GATE EE 2016 Set 1 — Question 57
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Electrical Machines → DC Machines → Losses & Efficiency
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Question
A DC shunt generator delivers 45 A at a terminal voltage of 220 V. The armature and the shunt field resistances are 0.01 and 44 respectively. The stray losses are 375 W. The percentage efficiency of the DC generator is ____________.
Correct answer
86 to 88
Solution
Given:
Load current A
Terminal voltage V
Armature resistance
Shunt field resistance
Stray losses W
Load current A
Terminal voltage V
Armature resistance
Shunt field resistance
Stray losses W
1.Output Power: W
2.Shunt field current: A
3.Armature current: A
4.Armature copper loss: W
5.Shunt field copper loss: W
6.Total losses: W
7.Input Power: W
8.Efficiency:
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