Servo

Thông tin chi tiết

In the modern industrial landscape, where precision and efficiency have become factors that determine the success of every project, servo drives emerge as an indispensable solution. So, what is servo drive? Join Amazon to explore suitable applications and selection criteria through the following article.

1. Introducing Servo Drive

Servo Drive, also known as servo amplifier, is the heart of the servo system. This is the main part that controls and manages the current to the servo motor, helping it operate accurately according to programmed instructions. The servo system includes not only the Servo Drive but also the servo motor and encoder, creating a complete system that helps perform tasks with high precision.

2. Structure of Servo Drive

Structure of Servo Drive

The source:
Provides power to the entire servo system, including:
•    AC power: Step-down transformer, rectifier and filter.
•    DC Power: Provides stable DC voltage to other components.
The digital signal processor (DSP) is the "brain" of the servo drive, responsible for:
•    Receive control signals from the controller.
•    Decode signals and calculate control parameters.
•    Produces the output signal for the amplifier.
Amplifiers:
•    Amplify the output signal from the DSP into a current and voltage suitable for the servo motor.
There are two main types:
•    PWM amplifier: Uses pulse width modulation to control the motor.
•    Analog amplifier: Uses analog signals to control the motor.
Encoder:
•    Monitor the position, speed and torque of the servo motor and provide feedback to the DSP.
There are two main types:
•    Absolute encoder: Provides the absolute position value of the motor.
•    Relative encoder: Provides a position value relative to the original position.
Communication interface:
•    Allows the servo drive to communicate with the controller and other devices in the system.
There are many different types of interfaces, including:
•    RS-232/485
•    CAN bus
•    EtherCAT
Other parts:
•    Protection board: Protects the servo drive from overloads, short circuits, etc.
•    LED board: Displays the operating status of the servo drive.
•    Connection port: Connect the servo drive to other devices.
Note:
•    The specific construction of the servo drive may vary depending on the manufacturer and model.
•    Some servo drives can integrate additional functions, such as EMI filters, noise filters, etc.

3. Operating principle of Servo Drive

The heart of the Servo system, Servo Drive, works based on the closed-loop control principle. This means that the system will continuously evaluate and adjust itself to ensure that the motor's operation achieves the highest precision. Servo Drive receives signals from the central controller, then adjusts the current sent to the motor based on that signal, helping the motor achieve the desired speed and position.
Detailed operating principle of Servo Drive:
Control signal
•    The controller (usually a PLC, CNC, or other control system) sends control signals to the servo drive.
•    This signal may include desired position, desired speed, desired torque, or other parameters depending on the application.
Signal processing and control
•    Servo drive receives the control signal and processes it using a digital signal processor (DSP).
•    The DSP analyzes the signal, compares it with the actual position of the servo motor (provided by the encoder) and calculates the deviations.
•    Based on the bias, the DSP adjusts the output signal to the amplifier.
Amplification and power supply
•    The amplifier in the servo drive receives the output signal from the DSP and amplifies it to provide enough power for the servo motor to operate.
•    Energy is supplied as current and voltage, depending on the type of servo motor.
Precise movement
•    The servo motor receives energy from the amplifier and converts it into rotational motion.
•    Thanks to its high torque and fast response, the servo motor moves precisely according to the control signal.
Continuous feedback
•    The encoder mounted on the servo motor shaft continuously monitors the position, speed and torque of the motor.
•    This feedback is sent back to the servo drive as an electrical signal.
Control loop
•    Servo drive compares the feedback information with the original control signal.
•    If there is a deviation, the DSP adjusts the output signal to the amplifier to minimize this deviation.
•    This control loop is repeated continuously (typically thousands of times per second) to ensure the servo motor moves exactly as required.
Result
Thanks to its closed-loop control system and continuous feedback, servo drives can control servo motors with high precision, high speed and high torque, meeting the needs of many precision-demanding applications. precision and high performance.
Besides
•    Servo drives can be programmed to perform various functions, such as braking, overload protection, and communication with other devices in the system.
•    Servo drive type and system configuration will depend on the specific application.

4. Advantages - disadvantages of Servo Drive

Advantage
•    High precision: Servo drives can control the movement of servo motors with high precision, typically within a few micrometers.
•    High speed: Servo drive can drive a servo motor to move at high speed, typically up to thousands of rpm.
•    High torque: Servo drives can provide high torque to servo motors, allowing them to move heavy loads.
•    Fast response: Servo drives can react quickly to changes in control signals, allowing them to control motion precisely.
•    Adjustability: Servo drives can be adjusted to meet the specific requirements of the application.
Defect
•    High cost: Servo drives are often more expensive than other types of drives, such as inverters.
•    High complexity: Servo drives can be more complex to install and operate than other types of drives.
•    High maintenance requirements: Servo drives require regular maintenance to ensure optimal performance.

5. Instructions for choosing Servo Drive

For instructions on choosing the appropriate Servo Drive, please refer to the following issues to note:

5.1. Determine usage needs

•   Type of servo motor used (AC Servo, DC Servo)
•    Servo motor power
•    Level of precision required
•    Desired speed
•    Required torque
•    Operating environment (temperature, humidity, vibration)
•    Necessary additional functions (EMI filter, noise filter, etc.)

