Question

What is the condition for the maximum torque of 3-\(\varphi\) induction motor?

• A. The rotor resistance is equal to the rotor reactance at the full load.
• B. The rotor resistance is equal to the rotor reactance at the supply frequency.
• C. The rotor resistance is less than the rotor reactance at the supply frequency.
• D. The rotor resistance is greater than the rotor reactance at the supply frequency.

Hint:

For maximum torque in induction motors, the rotor resistance should be equal to the rotor reactance at the supply frequency.

Answer 1

The Correct Option is B

The maximum torque in a 3-phase induction motor occurs when the rotor resistance equals the rotor reactance at the supply frequency. This condition maximizes the power transfer to the rotor, resulting in the highest torque.