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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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

2. The power input to a 3-phase induction motor is 40 kW. The stator losses total 1 kW and the mechanical
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 %)
a slip of 3-5%.
2
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.
149
[(1) 1.627 kW (ii) 90-75 %

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