Question 94Electricity & Electronics - Assistant Engineer

The correct answer is A) wound rotor induction motor. The wound rotor induction motor is commonly used in hoist and crane applications due to its ability to provide precise speed control and high starting torque. The wound rotor design allows for adjusting the motor's resistance and reactance, which is important for controlling the speed and torque characteristics of the hoist. The other options are incorrect because: B) Synchronous motors are not typically used in hoist controllers, as they do not provide the same level of speed control as induction motors. C) Stepper motors are generally used for precise positioning applications, not for the high-power requirements of a hoist controller. D) Squirrel cage induction motors do not have the same level of speed control capabilities as the wound rotor design.