4. A 4-pole induction motor draws 25 A from a 50 Hz, 460 V, three phase line at power factor of 0.85 lagging. The stator copper loss is 100 W, and the rotor copper loss is 500 W. The friction and windage loss is 250 W, stator core loss is 1000 W. Calculate 4.1 The airgap power [14931 W] 4.2 The slip [0.0335] 4.3 The mechanical power developed [14431 W] 4.4 The operating speed of the motor [1449.75 RPM] 4.5 The shaft torque [93.42 NM] 4.6 The full load efficiency [83.78%]

4. A 4-pole induction motor draws 25 A from a 50 Hz, 460 V, three phase line at power factor of 0.85 lagging. The stator copper loss is 100 W, and the rotor copper loss is 500 W. The friction and windage loss is 250 W, stator core loss is 1000 W. Calculate 4.1 The airgap power [14931 W] 4.2 The slip [0.0335] 4.3 The mechanical power developed [14431 W] 4.4 The operating speed of the motor [1449.75 RPM] 4.5 The shaft torque [93.42 NM] 4.6 The full load efficiency [83.78%]

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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