14. A 3-phase, 400 V, star connected synchronous motor with Xd = 5 ohms/phase and X 4 ohms/phase is connected directly to the supply network. Calculate the maximum load power that could be put on the shaft, if the field current of the motor were reduced to zero. 15. The synchronous motor of problem 14 drives a load having a constant power of 30 kW. Determine the maximum stable values of torque angle for the given load power and applied voltage at minimum value of the emf induced due to excita- tion, Calculate, also, the minimum stator induced emf due to field current corres- ponding to the above load.
14. A 3-phase, 400 V, star connected synchronous motor with Xd = 5 ohms/phase and X 4 ohms/phase is connected directly to the supply network. Calculate the maximum load power that could be put on the shaft, if the field current of the motor were reduced to zero. 15. The synchronous motor of problem 14 drives a load having a constant power of 30 kW. Determine the maximum stable values of torque angle for the given load power and applied voltage at minimum value of the emf induced due to excita- tion, Calculate, also, the minimum stator induced emf due to field current corres- ponding to the above load.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Transcribed Image Text:14. A 3-phase, 400 V, star connected synchronous motor with Xd = 5 ohms/phase
and X 4 ohms/phase is connected directly to the supply network. Calculate
the maximum load power that could be put on the shaft, if the field current of
the motor were reduced to zero.
15. The synchronous motor of problem 14 drives a load having a constant power of
30 kW. Determine the maximum stable values of torque angle for the given load
power and applied voltage at minimum value of the emf induced due to excita-
tion, Calculate, also, the minimum stator induced emf due to field current corres-
ponding to the above load.
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