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Question-4: A 3-phase, Y-connected, 50 Hz, 8-pole, 380 V, 200 kVA salient pole synchronous machine has the following per phase parameters: The direct axis synchronous reactance is 1 ohms. The quadrature axis synchronous reactance is 0.8 ohms. The armature winding resistance is neglected. The rotational and core losses are totally 1800 W. This machine is synchronized to the 3- phase infinite bus having 380 V at 50 Hz and operated as a motor driving a mechanical load. This motor draws 150 A from the infinite bus at 0.7 leading power factor. a) Find the load angle, b) Find induced voltage, c) Find the shaft torque, d) Find the rotor speed in rpm, e) Find the efficiency and shaft power

Question-4: A 3-phase, Y-connected, 50 Hz, 8-pole, 380 V, 200 kVA salient pole synchronous machine has the following per phase parameters: The direct axis synchronous reactance is 1 ohms. The quadrature axis synchronous reactance is 0.8 ohms. The armature winding resistance is neglected. The rotational and core losses are totally 1800 W. This machine is synchronized to the 3- phase infinite bus having 380 V at 50 Hz and operated as a motor driving a mechanical load. This motor draws 150 A from the infinite bus at 0.7 leading power factor. a) Find the load angle, b) Find induced voltage, c) Find the shaft torque, d) Find the rotor speed in rpm, e) Find the efficiency and shaft power

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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Question-4: A 3-phase, Y-connected, 50 Hz, 8-pole, 380 V, 200 kVA salient pole synchronous machine has the following per phase parameters: The direct axis synchronous reactance is 1 ohms. The quadrature axis synchronous reactance is 0.8 ohms. The armature winding resistance is neglected. The rotational and core losses are totally 1800 W. This machine is synchronized to the 3- phase infinite bus having 380 V at 50 Hz and operated as a motor driving a mechanical load. This motor draws 150 A from the infinite bus at 0.7 leading power factor. a) Find the load angle, b) Find induced voltage, c) Find the shaft torque, d) Find the rotor speed in rpm, e) Find the efficiency and shaft power
Transcribed Image Text:Question-4: A 3-phase, Y-connected, 50 Hz, 8-pole, 380 V, 200 kVA salient pole synchronous machine has the following per phase parameters: The direct axis synchronous reactance is 1 ohms. The quadrature axis synchronous reactance is 0.8 ohms. The armature winding resistance is neglected. The rotational and core losses are totally 1800 W. This machine is synchronized to the 3- phase infinite bus having 380 V at 50 Hz and operated as a motor driving a mechanical load. This motor draws 150 A from the infinite bus at 0.7 leading power factor. a) Find the load angle, b) Find induced voltage, c) Find the shaft torque, d) Find the rotor speed in rpm, e) Find the efficiency and shaft power
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