Speed of the motor if slip is changed to 6 % Answer for part 4
No load test was conducted on a three phase induction motor at different input voltages and the input power obtained was plotted against the input voltage. The intersection of the extrapolated curve on the Y-axis, would give (a) rated core loss (b) windage and friction loss (c) rated copper loss (d) rated core loss and windage and friction loss
A 3-phase, 6-pole induction motor con- nected to a 50 Hz supply runs at 975 rpm on full load. Its full-load slip is (a) 25% (c) 2.5% (b) 1.5% (d) 2.0%
1. A 220 V, 60 Hz, 6-pole, 3-phase induction motor has a slip of 3%. Determine the slip speed, and the rotor frequency.
Mention the techniques used to start 1-Φ induction motor.
A 400 V, 50 Hz 30 hp, three-phase induction motor is drawing 50 A current at 0.8 power factor lagging. The stator and rotor copper losses are 1.5 kW and 900 W respectively. The friction and windage losses are 1050 W and the core losses are 1200 W. The air-gap power of the motor will be
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(c) The rotor speed of a six-pole 50-cycle induction motor is 960 rpm. Calculate the percent slip.