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Question # 2(25 points) A three phase, 200 hp, 2400 V, 60 Hz, 4 pole, Y connected synchronous mot...
Problem 2 A 15 HP, 96% efficient, three-phase Wye-connected synchronous motor is connected to a 4...
Problem 2 A 15 HP, 96% efficient, three-phase Wye-connected synchronous motor is connected to a 480 VAC, 60 Hz power supply. The field excitation is set such that the power factor is 0.97 leading. The machine draws 9 kW from the supplv. The per-phase armature reactance is 9500. Find the internally generated voltage, E, Calculate the motor torque angle, δ. Draw the phasor diagram, showing Vn E, XsL, IA ,Θ and δ. a. b. c.
Problem 2 A 15 HP,...
(Question 1): (4pts) A three-phase, 2300-V, 60-Hz, 10-pole, A-connected cylindrical rotor synchronous motor has a synchronous...
(Question 1): (4pts) A three-phase, 2300-V, 60-Hz, 10-pole, A-connected cylindrical rotor synchronous motor has a synchronous reactance of 4.0 82/phase. The armature resistance may be neglected. It is connected to 2300-V source and drives a system with its excitation set to give a PF of 0.9-leading when the power is 500-kW. (a) Sketch the phasor diagram of this motor. (b) Calculate the armature current. (c) Calculate the excitation voltage and torque angle. (d) If the load torque is increased by...
Question 4 (10 marks) A) A 10-kVA, 415-V, three phase, Y -connected synchronous generator has a...
Question 4 (10 marks) A) A 10-kVA, 415-V, three phase, Y -connected synchronous generator has a winding resistance of 0.3 Q and a synchronous reactance of 0.6 on a per phase basis. Determine its voltage regulation at full load when the power factor is (a) 75% lagging and (b) 75% leading. B) (10 marks) A 220-V, Y-connected, three-phase, synchronous motor has a synchronous reactance of 4 O/phase and negligible armature winding resistance. At a certain load the motor takes 7.5...
4. A 150 kVA, 460-V, four pole, 60 Hz, three phase, Y-connected synchronous motor operatingat rat...
Electric Machines - Synchronous Motors
4. A 150 kVA, 460-V, four pole, 60 Hz, three phase, Y-connected synchronous motor operatingat rated load has a synchronous reactance of 1.20 ohms/phase, determine: Excitation voltage Power angle Pull-out torque Draw a phasor diagram a. b. c. d.
4. A 150 kVA, 460-V, four pole, 60 Hz, three phase, Y-connected synchronous motor operatingat rated load has a synchronous reactance of 1.20 ohms/phase, determine: Excitation voltage Power angle Pull-out torque Draw a phasor diagram a....
A three-phase, Y-connected, 6.9-kV, 8-pole, 60-Hz, synchronous motor has a synchronous impedance of 0.01+j6 Ω/phase. The...
A three-phase, Y-connected, 6.9-kV, 8-pole, 60-Hz, synchronous motor has a synchronous impedance of 0.01+j6 Ω/phase. The motor is energized at its rated voltage and frequency, and draws a line current of 100 A. The motor rotates a load, while operating at a lagging power factor of 0.9. Calculate the torque developed by the motor: (a) considering the armature resistance (b) neglecting the armature resistance
2) A 480 V, 60 Hz, 400 hp 0.8 PF-lagging eight-pole A-connected synchronous motor has a...
2) A 480 V, 60 Hz, 400 hp 0.8 PF-lagging eight-pole A-connected synchronous motor has a synchronous reactance of 0.6 and negligible armature resistance. Ignore the mechanical and core losses. The magnitude of the internal machine voltage is 480 V when the field current is 4 A. Assume magnetic linearity. Initially, the motor operates at the rated conditions. a) Find the speed of this motor. b) Find the armature and field currents. c) What is the developed torque? What is...
Be detailed please A three-phase y-connected 2300 V, 60 Hz round-rotor synchronous motor has a synchronous...
Be detailed please
A three-phase y-connected 2300 V, 60 Hz round-rotor synchronous motor has a synchronous reactance of 2 ohms/ phase and negligible armature resistance. 2. If the motor takes a line current of 350 A operating at a leading pf of 0.8. calculate the armature voltage and the power angle. If the motor is operating on load with a load angle of-20%, and the excitation is adjusted so that the armature voltage is equal in magnitude to the terminal...
A 208 V, star-connected, 3-phase synchronous motor has a synchronous reactance of 4 ohms/phase and negligible...
