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2: A 20 kW, 440-V, short-shunt, compound d.c. generator has a full-load efficiency of 7%. If the resistance of the armature and interpoles is 0.4 2 and that of the series and nunt fields 0.25 Q and 240 2 respectively, calculate the combined bearing friction, indage and core-loss of the machine.

2: A 20 kW, 440-V, short-shunt, compound d.c. generator has a full-load efficiency of 7%. If the resistance of the armature and interpoles is 0.4 2 and that of the series and nunt fields 0.25 Q and 240 2 respectively, calculate the combined bearing friction, indage 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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Q2: 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 2 and that of the series and shunt fields 0.25 Q and 240 Q respectively, calculate the combined bearing friction, windage and core-loss of the machine.
Transcribed Image Text:Q2: 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 2 and that of the series and shunt fields 0.25 Q and 240 Q respectively, calculate the combined bearing friction, windage and core-loss of the machine.
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