Servo drive - definition
Servo drive - definition
Servo drive is a precision drive system used in Automation and Mechatronics for closed-loop motion control feedback. It consists of a servomotor, a controller (servo amplifier) and a measuring element - usually an encoder or resolver - that allows monitoring of the actual position, speed or torque. The main purpose of the servo drive is to provide dynamic and accurate motion control, adapted to the requirements of the technological process.
Unlike standard Actuators, the servo drive uses feedback to continuously correct the difference between the preset and actual state of motion, thus maintaining high positioning accuracy and stability under varying loads. This makes it suitable for use in machines CNC, robotics, assembly lines, packaging equipment, transport systems and many other applications requiring precise motion control.
Servo drives can operate in positional, velocity or torque modes, and modern systems often integrate these modes within a single system. The servo motors used in servo drives are usually synchronous motors or brushless direct current (BLDC) motors, due to their high efficiency, high power density and ability to be precisely controlled.
The servo controller analyses reference signals (control commands) and compares them with sensor feedback signals, performing real-time control calculations, usually based on PID algorithms or advanced versions thereof. Today's servo drives offer functions for diagnostics, automatic parameter adjustment, network communication (e.g. EtherCAT, CANopen, Modbus) and integration with higher-level control systems.
Thanks to their versatility, responsiveness and high precision, servo drives are a key component of modern systems Automation and robotics, supporting the development of intelligent machines and flexible production lines.
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