(a) A 4-pole, three-phase synchronous motor is connected to a 6.6 kV, 50 Hz, power supply in Y-connection. The resistanc

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(a) A 4-pole, three-phase synchronous motor is connected to a 6.6 kV, 50 Hz, power supply in Y-connection. The resistanc

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A A 4 Pole Three Phase Synchronous Motor Is Connected To A 6 6 Kv 50 Hz Power Supply In Y Connection The Resistanc 1
A A 4 Pole Three Phase Synchronous Motor Is Connected To A 6 6 Kv 50 Hz Power Supply In Y Connection The Resistanc 1 (56.76 KiB) Viewed 54 times
(a) A 4-pole, three-phase synchronous motor is connected to a 6.6 kV, 50 Hz, power supply in Y-connection. The resistance and synchronous reactance of the motor are 9 12 per phase and 14 12 per phase respectively. It is running on full-load and induces an excitation emf of 3.3 kV at a torque angles of 9º. Assume the total mechanical and stray losses to be 75 kW. (i) Sketch the per-phase equivalent circuit of the motor. (3 marks) (ii) Calculate the excitation current, la. (6 marks) (iii) Calculate the power factor. (2 marks) (iv) Determine the output power of the motor. (4 marks)
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