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On no-load, a shunt motor takes 5 A at 250 V, the resistances of the field and armature circuits are 250 22 and 0.1 22 respectively. Calculate the output power and efficiency of the motor when the total supply current is 81 A at the same supply voltage. State any assumptions made. [18.5 kW; 91%. It is assumed that windage, friction and eddy current losses are independent of the current and speed]

On no-load, a shunt motor takes 5 A at 250 V, the resistances of the field and armature circuits are 250 22 and 0.1 22 respectively. Calculate the output power and efficiency of the motor when the total supply current is 81 A at the same supply voltage. State any assumptions made. [18.5 kW; 91%. It is assumed that windage, friction and eddy current losses are independent of the current and speed]

Introductory Circuit Analysis (13th Edition)
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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Please help me answer number 2. Please show a CLEAR and READABLE solution/s. Thanks!!! The course subject is Electrical Machines 1.

NOTE: The answer is given on the bottom side of the image. Could you show me the solution to how to get it? Super thanks!!!

2. On no-load, a shunt motor takes 5 A at 250 V, the resistances of the field and armature circuits are 250 22 and 0.12 respectively. Calculate the output power and efficiency of the motor when the total supply current is 81 A at the same supply voltage. State any assumptions made. [18.5 kW; 91%. It is assumed that windage, friction and eddy current losses are independent of the current and speed]
Transcribed Image Text:2. On no-load, a shunt motor takes 5 A at 250 V, the resistances of the field and armature circuits are 250 22 and 0.12 respectively. Calculate the output power and efficiency of the motor when the total supply current is 81 A at the same supply voltage. State any assumptions made. [18.5 kW; 91%. It is assumed that windage, friction and eddy current losses are independent of the current and speed]
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