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A 3000 V, 24 pole, 50 Hz, 3-phase, star connected induction motor has a slip ring rotor of resistance 0.016 Ω and stand still reactance 0.265 Ω per phase.
Full load torque is obtained at a speed of 247 rev per minute. Neglect rotor impedance.
Estimate the ratio of maximum to full load torque.
Correct answer is between '2.5,2.7'. Can you explain this answer?
Most Upvoted Answer
A 3000 V, 24 pole, 50 Hz, 3-phase, star connected induction motor has ...
Concept:
The ratio of maximum torque to full load torque is

Where sm is the slip at maximum torque.
sfl is the slip at full load torque.
Slip at maximum torque, 
R2 is the rotor resistance
X2 is the rotor reactance
Calculation:
Given that, Number of poles (P) = 24
Frequency (f) = 50 Hz
Rotor resistance (R2) = 0.016 Ω
Rotor reactance (X2) = 0.265 Ω
Slip at maximum torque, 
Speed corresponding to full load torque (Nr) = 247 rpm
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Community Answer
A 3000 V, 24 pole, 50 Hz, 3-phase, star connected induction motor has ...
The resistance of the slip ring rotor is given as 0.016.
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A 3000 V, 24 pole, 50 Hz, 3-phase, star connected induction motor has a slip ring rotor of resistance 0.016 Ω and stand still reactance 0.265 Ω per phase.Full load torque is obtained at a speed of 247 rev per minute. Neglect rotor impedance.Estimate the ratio of maximum to full load torque.Correct answer is between '2.5,2.7'. Can you explain this answer?
Question Description
A 3000 V, 24 pole, 50 Hz, 3-phase, star connected induction motor has a slip ring rotor of resistance 0.016 Ω and stand still reactance 0.265 Ω per phase.Full load torque is obtained at a speed of 247 rev per minute. Neglect rotor impedance.Estimate the ratio of maximum to full load torque.Correct answer is between '2.5,2.7'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 3000 V, 24 pole, 50 Hz, 3-phase, star connected induction motor has a slip ring rotor of resistance 0.016 Ω and stand still reactance 0.265 Ω per phase.Full load torque is obtained at a speed of 247 rev per minute. Neglect rotor impedance.Estimate the ratio of maximum to full load torque.Correct answer is between '2.5,2.7'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 3000 V, 24 pole, 50 Hz, 3-phase, star connected induction motor has a slip ring rotor of resistance 0.016 Ω and stand still reactance 0.265 Ω per phase.Full load torque is obtained at a speed of 247 rev per minute. Neglect rotor impedance.Estimate the ratio of maximum to full load torque.Correct answer is between '2.5,2.7'. Can you explain this answer?.
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