In a closed-loop servo system, which outputs does the drive typically regulate using feedback?

In a closed-loop servo system, which outputs does the drive typically regulate using feedback?

• A. Temperature and humidity
• B. Position, speed, and torque
• C. Voltage and current only
• D. Frequency and phase

Answer: (B)

In a closed-loop servo system, feedback is used to continuously correct the actual motion of the motor to match the commanded motion. The drive uses sensors (like an encoder for position and often a tachometer for speed) and adjusts the motor current to achieve the desired motion, which means it regulates position, speed, and the resulting torque. Position feedback ensures the motor reaches and holds the exact position; speed feedback keeps the motor moving at the commanded velocity; torque (controlled by current) adjusts the force the motor produces to meet the load requirements. Environmental factors such as temperature and humidity aren’t controlled by the servo drive through feedback. Likewise, regulating voltage and current alone isn’t the focus of the motion feedback loop, and frequency and phase describe electrical supply characteristics rather than the mechanical outputs the servo loop actively controls.

In a closed-loop servo system, feedback is used to continuously correct the actual motion of the motor to match the commanded motion. The drive uses sensors (like an encoder for position and often a tachometer for speed) and adjusts the motor current to achieve the desired motion, which means it regulates position, speed, and the resulting torque. Position feedback ensures the motor reaches and holds the exact position; speed feedback keeps the motor moving at the commanded velocity; torque (controlled by current) adjusts the force the motor produces to meet the load requirements.

Environmental factors such as temperature and humidity aren’t controlled by the servo drive through feedback. Likewise, regulating voltage and current alone isn’t the focus of the motion feedback loop, and frequency and phase describe electrical supply characteristics rather than the mechanical outputs the servo loop actively controls.