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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

Power System Analysis and Design (MindTap Course List)
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
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.4P
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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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