The starting torque output of a wound-rotor induction motor is poor when all resistance is removed from the rotor circuit.

Question

Quizplus · Accepted Answer

Removing all resistance from the rotor circuit of a wound-rotor induction motor results in a low starting torque because the rotor current is high, but the power factor is low, leading to inefficient torque production. Adding resistance improves the power factor and increases starting torque.

The Starting Torque Output of a Wound-Rotor Induction Motor Is