Question

Which component of a servo motor is responsible for providing feedback?

• A. Encoder
• B. Transistor
• C. Capacitor
• D. Diode

Hint:

Servo Motor Feedback. Servo motors operate closed-loop, requiring a feedback sensor to measure the output (position/velocity). Common sensors include encoders, potentiometers, and resolvers.

Answer 1

The Correct Option is A

A servo motor is a rotary or linear actuator that allows for precise control of angular or linear position, velocity, and acceleration
It operates as a closed-loop system
A key component of this closed-loop system is a feedback device that measures the actual position (or sometimes velocity) of the motor shaft
This measured value is compared to the desired command position/velocity, and the controller adjusts the motor drive signal based on the error
Common feedback devices used in servo motors include: - Encoders (Rotary or Linear): Provide digital or analog signals indicating position and/or velocity
Optical encoders are very common
- Potentiometers: Provide an analog voltage proportional to position (less common in high-performance servos)
- Resolvers: Analog devices providing position information
- Tachometers: Measure velocity
Transistors, capacitors, and diodes are electronic components used in the motor drive or control circuitry, but they do not directly measure the motor's output state for feedback
The encoder is the component specifically designed for providing position/velocity feedback