A separately excited DC generator has rated terminal voltage and full load armature current of 200 V and 50 A respectively and rated speed of 1500 rpm. The generator armature resistance R, = 0.1 Q and field resistance of R; = 100n and field voltage of 150 V. Calculate: 1. The induced emf and torque at full load. 2. The emf, armature current and terminal voltage at rated speed when the field voltage is changed to 100V. 3. The developed torque at rated speed when the field voltage is changed to 120V.

A separately excited DC generator has rated terminal voltage and full load armature current of 200 V and 50 A respectively and rated speed of 1500 rpm. The generator armature resistance R, = 0.1 Q and field resistance of R; = 100n and field voltage of 150 V. Calculate: 1. The induced emf and torque at full load. 2. The emf, armature current and terminal voltage at rated speed when the field voltage is changed to 100V. 3. The developed torque at rated speed when the field voltage is changed to 120V.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter11: Transient Stability

Section: Chapter Questions

Problem 11.3P

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