AC servo system composition_AC servo system working principle

AC servo system composition

AC servo system usually consists of the following main components:

AC servo motor: AC servo motor is one of the core components of servo system. Its speed, torque, position and other motion states can be precisely controlled. Commonly used AC servo motors include induction motors and permanent magnet synchronous motors.

Encoder: Encoder is an important part of feedback control, used to provide real-time feedback of motor position and speed. Common encoders include absolute encoders and incremental encoders.

Servo drive: A servo drive is an electronic component that converts control signals into outputs such as voltage and current to control the speed, torque, and position of the motor. A servo drive usually includes a power amplifier, a controller, and an inverter.

Controller: The controller is the brain of the servo system, used to implement the control algorithm and the calculation and generation of control signals. Common controllers include digital signal processors (DSP), programmable logic controllers (PLC) and single-chip microcomputers.

Power supply: The servo system requires a stable and reliable power supply to ensure the normal operation of the motor and controller.

Signal input and output module: The signal input and output module is used to connect external sensors and actuators to realize the input and output of control signals and feedback signals.

Connecting cables and mechanical parts: Connecting cables and mechanical parts are used to connect components such as motors, encoders, servo drives and controllers, and realize mechanical motion transmission.

In short, the AC servo system consists of an AC servo motor, encoder, servo driver, controller, power supply, signal input and output modules, connecting cables and mechanical components, and achieves high-precision motion control through precision control.

Working Principle of AC Servo System

The AC servo system is a precision control system that is usually used in applications that require high-precision motion control, such as machine tools, automated production lines, and robots. It consists of an AC servo motor, a servo drive, and a controller, and uses sensors to provide real-time feedback on the motion state to achieve high-precision motion control.

Here is how the AC servo system works:

Sensor feedback signal: AC servo motors are equipped with encoders or Hall sensors, which can provide real-time feedback on the motor's position, speed, acceleration and other motion states.

Controller calculates error: The controller calculates the control signal by comparing the error between the set value and the actual feedback value, and adjusts the motor motion state to make the error as small as possible.

Servo drive controls the motor: The servo drive converts the control signal into outputs such as voltage and current to control the motion state of the AC servo motor, such as speed and torque.

Feedback control closed loop: The sensor feedback signal is transmitted to the controller again to form a feedback control closed loop. By repeatedly comparing the error and continuously adjusting the control signal, the motor can maintain precise motion with a small error.

In short, the AC servo system achieves high-precision control of the motor's motion state through continuous feedback and adjustment, enabling it to accurately complete various motion tasks in various complex working scenarios.