Elevators run on what motor?

Elevators run on what motor?

• A. DC motor
• B. AC motor
• C. Servo motor
• D. Stepper motor

Answer: (B)

Elevators need to deliver high starting torque and smooth, controlled motion over a wide range of loads and speeds. An AC motor, paired with a variable-frequency drive, provides that combination: robust torque, reliable operation, and easy control of speed without complex and high-maintenance components. Modern elevator systems use AC induction or permanent-magnet synchronous motors in either geared or gearless traction configurations, which are durable and efficient for heavy hoisting. DC motors can offer strong starting torque, but they require more maintenance (brushes and commutators) and less efficient speed control. Servo and stepper motors are excellent for precise positioning in smaller, light-duty applications, but they aren’t suited to the long travel, heavy-load demands and reliability requirements of typical building elevators. That’s why the standard for elevators is an AC motor.

Elevators need to deliver high starting torque and smooth, controlled motion over a wide range of loads and speeds. An AC motor, paired with a variable-frequency drive, provides that combination: robust torque, reliable operation, and easy control of speed without complex and high-maintenance components. Modern elevator systems use AC induction or permanent-magnet synchronous motors in either geared or gearless traction configurations, which are durable and efficient for heavy hoisting.

DC motors can offer strong starting torque, but they require more maintenance (brushes and commutators) and less efficient speed control. Servo and stepper motors are excellent for precise positioning in smaller, light-duty applications, but they aren’t suited to the long travel, heavy-load demands and reliability requirements of typical building elevators. That’s why the standard for elevators is an AC motor.