Question
Download Solution PDFIn a 3-phase induction motor, rotor resistance is equal to rotor reactance. What will be the starting torque?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFTorque in the 3-phase induction motor
The torque of a 3-phase induction motor is given by:
where, V = Supply
ωs = Synchronous speed in radian/sec
R2 = Rotor resistance
X2 = Rotor reactance
s = Slip
Condition for maximum torque
The maximum torque of a 3-phase induction motor occurs at:
If the maximum torque has to occur in starting, the value of the slip (s)=1
The maximum torque of a 3ϕ induction motor occurs when rotor resistance is equal to the rotor reactance.
Last updated on May 29, 2025
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