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Engineering · Electrical Engineering
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QUESTION 3 (35 points) A Y connected three phase induction motor, 230 V (line to line), 11.5 hp, 60 Hz, 6 poles has the following stator side equivalent circuit parameters: R, 0.32, R2 -0.152 Xi-0.51Ω, X,-0.25Ω, Χ. 13.7Ω.Total losses including rotational and ferromagnetic are constant at 480 W and are independent of the load. The motor is operating at rated voltage and frequency with a slip of 4.3%. Determine the following : 1. Synchronous speed and the speed of the rotor. 2. Airgap rotating magnetic field speed. 3. Frequency of the rotor currents. 4. Stator current. 5. Power factor 6. Output power and torque 7. efficiency 5 points) (5 points) (5 points) (5 points) (5 points) (5 points) (5 points)
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