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A 200 Hp, 400 V, 1800 r/min DC generator has an overall efficiency of 95% and the 1'R losses in the armature is 0.025 pu. The shunt field resistance is 50 Q and the rated field current, Ir is 5A. (i) Calculate the total losses in the generator.

A 200 Hp, 400 V, 1800 r/min DC generator has an overall efficiency of 95% and the 1'R losses in the armature is 0.025 pu. The shunt field resistance is 50 Q and the rated field current, Ir is 5A. (i) Calculate the total losses in the generator.

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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A 200 Hp, 400 V, 1800 r/min DC generator has an overall efficiency of 95% and the 1'R losses in the armature is 0.025 pu. The shunt field resistance is 50 Q and the rated field current, IF is 5A. (i) Calculate the total losses in the generator. (ii) Estimate the torque needed to drive the generator at 1800 r/min, considering the shunt field is powered by a separate source, Pin = 220 000 W and the speed is 150 rad/s. (iii) Given that the no-load weight of the generator is 1200 kg and the on-1oad weight of the generator is 2100 kg. Determine the suitable weight to be considered towards getting the output power to weight ratio of the generator as the final result and propose the suitable excitation for this DC generator
Transcribed Image Text:A 200 Hp, 400 V, 1800 r/min DC generator has an overall efficiency of 95% and the 1'R losses in the armature is 0.025 pu. The shunt field resistance is 50 Q and the rated field current, IF is 5A. (i) Calculate the total losses in the generator. (ii) Estimate the torque needed to drive the generator at 1800 r/min, considering the shunt field is powered by a separate source, Pin = 220 000 W and the speed is 150 rad/s. (iii) Given that the no-load weight of the generator is 1200 kg and the on-1oad weight of the generator is 2100 kg. Determine the suitable weight to be considered towards getting the output power to weight ratio of the generator as the final result and propose the suitable excitation for this DC generator
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