A 500 V, 200 kW, long shunt compound generator induces an e.m.f. of 480 V when running at 1000 r.p.m. on no load.On full load the speed of the machine drops to 975 r.p.m. the flux increases by 15% and the terminal voltage rises to 500 V.If the series and shunt field resistances are 0.02 2 and 100 2 respectively, calculate the armature resistance, Assume a voltage drop of 1 V per brush.

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Author:Robert L. Boylestad
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A 500 V, 200 kW, long shunt compound generator induces an e.m.f. of 480 V
when running at 1000 r.p.m. on no load.On full load the speed of the machine drops
to 975 r.p.m. the flux increases by 15% and the terminal voltage rises to 500 V.If the
series and shunt field resistances are 0.02 2 and 100 2 respectively, calculate the
armature resistance, Assume a voltage drop of 1 V per brush.
Transcribed Image Text:A 500 V, 200 kW, long shunt compound generator induces an e.m.f. of 480 V when running at 1000 r.p.m. on no load.On full load the speed of the machine drops to 975 r.p.m. the flux increases by 15% and the terminal voltage rises to 500 V.If the series and shunt field resistances are 0.02 2 and 100 2 respectively, calculate the armature resistance, Assume a voltage drop of 1 V per brush.
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