A 208 V, star-connected, 3-phase synchronous motor has a synchronous reactance of 4 ohms/phase and negligible armature winding resistance. At a certain load, the motor takes 7.2 kW at 0.8 pf lagging. If the power developed by the motor remains the same while the excitation voltage is increased by 50% by raising the field excitation, determine (a) the new armature current and (b) the new power factor.
A 3-phase, 600 kVA, 600 V, 60 Hz, 16 pole, Y-connected, round rotor synchronous motor has...
A 3-phase, 600 kVA, 600 V, 60 Hz, 16 pole, Y-connected, round rotor synchronous motor has Xs = 0.492 22 and a negligible armature resistance. The motor is supplied from a 589V infinity bus, and draws 520 kW of real power at a 0.9 leading power factor. Its mechanical loss at the synchronous speed is 20 kW and the core loss is 15 kW. a) [7 marks] Calculate the generated voltage Ef , the load angel 8, and the efficiency...
A three-phase synchronous motor has a synchronous reactance of 7 ohm/phase. And the armature resistance is...
A three-phase synchronous motor has a synchronous reactance of 7 ohm/phase. And the armature resistance is negligible. The input power is 1000 kW, and the excitation voltage is 4500 volts rms. If the terminal voltage of the motor is 4060 volts rms. Then find: a) the power angle ; b) the armature current ; c) the power factor
Problem 2 A 15 HP, 96% efficient, three-phase Wye-connected synchronous motor is connected to a 480 VAC, 60 Hz power supply. The field excitation is set such that the power factor is 0.97 leading. The machine draws 9 kW from the supplv. The per-phase armature reactance is 9500. Find the internally generated voltage, E, Calculate the motor torque angle, δ. Draw the phasor diagram, showing Vn E, XsL, IA ,Θ and δ. a. b. c.
Problem 2 A 15 HP,...
(Question 1): (4pts) A three-phase, 2300-V, 60-Hz, 10-pole, A-connected cylindrical rotor synchronous motor has a synchronous reactance of 4.0 82/phase. The armature resistance may be neglected. It is connected to 2300-V source and drives a system with its excitation set to give a PF of 0.9-leading when the power is 500-kW. (a) Sketch the phasor diagram of this motor. (b) Calculate the armature current. (c) Calculate the excitation voltage and torque angle. (d) If the load torque is increased by...
Question 4 (10 marks) A) A 10-kVA, 415-V, three phase, Y -connected synchronous generator has a winding resistance of 0.3 Q and a synchronous reactance of 0.6 on a per phase basis. Determine its voltage regulation at full load when the power factor is (a) 75% lagging and (b) 75% leading. B) (10 marks) A 220-V, Y-connected, three-phase, synchronous motor has a synchronous reactance of 4 O/phase and negligible armature winding resistance. At a certain load the motor takes 7.5...
Electric Machines - Synchronous Motors
4. A 150 kVA, 460-V, four pole, 60 Hz, three phase, Y-connected synchronous motor operatingat rated load has a synchronous reactance of 1.20 ohms/phase, determine: Excitation voltage Power angle Pull-out torque Draw a phasor diagram a. b. c. d.
4. A 150 kVA, 460-V, four pole, 60 Hz, three phase, Y-connected synchronous motor operatingat rated load has a synchronous reactance of 1.20 ohms/phase, determine: Excitation voltage Power angle Pull-out torque Draw a phasor diagram a....
2) A 480 V, 60 Hz, 400 hp 0.8 PF-lagging eight-pole A-connected synchronous motor has a synchronous reactance of 0.6 and negligible armature resistance. Ignore the mechanical and core losses. The magnitude of the internal machine voltage is 480 V when the field current is 4 A. Assume magnetic linearity. Initially, the motor operates at the rated conditions. a) Find the speed of this motor. b) Find the armature and field currents. c) What is the developed torque? What is...
Be detailed please
A three-phase y-connected 2300 V, 60 Hz round-rotor synchronous motor has a synchronous reactance of 2 ohms/ phase and negligible armature resistance. 2. If the motor takes a line current of 350 A operating at a leading pf of 0.8. calculate the armature voltage and the power angle. If the motor is operating on load with a load angle of-20%, and the excitation is adjusted so that the armature voltage is equal in magnitude to the terminal...
A 3-phase, 600 kVA, 600 V, 60 Hz, 16 pole, Y-connected, round rotor synchronous motor has Xs = 0.492 22 and a negligible armature resistance. The motor is supplied from a 589V infinity bus, and draws 520 kW of real power at a 0.9 leading power factor. Its mechanical loss at the synchronous speed is 20 kW and the core loss is 15 kW. a) [7 marks] Calculate the generated voltage Ef , the load angel 8, and the efficiency...
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