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11. A 20 kW, 440-V, short-shunt, compound d.c. generator has a full-load efficiency of 87%. If the resistance of the armature and interpoles is 0.4 22 and that of the series and shunt fields 0.25 2 and 240 2 respectively, calculate the combined bearing friction, windage and core-loss of the machine.

11. A 20 kW, 440-V, short-shunt, compound d.c. generator has a full-load efficiency of 87%. If the resistance of the armature and interpoles is 0.4 22 and that of the series and shunt fields 0.25 2 and 240 2 respectively, calculate the combined bearing friction, windage and core-loss of the machine.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Solve question no.11 and show a clear and readable solution. Super thanks!!!

Note: Please include the circuit diagram if possible. The course subject is Electrical Machines. 

Thanks!!!

11. A 20 kW, 440-V, short-shunt, compound d.c. generator has a full-load efficiency of 87%. If the resistance of the armature and interpoles is 0.4 22 and that of the series and shunt fields 0.25 £2 and 240 2 respectively, calculate the combined bearing friction, windage and core-loss of the machine. [725 W]
Transcribed Image Text:11. A 20 kW, 440-V, short-shunt, compound d.c. generator has a full-load efficiency of 87%. If the resistance of the armature and interpoles is 0.4 22 and that of the series and shunt fields 0.25 £2 and 240 2 respectively, calculate the combined bearing friction, windage and core-loss of the machine. [725 W]
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