The difference between servo drive and servo system

The concept and working principle of servo drive

A servo drive is an electronic device that controls the rotation of a servo motor by providing appropriate signals to it, thereby achieving precise control of various motion parameters such as the position, speed, acceleration, etc. of the workpiece. It is widely used in motion control systems in the field of industrial production automation, such as rubber, plastic, paper, printing, packaging, woodworking, stone, glass, metal, electronics and other industries.

The working principle of the servo drive mainly consists of the following parts:

1. Controller: The controller is mainly composed of a digital signal processor (DSP) and a control algorithm. It is used to calculate the control parameters such as the position, speed and acceleration of the motor, and then output a modulated PWM signal to the servo drive.

2. Servo motor: A servo motor is an AC motor that controls the position, speed, acceleration and other parameters of the rotor by receiving PWM signals from a servo driver to achieve precise motion control.

3. Sensor: The sensor is mainly used to feedback the position and speed information of the motor, including encoders, Hall elements, magnetic encoder disks, etc.

4. Servo drive: The servo drive is mainly composed of a power amplifier, a speed measurement circuit, a feedback circuit, a protection circuit and other parts. Its main function is to convert electrical energy into mechanical energy according to the PWM signal output by the controller to control the speed and position of the motor.

In short, the servo drive completes the precise control and adjustment of the position and speed of the motor through the coordinated action of the main components such as the controller, motor and sensor, so as to realize the working process in various application fields that require precise control.

The concept and working principle of servo system

The servo system is a system that realizes precision motion control and is usually used in industrial control fields that require high precision and high-speed motion. Its working principle is to precisely control the motor to achieve precise displacement or speed regulation.

The basic components of a servo system include motors, encoders, controllers, and regulators. The motor is responsible for driving mechanical motion, the encoder is used to measure the position and speed of motion in real time, the controller calculates the motion mode of the drive motor through the input control signal and controls the motor operation, and the regulator adjusts the control signal and motor-related parameters to ensure precise control.

During operation, the controller receives the encoder signal, calculates the error between the actual position and speed and the target position and speed, then calculates the control signal to be output according to the PID control algorithm and sends it to the regulator to drive the motor to perform the corresponding movement.

In short, the servo system is a system that achieves high-precision and high-speed motion control. It includes motors, encoders, controllers, regulators, etc. It can achieve precise adjustment of motion through precise control of motors. Servo systems are widely used in automatic control, robotic production, and other fields that require high-precision and high-speed motion control.

Functional characteristics of servo drives and servo systems

Servo drives and servo systems are both electrical devices used to achieve precise control and motion. Here are their respective functional characteristics:

Functional features of servo drive:

1. Strong controllability: The servo drive has very high controllability and can achieve fast and accurate motion control by receiving control signals.

2. Good stability: Servo technology can ensure the stability and accuracy of the entire system by precisely controlling the speed and position of the motor.

3. Fast response speed: The servo drive can respond to the control signal and adjust the motion state of the motor in a very short time.

4. Encoder feedback function: The servo drive can accurately control and adjust the position information of the motor through the built-in encoder feedback function.

Functional features of servo system:

1. High-precision motion control: The servo system is based on the servo drive, which can achieve very high-precision motion control, and the control accuracy can reach the sub-millimeter level.

2. Strong scalability: The servo system can be flexibly configured and expanded to achieve various control tasks such as automation, mechanical processing, logistics and transportation in different application scenarios.

3. Easy to use: The servo system provides a friendly human-computer interaction interface and operation method, which is very easy to use and can help users quickly master and apply it.

4. High efficiency and energy saving: The servo system adopts advanced energy-saving technology, which can significantly reduce energy consumption and reduce the operating cost of the system.

In short, servo drives and servo systems have the characteristics of high precision, high efficiency, and high controllability, and can be widely used in various fields such as automation, mechanical manufacturing, robot control, and logistics and transportation.

The main structure of servo drive and servo system

The main structure of the servo drive:

As an important automatic control device, the main structure of the servo drive includes the following parts:

1. Control chip: The core part of the servo drive. The control chip implements the analysis and processing of the motor control signal. The performance of the control chip is related to the response speed and control accuracy of the servo drive.

2. Power module: The power module is mainly used to supply power to the servo motor. Generally, a DC power module is used, which is efficient and stable.

3. Signal acquisition module: The signal acquisition module is used to collect the position, speed, acceleration and other motion information of the motor rotor, and compare it with the target data (i.e. the data to be controlled) to generate a control signal.

4. Power amplifier: The power amplifier is another core part of the servo drive, which is used to convert the control signal into the working voltage and current of the motor to achieve control of the motor.

5. Overheat protection circuit: The overheat protection circuit is used to protect the servo drive and motor. When the temperature of the drive or motor is too high, the power supply will be automatically cut off to protect the servo drive and motor.

6. Control panel: The control panel usually includes LED digital tube, buttons, communication port, etc., which are used to control and set the servo drive.

In short, the main structure of the servo drive includes control chip, power module, signal acquisition module, power amplifier, overheat protection circuit and control panel. Through the coordinated work of these components, the servo drive can achieve high-precision control and high-speed response of the motor.

The main structure of the servo drive system:

The servo drive system is a control system composed of servo driver, servo motor, encoder, controller, etc. The following introduces their main structures respectively.

1. Servo drive structure:

The servo drive is a power electronic device, mainly composed of power supply, control circuit, power circuit, protection circuit, etc. Among them, the power supply mainly provides power for the entire system; the control circuit generates control signals through error amplifiers and PID algorithms; the power circuit converts the control signals into output signals that adapt to the servo motor.

2. Servo motor structure:

Servo motors are generally composed of two types: DC motors and AC motors, and are mainly composed of rotors, stators, armature coils, permanent magnets, etc. Its main function is to convert control signals into mechanical power to achieve precise adjustment of workpiece position, speed, acceleration, etc.

3. Encoder structure:

An encoder is a device used to detect the angle of rotation, which is mainly composed of gratings, photoelectric devices, substrates, etc. The servo system uses encoders to feedback the position and speed information of the motor for precise control.

4. Controller structure:

The controller is mainly used to control the servo drive to send PWM modulation signals to the servo motor to control the movement of the motor. It is mainly composed of AD converter, digital signal processor (DSP), input and output interface and other parts. The controller uses PID algorithm, fuzzy control and other technologies to calculate the motor control parameters according to the feedback position and speed information, and outputs the modulated PWM signal to the servo drive to achieve precise control and adjustment of the motor position, speed and acceleration and other parameters.

The servo drive system completes the precise control and adjustment of the position and speed of the servo motor through the organic combination of the above parts, so as to achieve the purpose of the working process in the application field that requires precise control.

The difference between servo drive and servo system

Servo drives and servo systems are both systems that achieve precise motion control of motors. The relationship and differences between them are as follows:

1. Different definitions:

A servo drive is an electronic device that controls the motion parameters of a servo motor, such as position, speed, and acceleration, by providing appropriate electrical signals to the motor. A servo system is a complete system that includes a servo drive, encoder, controller, and other parts, designed to achieve high-precision motion control of the motor.