A three-phase, star-connected, 7460 kW, 6000V, 50 Hz synchronous motor has a power factor of 0.8, while its efficiency is 92% when feeding a load upstream. This motor has an armature resistance of 0.5 Ω and a synchronous reactance of 4.2 Ω. The stator windings are connected to an infinitely powerful network. A mechanical load equal to 75% of the rated load is connected to the shaft of the motor. According to this; a)Enter the amplitude value of the current passing through the phase windings of the motor. b) Calculate the pole wheel voltage induced in the motor c) Calculate the load angle.
A three-phase, star-connected, 7460 kW, 6000V, 50 Hz synchronous motor has a power factor of 0.8, while its efficiency is 92% when feeding a load upstream. This motor has an armature resistance of 0.5 Ω and a synchronous reactance of 4.2 Ω. The stator windings are connected to an infinitely powerful network. A mechanical load equal to 75% of the rated load is connected to the shaft of the motor. According to this; a)Enter the amplitude value of the current passing through the phase windings of the motor. b) Calculate the pole wheel voltage induced in the motor c) Calculate the load angle.
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
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.1P: Given the complex numbers A1=630 and A2=4+j5, (a) convert A1 to rectangular form: (b) convert A2 to...
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A three-phase, star-connected, 7460 kW, 6000V, 50 Hz synchronous motor has a power factor of 0.8, while its efficiency is 92% when feeding a load upstream. This motor has an armature resistance of 0.5 Ω and a synchronous reactance of 4.2 Ω. The stator windings are connected to an infinitely powerful network. A mechanical load equal to 75% of the rated load is connected to the shaft of the motor. According to this;
a)Enter the amplitude value of the current passing through the phase windings of the motor.
b) Calculate the pole wheel voltage induced in the motor
c) Calculate the load angle.
ç) Enter the value of the internal phase angle.
Transcribed Image Text:Üç fazlı, yıldız bağlı, 7460 kW, 6000V, 50 Hz 'lik bir senkron motorun güç faktörü 0,8 ileride olan bir yükü beslerken verimi %92'dir. Bu motorun endüvi direnci 0,5 Q ve senkron reaktansı 4,2 Q'dur. Stator sargıları sonsuz güçlü bir
şebekeye bağlanmıştır. Motorun miline anma yükünün %75'ine eşit bir mekanik yük bağlanmıştır. Buna göre;
a) Motorun faz sargılarından geçen akımın genlik değerini giriniz.(
Yanıt:
b) Motorda indüklenen kutup tekerleği gerilimini hesaplayınız.(
Yanıt:
c) Yük açısını hesaplayınız.(.
Yanıt:
c) İç faz açısının değerini giriniz. ( Sonuç virgülden sonra iki haneli olarak girilecektir)
Yanıt:
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