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A 50-kW, 250-V short-shunt compound generator has 0.06-Ω armature resistance, 0.04-Ω series field resistance, and 125-Ω shunt field resistance. a.) Calculate the induced armature voltage at rated load and terminal voltage. Assume the total brush-contact drop is 2V. b. If the total mechanical and core loss is of the generator is 1.8 kW, calculate the generator efficiency at full load. c. At what load does the generator achieve maximum efficiency?

A 50-kW, 250-V short-shunt compound generator has 0.06-Ω armature resistance, 0.04-Ω series field resistance, and 125-Ω shunt field resistance. a.) Calculate the induced armature voltage at rated load and terminal voltage. Assume the total brush-contact drop is 2V. b. If the total mechanical and core loss is of the generator is 1.8 kW, calculate the generator efficiency at full load. c. At what load does the generator achieve maximum efficiency?

Introductory Circuit Analysis (13th Edition)
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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1. A 50-kW, 250-V short-shunt compound generator has 0.06-Ω armature resistance, 0.04-Ω series field resistance, and 125-Ω shunt field resistance.

a.) Calculate the induced armature voltage at rated load and terminal voltage. Assume the total brush-contact drop is 2V.

b. If the total mechanical and core loss is of the generator is 1.8 kW, calculate the generator efficiency at full load.

c. At what load does the generator achieve maximum efficiency?

d. What is the value of this maximum efficiency?

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