Which actuator would you use to control the movement of a conveyor belt?

• A. A linear actuator
• B. A rubber belt
• C. A thermocouple
• D. An AC motor

Answer: (D)

To move a conveyor belt, you need a device that provides rotational motion to drive the belt’s pulleys. An actuator is a component that turns electrical energy into motion, and for a belt-driven system the motion is rotational. An AC motor is the best match because it delivers reliable, continuous rotation to power the belt through the drive pulley and rollers, and its speed can be precisely controlled with appropriate drives (like a variable-frequency drive) in industrial setups. A linear actuator makes straight-line movement, which isn’t how a belt needs to be driven. A rubber belt is the moving component, not the actuation device. A thermocouple is a temperature sensor, not an actuator. So an AC motor is the appropriate choice to control conveyor belt movement.