QUESTION THREE A 200 kW, 400 V, six pole, separately-excited DC machine has a rated speed of 500 rpm, an armature winding resistance of 0.05 2, a field winding resistance of 20 2, and a rated field voltage of 200 V. The armature winding consists of 2000 conductors connected in a lap winding. (a) Sketch the equivalent circuit of the separately-excited DC machine operating as a generator. (b) Calculate the armature constant of the machine. (c) Calculate the useful flux per-pole when the generator runs at rated speed, on no load, with the armature terminal voltage equal to rated voltage (d) Calculate the armature terminal voltage when the generator is on load supplying rated power. (e) Calculate the efficiency of the generator when it supplies full-load. The friction and windage losses, the core losses and the stray losses add up to 5 kW.

QUESTION THREE A 200 kW, 400 V, six pole, separately-excited DC machine has a rated speed of 500 rpm, an armature winding resistance of 0.05 2, a field winding resistance of 20 2, and a rated field voltage of 200 V. The armature winding consists of 2000 conductors connected in a lap winding. (a) Sketch the equivalent circuit of the separately-excited DC machine operating as a generator. (b) Calculate the armature constant of the machine. (c) Calculate the useful flux per-pole when the generator runs at rated speed, on no load, with the armature terminal voltage equal to rated voltage (d) Calculate the armature terminal voltage when the generator is on load supplying rated power. (e) Calculate the efficiency of the generator when it supplies full-load. The friction and windage losses, the core losses and the stray losses add up to 5 kW.

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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