-A 480 kW, 50 Hz, 3.3 kV, eight-pole-ped wound-rotor induction motor has the following parameters referred to the stator: 0.65 Ω Stator winding resistance: Rotor winding resistance: 0.50 Ω Stator leakage inductance: 10 mH Rotor leakage inductance: 10 mH Magnetizing inductance: 1040 mH (1) Calculate the synchronous speed of the motor. (ii) If the motor runs with a full-load slip of 0.03, calculate the full-load rotor speed. (iii) With the help of the equivalent circuit calculate the full-load stator current and its power factor. (iv) What is the full-load developed torque of this motor? (v) Calculate the efficiency of the motor on full-load if the core losses and the friction and windage losses are equal to 25 kW.
-A 480 kW, 50 Hz, 3.3 kV, eight-pole-ped wound-rotor induction motor has the following parameters referred to the stator: 0.65 Ω Stator winding resistance: Rotor winding resistance: 0.50 Ω Stator leakage inductance: 10 mH Rotor leakage inductance: 10 mH Magnetizing inductance: 1040 mH (1) Calculate the synchronous speed of the motor. (ii) If the motor runs with a full-load slip of 0.03, calculate the full-load rotor speed. (iii) With the help of the equivalent circuit calculate the full-load stator current and its power factor. (iv) What is the full-load developed torque of this motor? (v) Calculate the efficiency of the motor on full-load if the core losses and the friction and windage losses are equal to 25 kW.
Chapter39: Synchronous Motor Operation
Section: Chapter Questions
Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...
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Solve iii), (IV), (v), (vi)
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