Power Stages of Induction Motor (TAGALOG)
The power input to the rotor of a 400 V, 50 Hz, 6- pole, 3 - phase induction motor is 20 kW. The slip is 3%. Calculate (i) the frequency of the rotor currents (ii) rotor speed (iii) rotor copper losses and (iv) rotor resistance per phase if the rotor current is 60 A. ans. (i) 1.5 Hz, (ii) 970 rpm, (iii) 600 W, (iv) 0.055 ohms
A 3-phase, 6 pole, 50 Hz induction motor develops 3.73kW at 960 rpm. What will be the stator input if the stator loss is 280 W? ans. 4,165.42 W
A 5-hp, 4 pole, 60 Hz, 3 phase induction motor draws 4, 590 watts from the line. What is the speed of this motor when delivering 4.95 hp, if the core loss is 250 watts, the stator copper loss is 390 watts, and the friction and windage loss is 70 watts? Ans. 1714 rpm
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