Electrical Engineering · Electrical Machines
For a three-phase induction motor, the torque T developed is given by: T = k s E22 R2R22 + (s X2)2 where s is the slip, E2 is the rotor induced emf at standstill, R2 is the rotor resistance, and X2 is the rotor reactance at standstill. Which of the following statements best describes the behavior of this torque-slip characteristic?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Torque is maximum when R2 = s X2, after which it decreases with a further increase in slip.✓
- 2Torque remains constant from zero speed up to synchronous speed.
- 3Torque decreases with an increase in slip for all operating conditions.
- 4Torque increases linearly with slip s for all values of slip.
Correct answer
Torque is maximum when R2 = s X2, after which it decreases with a further increase in slip.
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