Three Phase Induction Motors: Condition for Maximum Torque Under Running Conditions
CONDITION
FOR MAXIMUM TORQUE UNDER RUNNING CONDITIONS
The torque of a motor
under running condition is

The condition for
maximum torque may be obtained by differentiating the above expression with
respect to Slip s and then putting it
equal to zero. Therefore,

R2
=sX2
Thus for maximum torque
(Tm) under running condition,
Rotor resistance/phase
= slip × rotor reactance/phase at standstill.
Basic Electronics and Electrical Engineering: Chapter 5: Induction Motors : Tag: Basic Engineering : Three Phase Induction Motors - Condition for Maximum Torque Under Running Conditions
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