What is a key difference between servo motors and standard induction motors in control?

• A. Servo motors provide simpler speed control without feedback
• B. Induction motors provide precise position and velocity control with feedback
• C. Servo motors provide precise position/velocity control with feedback
• D. Induction motors require mechanical gears for speed control

Answer: (C)

The essential difference lies in feedback and closed-loop control. Servo motors come with an integrated feedback device (like an encoder) and a servo drive that continuously compares the commanded position or velocity with the actual motor state and adjusts torque to match. This enables precise position and velocity control, even under changing loads. Standard induction motors, by contrast, are typically used in open-loop or with external control, and they don’t inherently provide precise position control—speed is controlled more loosely by voltage/frequency, and exact positioning requires additional sensors and control hardware. So the standout feature of servo systems is precise position and velocity control with built-in feedback.