5.2. Select manufacturer

• Reputable brand with experience in servo drive manufacturing
• High product quality, high reliability
• Good customer support

5.3. Compare servo drive models

• Compare specifications (power, speed, torque, accuracy)
• Compare additional functions
• Compare prices
• Consult experts

5.4. Some note

•   Choose a servo drive with a capacity suitable for the servo motor
•    Choose a servo drive whose precision meets application requirements
•    Choose a servo drive with a speed suitable for your needs
•    Choose a servo drive with appropriate torque for the load
•    Choose a servo drive suitable for the operating environment
•    Select necessary additional functions
•    Compare prices from different suppliers

5.5. Some reputable servo drive manufacturers

Brand LS
•   LS is a reputable Korean brand with more than 40 years of experience in the field of automation.
•    LS products are highly appreciated for their quality, reliability and efficiency.
•    Compact size
•    Silent operation
• Energy saving
• Competitive price
In addition, Servo LS also has many diverse product lines, suitable for many different needs.
For example:
•    AC servo: The most popular servo series, suitable for many applications.
•    Mini servo: Compact size, suitable for applications with limited space.
•    Direct drive servo: Combines servo motor and reducer, saving space and cost.
•    High torque servo: Suitable for applications requiring high torque.
A reputable and quality supplier of Servo Drive / Servo Motor at: https://amazen.com.vn/servo/ls.html

Brand Mitsubishi Electric
•   Outstanding performance
•    High precision: Mitsubishi Servo is equipped with high resolution encoder, ensuring absolute accuracy in position, speed and torque control.
•    High speed: Mitsubishi Servo has high rotation speed, meeting applications requiring fast speed and precision.
•    Powerful torque: Mitsubishi Servo provides powerful torque, helping to move heavy loads with ease.
•    Fast response ability: Mitsubishi Servo has the ability to respond immediately to control signals, ensuring the system operates efficiently and accurately.
• High reliability
•    Flexible adjustment capabilities
•    Easy to install and use: Servo Mitsubishi has a simple, intuitive interface that is easy to install and use.
•    Supports a variety of communication protocols: Mitsubishi Servo supports many popular communication protocols such as Modbus, EtherCAT, PROFINET, DeviceNet, making it easy to integrate into existing automation systems.
•    Flexible programming capabilities: Mitsubishi Servos can be programmed to perform customized functions according to the user's specific needs.
•    Reputable brand
•    Mitsubishi Electric is a leading Japanese multinational corporation with more than 100 years of experience in the field of automation.
•    Mitsubishi products are highly appreciated for their quality, reliability and performance.

Brand Siemens
- Siemens is a leading German multinational corporation with more than 170 years of experience in the field of automation. Siemens products are highly appreciated for their quality, reliability and performance.
- Diverse product lines:
•    Servo S120: The most popular servo line, suitable for many applications.
•    Simotion D servo: High performance servo series, suitable for applications requiring high precision and speed.
•    Servo Sinamics S: Mini servo series, compact size, saving installation space.
•    Sinamics G Servo: Direct drive servo series, combining motor and reducer, minimizing cost and size.
Omron
- Omron servo is a reliable choice for applications requiring high precision, fast speed, strong torque and absolute reliability. With many outstanding advantages and diversity in product lines, Servo Omron meets the needs of many fields such as industrial production, robotics, CNC machines, elevators,...
- Diverse product lines:
•    Servo R88D: The most popular servo line, suitable for many applications.
•    Servo R88M: High performance servo series, suitable for applications requiring high precision and speed.
•    Servo E1000: Mini servo series, compact size, saving installation space.
•    Servo AC Servo System 1S: New generation servo line, integrating many advanced features.
In addition, Servo Omron also has many other advantages:
•    Silent operation
• Energy saving
• Competitive price

6. Application of Servo Drive

Servo drive is an electronic device that plays an important role in controlling servo motors accurately and effectively. Thanks to outstanding advantages such as high precision, high speed, high torque and fast response, servo drives are widely used in many different fields, including:
Robots
Servo drives are used to control the movements of robot joints, helping them move flexibly and accurately in assembly operations, welding and cutting, painting,...
CNC machine
Servo drive ensures high precision for CNC machine axes, helping to process complex details with the highest precision.
Automatic machinery
Servo drives control the movement of parts in automatic machinery, helping them operate quickly, efficiently and accurately.
Motion control system
Servo drives are used in many different motion control systems, such as sun tracking systems, satellite stabilization systems, conveyor control systems, etc.

Some other applications
•   Printing industry: Controls the precise movement of the print head.
•    Textile industry: Controls the movements of sewing machines and embroidery machines.
•    Food processing industry: Controls the movement of production lines.
•    Entertainment industry: Controls the movement of stage lighting systems and sound systems.
In addition, servo drives are also used in:
• Tram
• Elevator system
•    Air conditioning system
•    Pump
• Compressor
Epilogue

In case you need to learn, need technical advice and order Servo Drive, please contact Amazen immediately via:

Hotline: 0934 399 068 - Sales: 0938 072 058

Email: amazen@amazen.com.vn

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